Re: [EVDL] Solar off grid with an EV?

[Michael Ross via EV]

I get all that because I have panels and a net metering plan with Duke
Power. As I said it depends on whether your utility supports what you want
to do. Clearly, YMMV.

I personally could do exactly as I described.  If I had an EV that needed
charging regularly, I could put up a ground based array of microinverter
120VAC output arrays, and add to them pretty much at will. If I over
produced then Duke would bank it. In the billing month that contains May 31
they would zero out any bank I had developed. I could live with that.


Virus-free.
www.avg.com

<#DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2>

On Sat, Jul 13, 2019 at 7:06 PM Mr. Sharkey via EV 
wrote:

>  >>We're going back to the way intertie started off decades ago.  The
> utilities
> imposed impossible technical and insurance requirements on net metering,
> which led PV hobbyists to start the Guerrilla Solar movement -- essentially
> doing grid intertie on the sly.
>
> This is veering around and nearly clipping the Off-Topic guardrails,
> but because you brought it up:
>
> At least one to-be-left-unnamed EV driver and solar enthusiast was
> guilty of participating in that clandestine program:
>
> http://www.westlanetv.org/~sharkey/gsolar.pdf
>
> And here's what happens when the utility figures it out:
>
> http://www.westlanetv.org/~sharkey/Amnesty_for_Solar_Guerrillas.pdf
>
> (see lower right of first page, and upper left of second)
>
> I, er this guy, got off easy, they could just as easily sic'ed the
> County permit and inspection authority on me, uh, him, threatened
> utility power disconnect, or applied other punitive sanctions such as
> a retroactive energy charge of their own estimation. In the end , all
> the utility wanted was to stop being annoyed by the alarms and alerts
> in the new software program that they were running to administer the
> smart meter program for 79,000 customers.
>
> Before I go, R.I.P. to friends Richard and Karen Perez, and goodbye
> to Home Power Magazine, which ceased publication in October of 2018.
>
> 
> Drink This Before Bed, Watch Your Body Fat Melt Like Crazy
> Diet Insider
> http://thirdpartyoffers.juno.com/TGL3131/5d2a63e484ff63da646est01vuc
> ___
> UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub
> http://lists.evdl.org/listinfo.cgi/ev-evdl.org
> Please discuss EV drag racing at NEDRA (
> http://groups.yahoo.com/group/NEDRA)
>
>

-- 
Michael E. Ross
(919) 585-6737 Land
(919) 901-2805 Cell and Text
(919) 576-0824  Tablet,
Google Phone and Text
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[EVDL] follow-up (v): EVent: EV test drives 7/13 10a-4p @NV Energy Reno-NV

[brucedp5 via EV]

https://www.kolotv.com/content/news/NV-Energy-and-NDOT-host-electric-vehicle-driving-event-512685961.html
NV Energy and NDOT host electric vehicle driving event
Jul 13, 2019  NV Energy and NDOT host electric vehicle driving event ...
RENO, NV (KOLO) - Dozens of people crowded the NV Energy parking lot
Saturday morning. The event was hosted by NV Energy and Nevada Department of
Transportation. People tested out Teslas, BMW's, and Mitsubishi products ...
(video  flash)

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[EVDL] Seres(sfmotors) EV.cn lays off 90 in Silicon_Valley-CA

[brucedp5 via EV]

https://www.theverge.com/2019/7/10/20689610/chinese-ev-startup-seres-halts-us-launch-layoff-sf5-90-people-silicon-valley
Chinese EV startup Seres halts US launch, lays off 90 people in Silicon
Valley
Jul 10, 2019  Sean O'Kane@sokane1

[image  
https://cdn.vox-cdn.com/thumbor/6tWzKy_uZkkilprcqCNrdiszZdc=/0x0:1600x960/920x613/filters:focal(672x352:928x608):format(webp)/cdn.vox-cdn.com/uploads/chorus_image/image/64703508/sfmotors_sf5_1.0.jpg
Image: SF Motors/Seres
]

The company cited the slowdown in China’s car market as a reason

Seres, the Chinese EV startup formerly known as SF Motors, is laying off 90
people in its Silicon Valley office, the company announced in a staff
meeting held earlier today. The US launch of its first electric SUV, the
SF5, is also now on hold, according to a recording of the meeting obtained
by The Verge. It had originally planned to make and sell its electric SUVs
in both China and the US, with a release slated for later this year.

