We ended up changing out our original 2. 12 volt, with in the first week we picked it up, CW failed to maintain them while it was on there lot. We opted for 2. 12 volt flooded golf cart deep cycle, they just fit in under the step on the 35sk. This spring will be installing a tray in the compartment next to the inverter compartment, for ease of maintaining. They do the job running the residential fridge over night plus.