Generator Glossary and FAQ
Here are the terms you will meet while shopping, followed by answers to the questions people ask most.
Glossary
| Term | Meaning |
|---|---|
| Amp (A) | A measure of electrical current |
| Automatic transfer switch (ATS) | A switch that detects an outage and moves your home to generator power on its own |
| Carbon monoxide (CO) | A deadly, odorless gas in engine exhaust |
| dB (decibel) | A unit of loudness; every 10 dB sounds about twice as loud |
| Dual-fuel | A generator that runs on gasoline or propane |
| GFCI | An outlet that cuts power fast when it detects a shock hazard |
| Interlock kit | A plate on your main panel that stops the main and generator breakers from being on together |
| Inverter | Electronics that turn raw power into clean, stable AC power |
| kW and kWh | Kilowatts (1,000 watts) and kilowatt-hours (1,000 watt-hours) |
| LiFePO4 | Lithium iron phosphate, a long-lasting battery chemistry used in many power stations |
| MPPT | A solar charge controller that squeezes more energy from panels |
| Open-frame | A generator with an exposed metal frame around the engine |
| Parallel capability | The ability to link two matching generators for more output |
| Rated (running) watts | The power a generator can supply continuously |
| Starting (surge, peak) watts | The short burst of power a generator can supply to start motors |
| Standby generator | A permanently installed generator that runs on natural gas or propane |
| THD | Total harmonic distortion; how far the power departs from clean utility power |
| Transfer switch | A switch that safely moves selected circuits between utility and generator power |
| Watt (W) | A measure of how fast power is used |
| Watt-hour (Wh) | A measure of stored or used energy: watts times hours |
Frequently asked questions
Can I run a generator in the rain?
Only under a proper cover that keeps water off the unit and still lets exhaust escape freely, such as a purpose-built generator tent or canopy. Never run one in a closed space.
Can a portable generator power my whole house?
Usually not. A large portable can run essentials. Whole-house power with central air and an electric range generally needs a standby generator.
How big a generator do I need to run a refrigerator?
A unit in the 1,000 to 2,000 watt class covers most fridges. Check the starting watts on your fridge's label (see our sizing guide).
Can I plug a power station or generator into a wall outlet to power my house?
No. That backfeeds the grid and is dangerous. Use a transfer switch or interlock installed by an electrician (see our home backup guide).
Is it safe to run a generator overnight?
A gas generator can run through the night if it stays outdoors, away from the house, with working CO alarms inside and enough fuel. Follow the maker's run-time guidance and refuel only after it cools.
Can I use a power station while it is charging?
Many models support this feature, often called pass-through charging. Check your manual, since some limit output while charging.
Can I take a power station on a plane?
Generally no. Airlines limit lithium batteries in carry-on bags to 100 Wh without airline approval (up to 160 Wh with approval), and most power stations are far larger.
Will a generator damage my electronics?
Inverter generators and power stations produce clean power that is safe for electronics. Conventional units can be harder on sensitive devices, so use a surge protector or a power conditioner.
How long does a generator last?
With regular maintenance, many gas generators run for a thousand hours or more. Power station life depends on battery chemistry and use (see our maintenance guide).
Do I need a permit?
Permanent installations, including transfer switches and standby units, typically do. Portable use usually does not, but local rules and HOA rules can limit when and where you may run one. Check before you buy.
Have a question that isn't covered here? Contact us and we will help.
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