Home electric generators are battery-powered backup systems that store electricity and release it when the grid goes down, with no engine, no fuel and no exhaust. Shops call them power stations, solar generators or battery generators. They have become a real alternative to a gasoline generator for many homes.
The appeal is obvious. You can run one in your living room. It makes no noise. It needs no oil changes and no trips for gasoline. For an apartment, or a home where a fuel generator cannot be run safely, it may be the only sensible choice.
The limit is just as clear. A battery holds a fixed amount of energy. When it is empty, it has to be recharged. This guide explains how to tell whether that limit matters for you. You will learn the two numbers that describe every battery, how to work out run time, how these systems charge, how they compare with fuel generators and which models are worth a look. Product figures come from the makers’ listings. We have not tested these products.
Home electric generators at a glance
Silent, indoor-safe power that lasts as long as its battery
Product figures are from makers’ Amazon listings, checked October 2026. Run times are our arithmetic.
Quick answer
A home electric generator is a battery with outlets. Its capacity, in watt-hours, tells you how long it lasts, and its output, in watts, tells you how much it can run at once. A 1,000 watt-hour unit keeps a refrigerator, lights and a router going for most of a day. A 3,600 to 4,000 watt-hour unit covers essentials for a day or more, and larger ones can feed a transfer switch. They are silent and safe indoors. For outages longer than a day or two, you need solar panels to recharge them, or a fuel generator.
How we put this guide together
We have not tested these products. Specifications come from the makers’ Amazon listings, checked in October 2026. Figures for an installed home battery come from Generac’s published specification guide. Average household electricity use is from the US Energy Information Administration. Run-time tables are our own arithmetic, with an allowance for losses, and real results depend on the appliance, the temperature and the age of the battery. Makers’ claims are labeled as such.
In this guide
- What Is a Home Electric Generator?
- The Two Numbers That Matter
- How Long Will a Battery Run Your Home?
- How Home Electric Generators Recharge
- Electric or Fuel Generator: An Honest Comparison
- Connecting a Power Station to Your Home
- Installed Home Batteries
- Safety With Battery Systems
- Five Home Electric Generators Worth a Look
- Common Mistakes With Home Electric Generators (and the Fix)
- Pro Tips for Battery Backup
- Real-Life Scenarios: Which Backup Fits?
- Home Electric Generators: FAQ
- Your Home Electric Generator Checklist
What Is a Home Electric Generator?
The name is a little misleading. A fuel generator makes electricity by burning gasoline, propane or natural gas. An electric generator of the battery kind stores electricity that was made somewhere else: at the power plant, or on your roof.
Inside the case are three things.
- A battery. Almost all current models use lithium iron phosphate cells, often written LFP or LiFePO4. This chemistry is valued for long life and stability.
- An inverter. It turns the battery’s direct current into the alternating current that household appliances use.
- A charger and controls. These manage charging from a wall outlet, solar panels, a car or a generator.
On the outside are ordinary outlets, USB ports and a display.
Two families
Portable power stations have a handle or wheels and plug into the wall to charge. They range from pocket-size units to wheeled machines that weigh over 100 pounds.
Installed home batteries are fixed to a wall or a pad and wired into the electrical panel by a licensed installer. They are usually paired with solar panels.
What about fuel generators?
Some people use “electric generator” to mean any generator that makes electricity for a home, including gasoline and standby units. If that is what you are looking for, our guides to generators for home use and portable vs standby generators cover them. This guide is about the battery kind, and how it compares.
The Two Numbers That Matter
Every battery system has two ratings. They answer different questions, and buyers mix them up all the time.
Watt-hours (Wh), or kilowatt-hours (kWh), is capacity. It is how much energy the battery holds. It decides how long things run. One kilowatt-hour is 1,000 watt-hours.
Watts (W) is output. It is how much power the unit can deliver at one moment. It decides how many things can run together, and whether a big appliance can run at all.
