Portable Generator Safety for Marin Homeowners

Two mistakes are genuinely deadly. The first is carbon monoxide poisoning from running a generator indoors, in a garage, or too close to the home — generators produce CO in lethal amounts, and people die from this every storm season. Always run one outdoors, well away from the house, with exhaust directed away from windows, doors, and vents. The second is backfeeding — plugging a generator into a wall outlet — which can electrocute utility workers and start fires. Both are entirely preventable by following proper procedures, and both are why safe generator use is worth taking seriously rather than improvising.

Outdoors only, positioned well away from the house — not in a garage (even with the door open), not on a porch, and not near windows, doors, or vents where exhaust could drift inside. The exhaust should point away from the home and any openings. Carbon monoxide is invisible and odorless, and it accumulates quickly in enclosed or partially enclosed spaces, so “outdoors, far away, exhaust pointed away” is the firm rule. A CO alarm in the home adds a layer of protection, but proper placement is the primary safeguard. Never compromise on this to keep the generator closer or more convenient.

No — never. This practice, called backfeeding, is extremely dangerous. Plugging a generator into a regular outlet energizes your home’s wiring and can send power back onto the utility grid, potentially electrocuting utility workers who are restoring power and believe the lines are dead. It also bypasses your home’s safety protections, risking fires and equipment damage. The safe ways to use a generator are running appliances directly off it with heavy-duty outdoor-rated extension cords, or powering home circuits through a transfer switch installed by a licensed electrician. Backfeeding is never an acceptable shortcut.

A transfer switch is equipment installed by an electrician that safely connects a generator to your home’s electrical circuits while isolating them from the utility grid — eliminating the backfeed danger. It’s the proper, safe way to power home circuits (not just individual appliances) from a generator. You need one if you want to power your home’s wiring — outlets, hardwired appliances, lighting circuits — rather than just running things off extension cords plugged into the generator. For anyone relying on a generator for meaningful home backup, a professionally installed transfer switch is essential both for safety and for practical, convenient operation.

Store gasoline in approved fuel containers, kept away from living spaces and any ignition sources like water heaters or heaters. Critically, never refuel a generator while it’s running or still hot — spilled gasoline on hot metal can ignite. Turn the generator off and let it cool before refueling. Keep only the amount of fuel you’ll reasonably and safely use, and be mindful that stored gasoline degrades over time. Following these handling basics prevents fires and burns. If managing fuel storage and hot refueling feels risky, a natural-gas or propane standby generator avoids much of the manual fuel handling altogether.

In terms of the two big risks, yes — a professionally installed standby generator largely designs them out. It’s permanently placed outdoors with proper exhaust, connects through a transfer switch (no backfeed risk), and typically runs on natural gas or propane (no manual gasoline handling or hot refueling). It also starts automatically. A portable generator can be used safely by strictly following the rules, but it depends on the user getting placement, connection, and fueling right every time. For homeowners who want reliable, low-risk, hands-off backup power, a standby generator with a transfer switch is the safer, more convenient option.