Use this solar generator runtime calculator to estimate how long your solar generator will power essential devices during an outage.
Enter your battery capacity and appliances to calculate runtime and plan your emergency power with confidence instantly.

How Long Will a Solar Generator Last?

A solar generator can last anywhere from 2 hours to over 24 hours, depending on battery capacity and power usage. Smaller units power basic devices for a few hours, while larger high-capacity systems can run essential appliances overnight or longer.
Use a solar generator runtime calculator to estimate your exact runtime.

What Is a Solar Generator Runtime Calculator?

A solar generator runtime calculator helps you estimate how long your battery-powered generator will run during a power outage. By calculating total device wattage and comparing it to your battery capacity, you can determine whether your system will meet your emergency needs.

How Solar Generator Runtime Works (Calculator Explained)

The formula is simple:

👉 Runtime (hours) = Battery Capacity (Wh) ÷ Total Watt Usage (W)

Example:

• Battery: 2000Wh
• Devices: 400W
• Runtime: 5 hours

How Long Will a Solar Generator Last Based on Battery Size?

What Can a Solar Generator Power?

• Refrigerator
• Lights
• Phone chargers
• Laptops
• Medical devices (CPAP)
• Small appliances

👉 The more devices you run, the faster your battery drains.

Use the Solar Generator Runtime Calculator