A simple way to remember it: watt-hours are the size of the fuel tank, and watts are the size of the engine.
| Model | Capacity | AC output | Voltage | Expandable to |
|---|---|---|---|---|
| Jackery Explorer 1000 v2 | 1,070 Wh | 1,500 W | 120 V | Not stated |
| Jackery HomePower 3600 Plus | 3,584 Wh | 3,600 W | 120 V, or 240 V with two units | 21 kWh |
| EcoFlow DELTA Pro | 3,600 Wh | 3,600 W | 120 V, or 7,200 W with two units | With extra batteries |
| Anker SOLIX F3800 | 3,840 Wh | 6,000 W | 120/240 V | 26.9 kWh |
| EcoFlow DELTA Pro 3 | 4,096 Wh | 4,000 W | 120/240 V | 48 kWh |
How Long Will a Battery Run Your Home?
The arithmetic is short.
- Find the watts your appliances use. Read the label, or measure with a plug-in power meter.
- Multiply by the hours you need. A 100-watt load for 10 hours is 1,000 watt-hours.
- Allow for losses. The inverter uses some energy. As a rule of thumb, plan on getting about 85% of the rated capacity.
- Compare with the battery. A 1,070 watt-hour unit delivers roughly 900 usable watt-hours.
Appliances with a compressor, such as a refrigerator, cycle on and off. They draw power for only part of each hour. A modern refrigerator typically uses 1 to 2 kilowatt-hours over a full day.
| Steady load | Example | 1,070 Wh unit | 3,840 Wh unit | 18 kWh home battery |
|---|---|---|---|---|
| 100 watts | Lights, router, phone chargers | About 9 hours | About 33 hours | About 6 days |
| 300 watts | The above plus a TV and a fan | About 3 hours | About 11 hours | About 2 days |
| 800 watts | A furnace blower running | About 1 hour | About 4 hours | About 19 hours |
| 1,500 watts | A space heater or microwave | About 35 minutes | About 2 hours | About 10 hours |
| 3,800 watts | A small central air conditioner | Cannot run it | About 50 minutes | About 4 hours |
Two lessons stand out.
Batteries love small loads. Lights, internet, phone charging, a CPAP machine and a refrigerator are easy. A mid-size power station covers them for a day or more.
Batteries hate heat-making loads. Electric heaters, ovens, dryers and air conditioners drain a battery fast. The US Energy Information Administration puts the average American home at about 30 kilowatt-hours a day. No portable power station holds that much.
Key insight: a battery system does not replace your normal electricity use. It replaces the essentials. Decide what “essential” means in your home before you choose a size.
Our Emergency Power Planner and Generator Size Calculator help you list and add up your loads.
How Home Electric Generators Recharge
A fuel generator is refilled from a can. A battery is refilled with electricity, and there are four ways to supply it.
| Source | Speed | Works in an outage? | Notes |
|---|---|---|---|
| Wall outlet | Fast. About 2 to 3 hours for a 3,600 Wh unit | No | The EcoFlow DELTA Pro lists 2.7 hours from a standard outlet |
| 240-volt outlet | Faster | No | The DELTA Pro lists 1.8 hours at 3,000 watts |
| Solar panels | Slow, and depends on the sun | Yes | The DELTA Pro lists 2.8 hours with four 400-watt panels in strong sun |
| Car outlet | Very slow | Yes | A top-up, not a refill |
| A fuel generator | Fast | Yes | Run the generator for a few hours to refill the battery |
Solar in the real world
Solar panels are what turn a battery from a one-day solution into a long one. Be realistic about them. A panel’s rating is its output in strong, direct sun. On a typical day you get the equivalent of only four or five hours of that. A 400-watt panel therefore produces something like 1.6 to 2 kilowatt-hours on a good day, and far less under cloud or in winter.
That is enough to keep a refrigerator, lights and electronics going day after day. It is not enough to run air conditioning.
A generator and a battery together
Many owners pair the two. The fuel generator runs for two or three hours to recharge the battery and handle heavy loads. The battery then carries the house quietly through the night. You burn far less fuel, and the neighbors sleep.
Electric or Fuel Generator: An Honest Comparison
| Point | Battery power station | Fuel generator |
|---|---|---|
| Use indoors | Yes. No exhaust | Never |
| Noise | Nearly silent | 50 to 75 dBA or more |
| Fuel | None to buy or store | Gasoline, propane or natural gas |
| Run time | Limited by capacity | As long as fuel lasts |
| Recharge or refuel | Hours at an outlet, or solar | Minutes with a fuel can |
| Upkeep | Almost none | Oil, filters, spark plugs, fuel care |
| Power for the price | Lower | Higher |
| Starts big motors | Larger units only | Yes, if sized for it |
| Long outages | Needs solar or a generator | Needs a fuel supply |
Choose a battery if
- You live in an apartment or condo where a fuel generator cannot be run.
