Besides charging the power station via a wall outlet, Anker 757 Portable Power Station comes with an MPPT solar charger controller that maximizes charging efficiency when connected to solar panels. This is handy when you want to start charging the battery with the first rays of the sun.

Any 12-28V solar charger with an XT-60 female connector can work with the 757 PowerStation. 

Simply set up 3 solar panels with 300W max input, and see your power station go from 0% - 80% in less than 4 hours. Yes, unlimited power from the sun!