Here's an idea for eco friendly, self regenerating shields.
Pardons to anyone who has presented this idea already.
Shields vs Light weapons
Over Powered solar panels that absorb energy from lasers and other energy field weapons and store that energy in highly efficient OP high density capacitors
Shields vs Kinetic weapons
Laser umbrella. Redirect the stored energy from the solar shields to a powerful laser beam aimed at the point of a highly polished reflective cone. The laser beam is spread out like water coming out of an overhead sprinkle