- Your outages are short, a few hours to a day.
- Your needs are modest: refrigerator, lights, internet, phones, medical devices.
- You want something anyone in the house can use without pulling a cord or handling fuel.
- You have, or plan to have, solar panels.
Choose a fuel generator if
- Your outages last days.
- You need to run a well pump, central air or electric heat.
- You have a safe outdoor spot at least 20 feet from the house.
- You want the most power for your money.
Connecting a Power Station to Your Home
The simplest way to use a power station is to plug appliances straight into it with extension cords. That works for a refrigerator, lamps and electronics.
It does not work for anything hard-wired, such as a furnace, a well pump or ceiling lights. For those, the power station has to feed your electrical panel.
Larger units are built for this. The Anker SOLIX F3800’s listing describes 120/240-volt output with NEMA 14-50 and L14-30 ports, which are the same outlets found on large fuel generators. The Jackery HomePower 3600 Plus’s listing mentions use with a manual transfer switch.
Panel connections need an electrician
Never connect a power station to your home by plugging it into a wall outlet. That can send power back into the utility lines and injure a line worker, and it can damage the unit when power returns. A connection to house wiring needs a transfer switch or an interlock, with an inlet box, fitted by a licensed electrician and with a permit where required. Check that the power station’s maker approves it for this use.
Our guide on how to connect a generator to your house explains transfer switches and interlocks. The same rules apply to a battery.
Installed Home Batteries
Above the portable class are batteries that are fixed in place and wired in by an installer. They switch on automatically, and they are usually part of a solar system.
Generac’s PWRcell 2 is one example with published figures. Its specification guide lists four cabinet sizes, from 9 kWh with 5.2 kW of continuous power up to 18 kWh with 10.5 kW. Two cabinets can be combined for up to 36 kWh.
Installed batteries cost much more than portable ones and need permits and professional design. In return they work without anyone touching them, they can power hard-wired circuits, and with solar they reduce your electricity bills every day, not only in outages. Incentives for home batteries change often, so check the current federal, state and utility rules before you budget.
Safety With Battery Systems
A battery system removes the biggest danger of a fuel generator, which is carbon monoxide. It has its own rules.
- Follow the temperature limits. Makers publish ranges for charging and use. Do not charge a frozen battery.
- Keep it dry and ventilated. Do not cover it or run it in a closed cupboard.
- Use the cables supplied or approved by the maker.
- Do not use a unit that is swollen, cracked or has been in a flood. Contact the maker.
- Keep it charged in storage. Most makers advise topping up every few months.
- Respect the output limit. Overloading trips the unit’s protection.
If you also own a fuel generator, every fuel generator rule still applies to it. Run it outdoors only, at least 20 feet from the house.
Five Home Electric Generators Worth a Look
We have not tested these. Details come from the makers’ Amazon listings. Makers’ performance claims are quoted as claims.
Small and simple
Jackery Explorer 1000 v2 Portable Power Station
A compact power station you can carry in one hand. The listing gives 1,070 watt-hours of storage, 1,500 watts of AC output and a weight of 23.8 pounds.
- Capacity1,070 Wh
- AC output1,500 W, 3,000 W surge
- BatteryLithium iron phosphate
- Weight23.8 lb
- Ports3 AC, 2 USB-C, 1 USB-A, DC car port
- ChargingWall, car or solar
- Why it works: it is light, quiet and enough for a refrigerator, lights and devices for most of a day.
- Who it is best for: apartments, short outages and anyone who wants backup without an engine.
- What it solves: spoiled food and dead phones in an outage of a few hours.
- Keep in mind: at a steady 300 watts it lasts about three hours. It will not run a furnace blower for long or any 240-volt appliance. Solar panels are sold separately.
As an Amazon Associate we earn from qualifying purchases. Details come from the Amazon listing, checked October 2026.
Home essentials
Jackery HomePower 3600 Plus Power Station
A wheeled power station for home backup. The listing gives 3,584 watt-hours, 3,600 watts of output and expansion up to 21 kWh.
