QUOTE(jennd0718 @ Jul 16 2007, 04:33 PM)
My battery is good for about a day and then I need to charge it back up.
In this area, we get sun just about every day from May to October and I'd really rather go solar than buy a generator.
I agree with PianoTuna that solar is still more expensive than a generator, however, for a tent trailer, your electrical needs may be very low so it's possible that solar could make sense for you.
There's a handy little calculator you might want to check out at http://www.carmanah.com/content/products/g...calculatordist/
. When you get to the second screen, select "Solar Charging Kit". You can enter the number of electrical items you typically use, the amount of use per day for each item, and the calculator will suggest one of their solar products to meet your electrical requirements. From there, you can determine the basic "size" of the solar system you are needing and then do your shopping.
A more comprehensive list of typical "Appliance Energy Use for RV's" can be found at http://www.rvsolar.com/
. From their homepage, choose "Systems/Sizings" and scroll down for the list of typical energy draw for specific appliances. This is not an online calculator, but can give you some good additional information.
Hope those links help out!