Emergency power basics
Winter Power Outage Prep: Generator vs Portable Power Station, and the Safety Rules That Matter Most
Heavy snow and ice bring down branches and power lines, and a winter outage is a different animal from a summer one: the house gets cold, pipes can freeze, and people reach for whatever will make heat. This guide covers the basics of backup power for a snow-country home, with the safety rules up front, because the most dangerous part of a winter outage is often the equipment people use to get through it.
The non-negotiable safety rules
Every winter, people are poisoned by carbon monoxide (CO) during outages. CO is invisible and odorless, and early symptoms such as headache, dizziness, nausea and confusion are easy to mistake for flu or tiredness. These rules come from public-health and safety agencies, and they are worth reading twice:
- Generators go outdoors only. Not in the garage, not in the basement, not in a shed, not on an enclosed porch. Opening a garage door or window does not make it safe.
- Keep the generator well away from the house. The U.S. CDC advises placing it more than 20 feet from your home, doors and windows. Point the exhaust away from the building and away from any neighbor's openings. Check your generator's manual and local guidance too.
- Never use a grill, camp stove, charcoal or a gas oven to heat the house. These are not designed for indoor heating and can produce dangerous levels of CO.
- Install CO alarms with battery power or battery backup on every level and near sleeping areas. Test them before winter.
- If a CO alarm sounds or anyone feels sick, get everyone into fresh air immediately and call 911 or your local emergency number.
- Never backfeed power by plugging a generator into a household outlet. It can energize utility lines and kill line workers or neighbors, and it can damage your home's wiring.
Your backup power options compared
| Portable power station | Portable gas generator | Inverter generator | Standby generator | |
|---|---|---|---|---|
| What it is | Rechargeable battery pack with outlets | Engine-driven open-frame unit | Quieter engine unit with cleaner output | Permanently installed, starts automatically |
| Where it runs | Indoors OK (per manual) | Outdoors only | Outdoors only | Outdoors, installed by pros |
| Fuel | Wall, car or solar charging | Gasoline (some dual-fuel) | Gasoline (some dual-fuel) | Natural gas or propane |
| Good for | Phones, lights, modem, CPAP, short fridge runs | Fridge, freezer, sump pump, some circuits | Same, plus sensitive electronics | Most or all of the house |
| Noise | Near silent | Loud | Quieter | Moderate |
| Main drawback | Limited capacity; recharging in a long outage | Fuel storage, CO risk, noise, maintenance | Higher cost per watt | Cost and professional installation |
Many households end up with a combination: a power station for indoor essentials and overnight quiet, plus a generator outside to run the fridge, freezer or furnace circuit and to recharge the power station during the day.
Portable power stations: what they can and cannot do
A power station is a large lithium battery with AC outlets, USB ports and often a 12-volt car-style socket. Because there is no engine, there are no fumes, and most manufacturers allow indoor use. That makes them the easiest piece of backup power for most people to own.
How to size one
Two numbers matter:
- Capacity (watt-hours, Wh): how much energy is stored. More Wh means longer runtime.
- Output (watts, W): how much it can deliver at once. It has to exceed the combined draw of everything plugged in, including the startup surge of things like refrigerator compressors.
A rough runtime estimate is capacity divided by the load, minus some loss for conversion. For example, a device drawing 50 watts on a 1,000 Wh station would run for something under 20 hours. Check the wattage label on each device you plan to run and add them up.
What it is not for
Resistive heaters, electric space heaters, ovens and other high-wattage heating appliances drain a power station very quickly. A power station is for keeping essentials running, not for heating rooms.
Gas generators: more power, more responsibility
A generator can run a refrigerator, a chest freezer, a sump pump and, with the right connection, a furnace blower or well pump. That capacity is why many snow-country homes keep one. The trade-off is that a generator brings fuel, exhaust and maintenance with it.
Connecting it to your house
The safe options are heavy-duty, outdoor-rated extension cords run to individual appliances, or a transfer switch or interlock kit installed by a licensed electrician that lets you power selected household circuits. Many gas furnaces and boilers are hard-wired and need the transfer switch route; ask your electrician and furnace manufacturer what yours needs.
Inverter vs conventional
Inverter generators are typically quieter and produce cleaner power that is friendlier to electronics. Conventional open-frame units usually give more watts for the money. Either way, size by adding the running watts of what you want to power, plus the largest startup surge.
Winter-specific tips
- Clear a flat spot for the generator before the storm, away from the house and where snow will not bury the air intake or exhaust. Some manufacturers sell or recommend covers or tents designed for operation in bad weather; use only what your manual allows.
- Store fuel outside the living space in approved containers, add stabilizer to stored gas, and refuel only with the engine off and cooled.
- Start and run the generator every so often between storms per the manual, so you know it works before you need it. Do this outdoors, too.
Staying warm without making things worse
- Close off rooms you are not using and gather in one room with the fewest windows. Hang blankets over doorways if needed.
- Layer clothing, wear a hat, and use sleeping bags rated for cold.
- Only use fuel-burning space heaters that are specifically rated for indoor use, follow the manual's ventilation requirements, and keep a CO alarm in the room. Keep anything flammable well away from any heater.
- Watch for signs of hypothermia, especially in older adults, babies and anyone with health conditions. If someone is very cold, confused or drowsy, get medical help.
- If the outage looks long and the house is getting cold, consider going to a warming center or a friend's home with power. Your local emergency management office or utility usually announces warming centers.
Protecting pipes and food
Pipes
Pipes in exterior walls, crawlspaces and unheated areas are most at risk. Know where your main water shutoff is before winter. If the house is going to stay cold for a long time, a plumber can advise on draining lines; turn off the water heater per its manual before draining it.
Food
USDA food-safety guidance says a closed refrigerator keeps food safe for about 4 hours, and a full freezer holds its temperature for about 48 hours (about 24 if half full), as long as the doors stay shut. An appliance thermometer takes the guesswork out. Do not put food outside in the snow unless you can be sure it stays cold and out of sun and animals; temperatures can swing.
Outage kit checklist
- Battery CO alarms on every level, tested
- Flashlights and headlamps with spare batteries (no candles near curtains or kids)
- Power station or power bank, charged and topped off before storms
- Battery or hand-crank weather radio
- Extra blankets, sleeping bags, hats and gloves
- Water for drinking and sanitation
- Food that needs no cooking
- Fridge and freezer thermometers
- Medications and any power-dependent medical device plan (ask your provider and utility about medical priority programs)
- Generator fuel stored safely, with stabilizer, plus extension cords rated for the load
- Your utility's outage reporting number and app
FAQ
Can I run a generator in my garage with the door open?
No. Carbon monoxide can build up to dangerous levels even with the garage door open. Run generators outdoors only, well away from doors, windows and vents.
Is a portable power station safe to use indoors?
Most are designed for indoor use because they have no engine or exhaust. Follow the manufacturer's instructions, keep vents clear, and do not cover it while charging or running.
Can a power station run a space heater?
Only briefly at best. Electric heaters draw a lot of power and will drain most power stations quickly. Use power stations for essentials like lights, phones, a modem and medical devices.
How do I connect a generator to my furnace?
Many furnaces are hard-wired, so the safe route is a transfer switch or interlock installed by a licensed electrician. Never plug a generator into a wall outlet to backfeed the house.
The bottom line
Start with the cheap, lifesaving basics: CO alarms, lights, warm layers and a plan. Add a portable power station for quiet indoor essentials. If you need to run the fridge, sump pump or furnace through a long outage, add a generator that lives outside and connects through a proper transfer switch. Whatever you own, the rules are the same: engines outside, far from the house, and no grills or stoves for heat.