- Capacity3,584 Wh
- AC output3,600 W, or 7,200 W with two in parallel
- 240 voltsWith two units in parallel
- ExpandableUp to 21 kWh
- Recharge2 hours with AC and DC together, per the listing
- Cycle life on listing6,000 cycles
- Why it works: 3,600 watts runs a refrigerator, a furnace blower, lights and a microwave together.
- Who it is best for: homes that want a day or more of essentials, with room to add batteries.
- What it solves: a mid-length outage, without fuel or noise.
- Keep in mind: one unit is 120 volts only. A 240-volt appliance, such as a well pump, needs two units. Connection to a panel needs a transfer switch and an electrician.
As an Amazon Associate we earn from qualifying purchases. Details come from the Amazon listing, checked October 2026.
Fast charging
EcoFlow DELTA Pro Portable Power Station, 3,600 Wh
A large power station with several ways to charge. The listing gives 3,600 watt-hours, 3,600 watts of output and a full recharge in 1.8 hours from a 240-volt outlet.
- Capacity3,600 Wh
- AC output3,600 W, or 7,200 W with two units
- BatteryLithium iron phosphate
- Recharge1.8 h at 240 V, 2.7 h from a wall outlet
- Solar2.8 h with four 400 W panels, per the listing
- ControlApp, by Wi-Fi or Bluetooth
- Why it works: fast charging means a short burst of grid power, or a few hours of generator time, refills it.
- Who it is best for: owners who will pair it with solar panels or a small fuel generator.
- What it solves: the waiting. Many batteries take most of a day to refill.
- Keep in mind: the charge times are the maker’s figures under ideal conditions. The solar time assumes strong sun on 1,600 watts of panels.
As an Amazon Associate we earn from qualifying purchases. Details come from the Amazon listing, checked October 2026.
Real 240-volt power
Anker SOLIX F3800 Portable Power Station, 3,840 Wh
A power station with 120/240-volt output and the same large outlets as a fuel generator. The listing gives 6,000 watts of AC output and expansion to 26.9 kWh.
- Capacity3,840 Wh
- AC output6,000 W at 120/240 V
- OutletsNEMA 14-50 and L14-30
- ExpandableUp to 26.9 kWh with six battery packs
- BatteryLithium iron phosphate
- Warranty on listing5 years
- Why it works: 240-volt output from a single unit can run a well pump or feed a transfer switch.
- Who it is best for: homes that want a battery to do the job of a mid-size portable generator.
- What it solves: hard-wired and 240-volt loads, which smaller power stations cannot touch.
- Keep in mind: at 6,000 watts the battery would be empty in well under an hour. High output is for short bursts, such as a pump starting. A panel connection needs an electrician.
As an Amazon Associate we earn from qualifying purchases. Details come from the Amazon listing, checked October 2026.
Largest single unit
EcoFlow DELTA Pro 3 Portable Power Station, 4,096 Wh
The largest of the five. The listing gives 4,096 watt-hours, 4,000 watts at 120 or 240 volts and expansion up to 48 kWh.
- Capacity4,096 Wh
- AC output4,000 W at 120/240 V
- ExpandableUp to 48 kWh
- NoiseAs low as 30 dB, per the listing
- Switchover10 milliseconds, per the listing
- BatteryLithium iron phosphate
- Why it works: a fast switchover lets it act as an uninterruptible supply for computers and network gear.
- Who it is best for: home offices, and homes planning a larger battery system over time.
- What it solves: the flicker and reboot when power fails, as well as the outage itself.
- Keep in mind: the listing’s claim about running a central air conditioner depends on the unit’s size and starting surge. Have an electrician check before you rely on it.
As an Amazon Associate we earn from qualifying purchases. Details come from the Amazon listing, checked October 2026.
A tool worth owning first
Measure before you buy
P3 P4400 Kill A Watt Electricity Usage Monitor
A plug-in meter that shows how many watts an appliance draws and how many kilowatt-hours it uses over time. For sizing a battery, that second figure is the one you need.
- DisplaysVolts, amps, watts, kilowatt-hours
- Accuracy on listingWithin 0.2 to 2.0%
- For115-volt AC appliances
- Capacity15 amps
- DisplayLCD
- Warranty1 year limited
- Why it works: leave your refrigerator plugged into it for 24 hours and you will know exactly how many watt-hours a day it needs.
