Off Grid Home Forums Technical Discussion Need Help – Solar Powered Fan Re: Need Help – Solar Powered Fan


The problem isn’t voltage, it’s amperage!

You wired the panels in series(4.5v * 2 = 9v) but 50mA. The muffin fans that I have need about .1A at full speed (40 panels in a parallel/serial array)!

1. wire the panels in parallel (lower voltage but higher current) fan will turn slowly.

2. switch to a rechargable 9v for occasional use & use the panels to recharge the battery.

3. use solder connectors & large gauge wire to bring the power from the roof.