Around 300 people worked in the Silicon Valley office prior to the layoffs,
according to a former employee who was granted anonymity because of a
non-disclosure agreement with the company. The layoffs affect multiple parts
of the company, including sales, marketing, IT, HR, legal, operations, and
design, this person said. A spokesperson for the company could not
immediately be reached for comment.

"The layoffs were sweeping and affected nearly half the US office"

The layoffs come at a time when some of the most high profile Chinese and
Chinese-American EV startups are struggling. Faraday Future has lost most of
its workforce and partnered with a restructuring firm to bring in new money.
NIO, a company which is currently selling cars in China and is publicly
traded in the US, recently delayed an upcoming car, and cut dozens of jobs
in Silicon Valley and closed an office there [
https://www.theverge.com/2019/5/2/18526825/nio-electric-car-ev-layoffs-silicon-valley-office
] after a slow few months of sales. It also had to recall thousands of
vehicles [
https://www.theverge.com/2019/6/27/18761067/nio-es8-electric-suv-recall-battery-fires-china
] due to a fire risk.

Seres is a US brand owned by Chinese commercial automaker Sokon, and its US
arm will remain open despite the layoffs, though it will become more
independent, managing its own budget and goals, per the meeting. A letter
from co-CEO James Taylor that was read at the meeting cited the recent
downturn in the Chinese economy, but especially the new car market, as a
major reason for the changes. The ongoing trade war with the US was also
cited as a reason.

“At a time when Sokon is managing so many dynamic challenges, it is simply
too much in the short term to also attempt to launch a new brand and product
type in another new market,” Taylor’s letter reads. “With these strategic
decisions made, we must now make appropriate adjustments to give the company
its best opportunity for both short-term survival and long-term success.”

Seres made some waves as SF Motors when it acquired a startup founded by
Martin Eberhard, a co-founder and former CEO Tesla, in 2017, though he has
since left the company. It also made headlines when it hired Taylor, who had
served as chief marketing officer of Cadillac and CEO of Hummer.
[© theverge.com]


+ (sfmotors layoffs= funding.cn)
https://www.southbendtribune.com/news/local/layoffs-announced-at-mishawaka-electric-vehicle-plant/article_a8b48416-532d-5385-8b51-dd9cc881561e.html
Layoffs announced at Mishawaka electric vehicle plant
2019-07-13  MISHAWAKA — Layoffs ... two days after the electric vehicle
company's CEO announced ... suspension of work to develop the SF5, an
electric vehicle that would’ve been sold to U.S. consumers ... SF Motors, a
subsidiary of Chinese auto manufacturer Sokon, rebranded as Seres Automotive
earlier this year and had been working to retool the plant to assemble
electric vehicles ...
...
https://www.goshennews.com/news/business/company-suspends-plans-for-indiana-built-electric-vehicle/article_adf421cd-190b-5150-8c0a-ced33d1f427b.html
Jul 12, 2019  MISHAWAKA, Ind. — An electric vehicle startup has halted plans
to start production at a northern Indiana factory where it aimed to employ
more than 450 workers. The subsidiary of Chinese automaker Sokon ...




For EVLN EV-newswire posts use:
 http://evdl.org/archive/


{brucedp.neocities.org}

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[EVDL] Eve the Tesla-3 EV on 2mo cover-the-continent road-trip

[brucedp5 via EV]

https://www.cbc.ca/news/canada/hamilton/electric-car-roadtrip-america-1.5201763
Can an electric car cover the continent? This man is driving 25,000 km to
find out
Jul 07, 2019  Haydn Watters

[images  
https://i.cbc.ca/1.5202279.1562363722!/fileImage/httpImage/image.JPG_gen/derivatives/original_780/wade-anderson-inside-his-tesla-driving.JPG
Wade Anderson hopes to cover 32 states, 5 provinces and territories in 2
months ... the middle of an epic two-month road trip to extreme points
around North America in his Tesla. He hopes to hit 32 states and five
provinces and territories. (Haydn Watters/CBC)

https://i.cbc.ca/1.5202042.1562357393!/fileImage/httpImage/image.jpg_gen/derivatives/original_780/wade-anderson-extreme-points-around-the-u-s.jpg
 map  Anderson has plotted out this map of extreme points around the
continent. He expects it will take him about two months to do and he will
drive more than 25,000 km. (CBC)


audio
http://www.cbc.ca/player/play/1563337283967/
Meet the man road tripping to North America's extremes — by electric car 
Wade Anderson is in the middle of a two month epic road trip to extreme
points around North America in his Tesla. Haydn Watters caught up with him
in Woodstock, Ontario. 4:04
]

Wade Anderson is hoping to drive to North America's most extreme points.
That is, if he can keep his car charged.

