I have owned my travel trailer for about 6 years now and (gasp) have never camped off the grid… until now. I have a trip planned that does not have access to electricity and my battery is shot. ...
Depends on what you want to be able to use and for how long. Two big things I think are: 1. What kind of lights do you have (LED or incandecant) 2. How do you plan on recharging the battery you buy.
I do a 7-10 day trip off power, but I have a 1000W inverter and plan on getting solar before this years trip. I have a group 31 battery which fits in your price range...