Hi all
I have charged 72 volts on a golf cart type deal, with 2 each morningstar T60
and with 2 each MX 60s But Appolo may work or Classic
the trick is only use the charging function do not connect any communication
cables Grounding is the problem. as one of the controllers is floating.
I have seen that behavior almost. if open cirucit is 330 then MPPT should be
about 264 which is to close to bottom of the window. Last summer a sunny boy
in
a similar situation of 8 modules in string was droping out on MPPT tracking.
The inverter had additional module added and started to
Thanks Larry for all the good info, I have not had any problem with SSMPPT but
my volume is 2, a few years back I had trouble with a Morningstar product, and
they were very fast and complete in the replace ment service. Also if they
know
of a problem they are very through ingetting to the
It depends upon the curature of the roof. If the cure is great enough run
rails
horizonal and mount portrate, if the curature is less and your modules can
mount
on the short side, same plan mounting landscape. .
From: Aaron Mandelkorn
Sorry I was thinking a barrel roof was like a 20 foot radius of curature, sort
of like a quansit roof.
From: William Miller will...@millersolar.com
To: Aaron Mandelkorn reoso...@gmail.com
Cc: RE-wrenches re-wrenches@lists.re-wrenches.org
Sent: Sat, January
Location is 45 N latitude, central Minnesota, the array I have watched the most
is a seasonal adjustable, adjusted about once a month. the steepest is about
60
degree tilt. It is a ground mount and has a flat field in front and easy to
adjust. Weather data is near St. Cloud MN
-
If you find them be sure to post, as I have lost contact also. I am after the
12 volt and other DC voltage compact fluorescent
From: Mick Abraham m...@abrahamsolar.com
To: RE-wrenches re-wrenches@lists.re-wrenches.org
Sent: Fri, January 21, 2011 10:08:21 AM
I have been assured by enphase that my 215 and 220 lose so little I do not have
to worry, however I see them clip at 199 watts for more than 2 hours quite
frequently (maybe 3 hrs) the curve is rising on a clear day and it flat tops at
199 W particularly with snow, cold, on my seasonal tracker
I had a similar situation in Minnesota, my local inspector was puzzeled but the
regional inspector said ABSOLUTLY the solar equipment has to be shut off with
no more than 6 motions of the hand. I combined the AC into a panel of 12
breakers, with one main (i had 12 inverters). For the DC side
In Minnesota there are no charge for residentical power factor or for demand.
Industrial commerical services have demand charges and power factor, i.e. VAR
related charges. These charges start at 90% PF, most of my customers have PF
greater than 90%. If I propose a solar system I enclude PF
perhaps it is voltage controlled. The voltage rises to end of bulk and then
current drops to prevent exceeding that voltage When you initiate a recharge
cycle it quickly raises to absorb and then goes to float. this sounds like
normal operation. Repeate the test when the battery is
Alimunium against galvanize (zinc) is stable, I have been doing this for 40 +
years and I have not seen corrosion, I have seen rapid corrosion with copper to
galvanize, eating the galvanize up. Also I have seen copper to Aluminium being
corrosive, eating on the aluminum. Galvanize is stable
My experance is pperhaps to limited with Magnum but I have been impressed with
the surge capacity of the Magnum AE and I assume the PAE is the same. I have
started larger motors than most other inverters, where the others will kick out
on low voltage the magnum seems to hold longer. I have
I have answered an eariler email, but in regards to backfeed, I have back feed
up to 2kW of grid tied inverter into my Magnum 4024 AE and it held grid
specification for the DGI inverter. Above 2kW into the Magnum the Grid tied
inverter kicks out on frequency specification. Other inverters do
Yes they happen, Robb Cary of Battery Testing Co. has some frightening photos.
