[The Other Harry]

Three 100 watt bulbs burning for two hours should cause a 4.5 kilowatt drain on the batteries???

[Izzy Dunne]

Three 100 watt bulbs burning for two hours should cause a 4.5 kilowatt drain on the batteries???

They're only 100-watts if you put 120 Volts across them, - try 1000 volts - they'll burn reeeeeeeallll bright (for a little while).

[js1138]

Three 100 watt bulbs burning for two hours should cause a 4.5 kilowatt drain on the batteries???

I get .6 kwh, roughly. If a storage battery can produce 60 amp hours at 12 volts, that's roughly .72 kwh. Four batterise and you have enough tp run the light bulbs and the dishwasher. A little circuit trickery and you boost the voltage for the final reading.

And what does a voltage reading have to do with power production? A fully charged lead-acid battery will read a pretty constant voltage.