They can be charged from any source of electricity, which makes them an ideal addition to a solar energy system.
There are different battery backup designs aimed at meeting various needs, for both short-term and long-term relief from an outage.
Generators are small and sometimes portable power plants. They require combustible fuel to produce power. They can be integrated to start automatically or manually depending on the level of security and response needed.
When generators are chosen, the power production must match the designed home energy usage per hour. As set by the size or capacity, the generator can
continuously supply a level of electricity as long as fuel is available. If using an existing supply piped to the home, duration is technically unlimited. Many small
and especially portable generators require that a tank level be maintained.
Battery backup systems can be charged from the grid. However, their capacity is limited to the discharge limits allowed until the grid power is active again to
recharge. A solar energy system plus battery backup significantly improves the versatility. Often storm related outages are followed by clearing skies. A solar
energy plus backup can be designed to extend the available battery power in those circumstances.