I have lost contact with him however. I have had an experiance, but I did not
take pictures. When you find the top of the battery and or battery enclousure
blowen to smitherens it was a hydrogen explosion. Sorry
I have always been concerned with both high and low temperature. On case of a
battery bank failure it was insulated with 1.5 inch foam (no acid problems) but
the battery melted I think from thermal runaway and
--- On Fri, 12/10/10, bob ellison reelli...@gmail.com wrote:
From: bob ellison
Does the 30% grant for schools work? is it real? and how does it work?
Thanks Darryl
___
List sponsored by Home Power magazine
List Address: RE-wrenches@lists.re-wrenches.org
Options settings:
Hi all
I think you need to look at the whole picture, and how much time is in
installing one verse 13 or inverters. From my only a couple of times the
single inverter is easier. Also the question of number of MPPT circuits would
be needed
You may want to look at if there are advantages in
Yes
from all sources of supply, the transformerless inverter is a source of
supply. BOTH legs of all strings should be fused. It has always been that
strings shall be protected from all sources of supply, and only SMA had stated
that it will not back feed, This nature of the transformerless
I never thought I would disagree with William, I have the highest admiration
for him,
But the transformerless inverter has no seperation between grid and array, no
problem if everything is fused.
Darryl
--- On Sat, 11/13/10, William Miller will...@millersolar.com wrote:
From: William Miller
is 50% rule.
Is this true for all bi-directional inverters?
And curious how you found out? hard way or via engineer?
thanks,
jay
On Oct 29, 2010, at 9:18 AM, Darryl Thayer wrote:
The Morningstar relay driver can exercize an AC laod to take the heaver loads
from the inverter by controlling AC
The Morningstar relay driver can exercize an AC laod to take the heaver loads
from the inverter by controlling AC loads as Jay mentions.
BTW this works well but becareful to have the battery system inverter larger
than the direct grid inverter otherwise the battery inverter will shut down the
engineer?
thanks,
jay
On Oct 29, 2010, at 9:18 AM, Darryl Thayer wrote:
The Morningstar relay driver can exercize an AC laod
to take the heaver loads from the inverter by controlling AC
loads as Jay mentions.
BTW this works well but becareful to have the battery
system
Battery to distubution, I would use a T fuse and a battery breaker to shut off
the distubution panel.
I would distubute with a Sq.D QO panel. I believe the max breaker size for DC
rating is 60 amps on QO breakers.
Do you mean 30 watt or 30 watt equivelent leds? the 30 to 50 watt led is
Thanks Jamie I find your input to be most valuable, the photo shows how the
plate material has been blown off the positive grid a sure sign of
overcharging and overcharge rate
Daryl
--- On Sat, 10/23/10, James Surrette ja...@surrette.com wrote:
From: James Surrette ja...@surrette.com
Subject:
Good question and answer, I talked to several at the SPI and indeed they are
being developed (series arc fault), But universally people said they have no
standard to test to. UL has not writen the test that must be passed
Darryl
--- On Sat, 10/23/10, Bill Brooks billbroo...@yahoo.com wrote:
HI I am on road no code book, but I remember clearances in 110 the electrical
equipment is considered to be in one plane if the fronts are with in 6 of each
other. When faced with a similar problem I added spacers to the equipment to
resolve.
Good luck
--- On Fri, 10/22/10,
All batteries have a maximum charge rate and that rate decreases as the
batteries get charged. Rapid charging shows up as swelling of the positive
plate. Also the rapid charging will cause the plates both to flake off material
and this falls to the bottom of the case eventually shorting the
I have been known to be an idiot, but put it up for the labor IF you can be
sure you are done. I have tested some, and not only did they not last, they
did not produce.
--- On Wed, 10/20/10, Kelly Keilwitz, Whidbey Sun Wind
ke...@whidbeysunwind.com wrote:
From: Kelly Keilwitz, Whidbey
alternating current stepped down to 120 volts.
See http://en.wikipedia.org/wiki/War_of_Currents 115-volt AC/DC universal
motors in drills and other tools were fairly common until low-cost induction
motors became widespread.