The Tucson, Ariz., man is three weeks into a two-month road trip around the
continent in his electric car, a Tesla Model 3. He left from Tucson last
month and has already hit the southernmost and easternmost points in the
continental U.S. — with many more "extremes" in his sights. 

"I'm just going on a journey," he said at a pit stop in Woodstock, Ont., 16
days into his trip. "It's important to get out there and just live life and
have these experiences."

Just how far he can get — and how fast — all depends on charging though.

Finding electric vehicle charging is not a problem in big cities and heavily
populated areas. But Anderson knows it will be an issue as he gets to more
remote locations. After all, he's attempting to get to Prudhoe Bay, Alaska,
the northermost point you can drive to in the U.S.

To get there, he's headed through Canada. He's still figuring out how
charging will work that far north.

"Whitehorse has a charger somewhere there, it's a public charger," he said.
"But after that, I don't know yet."
Ontario Morning from CBC Radio

'We're not quite there yet'

It's called "range anxiety" — that nagging worry about running out of fuel,
or in this case, a charge. 

He said the best place to recharge Teslas is at stations known as
superchargers. They charge the vehicles the fastest and give the most range.
But there are no superchargers in all of Alaska.

Other plugs work too, but they are a lot slower to charge. A standard
120-volt outlet only gives about eight km of range per hour of charging, not
ideal given Anderson plans to drive more than 25,000 km in just two months.
It's a problem in Canada too, where superchargers are scant in parts of the
country.

[image]  Anderson will schedule meet ups at superchargers ?— or just
spontaneously meet people there along the way. 'I’ve met people I would
never meet normally because they are from a different realm.' (Haydn
Watters/CBC)

If you're on a cross-country drive, there currently aren't any superchargers
between Sudbury and Fort MacLeod, Alta., a 2,900-km distance. Tesla is
planning on opening several along this route sometime later this year.

John Dixon, president and founder of the Tesla Owners Club of Ontario, said
there are more chargers than before, but acknowledges there is still work to
do.

"We're not quite there yet," he said. He notes that it becomes even more
complicated in the Canadian winter, when cold weather lowers an electric
vehicle's range.

[image]  Anderson takes a look at his supercharger options. While the U.S.
has plenty, his options in Canada are more scant. (Haydn Watters/CBC)

Dixon said long-distance trips like Anderson's are doable.

"You just have to plan it out and you just have to be willing to wait a bit
longer."
'Don't want to have a lot of regrets'

This is far from Anderson's first adventure — he once rode a bike from Key
West, Fla., to Alaska. He's a physiotherapist in Arizona, where he works six
days a week for 10 months so he can take two months off to do this kind of
trip. 

The journey takes him through 32 states and into five provinces and
territories.

"I'm hoping to be done in two months. That's what I've budgeted for and
that's still a stretch, because especially hotels get very expensive," he
said.

Anderson is driving alone, but has stopped to visit old friends and new ones
— he meets up with people he discovers on Twitter at superchargers along the
route. He's got multiple cameras strapped up inside his car so he can
document his travels and post videos online.

[image]  Anderson named his car Eve, after the female robot in the animated
movie Wall-E. 'It’s a white car and 

[EVDL] EV Heat Pump

[Daniel Eyk via EV]

Somewhere in a past EVDL post, I remember reading about members using a 12
volt model, but don't know when I read it.

I tried looking at some past posts that I had saved, but couldn't find
anything.

I am looking to use one in my S10 conversion and also an off-grid type of
situation for my son to cool his office which gets
extremely hot at times.
Can someone recommend a make/model that would work in either or both
situations?

I hope that this post gets posted as I have not had very good luck in
getting anything posted. I really am looking for some
help with this question. Thanks, Dan Eyk
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Re: [EVDL] Solar off grid with an EV?

[John Lussmyer via EV]

On Fri Jul 12 22:13:25 PDT 2019 ev@lists.evdl.org said:
>Well, if "simple" is what you want, the simplest way is a rotary
>converter (motor-generator). Use your solar power to run a DC motor. Use
>the motor to drive an AC alternator. The alternator can produce
>essentially perfect 60Hz sinewave power; good enough so nothing you plug
>in (including your electric car charger) can tell the difference.

