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

[jerrysgarage01]

Wrenches
We have done transformers for issues just like this with good results, the cost vs the new wire, conduit and trenching must be done to make sure which direction. We have had to use paired mcm 300 to make residentual so run the numbers
Jerry


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<div>-------- Original message --------</div><div>From: Chris Schaefer <chris at solarandwindfx.com> </div><div>Date:08/16/2016  7:53 AM  (GMT-10:00) </div><div>To: RE-wrenches <re-wrenches at lists.re-wrenches.org> </div><div>Subject: Re: [RE-wrenches] Buck-Boost transformer to mitigate high voltage	drop? </div><div>
</div>Perhaps I missed it but you didn't say what you measured the voltage to be at the clients service entrance panel at his house?

Christopher

On Tue, Aug 16, 2016 at 1:40 PM, Mac Lewis <maclewis1 at gmail.com> wrote:
Yes, what current did you use to calculate that voltage drop? How big is the PV system?


On Aug 16, 2016 11:38 AM, "Chris Mason" <cometenergysystems at gmail.com> wrote:
How much of the power produced will be self-consumed, how much will be exported?

On Tue, Aug 16, 2016 at 12:16 PM, Howard Arey <scot.arey at solarcentex.com> wrote:
Good day,

 

I have a potential client that has an existing 1,000 foot run from the meter and transformer at the street to the home. This is 4/0 Al and quick calcs show the voltage drop at over 12%. He acknowledges that the wire is undersized to keep voltage at/about 240 volts (I have not measured directly at the street / transformer yet).

 

I know the wire has the necessary ampacity to carry his current service needs and to carry amps from the to-be-suggested solar system.

 

My concern is that the voltage drop will change the 240 volts at the street/transformer/meter to 211ish (or will I see a higher 268’sh voltage at the far house end?) at the house. The inverter will try to synch to this voltage but of course this is outside of typical inverter parameters.

 

So, instead of re-running much large wire, does anybody have experience and comments about potentially using a buck-boots transformer at the home to get us back to 240 volts? This would need to be service entrance sized.

 

Howard “Scot” Arey

Owner, Solar CenTex

254-300-1228

scot.arey at solarcentex.com

 


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