Re: [EVDL] Off-grid solar house and electric car charging
As I understand it, the DC output from solar panels is not at a fixed voltage, so you end up having to convert one DC voltage to another in order to power your house appliances. This DC-to-DC conversion isn't necessarily any more efficient than the DC-to-AC conversion that you would normally have to do. And the cost of buying new appliances than can deal with DC is not small. There are other better ways of avoiding inefficiency, I think. One is that many panels are set up in series, which means that if any one cell is covered by shade, the output of the entire system is reduced. (Use a different inverter technology, and set up your cells in parallel, to avoid this) Another is that high temperature reduces the efficiency of cells. (One way is to put the entire system on top of water, which will limit how hot it gets) On Sun, Jun 5, 2016 at 7:29 PM, Larry Gales via EV wrote: > If you build an off-grid solar house and use it for both your house and > charging your electric car, are there any disadvantages for using DC > current (household appliances can all be converted to DC) and avoiding AC > since you are off the grid? You avoid the cost, maintenance, and (slight) > inefficiency of inverters, but are there significant disadvantages to this > approach? > > Thanks, > > -- > Larry Gales > -- next part -- > An HTML attachment was scrubbed... > URL: < > http://lists.evdl.org/private.cgi/ev-evdl.org/attachments/20160605/ac5420ed/attachment.htm > > > ___ > UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub > http://lists.evdl.org/listinfo.cgi/ev-evdl.org > Read EVAngel's EV News at http://evdl.org/evln/ > Please discuss EV drag racing at NEDRA ( > http://groups.yahoo.com/group/NEDRA) > > -- next part -- An HTML attachment was scrubbed... URL: <http://lists.evdl.org/private.cgi/ev-evdl.org/attachments/20160605/48930d64/attachment.htm> ___ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub http://lists.evdl.org/listinfo.cgi/ev-evdl.org Read EVAngel's EV News at http://evdl.org/evln/ Please discuss EV drag racing at NEDRA (http://groups.yahoo.com/group/NEDRA)
Re: [EVDL] 12v tales
I made a pigtail "jumper cable" for my conversion. I have used it once. I put it across 4 LFP cells and just touched the digital relay input to enable the DC-DC converter. Once it came online, I didn't need the battery, and I could remove the jumper. Mike On June 5, 2016 7:20:32 PM MDT, Willie2 via EV wrote: >I was CONSTANTLY being stranded in my conversions due to dead 12v. >Mostly, from dead DC-DCs. I had GaryK, against his advice, rig a >jumper >from 4 LFP cells to the lead 12v. Dead 12v? Install the jumper and >drive home. Worry about the imbalance later. Once, when my DC-DC was >not working, I installed a pair of golf cart batteries in the passenger > >foot well. > >I've run the 12v down on my first imiev twice. Both from inadverntly >leaving the key on. For those not familiar with imievs, their idiotic >design forces one to twist the key against a spring to "crank the >engine". Having the key on runs accessories but not the DC-DC. > >The Tesla has not stranded me with a dead 12v. It warns of impending >failure. I'm on my 3rd lead 12v in the Tesla. I have a lithium 12v >ready to go in for the 4th. >___ >UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub >http://lists.evdl.org/listinfo.cgi/ev-evdl.org >Read EVAngel's EV News at http://evdl.org/evln/ >Please discuss EV drag racing at NEDRA >(http://groups.yahoo.com/group/NEDRA) ___ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub http://lists.evdl.org/listinfo.cgi/ev-evdl.org Read EVAngel's EV News at http://evdl.org/evln/ Please discuss EV drag racing at NEDRA (http://groups.yahoo.com/group/NEDRA)
Re: [EVDL] Current limiting
Hi Lee, I don't think that is how in rush current limiters work. I use them to protect my DC-DC converter caps so they don't get whacked with a high in rush current when the connection is first made. https://en.m.wikipedia.org/wiki/Inrush_current_limiter Mike On June 5, 2016 10:19:55 PM MDT, Lee Hart via EV wrote: >Mike Nickerson via EV wrote: >> If the long term current draw will be less than 10A or so, you could >use an in rush limiting resistor. That is a resistor with a negative >temperature coefficient. When cool, they have a very high resistance. >As they heat up, their resistance drops. > >This is probably the opposite of the function Gary wants. Inrush >limiters have a very LOW resistance initially, so the peak current when > >you first connect the batteries is very high. As the inrush limiter >heats up, its resistance rises -- so you wind up with quite a limited >amount of current between them. > >Gary Krysztopik wrote: >>> Does anyone have any cheap tricks for regularly connecting two large >12 >>> vdc packs together (one stationary and one mobile) and limiting >inrush >>> current when they are at different SOC? They both have huge current >>> capability but I need it for energy vs power so one has small wires >and >>> fuses. > >The "cheap trick" is to connect a light bulb between them. Pick the >bulb >so your normal current is well below what the bulb normally draws on >12v. For example, a #57 brake light draws about an amp, and a headlight > >about 4 amps, and a halogen spotlight around 10 amps. > >The bulb won't allow more than its normal rated current to flow between > >the batteries. If you try, it just lights up. But when the current is >less than this (such as while on standby), the bulb's resistance is >LOW. >The bulb is out, and the two batteries are essentially connected in >parallel for float charging, etc. ___ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub http://lists.evdl.org/listinfo.cgi/ev-evdl.org Read EVAngel's EV News at http://evdl.org/evln/ Please discuss EV drag racing at NEDRA (http://groups.yahoo.com/group/NEDRA)
Re: [EVDL] Off-grid solar house and electric car charging
The main issue I can think of is the risk of someone unplugging something drawing high current. There could be a lot more flash and arc than people would expect from AC. Also, the conversion to DC would require new switches that were DC rated on the appliances. How would you put DC into the electric car? I could see how a conversion could be set up for DC, but it seems it would be difficult for a commercial EV. They have a way to take DC direct inputs, but only under certain specifications. Mike On June 5, 2016 8:29:08 PM MDT, Larry Gales via EV wrote: >If you build an off-grid solar house and use it for both your house and >charging your electric car, are there any disadvantages for using DC >current (household appliances can all be converted to DC) and avoiding >AC >since you are off the grid? You avoid the cost, maintenance, and >(slight) >inefficiency of inverters, but are there significant disadvantages to >this >approach? > >Thanks, ___ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub http://lists.evdl.org/listinfo.cgi/ev-evdl.org Read EVAngel's EV News at http://evdl.org/evln/ Please discuss EV drag racing at NEDRA (http://groups.yahoo.com/group/NEDRA)
