BACKUP GENERATORS
Whole-House Generator Cost, Fuel Use and Alternatives
Plan for the full installed cost, ongoing fuel use and practical alternatives to a standby whole-house generator.
A whole-house generator budget must include the generator, transfer equipment, site preparation, permits, electrical and fuel work, commissioning and maintenance. Fuel consumption varies by model and load, so use the manufacturer’s load chart and local installed quotes rather than a national headline price.
- ✓ Installed cost is more than the generator price
- ✓ Fuel use changes with load
- ✓ An essentials-only system may cost and consume less
Build the complete installed budget
Ask qualified contractors for itemized quotes covering equipment, pad, trenching, transfer switch, panel work, gas or propane connection, permits, testing and taxes. Site distance and local code can materially change the total.
Estimate fuel at your expected load
List the circuits expected to run simultaneously and locate the specific model’s consumption at a comparable load. Multiply fuel per hour by the planned runtime and test more than one outage scenario.
- Include heating-system controls and pumps
- Account for well pumps and motor surge
- Plan periodic maintenance and exercise runs
- Follow carbon-monoxide and placement requirements
Compare lower-load alternatives
An essentials-only transfer system, portable generator used safely outdoors, portable battery or professionally integrated home battery may cover the real need with different cost and maintenance tradeoffs. Compare the same load list and outage duration across every option.
Actual energy use and product performance vary by equipment, conditions and installation. Confirm measurements and manufacturer specifications. Qualified professionals should handle permanent wiring and transfer equipment.