How can I keep central AC running during a power outage?
Central air is one of the largest electrical loads in many homes. The question is not simply whether a generator or battery can power an AC—it is whether the complete system is sized for your equipment's running and startup demands.
Three common approaches
Standby generator
Often selected when long-duration whole-home backup is the priority and a suitable fuel supply is available.
Home battery
Quiet and automatic. Running large HVAC loads may require more battery capacity or load management.
Solar + battery
Adds the possibility of daytime recharging during an extended outage, subject to system design and solar conditions.
Have these details ready
- AC or heat-pump model and size
- Electrical panel/service size
- Whether you need one AC unit or multiple units
- Other essential loads: refrigerator, lights, medical equipment, internet, well/pool pumps, etc.
- Desired backup duration
Safety: generator and battery installations interact with a home's electrical system. Transfer equipment, permitting, ventilation and installation requirements should be handled according to applicable codes and manufacturer requirements.