Re: [EVDL] Dead accessory battery... Drill baby drill
Robert Bruninga via EV wrote: I'm so fed up with 12v batteries I finally today drilled a hole in the roof right over the dome light and mounted a solar panel up there where I could reach the wires and coathanger them over to the pillar and down to the stupid 12v battery. Great idea. I did this years ago, and haven't had a dead 12v battery since. :-) Solar panel on the dash just was NOT working. AFTER doing all this, I found out why. The blocking diode to prevent night time discharge back through the panel happened to be touching the wire such that it was bypassed. Oh well. Now it will work! You'll probably get about twice the power out of the PV panel with it on the roof, too. The glass blocks a significant amount of IR, which is what the PC cells are the most sensitive to. -Original Message- From: EV [mailto:ev-boun...@lists.evdl.org] On Behalf Of Thos True via EV Subject: Re: [EVDL] Dead accessory battery (was: Shock and Awe - Historic run 9.589 Seconds @ 152 MPH!!!) Hi Bill, I have to heartily agree that the dead accessory battery happens to everyone at one time or another (Murphy dictates how difficult the timing will be). I recall that we developed the habit of having at least one back up battery just for such a situation. We usually had a couple of the Hawker Genesis batteries on hand for replacements on Father Time's drag bikes, so it wasn't too inconvenient after the first time. -Tom True On Sun, Jun 5, 2016 at 3:04 PM, Bill Dube via EV wrote: A dead 12 volt accessory battery has happened at one point or another to everyone. We typically run a small DC-to-DC converter to keep the accessory battery topped up, just to avoid the dreaded flat accessory battery. You absolutely _must_ have a 12 volt accessory battery, but a DC-DC that runs whenever the vehicle is "on" increases the reliability a great deal. Small expense, but is good insurance against forgetting to charge the 12 volt, which is easy to forget in the excitement of race day. (Ask me how I know. :-) ) We use a Vicor DC-DC converter module (or more than one in parallel) like this one: http://www.ebay.com/itm/201199082834 You might choose a different model, (like a VE-j72-CY) depending on your main pack voltage and your wattage needs. You should get a 15 volt output and trim it down to ~13.5 volts (read the data sheet). If you get one with 12 volt output, it won't charge a 12 volt battery because it really puts out exactly 12.0 volts. I don't know who originally said it but, "To finish first, one must first finish." I'm guessing, but you probably used a portable "12 volt" battery charger to recharge your Li-Ion "12 volt" accessory battery. That is likely what ruined it. Almost without exception, the open circuit voltage of all portable "12 volt battery chargers" is greater than 15 volts, (often as high as 17 volts) which is a death sentence for a "12 volt" Li-Ion pack. Always measure the open circuit voltage, with a voltmeter, on a battery charger before you use it to charge a Li-Ion battery. Any power supply or charger that put out over ~14.7 volts open circuit will toast a Li-Ion accessory battery. Find one, like a laptop power supply, that puts out the _correct_ voltage. Also, leaving a switch on overnight accidentally will drain the accessory battery to zero, which will also result in the demise of a 12 volt Li_ion accessory battery. Good to have an LED tail light or dash indicator light that lets everyone know that the 12 volts is "on". Best of luck! Bill D. On 6/5/2016 1:20 PM, Casey Mynott via EV wrote: Hey all! A historic day for the Shock and Awe racing team from Bothell Washington and the world of drag racing! After sitting in gridlock and sweltering heat on the #1 towards Mission Raceway, I arrived just as the track was doing lunch. All in all it was an amazing day with some serious excitement (a 9.589 second 152 MPH run) and a bit of a turn at the end of the day. During run #2 the 16 volt AGM (which was changed out for a faltering 16v lithium pack of headway cells) ran out just as the team was pulling up to the line. So, yesterday ended in a somber moment of reflection. A good reminder, racing is a tough sport, physically, mentally, emotionally, financially, all of the above! The team is at the track today hoping to get in another run, depending on how that goes possibly a second. For now, enjoy the video! :) https://www.youtube.com/watch?v=L53JTDnmj_w Cheers! Casey -- View this message in context: http://electric-vehicle-discussion-list.413529.n4.nabble.com/Shock-an d-Awe-Historic-run-9-589-Seconds-152-MPH-tp4682360.html Sent from the Electric Vehicle Discussion List mailing list archive at Nabble.com. ___ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub http://lists.evdl.org/listinfo.cgi/ev-evdl.org Read EVAngel's EV News at http://evdl.org/evln/ Please discuss EV drag racing at NEDRA ( http://groups.yahoo.com/group/NEDRA) _
Re: [EVDL] Current limiting
Mike Nickerson via EV wrote: If the long term current draw will be less than 10A or so, you could use an in rush limiting resistor. That is a resistor with a negative temperature coefficient. When cool, they have a very high resistance. As they heat up, their resistance drops. This is probably the opposite of the function Gary wants. Inrush limiters have a very LOW resistance initially, so the peak current when you first connect the batteries is very high. As the inrush limiter heats up, its resistance rises -- so you wind up with quite a limited amount of current between them. Gary Krysztopik wrote: Does anyone have any cheap tricks for regularly connecting two large 12 vdc packs together (one stationary and one mobile) and limiting inrush current when they are at different SOC? They both have huge current capability but I need it for energy vs power so one has small wires and fuses. The "cheap trick" is to connect a light bulb between them. Pick the bulb so your normal current is well below what the bulb normally draws on 12v. For example, a #57 brake light draws about an amp, and a headlight about 4 amps, and a halogen spotlight around 10 amps. The bulb won't allow more than its normal rated current to flow between the batteries. If you try, it just lights up. But when the current is less than this (such as while on standby), the bulb's resistance is LOW. The bulb is out, and the two batteries are essentially connected in parallel for float charging, etc. -- "IC chip performance doubles every 18 months." -- Moore's law "The speed of software halves every 18 months." -- Gates' law -- Lee Hart, 814 8th Ave N, Sartell MN 56377, www.sunrise-ev.com ___ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub http://lists.evdl.org/listinfo.cgi/ev-evdl.org Read EVAngel's EV News at http://evdl.org/evln/ Please discuss EV drag racing at NEDRA (http://groups.yahoo.com/group/NEDRA)
Re: [EVDL] Lawn tractor conversion
On 5 Jun 2016 at 0:45, Tom Mandera via EV wrote:
> The motor was ~$600, the battery and accessories another ~$800 IIRC.
