My guess is that in your case the GTPV will just help alleviate the volt
drop situation. I wouldn't start adding transformers, etc until you are
having a problem. Put in the contract that this extra cost may be
necessary for proper function, but I would keep it as a backup. Based
on the numbers you just mentioned, you would only be selling a surplus
of 30 amps, and the existing wire should be adequate for that.
R.Ray Walters
CTO, Solarray, Inc
Nabcep Certified PV Installer,
Licensed Master Electrician
Solar Design Engineer
303 505-8760
On 8/16/2016 1:16 PM, Howard Arey wrote:
Answers to all:
No – I did not measure voltage at the house. Right now, only an
assumption of voltage drop based on my perception of what “typical”
loads might be on this 150-amp service. I wasn’t expecting to see such
small wires for such a long run from transformer to house when I
showed up there without a voltmeter. He is a heavy user, using 6,000
kwh in some months
We’re looking at a 20KW system (he has some other expansion
requirements, he has the roof space, and the need.) I roughly estimate
that he’ll use onsite 40-50 amps of the 82 amps at peak inverter power
output.
Interesting to hear of one transformer response and hope to learn more
on that, too.
*Howard “Scot” Arey*
Owner, Solar CenTex
254-300-1228
scot.a...@solarcentex.com
www.solarcentex.com <http://www.solarcentex.com/>
https://www.facebook.com/SolarCentex
Rated #1 Solar Installer in Texas by Solar Reviews
<http://www.solarreviews.com/solar-companies/top-100-residential-solar-power-contractors-2016/texas/>__
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