How long can the PG4500iSR home backup generator run on 3.2 gallons at half load?

For that answer to hold, your connected load has to stay near half of its 3,700 running watts, so start by totaling the watts of the appliances you plan to run.

The PG4500iSR is a gasoline home backup generator, and we picked it out for a full review because its 3.2-gallon fuel tank and 3.4 average from 50 buyers make the runtime question worth a close look.

For a complete breakdown of performance, see our full review of the PG4500iSR.

What to Check Before Buying the PG4500iSR

• Check whether your appliances have motor starts or mostly resistive loads. Power factor changes with inductive equipment, so a fridge or blower can draw differently than lights or heaters.
• Check whether you need a low-fuel warning. The listing does not state an automatic fuel shut-off or warning system.
• Check your storage plan for gasoline. Fuel stabilizer helps gasoline stay usable during long storage, and this listing does not name a required additive.
• Check whether you want a remote start and a wheel kit. Those features matter if you plan to move the unit and start it from a distance.

Where the PG4500iSR Fits Among Home Backup Generator Options

PG4500iSR suits you if you want a portable 120-volt unit with 3,700 running watts, 4,500 starting watts, and a 3.2-gallon tank for shorter backup jobs. It is the kind of generator that can support essentials, but not the larger whole-home standby role tied to 14 kW, 18 kW, or 26 kW systems. That matters in a home backup generator because your outage plan often depends on whether you are covering a few circuits or trying to keep a larger house running without load juggling.

You can find more specific details in our Pulsar PG4500iSR review FAQ.

Choose PG4500iSR if you want a portable gasoline generator with remote start, five outlets, and a runtime figure that is already stated at half load. Look elsewhere if you need whole-home coverage, a larger fuel reserve, or a setup built around a transfer switch or interlock kit for a panel-level backup plan.

For extreme climates, look at the best home backup generator for cold weather.

Reviewed by the Predicament Measures editorial team.