> Yes, I could've just bought a new gas tractor (or just kept using the
> gas tractor I already/still have) for less.
>
Or a purpose-built electric tractor! I'm sure you wouldn't get the same
satisfaction or the learning experience you got from conversion, but with
some patience, in that price range you could get a nice used GE Elec-Trac.
For even less scratch, you could get a fixer-upper ET that you could
probably get up and running with a lot less work than conversion.
There were variations in model numbers later in production and with some of
the later manufacturers who licensed the design from GE, but basically there
were 7 models. The ER8-36 riding mower was just that and nothing else. The
E8M light duty tractor with three 12v batteries could also push a dozer
blade for moving snow. The E10M was an E8M with 6v golf car batteries and
could also handle a snow thrower (though the snow throwers that fit are
scarce). The E12 / E12M, E15, and E20 all were larger, had heavier
construction, ran on six golf car batteries, and used golf-car type
resistance speed controllers. These bigger guys accepted a wide range of
attachments including a dozer blade, snow thrower, rear-mounted rototiller,
sickle bar mower, even a hydraulic bucket. As you'd expect, some of these
goodies are hard to find now and can get a bit pricey.
These tractors all had separate motors for drive and for each mower blade.
In the last few months I've seen offers to sell ETs that vary from a pair of
large-frame models (E12 and E15) "in need of work" with a bunch of extras
for $300, to a spiffed-up ("refurbished") E10M for $675.
The most common model is probably the E15. Going price for one with mower
deck in working condition seems to be around $350-500, with nicer examples
in the $600 and up range.
The smaller machines with three 12v marine batteries (ER8-36 and E8M) will
mow around 1 to 1-1/2 acres, depending on terrain and battery condition.
The ones with 6 golf car batteries are good for 2-4 acres. GE claimed up to
5 acres, but I question that.
M-suffix machines and the little ER8-36 rider use belly-mounted mowers. The
others take front-mounted mowers.
If anyone's interested in learning more about ETs, contact me off list, and
I'll hook you up with some resources.
David Roden - Akron, Ohio, USA
EVDL Administrator
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Re: [EVDL] Shock and Awe - Historic run 9.589 Seconds @ 152 MPH!!!
Hi Tom! It's a fantastic project only possible by copious amounts of money! This team and their instructor (Pat Mccue) have literally been working around the clock for the last two years to see this moment come to fruition. And, it_is_amazing! The tires were at 6.5psi with bead locks. No_expense has been avoided in regards to this car being a full on drag racer with top of the line parts. Period. The tires were also measured after each run for their circumference. The Northshore Automotive Technology team has big racing names supporting them. A long list of mentors include Hancock and Lane racing. If you look up their history, the High School race team from Bothell is learning from the top echelon of drag racing teams. Very, very exciting to watch in person! :) http://hancockandlane.com/ Cheers! Casey -- View this message in context: http://electric-vehicle-discussion-list.413529.n4.nabble.com/Shock-and-Awe-Historic-run-9-589-Seconds-152-MPH-tp4682360p4682370.html Sent from the Electric Vehicle Discussion List mailing list archive at Nabble.com. ___ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub http://lists.evdl.org/listinfo.cgi/ev-evdl.org Read EVAngel's EV News at http://evdl.org/evln/ Please discuss EV drag racing at NEDRA (http://groups.yahoo.com/group/NEDRA)
[EVDL] Off-grid solar house and electric car charging
If you build an off-grid solar house and use it for both your house and charging your electric car, are there any disadvantages for using DC current (household appliances can all be converted to DC) and avoiding AC since you are off the grid? You avoid the cost, maintenance, and (slight) inefficiency of inverters, but are there significant disadvantages to this approach? Thanks, -- Larry Gales -- next part -- An HTML attachment was scrubbed... URL: <http://lists.evdl.org/private.cgi/ev-evdl.org/attachments/20160605/ac5420ed/attachment.htm> ___ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub http://lists.evdl.org/listinfo.cgi/ev-evdl.org Read EVAngel's EV News at http://evdl.org/evln/ Please discuss EV drag racing at NEDRA (http://groups.yahoo.com/group/NEDRA)
Re: [EVDL] Current limiting
If the long term current draw will be less than 10A or so, you could use an in rush limiting resistor. That is a resistor with a negative temperature coefficient. When cool, they have a very high resistance. As they heat up, their resistance drops. See an example at: http://www.ebay.com/itm/AS32-2R025-Inrush-Current-Limiters-32mm-2ohms-25A-INRSH-CURR-LIMITER-Ametherm-/291623031556?hash=item43e6165304:g:5B8AAOSwAKxWUum4 Mike On June 5, 2016 2:37:05 PM MDT, Gary Krysztopik via EV wrote: >Does anyone have any cheap tricks for regularly connecting two large 12 >vdc >packs together (one stationary and one mobile) and limiting inrush >current >when they are at different SOC? They both have huge current capability >but >I need it for energy vs power so one has small wires and fuses. > >Thanks, >Gary >-- next part -- >An HTML attachment was scrubbed... >URL: ><http://lists.evdl.org/private.cgi/ev-evdl.org/attachments/20160605/87d17bc5/attachment.htm> >___ >UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub >http://lists.evdl.org/listinfo.cgi/ev-evdl.org >Read EVAngel's EV News at http://evdl.org/evln/ >Please discuss EV drag racing at NEDRA >(http://groups.yahoo.com/group/NEDRA) ___ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub http://lists.evdl.org/listinfo.cgi/ev-evdl.org Read EVAngel's EV News at http://evdl.org/evln/ Please discuss EV drag racing at NEDRA (http://groups.yahoo.com/group/NEDRA)
Re: [EVDL] Dead accessory battery (was: Shock and Awe - Historic run 9.589 Seconds @ 152 MPH!!!)
