To recharge the battery on a light use unit solar. To recharge a camper you're running, tv, this that etc etc the honda eu2000 is the best bang for the buck.

Then again you know what to do ....GET BOTH IF you battery crapped out when you really need it the Eu2K is a great fall back on unit.

When not in use / off season i disconnect the battery and installed one of the Battery tender jr adapter. The BT jrs' are the best bang for the buck maintenance charger out there. It shuts itself down when charge is reached then goes on if it detects the charge go below X volts.
http://batterytender.com/products/mo...-at-0-75a.html