Best regards,
Joel Davidson
- Original Message -
From: Darryl
I keep thinking had the installer routinely megohmed the ground and the hot
they would have known a ground fault existed, and would have repaired. The
event would have not happened. Then the short on the conduit would have triped
the ground fault detector, and lead to a repair. No fire.
Because the ground is not fuse protected. A short from the conduit to grounded
frames and then to the grounded conductor passes through the comon gronded
conductor bus to all of the modules in that string and all other strings that
share that grounded conductor bus which is probibly all the
When I was an electrical apprentus back in the late 40's we called it 110/220
then in the fifties the voltage was reised to 115/230 and some time in the
1960 it was raised to 120 240
Darryl
--- On Mon, 10/18/10, Marco Mangelsdorf ma...@pvthawaii.com wrote:
From: Marco Mangelsdorf
I have seen the top performing contractor in my area sell behind a chiminy and
under a tree, claiming 10% more using Enphase than unshaded.
Darryl
--- On Sun, 10/10/10, Jamie Johnson jjohn...@spefl.com wrote:
From: Jamie Johnson jjohn...@spefl.com
Subject: Re: [RE-wrenches] Enphase v.
I remember a few years back. a customer insisted on a particular arrangment, I
said that it was a mistake, it would not work, I did it his way, it did not
work, He sued saying I was the expert and I should not have done it that way.
in spite of his insistance. I lost. the settlement was not
Yes I have also paralleled amp meters, and trimetics, and data loggers on one
shunt, all with good results. I have even parralleled shunts, two 500s wired
reverse return of course, with busbars it also works well.
--- On Fri, 10/1/10, penobscotso...@midmaine.com penobscotso...@midmaine.com
On Parralleling shunts the meter reads 1/2 the value on each shunt.
Darryl
--- On Fri, 10/1/10, penobscotso...@midmaine.com penobscotso...@midmaine.com
wrote:
From: penobscotso...@midmaine.com penobscotso...@midmaine.com
Subject: Re: [RE-wrenches] paralleling amp hour meters on one shunt?
Hi William, The PV side has to be ungrounded. the inverter provides GFDI. The
AC side is as normal. If one is installed both of the DC side conductors have
to be disconnected at the same time. If one of the DC conductors becomes
grounded it will blow the AC side OCPD. There is a large AC
HI all
The serious three falls I know of in Minnesota were two ladder related and one
no tie off or guard rail. The two ladder falls were transitioning from the
roof to the ladder, Several OSHA rules were violated, but the biggest was 'Oh
I done this before syndrome. and Lets get done hurry
In Minnesota we have had three falls from roofs that I know of. All three of
these falls have had serious results. All life changing for the worker.
Months in the hospital, to walking problems, hand and arm problems and brain
injuries. Two were no ladder tie off issues and the third
, Darryl Thayer daryl_so...@yahoo.com wrote:
From: Darryl Thayer daryl_so...@yahoo.com
Subject: Re: [RE-wrenches] PV and Roof Flammability
To: RE-wrenches re-wrenches@lists.re-wrenches.org
Date: Thursday, September 23, 2010, 8:39 PM
Hi all
Of course there were some fires with thermal collectors
Hi all
I have done several On Demand Heaters with SDHW, typically the SDHW provides
100% all summer (7-8 months) and then falls short in the winter. I have never
done a On Demand Heater that has made the customer happy. They all have
complained about 'chase the temperature' because there is a
If you are doing Off Grid is it enough just to drive two ground rods? and make
a connection between them? Also what is the lowest Ohm reading your DGC
1000 meter can read?
Thanks
--- On Wed, 9/15/10, R Ray Walters r...@solarray.com wrote:
From: R Ray Walters r...@solarray.com
Subject: Re:
Hi all
I have a very large client (160 acre campus) who wants a few as many as 40
trackers, I am installing and on the road. But wants to gain experience with
one unit. Does any one know or have a 225 they would be willing to part with
and wait for my order?
