Electric Blanket Wattage: What You Need to Know

Quick answer

• Most electric blankets use between 100 and 200 watts.
• Higher wattage means faster heating, but also more power draw.
• Older blankets or those with dual controls might use more.
• Always check the manufacturer’s tag for specific wattage.
• Running an electric blanket on a generator? Factor in its wattage.
• Don’t overload circuits, especially in older RVs or cabins.

What to check first (do this before you drive out)

Before you plug in that electric blanket, a little prep work goes a long way. It’s not just about staying warm; it’s about staying safe and not tripping breakers in the middle of nowhere.

• Power Source Capacity: Know what you’re plugging into. Is it a modern house outlet, an older cabin’s wiring, an RV power hookup, or a portable generator? Each has limits. An electric blanket pulls a decent chunk of power. You don’t want to find out your generator can’t handle it when the temperature drops. For generators, check their continuous wattage rating. For RVs or cabins, know the amperage of the circuit.

• Blanket Specifications: Dig out that tag. It’s usually sewn into a seam. It’ll tell you the voltage and wattage. Wattage is the key here – it’s the actual power consumption. If you can’t find it, assume it’s in the average range (100-200W), but be conservative.

• Extension Cord Rating: If you need an extension cord, make sure it’s rated for the job. A cheap, thin cord can overheat and become a fire hazard, especially if it’s powering a higher-wattage blanket. Look for cords designed for outdoor use or heavy-duty applications.

• Safety Features: Modern electric blankets have auto-shutoff features. These are lifesavers. Older ones might not. Understand if your blanket has these. Also, check for any fraying wires or damage. A damaged blanket is a no-go, period.

Step-by-step (field workflow)

Here’s how to get your electric blanket running smoothly and safely in your campsite or cabin.

1. Inspect the Blanket: Lay it out. Check for any visible damage to the fabric or the power cord. Look for frayed wires, burns, or worn spots.

• Good: The blanket looks clean, the cord is intact, and all controls seem secure.
• Mistake: Using a blanket with even minor cord damage. This is a fire risk and can short out. Always err on the side of caution and replace damaged blankets.

2. Locate the Power Outlet: Find a suitable outlet. For a cabin, this is easy. For an RV, use the shore power or your generator. If you’re using a generator, make sure it’s running and stable.

• Good: A grounded outlet that’s easily accessible and not overloaded with other devices.
• Mistake: Plugging into an outlet that’s already powering a space heater, microwave, or other high-draw appliance. This can trip breakers or damage wiring.

3. Connect Extension Cord (if needed): If you need an extension cord, plug it into the power source first. Ensure it’s the correct gauge and rating for the blanket’s wattage and the distance.

• Good: A heavy-duty, outdoor-rated extension cord securely plugged in.
• Mistake: Using a light-duty indoor cord or an old, damaged extension cord. These can overheat and cause fires.

4. Plug in the Blanket Cord: Connect the blanket’s power cord to the extension cord or directly into the outlet. Make sure the connection is snug.

• Good: A firm connection with no loose wires or sparking.
• Mistake: Forcing a connection or leaving it loose. This can lead to intermittent power or a poor connection that generates heat.

5. Set the Temperature Control: Turn the control dial or press the buttons to your desired warmth setting. Start on a lower setting to gauge the heat.

• Good: The control lights up, and you feel a gentle warmth starting to build.
• Mistake: Immediately cranking it to high. You might overheat yourself or the blanket. It’s better to gradually increase the heat.

6. Allow Time to Heat Up: Electric blankets don’t instantly blast heat. Give it 10-20 minutes to reach its optimal temperature.

• Good: You can feel the warmth spreading evenly across the blanket.
• Mistake: Expecting instant heat and thinking it’s broken if it’s not scorching hot right away. Patience is key.

7. Adjust as Needed: Once it’s heated up, adjust the setting to maintain comfort. You likely won’t need the highest setting for long.

• Good: You’re comfortably warm without feeling too hot or sweaty.
• Mistake: Leaving it on high all night, potentially leading to overheating or excessive power draw.

8. Monitor During Use: Especially if you’re using an older blanket or in a less-than-ideal power situation, keep an eye on it. Feel the cord and controls periodically to ensure they aren’t getting excessively hot.

• Good: Everything feels normal – no unusual heat or smells.
• Mistake: Falling asleep immediately without checking if the blanket is functioning as expected.

9. Turn Off When Not in Use: When you get up, go to the bathroom, or leave your sleeping area, turn the blanket off. This saves power and is a crucial safety step.

• Good: The control light goes off, and you feel the heat dissipate.
• Mistake: Forgetting to turn it off, especially if it doesn’t have an auto-shutoff.

10. Unplug When Packing Up: Before you pack the blanket away, unplug it from the power source.

• Good: The cord is safely disconnected from the outlet or extension.
• Mistake: Packing the blanket while it’s still plugged in, creating a potential hazard or short circuit.

