Free standby generator tools

Turn "what size generator do I need?" into numbers. Every tool runs in your browser, and nothing you enter leaves your device.

kW Size Calculator

Check your essential loads and get the generator size in kW your home actually needs.

The true installed price: unit, labor, gas line, panel work, pad and permits.

10-year cost comparison plus the honest convenience trade-offs.

Every model side by side: power, fuel, transfer switch, noise and price. Sortable.

Maintenance kits, transfer switches, battery maintainers and cold-weather gear.