Larry,
Thanks. This is helpful. I think it's pretty clear that this system should have
been designed with at least 5 or 6 modules in series to keep the VOC higher,
but that wasn't very feasible with the original controller when the system was
installed 15 years ago. Still, it has worked pretty w
Unfortunately I don't have easy access to a Curve Tracer. That would be nice
for this situation though.
-Luke
On Jun 1, 2015, at 12:13 PM, Jerry Shafer wrote:
> Do you or anyone you know have a IR Curve tester
> Jerry
>
Luke Christy
NABCEP Certified PV Installation Professional™: Certific
HI Ray,
Can you tell me/us where you have your data on the a-Si having higher
voltage degradation over time?
thanks
jay
On Sun, May 31, 2015 at 11:31 AM, Ray Walters wrote:
> Yes, amorphous modules degrade faster then crystalline cells. 15 years
> will really start catching up with you, tha
Do you or anyone you know have a IR Curve tester
Jerry
On May 31, 2015 4:03 PM, "Randy Brooks" wrote:
> I second Jay. If one string is significantly lower, I’d check each module
> in the string. Could be a bad module.
>
> Randy
>
> On May 31, 2015, at 1:23 PM, jay peltz wrote:
>
> HI Luke,
>
>
Many years ago I thought of something like this and wondered why it was not
being made. It’s great to see a product arrive that will make battery backup
direct and simple. No need for dump loads. I like it!
http://www.morningstarcorp.com/backup-power-grid-tied-solar-systems/
Larry Crutcher
Star
Oooo... Or maybe a module or more are shorted and being bypassed ?
A FLIR can sometimes come in handy to look at the entire array and of course
detect bad/hot connections.
But a shorted module will be almost as hot as a working module at MPP
voltage.
boB
On 6/1/2015 11:28 AM, b...@midnit
Sorry...I meant to type 17.75V (71V).
On Jun 1, 2015, at 11:21 AM, Starlight Solar Power Systems
wrote:
Luke,
For reference, we sold/installed many hundreds of Uni-Solar products since
2002. I have never seen anywhere near that much Voc loss.
Since the PVL-68 has an open circuit of 23.1V
Partial shading will also reduce the MPP voltage and to a much smaller
extent, the Voc.
I don't suppose there are some new trees or something at the site ?
Jarmo, I like your presentation.
boB
On 6/1/2015 11:21 AM, Starlight Solar Power Systems wrote:
Luke,
For reference, we sold/instal
Luke,
For reference, we sold/installed many hundreds of Uni-Solar products since
2002. I have never seen anywhere near that much Voc loss.
Since the PVL-68 has an open circuit of 23.1V (92.4V) but you only see 14.2V
(71V), a loss of 25%, I do not believe degradation is the culprit even at 15
All –
Does anyone know that proper way to dispose of junk PV modules? I’ve heard
that they should be recyclable but I’m having a hard time finding a place
to take them. We’ve dealt with several BP recalls and they just take them
to the landfill which seems like a shame.
Best,
August
__
Kirk,
Staber used to tout the tolerance their machines had to Mod sine
inverters and they are made in the US. I guess you'd have to define "local".
We just replaced our old Staber a year ago, which suffered through our family
of 4 for 17 years...and we bought another Staber.
Bill
Fe
Great success with the Fisher/Paykal at 140-160 watt hours per load. I have
used one for over 10 years now. Early models had a few maint. problems and
the last washer is now over 8 years and going strong. They are kind of Plain
Jane old style which has turned off a couple of clients as they wanted
I have an off-grid customer with a 15 year old Xantrex SW5548 inverter and
Staber washer. They need to replace the washer, and want to buy something
local. Any name brands you can think of that are compatible with the Xantrex
staircased waveform? Thanks.
Kirk Herander
VT Solar, LLC
Proven PV
Folks,
I looked back in the archives with no luck. Specifically, has
anyone experienced any problems with RF/Ham radio operation and SMA TL-22
inverters. I seem to be pretty partial to them lately and I have a
potential job with the customer asking about possible problems with
in
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