Hmm, I coud actually do that with my conversion.
Just need a good RPM speed control, and belt drive to an AC generator head.



--

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Re: [EVDL] Solar off grid with an EV?

[Mr. Sharkey via EV]

>>We're going back to the way intertie started off decades ago.  The 
utilities

imposed impossible technical and insurance requirements on net metering,
which led PV hobbyists to start the Guerrilla Solar movement -- essentially
doing grid intertie on the sly.

This is veering around and nearly clipping the Off-Topic guardrails, 
but because you brought it up:


At least one to-be-left-unnamed EV driver and solar enthusiast was 
guilty of participating in that clandestine program:


http://www.westlanetv.org/~sharkey/gsolar.pdf

And here's what happens when the utility figures it out:

http://www.westlanetv.org/~sharkey/Amnesty_for_Solar_Guerrillas.pdf

(see lower right of first page, and upper left of second)

I, er this guy, got off easy, they could just as easily sic'ed the 
County permit and inspection authority on me, uh, him, threatened 
utility power disconnect, or applied other punitive sanctions such as 
a retroactive energy charge of their own estimation. In the end , all 
the utility wanted was to stop being annoyed by the alarms and alerts 
in the new software program that they were running to administer the 
smart meter program for 79,000 customers.


Before I go, R.I.P. to friends Richard and Karen Perez, and goodbye 
to Home Power Magazine, which ceased publication in October of 2018.



Drink This Before Bed, Watch Your Body Fat Melt Like Crazy
Diet Insider
http://thirdpartyoffers.juno.com/TGL3131/5d2a63e484ff63da646est01vuc
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Re: [EVDL] Solar off grid with an EV?

[Robert Bruninga via EV]

Amen!
If your state has good net-metering laws SIGN UP NOW!
Before the fossil fuel and big utilities and lobbyists get laws passed to
protect their monopolies like they did in Florida.

Solar is dirt cheap in states with good net metering agreements, but
blocked by the utilities and ignorance in some other states.  Get it now,
before the Federal Tax credit goes down at the end of 2019, and before
those lobbyists screw homeowners with more protective monopoly legislation.

I'd love to hear details of how bad it is now in Florida.
See:
https://www.tampabay.com/opinion/columns/how-the-power-companies-killed-solar-energy-in-the-sunshine-state-daniel-ruth-20190712/

Bob

On Sat, Jul 13, 2019 at 4:38 PM EVDL Administrator via EV 
wrote:

> On 13 Jul 2019 at 12:39, Mr. Sharkey via EV wrote:
>
> > Virtually ~all~ utility companies require a customer who plans to
> > produce power and introduce it to their grid to have complied with
> > stringent regulations ... you will almost certainly be *charged* for
> > any excess power that you push back into the grid, rather than
> > credited for it
>
> Thanks for making that point.  I'm surprised at how the PV world continues
> to treat grid intertie as some kind of holy grail, even as the power
> companies take every opportunity to make it more difficult and expensive.
>
> At least in most parts of the US, and even in some places in Europe, the
> grid is NOT a gigantic free battery.  You PAY to use it.  And what you pay
> is not likely to decrease; quite to the contrary.
>
> We're going back to the way intertie started off decades ago.  The
> utilities
> imposed impossible technical and insurance requirements on net metering,
> which led PV hobbyists to start the Guerrilla Solar movement --
> essentially
> doing grid intertie on the sly.
>
> Then various states and localities, and some European nations, passed laws
> supporting net metering.  That's when intertie started to take off.  But
> more recently, the utilites have been buying politicians and getting the
> net
> metering laws reversed.  Guess what -- Guerrilla Solar is back.  Not that
> I'd ever do such a thing, mind you.
>
> I don't think the power companies are going to stop pushing back until
> they've effectively killed grid intertie.
>
> If I were building a PV system in the US today, I'd probably make it 100%
> off grid.  I'd feed a subpanel with it, and as I was able to expand the
> system over a period of years, I'd gradually transfer loads from utility
> power to home power.
>
> David Roden - Akron, Ohio, USA
> EVDL Administrator
>
> = = = = = = = = = = = = = = = = = = = = = = = = = = = = =
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> email address from the webpage http://www.evdl.org/help/ .
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>
>
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Re: [EVDL] Solar off grid with an EV?

