Home Solar Battery Backup Cost Calculator
Planning for a power outage or off-grid event? Estimate how much fuel your generator will burn and what it will cost.
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About this calculator
Estimate the fuel cost of running a backup generator based on wattage, runtime, fuel price, and fuel consumption rate.
Frequently Asked Questions
How do I find my generator's fuel consumption rate?
Check the manufacturer's spec sheet, usually listed in gallons per hour at 50% or 100% load.
Does load affect fuel consumption?
Yes, running at higher load draws more fuel per hour than running at lower load, so use an average consumption rate for your typical usage.
Is this cheaper than a home battery backup?
For short outages generators are often cheaper upfront, but battery backups can be more cost-effective over many years with no ongoing fuel cost.