Hey Bill! I appreciate you commenting! Your knowledge and experience in racing (and many other ventures) is well known and respected! Yes, Pat Mccue and the team are running 800 volts (Dual Reinhart controllers and dual AM Racing motors) and I think (he would have to chime in) that running a DC-DC converter complicated the setup so they opted for an isolated 16v battery. The headway pack (16v accessory battery) they made had seen it's day and was not as healthy as it could have been. They did have a lithium specific charger for the headway pack. So, off to the local parts supplier for a regular old heavy 16 volt racing AGM. Apparently for racing they opt for a 16v battery as due to the heavy loads and ignition systems. I did not know this and learned helping out in the pits. Always something new to know! :) The car is drawing about 40 amps to run all the accessories and pumps. So, it's quite the draw. The team was being pretty careful to charge the 16 volt battery between runs and shutting the battery off while sitting in the staging lanes. It just happened at that point in the day it got lost in the mix. Also, they had not planned on putting in an AGM so did not bring a 16 volt racing charger. Like I mentioned in the pits, well, that's racing! :) The back of the car near the '12v' shut off is an analog style voltage gauge. So, it's pretty easy to see what the 16v accessory battery is doing under changing and draw. Also, it's disconnected from the car when not running. The team has done an amazing job engineering the vehicle. It's quite stunning. Like you mention, this event is something we all go through. I remember with our schools drag truck we had the same problem running a pc680 as our accessory battery and making sure it was topped up after every run. There's nothing more humbling and rewarding than learning from a lived experience! :) Cheers! Casey -- View this message in context: http://electric-vehicle-discussion-list.413529.n4.nabble.com/Shock-and-Awe-Historic-run-9-589-Seconds-152-MPH-tp4682360p4682368.html Sent from the Electric Vehicle Discussion List mailing list archive at Nabble.com. ___ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub http://lists.evdl.org/listinfo.cgi/ev-evdl.org Read EVAngel's EV News at http://evdl.org/evln/ Please discuss EV drag racing at NEDRA (http://groups.yahoo.com/group/NEDRA)
[EVDL] 12v tales
I was CONSTANTLY being stranded in my conversions due to dead 12v. Mostly, from dead DC-DCs. I had GaryK, against his advice, rig a jumper from 4 LFP cells to the lead 12v. Dead 12v? Install the jumper and drive home. Worry about the imbalance later. Once, when my DC-DC was not working, I installed a pair of golf cart batteries in the passenger foot well. I've run the 12v down on my first imiev twice. Both from inadverntly leaving the key on. For those not familiar with imievs, their idiotic design forces one to twist the key against a spring to "crank the engine". Having the key on runs accessories but not the DC-DC. The Tesla has not stranded me with a dead 12v. It warns of impending failure. I'm on my 3rd lead 12v in the Tesla. I have a lithium 12v ready to go in for the 4th. ___ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub http://lists.evdl.org/listinfo.cgi/ev-evdl.org Read EVAngel's EV News at http://evdl.org/evln/ Please discuss EV drag racing at NEDRA (http://groups.yahoo.com/group/NEDRA)
Re: [EVDL] Dead accessory battery... Drill baby drill
ive >> at Nabble.com. >> ___ >> UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub >> http://lists.evdl.org/listinfo.cgi/ev-evdl.org >> Read EVAngel's EV News at http://evdl.org/evln/ Please discuss EV >> drag racing at NEDRA ( >> http://groups.yahoo.com/group/NEDRA) >> >> >> > ___ > UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub > http://lists.evdl.org/listinfo.cgi/ev-evdl.org > Read EVAngel's EV News at http://evdl.org/evln/ Please discuss EV drag > racing at NEDRA ( > http://groups.yahoo.com/group/NEDRA) > > -- Remember, it is not that the glass is half empty, in reality, the glass is merely twice the size that it needs to be! -TNT'82 -- next part -- An HTML attachment was scrubbed... URL: <http://lists.evdl.org/private.cgi/ev-evdl.org/attachments/20160605/81e90a 4d/attachment.htm> ___ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub http://lists.evdl.org/listinfo.cgi/ev-evdl.org Read EVAngel's EV News at http://evdl.org/evln/ Please discuss EV drag racing at NEDRA (http://groups.yahoo.com/group/NEDRA) ___ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub http://lists.evdl.org/listinfo.cgi/ev-evdl.org Read EVAngel's EV News at http://evdl.org/evln/ Please discuss EV drag racing at NEDRA (http://groups.yahoo.com/group/NEDRA)
Re: [EVDL] Shock and Awe - Historic run 9.589 Seconds @ 152 MPH!!!
