A backup power system will keep your home operational during grid power outages. A backup system is similar to an off-grid system, but backup systems differ by maintaining a grid power connection. Backup power systems may be sized smaller than an permanently off-grid system or have a partial backup configuration.
Backup systems typically offer 24 hours of power, but actual duration depends on the system size, seasonal changes, weather, home efficiency, and when energy is used. Proper energy management can keep critical appliances running indefinitely, or added to if power needs increase over time.
Backup power systems are typically configured in one of two ways:
Whole-House Backup (most common): This configuration backs up the entire home, including HVAC and well pumps.
Partial Backup: This option is used when it is necessary to separate essential loads, such as refrigeration, lighting, and power outlets, from Non-essential loads or loads that consume excessive power, such as electric heating, electric clothes dryers, and electric saunas, that will not be backed-up. An additional breaker panel may need to be installed for this purpose.
In addition to backup power, battery power systems offer additional features such as:
Storing extra solar energy from the daytime for use over night
Reducing demand from the grid
Reserving energy for use during peak times