3 Best Indoor Generators

Indoor generators have a lot of benefits over conventional gas-powered generators. They can also be called a Portable Battery Power Station, as the generator stores electricity in one or more batteries and then converts the direct current battery power into alternating current (AC) power using an inverter.


This enables us to make use of the battery power plant indoors. There is minimal sound and no emission of harmful gasses from the engine — things that occur in conventional generators.


Today, we’ll discuss the best indoor generators, the pros and cons, and wattage demands in detail to help you find the best fit.


Best Indoor Generators – Our Top Picks

Jackery Explorer 500 Portable Power Station

The Jackery Explorer 500 is a compact, long-lasting generator suitable for both outdoor and indoor residential applications. It’s small enough to fit inside motor homes and caravans, but powerful enough to power a small mixer, pellet smoker, projector, and the motor-home lighting and fans.

This portable generator features a rechargeable battery that can be charged via a solar panel or a power outlet. It also has three USB ports, so you can charge your mobile phone or other devices that have a USB port.

Features and specifications:

  • Dimensions: 11.84 x 7.59 x 9.20 inches
  • Weight: 13.2 pounds
  • Voltage: 110 volts
  • Wattage: 518 watts
  • DC outputs: 1 (12V, 10A), 2 (12V, 7A, 6.5 x 4.4 x 1.4 mm)
  • Battery capacity: 518Wh (24Ah, 21.6V)
  • USB outputs (3): 5V, 2.4A (each)
  • Power source: AC, Carport, solar panel

This small generator for homes or camping cannot support appliances that require more than 500 watts, including hair dryers, coffee makers, microwaves, and heaters. However, it’s an excellent emergency power supply for medical devices, such as CPAP machines, and has a long-life battery that can recharge a mobile phone up to 53 times.


The Jackery Explorer 500 has an in-built pure sine wave Inverter that protects devices, such as laptops from over-voltage by distributing power evenly. This generator is not supplied with a rechargeable solar panel or cable adaptor, although it’s recommended as an environmentally friendly substitute for recharging.



  • Lightweight and easily portable at only 13 lbs.
  • The LCD screen makes operation easy
  • Environmentally friendly device
  • Supplied with a two-year manufacturer’s warranty


  • The power output is not as strong as other portable generators
  • It’s time consuming using the solar panel to charge
  • The battery tends to discharge faster in cooler weather

FlashFish 300 Watt Portable Power Station

This Flashfish 300W delivers a high amount of energy that is similar to conventional petrol generators, but without excessive noise, exhaust gas, maintenance, and weight. FF G300 has more outputs (3x USB ports, 2x DC outputs, and 2x 110 AC outputs) and higher power.


The unit has an output of 300W, which you can use to power your drones, fans, tablets, televisions, laptops, car appliances, and even drills. It can satisfy all of your electrical requirements when traveling, camping, and at home.


Features and specifications:

  • Dimensions: 9.8 x 3.35 x 5.12 inch
  • Weight: 5.6lb
  • Voltage: 110 volts
  • Wattage: 300W rated power, 350W surge power
  • DC output: (2)12V
  • Battery capacity: 6000mAh (222Wh)
  • USB outputs: (2 QC3.0), (1) 5V/2.4A

FlashFish 300W  also has an LCD screen that shows the amount of power remaining, AC output, DC output, discharge status, and charge quantity. You can visually check the status of the battery and track when the battery needs to be recharged. And the battery can be recharged in three modes: power (wall sockets), solar panel, and car lighter adapter.


FF G300 is also supplied with a sturdy handle, and is lighter and weighs only 5.6lbs. It’s very easy to store in the car if you need to move around with it or place it on any table surface in the house if you‘re staying at home.



  • An in-built cooling fan for heat dissipation during operation at higher power
  • Seven outlets
  • Three charging modes
  • It comes with a 12-month warranty


  • The 50W solar panel is sold separately
  • Lower peak power

Prymax Portable Power Station

The PryMAX 3000W provides security for your home or condominium or when traveling. This indoor portable generator is lightweight and designed with an easy to carry handle so you can take with you wherever you need it.


The PryMAX 300W updated lithium battery cells are powerful enough to recharge a mobile phone 40 times, a laptop seven to eight times, and power a 32 -inch television or mini-fridge for up to five hours. With its built-in intelligent and quiet fan for cooling, it’s a safe generator for living in an apartment or condominium. PryMAX also uses two pure sine wave sockets to safely charge small electronics and sensitive appliances.


Features and specifications:

  • Dimensions: 11.84 x 7.59 x 9.20 inches
  • Weight: 6.5 pounds
  • Voltage: 110V
  • Wattage: 300W rated power, 600W surge power
  • DC output: 12V/8A, 24V/3A
  • Battery capacity: 298Wh
  • USB outputs (3): 5V, 2.4A (each)
  • Power source: solar-powered, battery-powered

Although the PryMAX 300W generator can drive CPAP machines, for optimum performance, you’ll need to buy a separate DC converter to run this type of equipment. You’ll also need to purchase a solar panel separately to charge with solar energy, but you can also charge via a carport or by plugging into a power outlet at home. The package includes an indoor portable generator, AC adaptor, user manual, and PryMAX service card.


Safety is a major concern for PryMAX, and they designed the 300W generator with protection against over-power, over-charge, overvoltage, over-current, temperature, short circuit, electromagnetic field, and restoration.



