Tesla’s Powerwall product has faced new competitors, with Sonnen introducing its own home backup battery that allows users to get reliable temporary power when the grid is down. The product, called SonnenCore Home Battery, can be integrated into a solar power system in a home to charge, and if a conventional power supply is lost, the automatic switch switches the house to a battery-powered unit, whether due to an accident or a planned power outage.
This switch is done in about 0.4 seconds, and its speed may not be noticed by most appliances. The battery has a usable capacity of 10 kW and can continuously output 4.8 kW of power. Its peak output is 8.6 kilowatts to meet the immediate power requirements of some appliances and equipment at first start-up.
The lithium iron phosphate battery itself has a rated life of 10,000 cycles, or 10 years. Sonnen says it has a life expectancy throughput of 58MWh and a discharge depth of 100%. While home backup cells such as Powerwall and SonnenCore are often associated with solar panel systems, they don’t actually need to get energy from photovoltaic resources.
SonnenCore’s home battery can be charged from the regular grid and used as a backup battery in the event of a power outage, sonnen said, and can also be used for time load transfer. In other words, users can charge it with off-peak, cheaper energy, and when grid power is more expensive, users can let SonnenCore home batteries work to power appliances in their homes.
SonnenCore home batteries come with remote applications for control and monitoring, setting charging and peak hours, and showing how much energy is being used and how much energy is being stored. It also supports combining multiple SonnenCore batteries to meet household or other buildings with greater power needs. SonnenCore home batteries cost $9,500 per device, excluding installation costs.