You will probably want to do your own research on batteries and solar panels yourself, but I thought some of the information I learned while researching the subject might help you to save some time.
Firstly I learned that the best battery to purchase for a caravan, camper or motorhome, is what is known as a 12volt Deep Cycle AGM battery, because they are made specifically for the job we want them to do.
Secondly I learned that the Ah (amp hours) of the battery should be closely matched to your Solar Panel output. For example: I bought a 12volt Deep Cycle 95Ah AGM battery and purchased a 100W Portable Solar Panel to go with it (from separate suppliers).
Other things I learned:
- You should only drain 80% of the battery power before recharging it. That is to say that you should leave the battery charged at no less 20% of its full charge. Doing this will extend the battery life. A battery metre comes in handy to monitor the battery voltage, and we already have one mounted to the wall in our caravan so we can monitor it easily.
- A 'sealed no maintainance battery' is not really a sealed battery at all, it has hidden vents that allow liquid to spill out of the battery. Don't be fooled by battery sales 'experts' - read the tech info below.
- click this link for more technical information about 12volt Deep Cycle AGM caravan batteries.