Hi Jeff, Can you please explain why you don't like running high voltage DC long distances?
thanks, jay peltz power On Oct 3, 2011, at 1:58 PM, Jeff Yago wrote: > 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 > > > > ___ _______________________________________________ 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
