We have designed and installed many systems like this and do not like running
high voltage DC long distances. We invert at the array and run 240 VAC to the
house. This means the array dis-connects match all the other AC dis-connects
and safety switches on the home's exteror that the utilities and fire
department are familiar with using when they need to dis-connect, and AC
dis-connects are less costly than the same size rated DC dis-conencts you will
need if you keep everything DC from the array.
As mentioned in other replys, you will land this 240VAC output at the critical
loads panel downstream from a battery based inverter. I think you will find
that most grid-tie inverters will provide better performance in selling back to
grid. Have a battery-based inverter just "hang aroud" on standby waiting for
a power outage and keeping the batteries topped off. Make sure your battery
based inverter has way to prevent over-charging batteries during a power outage
when using the back feed solar power. Some inverters do this by shifting the
frequency to force the battery inverter to drop off line while others have this
as a program feature.
Jeffrey Yago, pres.
DTI Solar Inc.
(p) 804-457-9566
(f) 815 846-0677
email - [email protected]
on the web - www.pvforyou.com
_____________________________________________________________
Netscape. Just the Net You Need.
_______________________________________________
List sponsored by Home Power magazine
List Address: [email protected]
Options & settings:
http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org
List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org
List rules & etiquette:
www.re-wrenches.org/etiquette.htm
Check out participant bios:
www.members.re-wrenches.org
