To the person who asked what could be done with 75 watts of power. Actually a lot. A chest freezer converted to a refrigerator uses 100 watts a day. A 10 gallon water heater uses 100 watts a day when it has a Missouri wind and solar DC water heating element..
Lights? You are better off seeing how liter of light night lights work and not have lights on your solar.
I was outside a thrift store and noticed a person about to donate an exercise bike. I asked how much they'd take for it and he just gave it to me. I'm needing to loose weight and ready to pedal.
Here is what they are doing in Guatemala with a bicycle.
