Hi Wrenchies,
Yes and if you use a GENTRAN or equivalent circuit-by-circuit transfer
switch add-on for the output from the offgrid inverter to your AC panel
- then there is no need for a separate dedicated AC loads panel and
rewire like in Larry's original drawing. I've used this trick for y
this is a 240 volt transfer switch and also shown is a 600 volt safety switch
single pole single throw
From: "maver...@mavericksolar.com"
To: RE-wrenches
Sent: Wednesday, November 9, 2011 9:55 PM
Subject: Re: [RE-wrenches] High Voltage MPPT units; Adding batte
I think you shoud go with Solar Edge, and modules optimizers
From: William Miller
To: RE-wrenches
Sent: Wednesday, November 9, 2011 7:42 PM
Subject: Re: [RE-wrenches] What inverter? (was Faulty PM-60 circuit board)
Joel:
24 Enphase M190s.
William Miller
A
I googled "600 volt switch dual throw" and found a cutler-hammer DT363URK.
From
http://www.alliedelec.com/Images/Products/Datasheets/BM/EATON_CUTLER_HAMMER/416-0447.PDF
Not sure if it carries a DC rating all the way to 600v.
Thank you,
Maverick
Maverick Brown
BSEET, NABCEP Certified S
Difficult to tell exactly what's up from the photo.
Gives the impression an object (e.g. hailstone) struck the PV at
the "lower center" of the cell on the left. The impact didn't break
the tempered glass, but was sufficient mechanical shock to fracture
the two cells shown. I've got an old Siemen
I have seen this pattern twice.
1. Lightning strike near the array. But the canals are bright white or deep
black. I have two of those panels for testing and they still work sorta.
2. A bad batch of EVA or an over-cooked batch of EVA during assembly perhaps.
Of course, the photo does not lend
Joel,
That is the fork in the road... To battery-backup or to Not Battery-backup...
That is question.
If you decide to battery-backup, then the SW is still sweet until it just dies.
Any day now...
You could switch to a Outback GVFX 3648 or XW 6048 and keep going
battery-backup.
If the fork i
That one almost looks like a hot spot. If magnification could turn
encapsulant brown, I would wonder if you shot the temperature on it, if it
might not be quite a bit hotter than the rest of the cell.
Bill Dorsett
Sunwrights
Manhattan, KS
-Original Message-
From: re-wrenches-boun...@lists
I sold a lot of the Carrizo panels and saw this effect a time or two.No broken cells, just this pattern in front of the cell. If I remember correctly, the pattern appeared to be "canals" of air in the encapsulate. Far fetched or not, I'm going to guess that a cobweb fell on the glass before the c
Joel:
24 Enphase M190s.
William Miller
At 09:33 AM 11/9/2011, you wrote:
Wrenches,
After telling my customer to upgrade to an MPPT charge controller (thanks
Ray Walters and John Blittersdorf), he decided to really optimize his PV
array and retire his Trace SW4048 inverter. He has 48 Siemen
Oops. My picture is of a blemished Evergreen 210. I saw the orange substance on
your picture and thought that is what you were referring to.
...My Bad.
Larry
On Nov 9, 2011, at 1:41 PM, penobscotso...@midmaine.com wrote:
> Hello all,
> We have a customer who has acquired, over the last ten
Right a major rewire and many components...and sacrifices. The Outback is
limited to 30 amps AC and cost much more than you would need to spend.
With my idea you just add a transfer switchDone. When the grid is down, PV
feeds HV CC. Then you can use ANY size inverter, with or without a
Thanks for that Allan,
I should add that there does not appear to be any cracking of the cell
to the customer when compared to non-effected cells. It is just that
strange "shape" ,"shading" , "design" underneath the glass on that
particular panel and cellsthis is according to the customer, w
I agree with Allan that this looks like cracked cells. As long as the
conductors on the top and bottom remain intact, there will be little if
any degradation in the output. But the conductors are under more stress
than normal and with daily thermal cycling they may break which could
leave piece
Daryl,
Before offering my opinion, I'll note that it's only that, and I'd
hope to learn from others with more knowledge of PV cell structure
than I have. Given that, it appears to me that the silicon wafers
that make up these cells are extensively cracked. It likely will
Hello Ray,
He has had almost no utility power outages since he got his PV system in
2001. By going batteryless, his dc-to-ac conversion efficiency and kWh
production should increase by over 15%. He has not decided if he wants to
keep the SW4048 and float charge his batteries with the grid for
Any amount of power will AC couple.
If you use an off grid inverter, such as an
Outback, to feed the protected load panel, the
inverter should be fed by grid AC power to supply
loads, when the grid is available. Just
feed your grid tie inverter into the protected
loads panel. You will ne
Hello all,
We have a customer who has acquired, over the last ten years or so, a
large array with several different makes and models of panels, all
installed by a qualified electrician and the customer. They have done
an excellent job as far as self installed systems go.
He just sent me a pic
He doesn't want battery backup?
Ray
On 11/9/2011 10:33 AM, Joel Davidson wrote:
Wrenches,
After telling my customer to upgrade to an MPPT charge controller
(thanks Ray Walters and John Blittersdorf), he decided to really
optimize his PV array and retire his Trace SW4048 inverter. He has 48
Wrenches,
After telling my customer to upgrade to an MPPT charge controller (thanks
Ray Walters and John Blittersdorf), he decided to really optimize his PV
array and retire his Trace SW4048 inverter. He has 48 Siemens SP75 modules
(67.5 W DC PTC) that are ground mounted in full sun and easy t
Nice Find, Drake! Thanks.
What is the minimum system for an AC coupled inverter?
Again, the idea is for low cost battery backup of an existing grid tie. The AC
coupled schematics I have looked at require a major rewire and many components.
I would like to hear if someone has a simple add on s
Hi Folks:
I am having difficulty finding a supplier for LED technologies. Anyone have
a prospect?
Feel free to contact me off list.
Chris Daum
Oasis Montana Inc.
406-777-4309
406-777-0830 fax
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I vote for the AC coupled system. But if you
need to make a 600 VDC transfer switch, I think
you could likely make one from Tyco relays and
voltage controlled relays. http://relays.te.com/datasheets/ev200.pdf
At 03:16 PM 11/7/2011, you wrote:
Ray,
Yes, the idea was for a low cost way to a
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