A very convenient size that only weighs 50 pounds, these are modular power blocks that you can use to have reliable 24 volt or 48 volt storage scalabale to any capacity.

Each battery is either a 50 Ah 48V or a 100 Ah 24V battery. The power capacity is the same (2.56 kWh storage). If you are using for a 48 volt system of course get the 48V version, if you have 24V needs you get that one. The total amount of energy storage is the same just select the right voltage.