[Willie via EV]

On 7/13/19 9:44 AM, Jay Summet via EV wrote:

Also, the PowerWall is able to "fake" the grid well enough that grid tie 
inverters will "powerup" and start to feed power back into what they 
believe is the "grid" but is instead the powerwall. (which accepts the 
power so that the voltage does not climb too high).


I have more PV than my transformer can handle and see high voltages with 
high PV production.  The result is that inverters shut down at around 
260.  Though each inverter seems to have a different threshold.  I have 
a 15kva transformer, though I'm trying to get a 37.5kva, and my PV might 
do as much as 30kw.


I believe that when the powerwall is fully charged (can accept no more 
power) it shifts the frequency of the power from 60 to some other value 
(62 hz?) that is outside of the standards, which causes the grid tie 
inverters to stop feeding current into "the grid".


I first figured the PowerWall allowed voltage to rise and inverters to 
shut themselves down when PV production was too high.  That is while off 
grid.  I've since learned that the PW inverter, while grid spoofing, 
uses a different frequency.  While running off grid, I observe old type 
motor clocks not keeping good time.  I have only one PW battery unit but 
I believe each battery unit has it's own inverter.  With more than one 
battery unit, I suppose one must the the master and the others sync to 
it.  When the PW doesn't have anywhere to go with the PV power (battery 
charged) it shuts down PV inverters by, I suppose, going to a more 
different frequency.  Something like: 62 hz tells every one that the PW 
is spoofing but the PV inverters are happy with it.  Some other 
frequency, say 64 hz, is enough to shut down PV inverters.


I've been pondering how one might detect the "I'm about to shut down PV 
inverters" condition so that some optional loads could be switched on. 
Any suggestions there?


I haven't done enough off grid experimenting to learn how the PW cycles 
on a full battery.  I suspect it might take the battery down maybe 10% 
with PV inverters off, then turn them back on until the battery is fully 
charged again.


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Re: [EVDL] Solar off grid with an EV?

[EVDL Administrator via EV]

On 13 Jul 2019 at 12:39, Mr. Sharkey via EV wrote:

> Virtually ~all~ utility companies require a customer who plans to
> produce power and introduce it to their grid to have complied with
> stringent regulations ... you will almost certainly be *charged* for
> any excess power that you push back into the grid, rather than
> credited for it 

Thanks for making that point.  I'm surprised at how the PV world continues 
to treat grid intertie as some kind of holy grail, even as the power 
companies take every opportunity to make it more difficult and expensive.  

At least in most parts of the US, and even in some places in Europe, the 
grid is NOT a gigantic free battery.  You PAY to use it.  And what you pay 
is not likely to decrease; quite to the contrary.

We're going back to the way intertie started off decades ago.  The utilities 
imposed impossible technical and insurance requirements on net metering, 
which led PV hobbyists to start the Guerrilla Solar movement -- essentially 
doing grid intertie on the sly.

Then various states and localities, and some European nations, passed laws 
supporting net metering.  That's when intertie started to take off.  But 
more recently, the utilites have been buying politicians and getting the net 
metering laws reversed.  Guess what -- Guerrilla Solar is back.  Not that 
I'd ever do such a thing, mind you.

I don't think the power companies are going to stop pushing back until 
they've effectively killed grid intertie.  

If I were building a PV system in the US today, I'd probably make it 100% 
off grid.  I'd feed a subpanel with it, and as I was able to expand the 
system over a period of years, I'd gradually transfer loads from utility 
power to home power.

David Roden - Akron, Ohio, USA
EVDL Administrator

= = = = = = = = = = = = = = = = = = = = = = = = = = = = =
EVDL Information: http://www.evdl.org/help/
= = = = = = = = = = = = = = = = = = = = = = = = = = = = = 
Note: mail sent to "evpost" and "etpost" addresses will not 
reach me.  To send a private message, please obtain my 
email address from the webpage http://www.evdl.org/help/ .
= = = = = = = = = = = = = = = = = = = = = = = = = = = = =


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Re: [EVDL] Solar off grid with an EV?

[Jay Summet via EV]

Is it possible to charge an EV direct from the sun? Yes, but it's not 
"buy it at Wallmart and plug it in" simple. Yet.


