Updated September 27, 2026.
Plan backup power before an outage
Backup power starts with the loads you need to protect and a safe way to supply them. Portable generators, permanently installed standby generators, and batteries have different installation and operating requirements.
Portable generator safety
- Operate portable generators outdoors only, at least 20 feet from homes and buildings. Point exhaust away from windows, doors, and vents.
- Never operate one inside a home, garage, basement, crawlspace, shed, or other enclosed space—even with doors or windows open.
- Follow the generator manufacturer’s instructions, including wet-weather precautions. Install and maintain carbon monoxide alarms on every level and outside sleeping areas; test them monthly.
- Shut the generator off and let it cool before refueling. Use only correctly rated, undamaged cords and keep connections dry.
Read the CPSC generator safety guidance and your equipment manual before operation.
Never backfeed through a wall outlet
Do not connect a generator to a household receptacle. Backfeeding can endanger occupants and utility workers. Have a licensed electrician design and install the appropriate transfer equipment before connecting a generator to building wiring. A transfer switch separates the utility supply from the generator supply; installation must meet applicable electrical requirements.
The American Red Cross generator safety guide explains safe connection precautions.
Standby generators need a site-specific design
The portable-generator guidance above is not a universal setback for permanently installed standby equipment. Standby placement, fuel supply, transfer controls, and clearances must follow the specific manufacturer’s instructions and applicable local requirements.
Capacity and load management determine which equipment can run together. Tell us about medical equipment or other loads that cannot tolerate an interruption so their requirements can be considered separately.
Plan your home’s backup system
BD Electrical & Solar can assess your electrical system and discuss generator, battery, and compatible integrated backup options.