Hello Rhino,

I notice you are working on a sump pump project...

I know this is "off the wall", but it may be worth checking into..

they have a "Water Sump Pump"... NO electricity at all...It relys on your water provided by the city/town. The only way this would not work, is if you have well water, and use a electrical pump to pump water from your well...

DWayne