Congratulations to a great team effort! In the '90s, I was trying to locate a funny car chassis to try something along these lines. Great to see the concept finally coming to the forefront. Again, Congratulations and keep up the great work! Also, it caught my attention when I saw the person holding the tire pressure gaugethat your launch has too much bounce- an indicator of too much pressure in the tires. -Tom True On Sun, Jun 5, 2016 at 12:20 PM, Casey Mynott via EV wrote: > Hey all! > > A historic day for the Shock and Awe racing team from Bothell Washington > and > the world of drag racing! > > After sitting in gridlock and sweltering heat on the #1 towards Mission > Raceway, I arrived just as the track was doing lunch. All in all it was an > amazing day with some serious excitement (a 9.589 second 152 MPH run) and a > bit of a turn at the end of the day. During run #2 the 16 volt AGM (which > was changed out for a faltering 16v lithium pack of headway cells) ran out > just as the team was pulling up to the line. So, yesterday ended in a > somber > moment of reflection. A good reminder, racing is a tough sport, physically, > mentally, emotionally, financially, all of the above! > > The team is at the track today hoping to get in another run, depending on > how that goes possibly a second. > > For now, enjoy the video! :) > > > https://www.youtube.com/watch?v=L53JTDnmj_w > > > Cheers! > > Casey > > -- > View this message in context: > http://electric-vehicle-discussion-list.413529.n4.nabble.com/Shock-and-Awe-Historic-run-9-589-Seconds-152-MPH-tp4682360.html > Sent from the Electric Vehicle Discussion List mailing list archive at > Nabble.com. > ___ > UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub > http://lists.evdl.org/listinfo.cgi/ev-evdl.org > Read EVAngel's EV News at http://evdl.org/evln/ > Please discuss EV drag racing at NEDRA ( > http://groups.yahoo.com/group/NEDRA) > > -- Remember, it is not that the glass is half empty, in reality, the glass is merely twice the size that it needs to be! -TNT'82 ------ next part -- An HTML attachment was scrubbed... URL: <http://lists.evdl.org/private.cgi/ev-evdl.org/attachments/20160605/6682f612/attachment.htm> ___ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub http://lists.evdl.org/listinfo.cgi/ev-evdl.org Read EVAngel's EV News at http://evdl.org/evln/ Please discuss EV drag racing at NEDRA (http://groups.yahoo.com/group/NEDRA)
Re: [EVDL] Current limiting
A switchmode charger or a big resistor. I have used radiator elements and light bulbs. One solution is expensive and efficient the other isn't. jsl John Lindsay > On 6 Jun 2016, at 6:07 AM, Gary Krysztopik via EV wrote: > > Does anyone have any cheap tricks for regularly connecting two large 12 vdc > packs together (one stationary and one mobile) and limiting inrush current > when they are at different SOC? They both have huge current capability but > I need it for energy vs power so one has small wires and fuses. > > Thanks, > Gary > -- next part -- > An HTML attachment was scrubbed... > URL: > <http://lists.evdl.org/private.cgi/ev-evdl.org/attachments/20160605/87d17bc5/attachment.htm> > ___ > UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub > http://lists.evdl.org/listinfo.cgi/ev-evdl.org > Read EVAngel's EV News at http://evdl.org/evln/ > Please discuss EV drag racing at NEDRA (http://groups.yahoo.com/group/NEDRA) > ___ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub http://lists.evdl.org/listinfo.cgi/ev-evdl.org Read EVAngel's EV News at http://evdl.org/evln/ Please discuss EV drag racing at NEDRA (http://groups.yahoo.com/group/NEDRA)
Re: [EVDL] Dead accessory battery (was: Shock and Awe - Historic run 9.589 Seconds @ 152 MPH!!!)
