Best Portable Generator for Home Backup (Sizing and Safety)

A generator is one of the best pieces of storm-season insurance you can own — and also the piece of equipment most likely to hurt someone when it is used wrong. Let's do both halves: pick the right one, and connect it the right way.

Start with sizing, not price

Buy watts you need, not watts a salesman sells. Two numbers matter:

• Running (rated) watts — what a device draws continuously.
• Starting (surge) watts — the brief spike when a motor (fridge, furnace, pump, A/C) kicks on, often 2-3x its running watts.

Add up the running watts of everything you want on at once, then make sure the generator's starting capacity covers your biggest motor starting while everything else runs. For essentials — fridge, furnace blower, some lights, phones, maybe a well pump — many homes are well served by a 5,000-7,500 watt unit. Add central A/C and the number jumps.

Inverter vs. conventional

• Inverter generators make clean, stable power that's kind to electronics and modern appliance control boards, run noticeably quieter, and throttle down to save fuel at light load. Look at an inverter generator sized for home backup.
• Conventional generators give you more raw watts per dollar and are perfectly fine for pumps, heaters, and lights. A larger conventional generator covers heavier loads for less money.

The connection: this is the part that matters most

Here is the rule that never bends: never plug a generator into a wall outlet to power your house. That "suicide cord" back-feeds your wiring, can electrocute a lineman miles away, and can burn your house down when utility power returns.

The two safe, legal ways — both installed by a licensed electrician:

• A manual transfer switch, which powers a chosen set of circuits and isolates them from the grid.
• A listed panel interlock kit, a sliding plate that makes back-feeding physically impossible.

Then run power from the generator to the inlet with a proper generator inlet cord — not a daisy chain of household extension cords.

Carbon monoxide: the silent one

Generators pour out carbon monoxide. Run them outdoors only, at least 20 feet from the house, away from any window or door — never in a garage, even with the door open. Then back it up with a battery CO alarm on every level. Every storm season, CO from generators kills people who were just trying to stay warm. Don't be a statistic.

Bottom line

Size for the loads you actually need, favor an inverter if you'll run electronics, and spend the money to have an electrician install a transfer switch or interlock. The generator is the easy part; the safe connection is what keeps your family — and the crew fixing your power — alive.

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