How Many Watts Does A Space Heater Use For Warmth?

How Many Watts Does A Space Heater Use For Warmth?

During the winter months, with the cold winds howling, many people curl up next to a space heater because it can serve as a great source of indoor and outdoor heat, ensuring a cozy and warm environment. But before you decide to plug it in, you need to know how many watts does a space heater use. That’s because the wattage of a space heater not only affects its heating capability but also determines its energy consumption and efficiency.

This blog will explore the wattage a space heater uses. Additionally, we'll provide innovative solutions for powering your space heater during off-grid camping adventures and offer advice on selecting the right power equipment, ensuring you stay warm without compromising on safety or efficiency.

What Does Wattage Mean for a Space Heater?

Wattage indicates how much power a space heater requires per hour and determines how quickly it can produce heat. For a space heater, a higher wattage means that it can produce more heat faster to warm its surroundings. However, it's worth noting that higher wattage means higher energy consumption and electricity bills. For example, a 1,500-watt space heater will cost you $1.20 to run for five hours a day, or nearly $38 a month.

How to Know the Exact Wattage of Your Space Heater?

The best way to determine how many watts is a space heater is to check the manual or the label on the bottom or back of the product. If you choose to shop online, the exact wattage will usually be in the details or description section.

Most space heaters on the market are 1500 watts. There are also space heaters that offer two temperature levels with wattage of 750 and 1500 watts. Higher wattage means more heat output. 750 watts space heater is better suited for small rooms, such as a den or bedroom for personal warmth, while 1500 watts is suitable for heating medium-sized rooms, such as a living room. It's crucial to know the exact wattage so you can avoid possible circuit hazards and determine the right portable power options.

Different Ways to Power the Space Heater When Camping Off-Grid

If you are planning an off-grid camping trip with a space heater, but struggling with what to use to power it, consider these three widely used portable power options:

Portable Battery Packs

Portable power stations are one of the most popular and reliable power supplies for outdoor camping. Let’s take the versatile Anker SOLIX F3800 Portable Power Station as an example, which is perfect for off-grid outdoor living. With an output of 6,000 watts and a capacity of 3.84 kWh, this portable power supply easily meets the energy needs of your space heater. It also comes with multiple outlets, and a 120V/240V dual voltage design to seamlessly power space heaters along with other essential equipment during your adventures. 

Solar Power Systems

Thanks to its ability to harvest renewable energy, the solar generators are ideal for extended off-grid camping trips to continuously power a space heater. The Anker SOLIX F3800 Solar Generator is a good example. It is equipped with a 400W solar panel, utilizing solar energy to charge portable power stations and other devices for extended periods of time. The substantial capacity of this power station ensures efficient conversion of solar energy, maintaining warmth at the campsite throughout the night.

Gas-Powered Generators

Gas generators offer a fuel-powered alternative to solar or batteries for winter camping. Gas-fired generators are cleaner, cheaper and more efficient than other fuels, such as oil and diesel, and do not produce irritating odors. It can provide reliable and consistent power for your space heaters as well as other electrical equipment. However, natural gas is still a non-renewable resource and has a limited lifespan compared to solar generators. When using a gas generator to run a space heater in an enclosed area, proper ventilation must be considered to ensure safety.

What to Consider When Choosing Power Equipment for a Space Heater?

These are a few key factors to consider when it comes to choosing the right power equipment for your space heater:

Power Output

For effective operation of a space heater, you need to make sure that the power output of the power equipment exceeds the wattage of the space heater. If a space heater has a wattage of 1500, then a power supply unit with a minimum output of 2000 watts is required.

Battery Capacity

Consider the battery capacity of the power equipment. This will determine how long they can power the space heater and how many extra batteries you will need. Note that the larger the capacity the longer it will take to charge the batteries before use.

Device Efficiency

Efficient power equipment reduces energy consumption, improves power stability and reliability, plus extends battery life.


All in all, knowing how many watts does a space heater use helps in selecting the right power source, especially when off-grid camping, with options like portable battery packs, solar power systems, and gas-powered generators. When choosing power equipment, consider the power output, battery capacity, and device efficiency to ensure your space heater operates optimally. This knowledge empowers you to make informed decisions for comfortable, sustainable warmth wherever you are.


Do space heaters use a lot of electricity?

This depends on the wattage of the space heater and how long it is used. If you have a 1500-watt space heater and use it for 5 hours a day, it will consume 52.5 kWh in a week.

How many hours can you run a space heater with a portable power station?

The number of hours a space heater with a portable power station can run relies on the battery capacity of the power station and the wattage of the space heater. The Anker SOLIX F3800 portable power station, for example, has a capacity of 3.84 kWh and can run a 1,500-watt space heater for two hours.

How to use space heaters safely?

For safe use of the space heater, do not leave it unattended, and make sure there are no flammable items within 3 feet. If there are children or pets in the house, make sure they can't access it. You should choose a space heater with an automatic shut-off feature so that it will turn off if it tips over or overheats.

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