Hi Bill, I have to heartily agree that the dead accessory battery happens to everyone at one time or another (Murphy dictates how difficult the timing will be). I recall that we developed the habit of having at least one back up battery just for such a situation. We usually had a couple of the Hawker Genesis batteries on hand for replacements on Father Time's drag bikes, so it wasn't too inconvenient after the first time. -Tom True On Sun, Jun 5, 2016 at 3:04 PM, Bill Dube via EV wrote: > A dead 12 volt accessory battery has happened at one point or another to > everyone. > > We typically run a small DC-to-DC converter to keep the accessory battery > topped up, just to avoid the dreaded flat accessory battery. > You absolutely _must_ have a 12 volt accessory battery, but a DC-DC that > runs whenever the vehicle is "on" increases the reliability a great deal. > Small expense, but is good insurance against forgetting to charge the 12 > volt, which is easy to forget in the excitement of race day. (Ask me how I > know. :-) ) > > We use a Vicor DC-DC converter module (or more than one in parallel) like > this one: > http://www.ebay.com/itm/201199082834 > You might choose a different model, (like a VE-j72-CY) depending on your > main pack voltage and your wattage needs. You should get a 15 volt output > and trim it down to ~13.5 volts (read the data sheet). If you get one with > 12 volt output, it won't charge a 12 volt battery because it really puts > out exactly 12.0 volts. > > I don't know who originally said it but, "To finish first, one must first > finish." > > I'm guessing, but you probably used a portable "12 volt" battery charger > to recharge your Li-Ion "12 volt" accessory battery. That is likely what > ruined it. Almost without exception, the open circuit voltage of all > portable "12 volt battery chargers" is greater than 15 volts, (often as > high as 17 volts) which is a death sentence for a "12 volt" Li-Ion pack. > Always measure the open circuit voltage, with a voltmeter, on a battery > charger before you use it to charge a Li-Ion battery. Any power supply or > charger that put out over ~14.7 volts open circuit will toast a Li-Ion > accessory battery. Find one, like a laptop power supply, that puts out the > _correct_ voltage. > > Also, leaving a switch on overnight accidentally will drain the accessory > battery to zero, which will also result in the demise of a 12 volt Li_ion > accessory battery. Good to have an LED tail light or dash indicator light > that lets everyone know that the 12 volts is "on". > > Best of luck! > > Bill D. > > On 6/5/2016 1:20 PM, Casey Mynott via EV wrote: > >> Hey all! >> >> A historic day for the Shock and Awe racing team from Bothell Washington >> and >> the world of drag racing! >> >> After sitting in gridlock and sweltering heat on the #1 towards Mission >> Raceway, I arrived just as the track was doing lunch. All in all it was an >> amazing day with some serious excitement (a 9.589 second 152 MPH run) and >> a >> bit of a turn at the end of the day. During run #2 the 16 volt AGM (which >> was changed out for a faltering 16v lithium pack of headway cells) ran out >> just as the team was pulling up to the line. So, yesterday ended in a >> somber >> moment of reflection. A good reminder, racing is a tough sport, >> physically, >> mentally, emotionally, financially, all of the above! >> >> The team is at the track today hoping to get in another run, depending on >> how that goes possibly a second. >> >> For now, enjoy the video! :) >> >> >> https://www.youtube.com/watch?v=L53JTDnmj_w >> >> >> Cheers! >> >> Casey >> >> -- >> View this message in context: >> http://electric-vehicle-discussion-list.413529.n4.nabble.com/Shock-and-Awe-Historic-run-9-589-Seconds-152-MPH-tp4682360.html >> Sent from the Electric Vehicle Discussion List mailing list archive at >> Nabble.com. >> ___ >> UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub >> http://lists.evdl.org/listinfo.cgi/ev-evdl.org >> Read EVAngel's EV News at http://evdl.org/evln/ >> Please discuss EV drag racing at NEDRA ( >> http://groups.yahoo.com/group/NEDRA) >> >> >> > ___ > UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub > http://lists.evdl.org/listinfo.cgi/ev-evdl.org > Read EVAngel's EV News at http://evdl.org/evln/ > Please discuss EV drag racing at NEDRA ( > http://groups.yahoo.com/group/NED
[EVDL] Dead accessory battery (was: Shock and Awe - Historic run 9.589 Seconds @ 152 MPH!!!)
A dead 12 volt accessory battery has happened at one point or another to everyone. We typically run a small DC-to-DC converter to keep the accessory battery topped up, just to avoid the dreaded flat accessory battery. You absolutely _must_ have a 12 volt accessory battery, but a DC-DC that runs whenever the vehicle is "on" increases the reliability a great deal. Small expense, but is good insurance against forgetting to charge the 12 volt, which is easy to forget in the excitement of race day. (Ask me how I know. :-) ) We use a Vicor DC-DC converter module (or more than one in parallel) like this one: http://www.ebay.com/itm/201199082834 You might choose a different model, (like a VE-j72-CY) depending on your main pack voltage and your wattage needs. You should get a 15 volt output and trim it down to ~13.5 volts (read the data sheet). If you get one with 12 volt output, it won't charge a 12 volt battery because it really puts out exactly 12.0 volts. I don't know who originally said it but, "To finish first, one must first finish." I'm guessing, but you probably used a portable "12 volt" battery charger to recharge your Li-Ion "12 volt" accessory battery. That is likely what ruined it. Almost without exception, the open circuit voltage of all portable "12 volt battery chargers" is greater than 15 volts, (often as high as 17 volts) which is a death sentence for a "12 volt" Li-Ion pack. Always measure the open circuit voltage, with a voltmeter, on a battery charger before you use it to charge a Li-Ion battery. Any power supply or charger that put out over ~14.7 volts open circuit will toast a Li-Ion accessory battery. Find one, like a laptop power supply, that puts out the _correct_ voltage. Also, leaving a switch on overnight accidentally will drain the accessory battery to zero, which will also result in the demise of a 12 volt Li_ion accessory battery. Good to have an LED tail light or dash indicator light that lets everyone know that the 12 volts is "on". Best of luck! Bill D. On 6/5/2016 1:20 PM, Casey Mynott via EV wrote: Hey all! A historic day for the Shock and Awe racing team from Bothell Washington and the world of drag racing! After sitting in gridlock and sweltering heat on the #1 towards Mission Raceway, I arrived just as the track was doing lunch. All in all it was an amazing day with some serious excitement (a 9.589 second 152 MPH run) and a bit of a turn at the end of the day. During run #2 the 16 volt AGM (which was changed out for a faltering 16v lithium pack of headway cells) ran out just as the team was pulling up to the line. So, yesterday ended in a somber moment of reflection. A good reminder, racing is a tough sport, physically, mentally, emotionally, financially, all of the above! The team is at the track today hoping to get in another run, depending on how that goes possibly a second. For now, enjoy the video! :) https://www.youtube.com/watch?v=L53JTDnmj_w Cheers! Casey -- View this message in context: http://electric-vehicle-discussion-list.413529.n4.nabble.com/Shock-and-Awe-Historic-run-9-589-Seconds-152-MPH-tp4682360.html Sent from the Electric Vehicle Discussion List mailing list archive at Nabble.com. ___ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub http://lists.evdl.org/listinfo.cgi/ev-evdl.org Read EVAngel's EV News at http://evdl.org/evln/ Please discuss EV drag racing at NEDRA (http://groups.yahoo.com/group/NEDRA) ___ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub http://lists.evdl.org/listinfo.cgi/ev-evdl.org Read EVAngel's EV News at http://evdl.org/evln/ Please discuss EV drag racing at NEDRA (http://groups.yahoo.com/group/NEDRA)
[EVDL] Current limiting
Does anyone have any cheap tricks for regularly connecting two large 12 vdc packs together (one stationary and one mobile) and limiting inrush current when they are at different SOC? They both have huge current capability but I need it for energy vs power so one has small wires and fuses. Thanks, Gary -- next part -- An HTML attachment was scrubbed... URL: <http://lists.evdl.org/private.cgi/ev-evdl.org/attachments/20160605/87d17bc5/attachment.htm> ___ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub http://lists.evdl.org/listinfo.cgi/ev-evdl.org Read EVAngel's EV News at http://evdl.org/evln/ Please discuss EV drag racing at NEDRA (http://groups.yahoo.com/group/NEDRA)
[EVDL] Shock and Awe - Historic run 9.589 Seconds @ 152 MPH!!!
