If you are unable to go "boondocking" in order to determine how many amp-hours you consume on the average day, then the following "Rules of Thumb" work fairly well also:

1. Use a minimum 100 watt solar panel for basic battery maintenance on Trailers and Fifth Wheels
   
   
2. Use a minimum of two 100 watt solar panels for basic battery maintenance on MotorHomes.
   
   
3. For the more Conservative consumers of electricity: Allow 200 amp-hours of Battery Storage Capacity and 200 to 300 watts of Solar Panels.
   
   
4. For the more Liberal consumers of electricity: Allow 400 amp-hours of Battery Storage Capacity and 400 to 600 watts of Solar Panels.
   
   
5. For "Hard Core" Boondockers with Mobile Offices: Allow 600 to 800 amp-hours of Battery Storage Capacity and 600 to 800 watts of Solar Panels. We also encourage the use of an M.P.P.T. Current Boosting Controller.

Bear in mind that you can start with one or two solar panels and add more later if needed. This is made quite easy with our SunRunner Systems.