Also Client says that
Thanks for the discussion, I have found that for me there is no time advantage
in micro inverters. The wire management under the modules slows me down. But
for very small systems they seem to advantages. The industry is rapidly
changing, and with the code 2011 NEC and the arc fault
If the hydro is small I think I would try rectifying and putting into a charge
controller. and then use an Outback to make grid power. (GFX) Each charge
controller would need its own rectifier. never parallel charge controllers on
the DC input side. This is only helpful if the hydro can
Hi all, thanks so much. I did do dilignece and checked it out. I thank you so
much for the suggestions, I do not want to hear from this roof again, so I
looked at it all.
Here is my conclusions:
When the array was installed, the first row was set, the next row was set on
top touching the
It sure sounds like the surge is pushing the voltage around. I susspect that
the AC is causing voltage sag and the UPS is tripping off this low voltage. I
thought if the SB8000 used a neutral connection it was not supposed to get
pushed off center. The most puzzeling thing is why did it not
-wrenches re-wrenches@lists.re-wrenches.org
Date: Monday, August 30, 2010, 7:55 AM
Expansion joint in rails?
Holt E. Kelly
Holtek Fireplace Solar Products
500 Jewell Dr.
Waco TX. 76712
254-751-9111
www.holteksolar.com
- Original Message - From: Darryl Thayer daryl_so...@yahoo.com
I
would verify with
them..they have expansion joint plates.
Holt E. Kelly
Holtek Fireplace Solar Products
500 Jewell Dr.
Waco TX. 76712
254-751-9111
www.holteksolar.com
- Original Message -
From: Darryl Thayer daryl_so...@yahoo.com
To: RE-wrenches re-wrenches@lists.re
Bosch and Milwalkee Tool have them, I have seen them advertized and
demonstrated on a mock roof, They work reliably with one layer of asphalt
shingles, not with two. The cheap ones do not work. these are ultra sound I
think.
Darryl
--- On Mon, 8/30/10, Gary Easton g...@arp-solar.com wrote:
.that might
get tricky...can you split the run ...say have 2 - 15'
rails with 1'
separation
Holt E. Kelly
Holtek Fireplace Solar Products
500 Jewell Dr.
Waco TX. 76712
254-751-9111
www.holteksolar.com
- Original Message -
From: Darryl Thayer daryl_so...@yahoo.com
To: RE-wrenches re
Sorry so slow getting back, I put answers int questions
Thanks Matt
--- On Mon, 8/30/10, Matt Lafferty gilliga...@gmail.com wrote:
From: Matt Lafferty gilliga...@gmail.com
Darryl,
No answers. Just questions in search of answers.
Is this a single-layer comp roof? Yes
Did the noises
exceeded the 30' limitjust
guessing.
Holt E. Kelly
Holtek Fireplace Solar Products
500 Jewell Dr.
Waco TX. 76712
254-751-9111
www.holteksolar.com
- Original Message -
From: Darryl Thayer daryl_so...@yahoo.com
To: RE-wrenches re-wrenches@lists.re-wrenches.org
Sent
where the two structures met.
Nick Soleil
Project Manager
Advanced Alternative Energy Solutions, LLC
PO Box 657
Petaluma, CA 94953
Cell: 707-321-2937
Office: 707-789-9537
Fax:707-769-9037
From: Darryl Thayer daryl_so...@yahoo.com
To: RE-wrenches re-wrenches@lists.re-wrenches.org
Sent: Mon
data point. Hope this helps...
Dan
--- On Mon, 8/30/10, Darryl Thayer daryl_so...@yahoo.com
wrote:
From: Darryl Thayer daryl_so...@yahoo.com
Subject: Re: [RE-wrenches] roof noise after solar install.
To: RE-wrenches re-wrenches@lists.re-wrenches.org
Date: Monday, August 30, 2010, 1:23 PM
Sorry this could be more helpful if I had a better memory, I don't mean to
ramble, but some wrenches may find value.