  • In-built overvoltage and short circuit protection
  • Flashlight with SOS programming for use in emergencies and at night
  • LED screen makes operation easy
  • Comes with a two-year manufacturer’s warranty


  • A tendency to overheat during heavy use
  • Does not have quick charge connectors
  • Does not work for larger devices

Advantages of Indoor Generators

A portable indoor generator is ideal emergency support in case you live in an apartment or have a small property, where an outdoor generator is out of the question.


Environmentally Friendly

The best indoor generator for home doesn’t require gas to operate and therefore has no significant carbon footprint. Lots of indoor generators are equipped to be charged by solar energy, which means that you don’t need to depend on a power outlet or car battery.


Compact Size

A small generator for living in a flat can easily be stored in a cupboard or showcase until it is needed. They don’t disturb already limited spaces. Thanks to their compact size, these generators can also be easily lifted and moved and taken on trips.


Indoor or Outdoor Living

Unlike conventional generators for outdoor use, which cannot be brought inside a building and often have to maintain a certain distance from a building, portable generators are designed for indoor use, but can also be used outdoors if required.


While some are more robustly built than others, indoor generators for homes can be used to power small devices or equipment when camping or traveling.

What to Look for When Buying an Indoor Generator

You buy an indoor generator and wonder what you should consider?  Whether you are interested in an emergency power source for your home or a lasting power station for your motorhome or van, there are some important things to consider when choosing an indoor generator.


Battery Capacity of the Indoor Generator

Above all, the battery capacity of an indoor generator will dictate its true potential. The more watt-hours (wH) a generator can hold, the more hours of power it can provide to your appliances and equipment.  Of course, battery capacity is directly related to the price and weight of an indoor generator, both of which will increase with larger units.  To calculate how much battery capacity you’ll need with your indoor generator, you should first consider everything you’re trying to run with it and from there, calculate your average load in watts.


Output Potential of an Indoor Generator

When analyzing the performance of an internal generator, two things must be taken into account: capacity and socket availability. Depending on what you want to run, you may need several AC (wall) plugs or USB connectors. If you want to power high-performance equipment such as power tools or an air conditioner, you’ll also need to ensure that your generator is designed to run continuously at high watts.


This means that you must take into account the size of the inverter in your indoor generator. These are sufficient in all sizes, but the larger the inverter, the larger devices you can operate. It’s best to go with at least a 500 Watt inverter to ensure you can operate most standard household appliances.


Charging Capabilities for Indoor Generator

Lastly, it’s important to understand the complete charging capabilities of your indoor generator. Can the unit be easily plugged into an electric outlet? What about a car? What about solar panels? Also, how long does it take to fully charge the device?  If you need a continuous indoor power supply in the event of a power failure, you should ensure that your generator can be recharged quickly and efficiently.


Also Read: Best Power Generators [2022]

Wattage Demands of indoor generator

ApplianceStarting WattsRunning Watts
Furnace (1/4 HP)1000600
Sump Pump (1/3 HP)1300800
Washing Machine22501150
Window AC 13K BTU28001800
Well Pump21001000

Frequently Asked Questions About indoor generator

Are Indoor Generators Safe to Use?

Unlike a large outdoor generator, an indoor portable generator uses batteries to keep small devices and electronics running during a blackout or camping trip. They don’t release dangerous gases and can be used inside. Although these small generators are often equipped with cooling fans, their monitoring is crucial to ensure that they do not overheat indoors.


Which is the Best Indoor Generator?

Different generators can meet different needs. To ensure the security of yourself and your family, you should look for an indoor generator for homes that has over-voltage protection and can cool itself inside. If you want to charge more than one device at a time, look for different types of sockets and USB connector.


What Devices Can an Indoor Portable Generator Charge?

All generators on this list can run devices that operate at 300W – 500W and provides some overcharge protection. With an indoor generator for homes, you can safely charge mobile phones, laptops, smaller televisions and lamps, mini-fridges, and CPAP devices.


How Do You Charge an Indoor Portable Generator?

You can charge these portable power devices from a wall socket or carport. You can also charge many of these units by buying and using a small, portable solar panel.


Can Portable Generators Be Used While Charging?

Be sure to look through the specific FAQs of the manufacturer to see if your generator can charge other appliances during the charging process. Normally, the alternating current connectors cannot be used while the generator is being charged, but the USB connectors remain functional.


Which Batteries are Used to Power an Indoor Generator for Homes?

Most devices available in the market today utilize lithium-ion batteries.


So, Which is The Best indoor generator?

Each of these generators are suitable for indoor use as they produce no fumes and make little noise. ..but, which is best for you?


With 500 maximum Watts, The Jackery 500 provides the most power and is able to keep your devices charged for longer than the others.


The Flashfish 300  is the most affordable option.


The Flashfish 300  is also the most portable option, weighing less than 6 lbs.

indoor generator Conclusions

Owning a small generator for the home and personal use does not replace the amount of electricity that an outdoor generator or home standby generator’s power can offer. However, they can help reduce stress by keeping small devices and electronics working during blackouts. Some models even have flashlights with SOS programming for emergency use.


We believe the Jackery 500  to be the best overall indoor generator due to its power output and the fact that it can keep more devices running for longer.

The most affordable option is the Flashfish 300W . If you’re looking for other types of generators with more power, you can view the best power generators.

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