John,
Bill has written an article for SolarPro that you may find relevant:
http://solarprofessional.com/article/?file=SP3_6_pg68_Brookssearch=
Here¹s an excerpt:
³...it is important for system designers to perform detailed low dc voltage
calculations for specific array configurations.
David B.,
Thanks for the reference to this excellent article by Mr. Brooks. I'm a
subscriber and fan of SolarPro and have adopted use of this article on several
projects already. In fact I'm butting heads with a customer now over this min
string size check. I've shown them the
It seems as though almost every utility has a different requirement concerning
Utility External Disconnects and the AC disconnects for the PV system in
general. Some utilities require lockable blade style disconnects while others
will accept the backed breaker in a load panel(if outside) as
Aaron,
Can you give a bit more information? Is this a situation where the meter and
the main disconnect are located on the outside of the building, with a
feeder running to a load center in the garage? Does the utility at this
location require a external lockable disconnect?
Mark Frye
Aaron,
In many locations where an external disconnect isn't required, the
utility reserves the right, in the net metering agreement, to
disconnect the service as might needed for maintenance work or
troubleshooting. What you are suggesting is nothing different than
that. Whether that is
Aaron,
In our state the investor owned utilities determine this based on the tarrif
they have filed with the Public Service Commission. If they file the
requirement with PSC and it thereby becomes law the code becomes moot. We were
just ruled against yesterday in this exact situation.
Hi wrenches:
Have you noticed that roofing companies have recently been trying to sell
solar? One company thought of something that I had never considered. Listen
to
this neat story.
I was servicing a job today, where a roofing company recently removed and
re-installed a PV array on a
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