Hey all! A historic day for the Shock and Awe racing team from Bothell Washington and the world of drag racing! After sitting in gridlock and sweltering heat on the #1 towards Mission Raceway, I arrived just as the track was doing lunch. All in all it was an amazing day with some serious excitement (a 9.589 second 152 MPH run) and a bit of a turn at the end of the day. During run #2 the 16 volt AGM (which was changed out for a faltering 16v lithium pack of headway cells) ran out just as the team was pulling up to the line. So, yesterday ended in a somber moment of reflection. A good reminder, racing is a tough sport, physically, mentally, emotionally, financially, all of the above! The team is at the track today hoping to get in another run, depending on how that goes possibly a second. For now, enjoy the video! :) https://www.youtube.com/watch?v=L53JTDnmj_w Cheers! Casey -- View this message in context: http://electric-vehicle-discussion-list.413529.n4.nabble.com/Shock-and-Awe-Historic-run-9-589-Seconds-152-MPH-tp4682360.html Sent from the Electric Vehicle Discussion List mailing list archive at Nabble.com. ___ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub http://lists.evdl.org/listinfo.cgi/ev-evdl.org Read EVAngel's EV News at http://evdl.org/evln/ Please discuss EV drag racing at NEDRA (http://groups.yahoo.com/group/NEDRA)
[EVDL] EVent: EV rides @Experience Day 10a-4p 6/8 Bentwaters_Parks.uk
http://www.buryfreepress.co.uk/news/local/motorists-in-suffolk-charged-up-for-electric-vehicle-day-1-7414723
Motorists in Suffolk charged up for electric vehicle day
03 June 2016 Paul Grinnell
[image] The Tesla Model S
Motorists in Suffolk are being offered the chance to get into the driving
seat of a new move to encourage more use of electric powered vehicles.
Electric Vehicle Experience Day will showcase a range of electric cars -
including the Tesla Model S - and give drivers a chance to put the vehicles
through their paces on a 1.2 mile track.
"Through this event we hope to dispel some of these myths and highlight the
benefits of green motoring." -Charlie Jardine, chief executive
It is being staged by renewable energy specialists East Green Energy with
Suffolk-based EO Charging, a manufacturer of domestic and business electric
vehicle chargers.
Supported by six of the region’s leading car dealers, the event will take
place at Bentwaters Parks, Rendlesham, near Woodbridge on June 8.
Guests will be able to see and drive the latest electric cars from Renault,
Nissan, BMW, Toyota and Kia, as well as the Tesla Model S, which is capable
of accelerating to 60mph in just 2.8 seconds.
EO Charging chief executive and founder Charlie Jardine said: “This event is
a fantastic way to encourage the uptake of electric vehicles, by giving
people the opportunity to test drive them on a track.
“Electric vehicles are becoming increasingly popular with consumers and
businesses, although some people are still concerned about viability.
“Through this event we hope to dispel some of these myths and highlight the
benefits of green motoring.”
Sales of electric vehicles are increasing by 500 per cent year-on-year, with
about two million expected to be on the roads by 2020.
Sessions for private motorists and business users on the day are free and
will take place between 10am and 4pm. Anyone interested in taking part
should [RSVP] email caroline.freeman @eocharging.com with name, company
name, contact number and indicating morning or afternoon preference.
Electric vehicles can offer financial benefits, with fuel starting at 2p per
mile, plus no road tax or congestion charge.
Company car tax is five per cent rather than 20 per cent and there are
currently government incentives of up to £4,500 off the cost of the vehicle
and £500 off the cost of a charging point at home.
[© 2016 Johnston Publishing]
http://www.greensuffolk.org/events/electric-vehicle-experience-day/
Electric Vehicle Experience Day
Date: 8 June 2016
Time: 10:00
Location: Bentwaters Parks, IP12 2TW
Want to know more about Electric vehicles…Come to our Electric Vehicle
Experience Day at Bentwaters Parks and try them out for yourself.
The aim of the day is to allow you to see the increasing range of EVs
available and to experience driving them and assess their performance for
yourself.
East Green Energy is passionate about Renewable Energy and C02 reduction and
we know our customers are too.
The natural next step from generating your own power with solar PV is
self-consumption; we are always looking at ways to help you save, store and
conserve power and will be on hand to discuss all new technologies.
We will have the latest EV and hybrid cars for you to see and test. So you
can make your own mind up. This is a unique event aimed at anyone who is
ready to find out more about Electric Vehicles (EVs) or has one and is
looking to try out the next models.
