Thanks for the replies guys.
It is offgrid and is only a 50w panel with 2 x 12v20AH batteries. I am just testing the waters of solar power to see what I can do myself.
I am using a controller like the one below.
Amazon Japan
I am looking for advice on how to deal with excess electricity when using solar power to charge batteries? Do I need something that will be able to tell when the batteries are full and convert the electricity into heat? If so, what is that sort of device called? Thanks
