Mick, SMA has something:
http://www.sma.de/en/products/off-grid-inverters/smart-load.html Dick Ratico Solarwind Electric Bradford, VT --- You wrote: Step three is most intimidating to me: We need a way to control 240 volt AC heating elements in a fine pulse width modulated PWM fashion, to protect the battery from destructive overcharge in event of a utility blackout. I say 240 volt AC because the amperage goes off the chart if trying to divert big energy from a 48 volt battery. Mr. Ohm would tell us that it's better to use a higher voltage/lower amperage, and on/off control is less sparky with alternating current. --- end of quote --- _______________________________________________ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org 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
