As the title says can I power my Arduino directly from a small 3w 12v solar panel? I only need power during the day to monitor water level in a tank.
So the question is, can I solder the leads from the solar panel directly to the Arduino or will this give me problems?
Basically no.
A solar panel is a complex voltage/current device. That might give startup problems during dusk/dawn.
An unloaded 12volt panel will also produce >18volt in full sun. Too much for most Arduinos.
It might be better to charge a battery with the panel, and power the Arduino from the battery.
Post specs of all the hardware if you want better advice.
Leo..
thanks what i thought allready.