Steve Spence’s site
http://www.green-trust.org is an alternative energy resource and loaded with off-grid power system info.
submitted today and posted with permission
Power System for Andes Sprouts Residency
Six 15 watt compact fluorescent light, running 4 hours daily. 6 x 15 x 4 = 360 wh
One 12v water pump, 8 amps, running one hour daily. 12 * 8 * 1 = 96 wh
One .5 amp radio running 4 hours daily. 12 * .5 * 4 = 24 wh
480 wh daily / 2 full sun hours daily = 240 watts of solar
480 wh / 12v = 40ah * 2 = 80 ah capacity battery.
400 watt inverter, two 12v Marine Deep Cycle batteries (100ah each), two 130 watt pv panels, Total will run about $1500 and provide at least 2 days of no sun operation.
Propane water heater will run about $250, But a water coil wood stove for winter, and a solar water heater for summer might be more appropriate.