[RE-wrenches] Invert first?

[penobscotsolar at midmaine.com]

Hi Eric,
   Look at your design parameters. There is no reason you can't run DC
250'. You are better with some small amount of DC loss than with AC
loss, particularly if you intend to sell back to the utility. Use a
Classic 250 or 200 or Apollo Solar's T80HV. You can configure your
panel series string voltage high enough to sustain minimal voltage loss
without particularly large wire sizing. Remember to compensate for cold
temps in your Voc. This is just one man's suggestion. I am sure others
might do it differently....

Daryl DeJoy
NABCEP Certified PV installer
Penobscot Solar Design




> Wrenches,
>
> We are designing a super high end grid-tied w/ battery backup system for a
> customer. Array will be ~15kW; pole or stand alone structure mounted; 250'
> from home/batteries. My question is: does it make any sense to invert the
> power at the array and use this ac to make the long run to the batteries
> THEN connect to a typical battery charger rather than a dc charge
> controller? Im mostly concerned with huge dc conductors making this run
> across the property. Havent delved into the specific design enough to size
> said conductors yet, or specify any equipment, but wanted to know if im
> barking up the wrong tree ir not.
> Thanks for the insight.
>
> Eric Thomas
> Founder
> Solar Epiphany LLC
> NABCEP Certified PV Installer
> WA Electrical Contractor # SOLAREL911NR
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