Solar panel
Just got a 100w panel and want to run a 12v 80w radiator fan, NO BATTERY. The panel is cranking out 23v do I need to put a controller in the middle. All controllers I look at have a battery hookup b...
Forum Discussion
ewarnerusa wrote:
Sounds like a nice controller, but now you'll need a battery. In fact, many controllers will be damaged if you hook solar input to them without having it hooked to a battery.
I'm not sure why someone said it needed to be an MPPT, we're talking a single 100 W 12V panel here. I'm not saying MPPT can't provide more than PWM, but on a small scale like this it is not something worth paying for.
Some controllers do have a "load" output which would do what you're trying with the fan. But I think would still need a battery.
The difference between PWM and MPPT would be at least 1.5 amps more using an MPPT controller with that panel.