Well, you COULD buy everything at walmart(.com), but yes, you would have 
to do some wiring yourself to get all the items to plug into each other. 
(I would not recommend these specific items, or buying solar gear at 
walmart, as you can do a lot better in price and quality elsewhere...but 
as an example...)


2000 - (4k peak) watt power inverter:
https://www.walmart.com/ip/Whistler-2000-Watt-Power-Inverter-4000-Watt-Peak-Power/40626655

800w of solar panels & charge controller (massively overpriced! And 
you'd probably want closer to 2000 watts of solar for continuous 
charging, or a LOT of batteries)

https://www.walmart.com/ip/Renogy-800W-24V-Solar-Panel-Monocrystalline-Off-Grid-Starter-Kit-with-40A-Rover-MPPT-Charger-Controller/147049810

12v deep cycle battery (may need more than one if you want to store 
solar power when the car isn't plugged in)

https://www.walmart.com/ip/12V-100AH-BATTERY-FOR-SOLAR-WIND-DEEP-CYCLE-VRLA-12V-24V-48V/179446910

Level1/2 EVSE:
https://www.walmart.com/ip/ACCELL-P-120240V-USA-001-Dual-Voltage-AxFAST-Portable-Electric-Vehicle-Charger-EVSE-Level-2/399778767
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Re: [EVDL] Solar off grid with an EV?

[Mr. Sharkey via EV]

No, you're not being misunderstood, but you apparently are 
misunderstanding how the module-level inverters will be accepted by 
your power provider.


Virtually ~all~ utility companies require a customer who plans to 
produce power and introduce it to their grid to have complied with 
stringent regulations, both technical and legal, and have in place a 
contract to feed the power into their grid. A net metering agreement 
or tariff contract is required whether you produce enough to "spin 
the meter backwards" or you will consume all of the power produced at 
the time of production.


Worse, if you have any type of electronic revenue meter (as opposed 
to the old, "spinning disc" meters), you will almost certainly be 
*charged* for any excess power that you push back into the grid, 
rather than credited for it. Electronic meters can tell which way the 
energy is going, but are programmed by default to treat every 
Watt-hour that crosses them to be consumption. The 
net-metering/tariff agreement will provide you with a meter that has 
been programmed to have separate registers for consumption and production.


You're also likely to run afoul of local and state regulations 
concerning electrical codes if you simply "plug in" your AC modules. 
Many of the less expensive (read: china made) "micro inverters" will 
not have the certifications to comply with the utility's and NEC requirements.


Is it possible to charge an EV direct from the sun? Yes, but it's not 
"buy it at Wallmart and plug it in" simple. Yet.





>>It seems like I am being misunderstood. You can buy solar arrays each with
its own MPP and inverter to produce 120VAC. You can buy one and add more
over time with out consideration of string balancing and such.

You can tie them to the grid, and if your rate plan us good then you will
be offsetting the cost of charging your EV with whatever the present size
of your microinverter solar arrays is.


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Re: [EVDL] Solar off grid with an EV?

[Jim Walls via EV]

On 07/13/2019 07:44, Jay Summet via EV wrote:
Also, the PowerWall is able to "fake" the grid well enough that grid 
tie inverters will "powerup" and start to feed power back into what 
they believe is the "grid" but is instead the powerwall. (which 
accepts the power so that the voltage does not climb too high).


I believe that when the powerwall is fully charged (can accept no more 
power) it shifts the frequency of the power from 60 to some other 
value (62 hz?) that is outside of the standards, which causes the grid 
tie inverters to stop feeding current into "the grid".


So in this way a PowerWall attached to a house with a grid tie 
inverter (either a single wall mount or microinverters on each panel) 
can use the solar power to refill in the power outage as well as to 
share the load from the house when the sun is out.


My solar installation vendor is just starting to sell / lease the Tesla 
Powerwall.  The advertising mailing (take that for whatever it's worth) 
implies without the technical part similar to the way Jay describes it.  
I have not contacted them yet, but am interested to see what they are 
offering...  They were specifically talking about situations where the 
electric utility cuts power to reduce bush fire risk and the PowerWall 
as a way to stay up and operating.


--
73
-
Jim Walls - K6CCC
j...@k6ccc.org
Ofc:  818-548-4804

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Re: [EVDL] Solar off grid with an EV?

[Michael Ross via EV]

It seems like I am being misunderstood. You can buy solar arrays each with
its own MPP and inverter to produce 120VAC. You can buy one and add more
over time with out consideration of string balancing and such.

