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When determining the minimum power output in kilowatts (kW) required from the batteries, the conservative approach would be looking at how much instantaneous power all of large appliances would need if the batteries became their only power source during an outage. A homeowner would be able to run all appliances together if the total battery output (kW) is over the total power of the house appliances. A single FranklinWH aPower outputs 10 kW continuous power, surged at 20 kW for 10 seconds. With a 185 LRA, a single battery start a 5-ton AC.

Because of the large power output of the FranklinWH aPowers, in most cases 1 aPower battery will provide enough continuous and instantaneous power output for all of their house appliances.