I am working on a standalone system now and I am in testing. Normally I use
OUtback, (and I am very happy) and this time I decided to use Magnum 4024 AE.
The job has both a
HI all
it is referenced several times.
First 110.15 Orange or other marking ect
408.3E Panel boards
409.120 Industrial panel boards
430.80-84 (MCC) Motor Control Centers
Part of this is from memory, I do not have my code book handy, and as always my
memory is not so good
--- On
Thayer daryl_so...@yahoo.com wrote:
From: Darryl Thayer
daryl_so...@yahoo.com
Subject: Re: [RE-wrenches] useful info
on wire color coding
To: RE-wrenches
re-wrenches@lists.re-wrenches.org
Date: Monday, August 23,
2010, 11:04 AM
HI all
it is referenced several times.
First 110.15
Orange or other
How can this be approved? so a homeowner takes an extension cord and plugs in
solar after solar he has a 20 amp circuit and on one end he has a 20 amp
breaker and on the other he has 20 amps of solar, now he has an overload and no
protection, underwriters says no way on insurance!
darryl
---
Bob you know the architecture of the MX60 is it a design problem or is it a
component problem, I have not noticed this problem in older MX60s but I was not
looking for it either. I have been able to adjust the meter and I typically
would not check it again. I use my meter and adjust the MX60
I should know this, when you face the motor looking at the shaft it will turn
CW when it is wired ABC or Black Red Blue, for 120/208 or 240 3phase BUT BUT
you had best not trust the color code, the code no longer requires colors, and
when installing motors we always test. There are testers
Just a note, FYI
The GFCI will work without a ground, it operates when the current is different
between the Hot and the Neutral
If the generator does not ground the neutral it is supposed to be grounded on
the service or what ever is using the power. The honda inverter generator may
not have
member provide feedback on the Canadian mfr,
Mechron?
Much appreciated,
Mick Abraham, Proprietor
www.abrahamsolar.com
Voice: 970-731-4675
On Sat, Aug 7, 2010 at 11:19 AM, Darryl Thayer daryl_so...@yahoo.com wrote:
I have a functioning Outback system of 12 inverters, the original
Hi Doug
My 12 stack may not be in compliance today, it appeared to be in compliance
when it was installed. It works, but I do not wish to look to hard at it. It
involved extra and custom work by outback when it was installed.
Darryl
--- On Sun, 8/8/10, Doug Pratt dmpr...@sbcglobal.net wrote:
www.abrahamsolar.com
Voice: 970-731-4675
On Sun, Aug 8, 2010 at 10:51 AM, Darryl Thayer daryl_so...@yahoo.com wrote:
Hi Doug
My 12 stack may not be in compliance today, it appeared to be in compliance
when it was installed. It works, but I do not wish to look to hard at it. It
involved
I have a functioning Outback system of 12 inverters, the original design was
for 15 inverters. My system can sell up to 40 kW to the grid and I have seen
pictures of systems up to 25 inverters. How big a battery bank and how big a
generator? Realistically you may not want to charge over C/10
Roy is this not the same except fot the ridiges that Mick Sigrillo reported on
in 2009 small wind conference, the same one that I had taken data on? Mick
reported at the rate of energy production it would take 1000 yrs to pay back.
My data was equally bad
ST
--- On Sat, 7/24/10, Chris Daum
I found similar to Phil, but all the wire had thwn-2 on the spool label but not
on the wire.
Execpt for pink it did not have thwn-2 on the spool lable.
Darryl
--- On Fri, 7/23/10, Phil Undercuffler solarp...@gmail.com wrote:
From: Phil Undercuffler solarp...@gmail.com
Subject: Re:
terribly inconvenienced.
