Solar Backup Power: What You Can Run During an Outage

Solar backup power can provide reliable electricity during outages, but understanding what it can and cannot run is critical for setting realistic expectations.

What Solar Backup Is Designed For

Backup solar systems are best suited for essential loads, such as:

• Refrigerators and freezers
• Lights and outlets
• WiFi routers and communication devices
• Medical equipment (with proper sizing)
• TVs, laptops, and phones

These systems prioritize continuity, not whole-home luxury power.

What Typically Requires Larger Systems

High-energy appliances require significantly more power, including:

• Central air conditioning
• Electric water heaters
• Electric dryers
• Large electric ranges

Running these loads is possible, but only with large battery banks and higher-capacity systems, which increases cost and complexity.

Factors That Affect Runtime

Backup duration depends on:

• Battery capacity (kWh)
• Energy consumption of connected devices
• Solar production during daylight
• Weather conditions

For example, a refrigerator may run for days on a properly sized system, while multiple high-wattage appliances can drain batteries quickly.

Solar vs Generators

Unlike generators, solar systems:

• Do not require fuel
• Operate silently
• Can recharge daily with sunlight

However, generators may still be useful for short-term, high-load scenarios. Many homeowners use solar as a primary backup and generators as a secondary option.

Bottom line: Solar backup power is ideal for keeping essentials running safely and quietly during outages when systems are sized realistically.