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Generator & Backup

Generators

Portable Generators for Home Backup

Open-frame machines: the most running watts per dollar, and the class most homes should buy from.

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Westinghouse WGen9500DF 12,500W Dual Fuel

If you are buying one generator to keep a house running, this is almost certainly the category. Open-frame conventional generators give you more running watts per dollar than anything else, they are simple enough to service in a driveway, and the 8,000-to-10,000 running-watt machines here will carry an entire essential-circuit panel.

What you give up is noise and refinement. These machines run their engines at a fixed 3,600 rpm whatever the load, so a portable generator at 20% load sounds much the same as one at 90%. If that matters — close neighbors, a long outage, a bedroom near the driveway — look at inverter generators instead and accept fewer watts for the money.

How this category divides

  • 8,000 - 11,500 running watts. Whole essential panel, usually plus a well pump. Needs a 50 A transfer switch or an interlock kit to deliver its full output. This is where the main roundup sits.
  • 5,000 - 6,500 running watts. Every essential circuit through a 30 A switch, no central air. The size most people actually need, and the value roundup covers it.
  • Under 4,000 running watts. Cord-based backup for a fridge and a few lights. Reasonable, but at this size a battery power station is often the better machine.

What decides the price inside this class

Four things, roughly in order of how much they add:

Where the money goes

Running watts
The dominant factor
Fuel count
Dual fuel, then tri-fuel
Start method
Recoil, electric, then remote
CO shutdown
Increasingly standard, not universal

Remote start sounds like a luxury and is not: it means starting the generator without going out into the weather that caused the outage.

The carbon monoxide shutdown deserves a specific note. Several machines in this class still ship without one, including some otherwise excellent units — the Westinghouse WGen9500DF and the DuroMax XP13000EH among them. A CO shutdown is a worthwhile backstop, but it is not a substitute for placement: it protects the generator's operating area, not your bedroom. You still need a battery-powered CO alarm indoors.

The mistake buyers make here

They compare peak watts. Peak is a figure a generator can hold for a second or two to get a motor turning — it is not capacity. A machine sold as 13,000 watts may have 10,500 running watts, and a machine sold as 12,500 may have 9,500. The honest brands publish both on both fuels; where a manufacturer only shouts the peak figure, our product entries say so.

The second mistake is weight. These machines run from roughly 130 lb to 345 lb, and the wheel kits are designed for flat, dry ground. A 245 lb generator that has to cross a lawn in a storm is a two-person job every single time. If the generator will live where it runs, weight does not matter. If it has to be moved, it matters enormously.

Start with the main home backup roundup, and if you have a well pump read best generator for a well pump first — the surge demand there changes the answer.

Picks

Portable Generators picks

Each tile carries the top pick from that page with a live price, so you can act from here rather than having to read a review first.

Questions people actually ask

What size portable generator is best for home backup?

For a house on gas heat with no central air, 5,000 to 6,500 running watts covers every essential circuit. Add a well pump and you want 8,000 or more to handle its surge comfortably. Only central air or electric heat pushes you above 11,000. Work it out with the sizing calculator rather than buying by instinct.

Are portable generators loud?

Yes, by comparison. Conventional open-frame machines run at a fixed engine speed regardless of load. Westinghouse publishes 74 dBA for its largest V-twin, which is quiet for the output but still clearly audible next door. Inverter generators in the same output range publish figures in the low 60s and vary with load.

Can I plug my house into a portable generator with an extension cord?

You can run individual appliances on cords, but not the house. Hard-wired loads — the furnace, the well pump, the sump pump — cannot be reached by a cord, and back-feeding a dryer outlet is extremely dangerous. The correct connection is a transfer switch or an interlock kit, installed by an electrician.

How long will a portable generator run on a tank?

The published figures on the machines here range from about 8.5 hours at half load to 19 hours at a quarter load, depending on tank size and engine. Runtime at your actual load will differ; the honest way to plan is from the manufacturer's half-load figure and a refueling plan for the middle of the night.

Do portable generators need a carbon monoxide shutdown?

It is a genuinely valuable feature and increasingly standard, but it is not a substitute for correct placement. The shutdown protects the generator's immediate operating area; the thing protecting your household is siting the machine at least 20 feet from the house and having a battery CO alarm indoors.