On 7/22/2010 9:09 PM, Darryl Thayer wrote:
I am talking with a
customer who wants to do a standalone system using an
Endurance wind machine, solar, and genset. I have
I have used this approach with 1/2 inch nom. copper tube, it works. The
Aluminum I got form New Jersey Aluminum, they sold out to another company. I
am not sure it is made any more, but I had a custom extrusion made for me for
about $3000 I have also seen a thin folded AL fin from floor heat
remote
control, and BMK battery monitoring kit can do enhanced SOC control. Has
anyone compared this with the Outback as I have not used the PAE inverter yet,
only the AE inverter?
Darryl
--- On Wed, 7/21/10, Darryl Thayer daryl_so...@yahoo.com wrote:
From: Darryl Thayer daryl_so...@yahoo.com
My experiance is limited, but I saw results of paralled AGMs cataching fire, It
was several years ago, I think is was only 4 parallel strings (maybe 6). It
happened during the day with a high charge rate. AGMs have a higher
temperature voltage temperature curve. The temperature got higher on
The propane and gasoline generators both ar premixed combustion and have a low
efficiency at part throttle/ part load. The Diesel does the best job of
maintaining efficency at low load. The outback can control its charging
current to the load limit of the generator. If the AC loads need
Hi Ronald
Thanks for helping with these battery questions. I think I have seen improved
cycle life increase when I keep the recharge rate lower. I do not recomsnd a
very large generator, in fact I tend to recomend smaller generators. I also
believe in SOC charge control, where if the SOC gets
That is a tough one to diagnose, but I think you have some sulfation, I have
used interstates and had reasonable luck. They act more like a traction
battery than a RE battery. This might be a job for a desulfator or a very long
slow charge. It takes a long time to get sulfur to leave the
Hello
I am very interested in the Egauge I think it can be looked at egauge.net
It can monitor AC power (current) on 9 channels, and outputs on power-line
carrier, I have been told they can put it on the internet at no additional
cost.
Darryl
--- On Sun, 6/27/10, Glenn Burt
Hi all
A while back we had a thread going on demand savings from PV. I reciently
viewed a 1 year data set. The PV Savings were $36/ month on energy and almost
$100 a month on Demand. The company is a small business with lots of computers
and of course air conditioning We are blessed with a
, Mobile 323-839-6108, Fax 323-258-8885
-Original Message-
From: re-wrenches-boun...@lists.re-wrenches.org
[mailto:re-wrenches-boun...@lists.re-wrenches.org]
On Behalf Of Darryl
Thayer
Sent: Saturday, June 26, 2010 7:21 AM
To: RE-wrenches
Subject: Re: [RE-wrenches] Demand savings
Use caution here the battery cycles depends upon DOD and recharge rate. I have
found that recharge rates over C/10 shorten battery life. And if you measure
the recharge voltage absorb volts, you can not push even that hard except when
the battery is low. Further charge voltage gets to high
Hi The load issue with Diesels is most stand by diesels are started once per
month, and run for a period of time, this is at light load. If the Diesel is
not worked hard the rings lose there seal ie compression falls and makes them
hard to start. Therefore they are load tested on various
I do not remember every doing one, but I have been asked several times. I
assume you want the maximum oxygen for the minimum energy? or do you want the
pond to have some circulation to prevent freezing?
I would think just pumping air to the bottom would be a low return, prehaps
spraying
Hi fellow wrenches forgive me if this has been said.
The AC is a special problem on MIcro inverters because the long runs modules to
service are now in the AC section of the system. The DC connections are very
short. The utility has a +- 5% normal tolerance, which leaves us with only 5%
to
Just my two cents worth, from measured data we get about 1250 kWh per watt in
Minnesota per year this is measured over roughly 8 years, I had more trouble
with the monitoring system than the array. The winter measured lower than
predicted, and the summer measured higher. The winter is easy to
Hi I have such a set up but the monitoring would be the problem. I think I
would want a thing like a TED that works.
Darryl
--- On Mon, 6/7/10, Andrew Truitt atru...@gmail.com wrote:
From: Andrew Truitt atru...@gmail.com
Subject: [RE-wrenches] Unshaded micro-inverter performance
To:
+ demand monitoring
and we've been pretty happy with them. Not always the easiest thing to install
and make look good but it does work! A little pricier than TED though.
