[kaptken]

solar still makes power on a cloudy day. just a little less. Haven't you ever gotten sun burned on overcast days? besides, the grid will be the levelizing tool. spare power is fed back to the grid in from homes and passed on. if there are enough small sources, odds are theres enough power available at any moment. its how the power supply will evolve. in time it will cut down the need for all those peaking units , which are not as green/. mostly gas turbines and jet engine units. less nat gas, and less CO2.