One of the key decisions is do you get a single battery or a battery bank. A single 300Ah Lithium battery has the following advantages: 1. Takes up less space (potentially a lot less space) 2. Easier to install and move around 3. Less wiring causing untidiness and hassle to deal with 4. Lighter (though perhaps. If you've decided on a single 300Ah battery, those are the 2 best batteries on the market of that size. The LiGen provides more power, and we deem its BMS to be one of the market leaders. LiGen are a highly respected maker as well. The Beyond Batteries. Frankly, the LiFePO4 Lithium (the type of Lithium used in each battery on this list) is better than lead-acid batteries in every single way. It's more.