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Watt Warden

Watt & Warden

Home Standby Generators and Transfer Switches

A permanently installed generator that starts itself when the grid fails. The most capable answer in this category, the most expensive, and the one you cannot buy in a box.

An electrical panel and breaker box mounted in a basement.

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Read this first: standby units themselves are sold through installers and dealers, not through us. We quote cited price ranges and put no buy button on a machine you cannot buy this way — here is the honest version of that roundup.

What we can genuinely help you buy is the connection — transfer switch versus interlock kit, which is the decision that also matters if you go the portable route.

Weighing a battery instead? Standby generator versus home battery is the comparison most people actually need.

Everything in home standby

What standby means

A standby generator is bolted to a pad outside the house and wired permanently into the electrical panel through an automatic transfer switch. It monitors the grid. When it detects a failure, it starts itself, waits for the engine to stabilize, and transfers the house — or a selected group of circuits — onto generator power. Typically the whole sequence takes under thirty seconds and nobody has to go outside in the rain.

Most run on natural gas or propane. Natural gas is the significant one: a house on a gas main has an effectively unlimited fuel supply, which removes the constraint that defines every other option in this category. No cans, no trips, no rationing on day three.

Why this hub does not look like the others

We are open about this. Whole-house standby units are sold through dealer and installer channels, and the installation is not optional — it involves a gas line, a concrete pad, a permit and a licensed electrician tying into your service panel. You cannot meaningfully buy one the way you buy a portable generator.

So this hub does two things instead of pretending otherwise. It quotes installed cost as cited ranges from real sources and never as a single confident figure, because the real number depends on your gas line, your panel, your local permit costs and your ground. And it covers the parts you genuinely can buy and genuinely need: transfer switches, interlock kits, generator cords, carbon monoxide alarms. Putting a buy button on a machine that cannot be bought through it would be the same fabrication as inventing a price.

The comparison nobody frames honestly

A standby installation is a five-figure decision. A large dual-fuel portable plus a professionally fitted transfer switch delivers a substantial fraction of the same capability for a fraction of the cost. What you give up is real and worth naming:

  • Automatic start. A portable needs someone to go out, start it, and throw the switch. If nobody is home, or the person home cannot lift a fuel can, that matters enormously.
  • Unlimited fuel. Natural gas does not run out. A portable runs on what you can carry and store.
  • Weather-proof operation. A standby unit is in a fixed enclosure designed to run in a storm. A portable needs a cover, a location and a person to set it up in the weather.
  • Capacity. Standby units routinely cover central air conditioning. Most portables do not.

What you gain by going portable, besides the money: the machine is useful for camping, a jobsite, and a different house later. It needs no permit. And it does not require a gas line you may not have.

Sizing standby is a different exercise

With a portable you size to a critical-load list. With standby you are usually choosing between covering selected circuits and covering the whole service, and the second option has to account for the largest motor in the house starting under generator power — normally the central air conditioner, whose compressor surge Champion's reference puts at 3,500–4,500W for a two-ton unit and 5,000–6,000W for a three-ton.

That is the calculation the installer will do at the site visit and it is genuinely their job, because it depends on your panel and your equipment. What you should arrive knowing is your own list: what absolutely must run, what would be nice, and what you are happy to switch off. Turning up with that list is what stops you being sold two sizes more machine than the house needs.

The accessory nobody budgets for

Whichever route you take, the connection hardware is a real line item and it is routinely forgotten. A ten-circuit manual transfer switch kit, the cord to reach it and a working carbon monoxide alarm are all required for a portable installation to be safe and legal, and the electrician's time to fit the switch is usually more than the switch. Budget for it up front rather than discovering it the week the storm is forecast.

Questions people actually ask

How much does a whole-house generator cost installed?

It varies too much for a single number to be honest. The unit, the transfer switch, the concrete pad, the gas line, the electrical work and the permit are separate costs, and the gas line in particular depends entirely on how far the meter is from the pad. Get at least two itemized local quotes -- any national figure, including one from us, would be a guess dressed as a fact.

Can I install a transfer switch myself?

It ties directly into your service panel, so in most jurisdictions it requires a licensed electrician and a permit. Even where DIY is permitted, this is live-panel work where a mistake is fatal. The switch itself is affordable; the labor is the real cost and it is worth paying.

Does a standby generator run on natural gas?

Most do, and it is the main practical advantage: a house on a gas main has effectively unlimited fuel, so runtime is not a constraint. Propane models exist for houses without a gas connection, but then you are back to a tank with a finite capacity.

Not sure which of these you need? Work out the number first — capacity falls out of how long your power is usually off, not out of a budget.

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