You should look at the Canadian Tire range of 12 Volt batteries, ask for a capacity of 100-120 Ahrs. You can hook as many batteries as you wish to your system, hooking up multiple panels is limited by the size of the solar charge controller. This is normally listed in Amps (7,8.5,10 or 30). You can add a larger controller as you build your system.
answered 5 months ago