[RE-wrenches] Buck-Boost transformer to mitigate high voltage drop?

[Ray Walters]

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.arey at solarcentex.com
>
> www.solarcentex.com <http://www.solarcentex.com/>
>
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>
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