Independent home energy research

Home Backup Power Starts With the Loads You Need to Run

Backup power planning becomes much easier when you begin with appliances and runtime instead of starting with a product.

Safety note: Electrical work can cause shock, fire, equipment damage, or utility hazards. Use qualified professional help for household wiring, transfer equipment, and any grid connected work.

List critical loads

Write down the devices that matter during an outage. Refrigeration, medical equipment, communications, lighting, heating controls, pumps, and cooking needs can have very different power requirements.

Check running and starting watts

Motors and compressors can draw more power when starting. Use manufacturer specifications for each appliance and size equipment with appropriate headroom.

Choose an energy source

Fuel generators can provide substantial power as long as fuel is available. Batteries are quiet and convenient but have finite stored energy. Solar can recharge compatible battery systems when sunlight and array size are sufficient.

Plan the connection safely

A generator or DIY source should never backfeed utility lines. Household connections can require transfer equipment, permits, code compliant hardware, and a licensed electrician.

Test before an emergency

Whatever system you choose, test the actual loads and learn its operating limits before you need it.