- Andrew
On Mon, Jun 7, 2010 at 10:40 AM, Darryl Thayer daryl_so...@yahoo.com wrote:
Hi I have such a set up
I thought the Sq.D QO for sizes up to 60 amp was rated for DC? and only the
Square D
Also why not use DC breakers? Robin makes some very small breaker boxes, and he
alos has high voltage breakers, (at least 250 volt? DC)
Darryl
--- On Thu, 5/13/10, William Miller will...@millersolar.com
Hi
what you are referring to is sometimes called the DT Kluge. I have used it in a
couple of ways. The original reason was to use a small, 120 volt, low quality
generator to act as an emergency charging scheme for an Outback Bimodal system.
(Grid tied where they were having frequent outages
Hello
I have used the T80HV and no problems. HOwever I am not as close to the limit
as you are. My app exceeded the T80 and Flexmax 80 voltage limits, it has been
awhile and I do not remember the exact specs. I also just accept the data it
presents, I have no indication that it is
The temperature correction is the concern. I have heard lots of stories of
inverters dieing when it gets to cold. Look in the code book 690.7 at the
temperature correction table. Go to weather.com and find your record low
temperature. Find you Tc factor and will your senerios work? I have
Hi Jeff
I have used Outback inverters and not had a problem, I use both SB and PVP
for the AC side and a varity of connections on the DC side of the Outback.
Frankly I have had very good success, I hope it continues. I can not figgure
out why your system would act this way.
Darryl
---
This last week I spoke with a cell phone tower installer. He said, Nothing beats the ground! he said the most important thing is the tower grounding, The idea of 25 Ohms to Ground is way to high. Ground rods are useless,and lightning arresters do no good without a good ground, in fact people who
Hi Peter APRS world has a revinue grade DAS
James could advise you as to multiple power inputs. I also think he as alarm
settings.. On a demand reduction system I am just performing monitoring using
a very cheap
TED. I am working on a building with 800 amp single phase service, I just
Hi all for what it is worth, I have heard of strange things with the northern
lights and other inverters. ( think it was about switching spikes when working
with inverters) This seems to be special with the northern lights generator.
--- On Mon, 4/12/10, benn kilburn b...@daystarsolar.ca
HI all I just got a Standalone north woods 14 x 20 feet, 2 room 4 season home.
It is so small I want to do most loads DC, it has been over a year since I have
had this type project.
Where are people getting 24 or 32 or 48 volt CFLs? Are there any LED now
suitable at these voltages?
Drake, I measured and published a paper in 1992 on the after 10 year
performance of solar modules, my study concluded these modules degraded
approximately 1% per year. The purpose of the study was the effect on utility
demand.
I have heard there are some very good studies with similar
Yes
But I think we are missing one point. AC modules are a source of power, they
are overcurrent protected unlike DC wiring, But if you add electrical energy it
is like increasing the breaker size without increasing the wire size. If a DIY
takes and puts 16 amps of solar on a 20 amp circuit
Erika
you are correct, the solar radiance can exceed STC by about 125%, any one who
has spent any time with a pyrometer has observed this. From experience's
continuously operated circuits fail fasted than intermittent circuits. for
the temperature and conduit fill, they are valid of
HI all
my last posts have not shown, heres hoping.
I have seen two of these installed on roofs. I have and one of my students now
a solar installer,(NABCEP) has been called to repair. he moved the turbine and
placed the turbine on a bergey tower, and it appears to perform like a XL0.1
(1kW)
Although the 48 volt output from the Cummings small gen is unusual, I like the
Propane option, and perhaps it is suitable. It is small, 5 kW but also
batteries last longer on a slow charge. It also has a controlled output to do
battery charging.
Darryl
--- On Mon, 3/29/10, All Solar, Inc.
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