- Who it is best for: anyone deciding how big a battery to buy.
- What it solves: buying too small, or paying for capacity you will never use.
- Keep in mind: it works on 120-volt plug-in appliances only, not hard-wired or 240-volt ones.
As an Amazon Associate we earn from qualifying purchases. Details come from the Amazon listing, checked October 2026.
Common Mistakes With Home Electric Generators (and the Fix)
Pro Tips for Battery Backup
- Measure your refrigerator for a day. It is usually the load that matters most.
- Keep it plugged in and full during storm season.
- Use DC ports for DC devices. Charging phones from USB ports wastes less than using the AC outlets.
- Turn the AC output off when nothing is plugged in. The inverter uses power even with no load.
- Start small and expand. Several models accept extra batteries later.
- Think about a hybrid plan. A small fuel generator for a few hours a day, and a battery for the rest, uses very little fuel.
- Check the warranty and cycle life. They tell you how long the maker expects the battery to last.
Real-Life Scenarios: Which Backup Fits?
These are typical situations. They are examples to help you choose, not reports from real customers.
🏢 The apartment
No yard, no balcony fit for an engine, and outages of a few hours.
A 1,000 watt-hour power station keeps the fridge, lights, router and phones going. Nothing else is practical.
Fit: small power station
🏡 The suburban house
Gas heat, city water and outages of up to a day or two.
A 3,600 to 4,000 watt-hour unit covers the refrigerator, furnace blower, lights and internet. Add a solar panel or two to stretch it.
Fit: mid-size power station
🌲 The rural home on a well
A 240-volt well pump, and outages that can last a week.
A battery alone will not do. A fuel generator is the core, and a battery can carry the quiet hours between runs.
Fit: fuel generator, plus a battery
Home Electric Generators: FAQ
What is a home electric generator?
It is a battery system that stores electricity and supplies it during an outage. Portable versions are called power stations or solar generators. Installed versions are wired into the home by an electrician. Unlike a fuel generator, it has no engine and produces no exhaust.
Can an electric generator power a whole house?
Not a portable one, for long. The average American home uses about 30 kWh a day, and most portable power stations hold 1 to 4 kWh. They are sized for essentials. Larger installed batteries, especially with solar panels, can cover much more.
How long will a battery generator run a refrigerator?
A modern refrigerator typically uses 1 to 2 kWh a day. A 1,070 watt-hour power station runs one for roughly half a day to a day. A 3,600 to 4,000 watt-hour unit runs one for about a day and a half to three days if nothing else is connected.
Are electric generators safe to use indoors?
Yes. A battery power station produces no carbon monoxide, so it can be used inside the home. Follow the maker's temperature limits, keep it dry and ventilated, and do not use a damaged unit.
Is a battery generator better than a gas generator?
It is better for short outages, small loads, indoor use and quiet. A gas generator is better for long outages, large loads and power for the price. Many homes are best served by a small gas generator and a battery used together.
How do you recharge an electric generator in a power outage?
With solar panels, from a car outlet, or from a fuel generator. Solar is the usual choice, but it is slow and depends on the weather. A fuel generator can refill a large battery in a few hours.
Your Home Electric Generator Checklist
- List the essentials you want to run.
- Measure or look up the watts of each one.
- Work out the watt-hours you need for a day.
- Add about 15% for losses.
- Check the output in watts against your largest appliance.
- Check whether you need 240 volts.
- Decide how you will recharge in a long outage.
- Plan a transfer switch with an electrician if you want hard-wired circuits.
- Keep the unit charged through storm season.
- Top it up every few months in storage.
The bottom line
A home electric generator is the easiest backup power to own: silent, clean and safe indoors. Size it for your essentials, know how you will refill it, and for outages that last days, pair it with solar panels or a fuel generator.
As an Amazon Associate we earn from qualifying purchases.
Sources: Amazon listings for the Jackery Explorer 1000 v2, Jackery HomePower 3600 Plus, EcoFlow DELTA Pro, Anker SOLIX F3800, EcoFlow DELTA Pro 3 and P3 Kill A Watt P4400; Generac’s PWRcell 2 specification guide; US Energy Information Administration for average household electricity use. All checked October 2026.
