At 03:09 PM 10/2/2011, you wrote:
Sounds like a good situation for a sunny island system.
I second that option. Run high voltage strings (say 13- 30 volt
module strings) to the Sunny Boys, and AC couple to the Sunny
Islands. I'm running 440 feet to a Sunny Boy, and wire size will
not be a problem. You will likely need 4 of the Sunny Islands if you
want to be able to use the entire 15kW array for backup. It is an
expensive option, but if it is a super high end job, then this would
be the way to go.
Sent from my iPhone.
On Oct 2, 2011, at 12:15 PM, Eric Thomas
<<mailto:solarepiph...@gmail.com>solarepiph...@gmail.com> wrote:
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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