- Commonly used household uninterruptible power supplies (UPS) have a capacity ranging from 3kWh to under 20kWh, usually including an AC/DC inverter with grid input (AC) and solar power (Hybrid Inverter) along with a battery/accumulator. In practice, many families have now installed solar systems including solar panels and hybrid inverters to consume electricity themselves and supply surplus electricity back to the public grid. In this case, they only need to invest in a battery/accumulator with a capacity suitable for the solar system and the family's electricity consumption needs to optimize investment costs.