That 284 volt number is if the panel is at 25 degrees C. If the panels are in
full sun and with little wind, they can be higher temperature than that even in
cold weather.
An easy way to get a rough check on that is to disconnect the panels and
temporarily haywire an extra panel in series from
Hi All -
Thanks for the ideas. It definitely sounds like should trying wiring in at
least another module in series to see how it acts.
Best, August
*From:* re-wrenches-boun...@lists.re-wrenches.org [mailto:
re-wrenches-boun...@lists.re-wrenches.org] *On Behalf Of *Warren Lauzon
There is no other wiring close to the sensors. There is likely some radio
frequency interference on site because my client uses a radio transmitting
system for his internet and phone connection. Can Hall Effect Sensors be
effected by RF?
Do you have any wiring close to the actual sensors or
They did provide us with an installation manual. In talking with their
technicians they have told us that there are hundreds of other similar
installations of their equipment around the world and that they have not
seen anything like this problem anywhere else. They did offer to refund
our money
Thanks Phil
I'll look into that. It has been my assumption that Energy Recommerce
makes there own equipment, but with the way things are produced these days
they could be made overseas.
Vince,
I had a similar experience a couple years ago with a Fat Spaniel string
monitoring box w/ Hall
Esteemed wrenches,
As the Chinese invasion continues, I imagine that most of us will end up
using products made in China at some point.
Most of my experience and knowledge has indicated the Chinese modules are by
and large going to be of comparable quality to any other crystalline silicon
Conrad,
Your concern about encapsulation is justified but not just for Chinese
products. EVA and Tedlar are relatively standard throughout the world. My
concern is less about the source or the materials and more about process
time and temperature which are critical in the encapsulation
Hi August
I find it unlikely that you have only one problem with the design and
construction of this system. A quick estimate of string sizing shows that
for most climates 8 modules to a series string is inadequate. But this
time of year low voltage would not be the problem. After you add the NEC
Here is a great report that goes over advanced life cycle
testing of modules and their reasons for failure.
http://www.nrel.gov/docs/fy11osti/47755.pdf . It is a recent study and there
is some good info regarding encapsulents. I can tell you that the high
ranker on the results chart is the Silicon
I just got off the phone with the worlds worst customer (dis)service rep. at
Sharp. It really calls into question whether I want to sell any more of
Sharp modules, if this is how they treat their past customers.
Does anyone have a PDF of the Sharp SunVista manual? The only thing I find
Wow, that was fast! Thank you to everyone who replied on and off line. As
always the wealth of knowledge on the forum, and folks openness to share
always impresses me!
This made my day!
PS: Sharp - Start taking notes...
Brian M. Sipp
First Source Solar Systems
Wrenches,
I live in northern MN where Silicon Energy is building a new manufacturing
plant. I also teach at the local community college. I have met with silicon
energy and have seen the tests. Great module. Looks nice installed too.
Mounting options are limited but the glass on glass is a
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