Home battery capacity, defined in kilowatt-hours (kWh), indicates the amount of electric energy that a battery can store. There are different capacities to meet the energy needs of different households. Smaller-capacity batteries are useful for operating some essential appliances for a short period, while larger-capacity batteries can enable a home to function independently for extended periods. To ensure that the battery capacity meets the energy needs of the home, it is important to consider average daily energy consumption, backup power needs, and budgetary constraints.