Solar power

Got offered this solar panel for an off grid project.

Any advice gratefully received.

Probably going to use Toolstation 12v battery and eBay solar controller to start but it would be great to get the most efficient and sustainable solution.

Depends what you want to power, I had 2 yaught batteries which would one day die and need to be recycled. I was thinking maybe the best thing would be to charge powerpacks that could be portable and also power small devices for a long long time

It was for charging as many mobile phones as possible then maybe led lighting, laptops and power tool batteries