The day will be split into 2 sessions 10am-1pm or 1pm -4pm
[© One Suffolk]
http://www.eastgreenenergy.co.uk/ev-electric-vehicle-experience-day-at-bentwaters-parks/
EV-Electric Vehicle Experience day at Bentwaters Parks
May 5, 2016
Want to know more about Electric vehicles…Come to our Electric Vehicle
Experience Day at Bentwaters Parks and try them out for yourself ...
EO Car Charging will also be available with details of their home charge and
business charge units ...
Please contact us by email [ RSVP
http://www.eastgreenenergy.co.uk/contact/
] as soon as possible if you wish to attend, places are expected to fill
very fast.
[© 2016 East Green Energy]
...
http://www.bentwatersparks.com/siteplan
Bentwaters Park siteplan
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[EVDL] EVLN: EV-newswire posts for 20160605
http://electric-vehicle-discussion-list.413529.n4.nabble.com/EVLN-Buy-the-EV-before-installing-the-PV-roof-td4682354.html
EVLN: Buy the EV before installing the PV roof(?)
Put electric cars before solar panels: forum
... Leaf was selling new in New Zealand for ... climate change impact of
EVs for New Zealand than solar PV earlier ...
http://electric-vehicle-discussion-list.413529.n4.nabble.com/EVLN-EU-Leaf-EV-factory-uk-is-powered-by-4-75MW-solar-farm-amp-10-wind-turbines-td4682355.html
EVLN: EU Leaf EV factory.uk is powered by 4.75MW solar farm & 10 wind
turbines
UK: Nissan switches on 4.75 MW solar farm to power electric vehicle ...
... The Nissan car plant now boasts a 4.75 MW solar array, 6.6 MW of ...
The company's ultimate aim is to produce 100% zero emission ...
http://electric-vehicle-discussion-list.413529.n4.nabble.com/EVLN-Bahn-de-Rail-Integrates-EVs-as-Consumers-Shift-Away-From-Train-Travel-td4682356.html
EVLN: Bahn.de Rail Integrates EVs as Consumers Shift Away From Train Travel
German Railway Company Adds Electric Car Rental Option To Ticket
It has become one of the country's top car-sharing services. Bahn currently
works with a fleet of 700 electric cars through its subsidiary Flinkster.
Now, they are ...
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[EVDL] EVLN: Buy the EV before installing the solar roof(?)
http://www.nzherald.co.nz/business/news/article.cfm?c_id=3&objectid=11650319
Put electric cars before solar panels: forum
Jun 4, 2016 Pattrick Smellie
[image] Jaguar Land Rover installs UK's largest rooftop solar panel array.
The extra expense of an electric vehicle roughly equates to the cost of
installing roof-top solar electricity generation, making it a better
investment for environmental outcomes, says John Hancock, the head of the
Smart Grid Forum.
The forum, a future-casting electricity industry group established by the
Ministry of Business, Innovation and Employment, has released a new report
on how internet-enabled electricity management might shape the sector's
future.
"While installing solar panels on your house may mean cheaper power bills,
which may be great for the individual consumer, it isn't really doing
anything to reduce New Zealand's carbon emissions," he said.
"On the other hand, buying an EV instead of a diesel or petrol-powered car
has a clear impact.
"EVs are still quite expensive, but the amount someone would normally spend
on installing solar roughly covers the additional cost of an EV over a new
petrol or diesel car," Hancock said.
"From a national perspective, we'd reduce emissions more if people bought
EVs rather than installing solar."
Rooftop solar PV typically cost around [AUD]$10,000 to install, while the
cost of a plug-in ... is around $12,000 more than the cost of a petrol or
diesel model, he said.
The electric-only Nissan Leaf [EV] was selling new in New Zealand for around
$35,000 before Nissan withdrew it from sale in this market late last year,
compared to similarly outfitted petrol and diesel cars at between $20,000
and $30,000.
The conclusion is likely to dismay solar PV enthusiasts who tout the
technology not only as a money-saving but a planet-saving move to reduce
carbon emissions - a claim that's more meaningful in a country such as
Australia, where the vast majority of electricity is produced from fossil
fuels, such as natural gas and coal.
With 80 per cent-plus renewable electricity already from hydro, wind and
geothermal resources, "solar PV uptake is unlikely to result in
significantly better or worse outcomes (for national carbon emissions) than
would be achieved otherwise," says the report, which draws on a range of
recent studies, including the Concept Consulting report that first drew
attention to the greater climate change impact of EVs for New Zealand than
solar PV earlier this year, provoking outrage in the fledgling solar PV
sector.
"To achieve emission savings, solar PV would not only need to increase the
penetration of renewable generation, but it would need to do so more than
the renewable generation projects that it would likely displace," the report
says. "While solar PV is not an ineffective option for reducing emissions,
other technologies such as wind would be more effective."
[© 2016 NZME nzherald.co.nz]
...
http://www.mbie.govt.nz/info-services/sectors-industries/energy/electricity-market/nz-smart-grid-forum/forum-establishment
The forum
https://www.facebook.com/MBIEgovtNZ/
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[EVDL] Hmmm... Since this is a downhill course...
…this may be a glorified soapbox racer, but: http://www.gizmag.com/team-eximus-1-2016-delsbo-electric/43603/ -Bill -- next part -- A non-text attachment was scrubbed... Name: signature.asc Type: application/pgp-signature Size: 801 bytes Desc: Message signed with OpenPGP using GPGMail URL: <http://lists.evdl.org/private.cgi/ev-evdl.org/attachments/20160605/c418a264/attachment.pgp> ___ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub http://lists.evdl.org/listinfo.cgi/ev-evdl.org Read EVAngel's EV News at http://evdl.org/evln/ Please discuss EV drag racing at NEDRA (http://groups.yahoo.com/group/NEDRA)
