Wayne,
Never had an entire array fried. My experience consists of a total of less than
10 modules out of a total of maybe 50 at two different sites. One site had the
much more common (these days) modules with leads and diodes potted in an
epoxy-like material. We use a Dremel tool with a burr bit t
Sorry about that.
I'd like to hear Steve Higgens view on all this.
And the Classic I think has the best adjustments for end of charge
time/amps etc.
Curious why you would raise the end amps with large array/small bank?
jay
> Jay Peltz
Peltz Power
jay.pe...@gmail.com
___
Hi Allan,
I like the classic/wiz bang jr. This allows really good end amp control as
all loads are accounted for.
Higher C rates equal higher internal temps which definitely will shorten
the life.
On Thu, May 21, 2015 at 10:56 AM, Allan Sindelar
wrote:
> Wrenches,
> In the last few years I h
Hi Guys,
The high current can be in the form of higher irradience, not the current
in the lightning. That can destroy the diodes.
you should be able to test on the module side of the diodes to see if there
is voltage on the cell side.
And that will tell you if its worth trying to replace the dio
Wrenchers,
I am interested in using a 6 Pole DC disconnect for a project with TL
inverters. It’s made by a company called DC SunVolt. The data sheet says
“Suitable as PV disconnect switch in accordance with Article 690 of NFPA
(NEC) UL 508, including the requirements for PV applications. UL 508
but under a surge like a lightning strike wouldn't the diodes open rather than
short?
i always considered the pv's to be the least likely thing to be damaged from
lightning and inverters and charge controllers (electronics) to be the most
vulnerable. what in a pv would fail? an intercell conn
Hi Allan,
Like you, we now design for larger arrays and smaller batteries, but have not
yet tweaked CC settings as well. Our Vermont weather is a bit different than
yours to say the least, though tweaks may still be something to consider.
Batteries do use more water. I've installed, and will conti
Hi Wayne,
Several years back I had all sixteen SolarWorld modules on a tracker get
zapped. The two other trackers adjacent to this one had no damaged
modules. The same strike blew out the phone box at the end of the road
(some distance away).
The SolarWorld jboxes were all sealed with no way to
Hello Wrenches,
Today we visited a 10KW residential ground mounted system where there was a
recent lightning strike that fried phones, irrigation system, cable and
apparently the array.
There was no external visible damage but also no voltage at the combiner. We
pulled 10-15 module junction bo
At the risk of adding more confusion to this conversation, I thought I'd
mention something that may be completely unrelated. This would possibly
pertain to this issue if there is a Trace TM500 in the system.
Many years ago, I made many trips to an off-grid site with an SW5548, C40,
and the old Tra
Wrenches,
In the last few years I have changed my approach to off grid system
sizing, primarily due to higher battery costs and lower module
costs. Rather than shooting for a traditional 80-90% of winter load
profile target, I will size a larger array and smaller battery
Hi, Wrenchies~
I would like to hear feedback from other purchasers about the "MT Solar"
crating & packaging. In 2014 we bought two of their "six module" poletop
mounts, but in our case all the protective packaging got trashed somewhere
along the way. It looked less like a shipment and more like a
Hello Wrenches,
I have been following this C-40 drifting thread. From my personal
experience the C-40 always had about a 0.2 to 0.4 volt drift since the
early days (1994-95). This was on a 48-volt system, so the drift might be
less at lower battery voltages. The drift was not a simple mis-calibrat
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