You can tie them to the grid, and if your rate plan us good then you will
be offsetting the cost of charging your EV with whatever the present size
of your microinverter solar arrays is.

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On Sat, Jul 13, 2019 at 1:23 AM Lee Hart via EV  wrote:

> Robert Bruninga via EV wrote:
> > No, just because it produces 60 Hz AC does not make it a Microinverter.
> > Anyone can make an inverter,  They are dirt cheap from 1kw to 3 kW and
> only
> > cost about 15 cents a watt!  You can buy a 2 kW "inverter" for not much
> > more than $300.  But that does not make it a Grid-Tie microinverer.
> >
> > A grid tie microinverter is a CURRENT SOURCE that pushes current against
> an
> > existing waveform  It has to have an infinite load (the grid) or the
> > voltage will soar out of sight if the load goes down.  That is what
> current
> > sources do.  Fundamental EE.
>
> Bob is right. People are being a bit loose with their definitions.
>
> A "microinverter" is just a small inverter. There are zillions of these.
>
> A normal inverter is one whose control circuits make it behave like a
> voltage source. The inverter sets the output voltage and frequency at
> (say 120vac 60hz). The load then draws whatever current it needs, from 0
> to the max power the inverter can handle. The inverter does its best to
> hold the voltage at 120vac while supplying that current.
>
> A "grid tie" inverter is an inverter whose control circuits make it
> behave like a current source. The *grid* sets the voltage and frequency;
> the inverter just delivers its current. Without a grid, such an inverter
> won't work.
>
> The power section of an inverter is the same, regardless of what type it
> is. The differences are in the control circuitry. Generally, the power
> section costs all the money. The control circuitry is cheap in comparison.
>
> > Sure, one can design a box that can do both,  But that is a complex
> > internal circuitry that does either one or the other, but they are
> totally
> > different circuits...
>
> Well, nowdays it's just a one-chip microcomputer that costs a few
> dollars; no matter what kind of inverter you're building.
>
> --
> In software development, there are two kinds of error: Conceptual
> errors, implementation errors, and off-by-one errors. (anonymous)
> --
> Lee Hart, 814 8th Ave N, Sartell MN 56377, www.sunrise-ev.com
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>

-- 
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(919) 585-6737 Land
(919) 901-2805 Cell and Text
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Re: [EVDL] Solar off grid with an EV?

[Jay Summet via EV]

On 7/13/19 12:03 AM, Robert Bruninga via EV wrote:


When the powerwall battery is selling power to the grid, it is using its
current-source grid-tie circuitry.  When it is islanding as a backup power
system without a grid, it is using completely different circuitry as a
stand alone inverter.  


Also, the PowerWall is able to "fake" the grid well enough that grid tie 
inverters will "powerup" and start to feed power back into what they 
believe is the "grid" but is instead the powerwall. (which accepts the 
power so that the voltage does not climb too high).


I believe that when the powerwall is fully charged (can accept no more 
power) it shifts the frequency of the power from 60 to some other value 
(62 hz?) that is outside of the standards, which causes the grid tie 
inverters to stop feeding current into "the grid".


So in this way a PowerWall attached to a house with a grid tie inverter 
(either a single wall mount or microinverters on each panel) can use the 
solar power to refill in the power outage as well as to share the load 
from the house when the sun is out.


Jay
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[EVDL] (Fwd) Siemens Simotion converter.

[EVDL Administrator via EV]

Forwarding because the poster sent this message to the list manager address, 
not to the list.   Maybe someone can help.  

Please don't send replies directly to me; send them to the list or to the 
original poster.  Thanks.

--- Forwarded message follows ---
From:   Gintaras Rumsa 
Date sent:  Sat, 13 Jul 2019 10:56:07 +0300
Subject:Siemens Simotion converter.

Hi,  Which wvT4 rear axle overhaul y electric motor driven bridge.  I used
a 3-phase motor with a gearbox from the solo.  It was a little
reconstructed.  Simens Simotion's old converter adapted to 150v. The whole
problem that I can't run on is that it shows a lit fault light.  I don't
know what the problem is.  Maybe someone with simotion converter data
reading Siadis 3.11 and how to work with it.  I am very asking for help.
Thank you.

--- end forwarded message ---

David Roden - Akron, Ohio, USA
EVDL Administrator

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