Autonomy needs vary, but often the system will be supported by a generator when lengthy duration blackouts are expected. Often the size of the battery storage room or closet dictates the configuration of the battery system. Temperature is not usually a concern. Access is usually not a concern, but many homeowners would prefer to live without the complications of battery maintenance. Safety and fire suppression should be a paramount consideration for in the home installations.

If combined with solar, the whole home backup system will likely be used to take the home ‘off the grid’ to increase self-consumption. If allowed, the inverter’s grid sell functionality will be used to lower energy purchase costs. If this is the case, the battery will be regularly cycled and may be continually operated in a partial state of charge condition (PSOC). Battery charge efficiency and monitoring of lifetime battery energy throughput will be of significant value to homeowners and grid management company.