Common mistakes (and what happens if you ignore them)

Mistake	What it causes	Fix
Using a damaged blanket/cord	Fire hazard, electric shock, short circuit, damage to power source	Inspect regularly; discard any damaged blankets immediately.
Overloading the circuit/generator	Tripped breakers, blown fuses, generator shutdown, potential wiring damage	Check wattage of blanket vs. capacity of outlet/generator/circuit. Use one high-draw item at a time.
Using the wrong extension cord	Overheating cord, fire risk, reduced power to the blanket	Use a heavy-duty, outdoor-rated extension cord suitable for the blanket’s wattage.
Forgetting to turn it off	Wasted electricity, potential overheating, fire hazard if no auto-shutoff	Develop a habit of turning it off when you get up or leave.
Plugging into a wet/damp outlet	Electric shock hazard, short circuit	Ensure the outlet and surrounding area are completely dry before plugging anything in.
Using blanket while sleeping if no auto-shutoff	Overheating, burns, fire hazard	Only use blankets with auto-shutoff for sleeping, or be very vigilant.
Storing the blanket while still plugged in	Cord damage, potential short circuit when next used	Always unplug completely before folding and storing.
Washing improperly	Damage to heating elements, fire hazard, reduced lifespan	Follow manufacturer instructions precisely; never dry clean or machine dry unless specified.
Using on a soft/uneven surface	Uneven heating, potential for wires to bend or break over time	Place on a flat, stable surface where it can lie evenly.
Ignoring manufacturer instructions	Reduced lifespan, potential safety issues, voided warranty	Read and follow all instructions provided with the blanket.

Decision rules (simple if/then)

• If your generator is rated for less than 200 watts continuous, then don’t plan on running a standard electric blanket, because most use at least that much power.
• If you’re in an older cabin with questionable wiring, then err on the side of caution and use a lower-wattage blanket or skip it altogether, because old wiring can’t handle modern power demands.
• If the blanket’s power cord shows any signs of fraying or damage, then do not use it, because it’s a significant fire and shock hazard.
• If you need an extension cord, then make sure it’s rated for at least 10-15 amps, because electric blankets can draw a lot of current.
• If your blanket doesn’t have an auto-shutoff feature, then set a timer or be extra vigilant about turning it off manually, because leaving it on unattended is a major fire risk.
• If you’re using a dual-control blanket, then check the total wattage, because sometimes running both sides on high can exceed the capacity of some power sources.
• If you feel excessive heat coming from the plug or controls, then unplug it immediately, because something is likely wrong.
• If you’re unsure about the power capacity of your campsite hookup or RV, then check the park or RV manual first, because you don’t want to be the reason the whole loop loses power.
• If you plan on using the blanket on a very cold night, then pre-heat it for 15-20 minutes before you get into bed, because it takes time to warm up effectively.
• If you’re using a battery-powered blanket, then know its battery life and charging requirements, because they often have lower wattage and shorter run times than plug-in models.

FAQ

How many watts does a typical electric blanket use?

Most electric blankets fall between 100 and 200 watts. Some older or larger models might go slightly higher, but this is a good general range.

Can I run an electric blanket off a portable generator?

Yes, but you need to ensure your generator has enough continuous wattage output. A 200-watt blanket needs a generator that can comfortably supply at least that much, ideally more, to handle startup surges.

Is it safe to sleep with an electric blanket on?

Modern electric blankets with auto-shutoff features are generally considered safe for sleeping. However, always follow the manufacturer’s instructions and inspect the blanket for damage.

What happens if I plug an electric blanket into a low-wattage outlet?

You’ll likely trip the circuit breaker or blow a fuse. In older systems, it could potentially damage the wiring or the outlet itself.

Do electric blankets use a lot of electricity?

Compared to a small LED light, yes. But compared to a space heater, they use significantly less. They’re a relatively energy-efficient way to stay warm in bed.

Can I use an extension cord with my electric blanket?

Yes, but you must use a heavy-duty extension cord rated for the blanket’s wattage. A thin, cheap cord can overheat and become a fire hazard.

What’s the difference between a 100-watt and a 150-watt electric blanket?

The 150-watt blanket will heat up faster and potentially get hotter than the 100-watt one. It also draws more power.

Should I wash my electric blanket?

Many are machine washable, but always check the care tag. Never dry clean unless specifically allowed, and avoid high heat in the dryer. Improper washing can damage heating elements.

What this page does NOT cover (and where to go next)

• Specific campsite electrical hookup details (check campground guides).
• Detailed generator maintenance and repair (consult generator manuals).
• RV electrical system troubleshooting (refer to RV service manuals).
• Local fire regulations for campfires (check with park rangers or fire departments).
• Best practices for sleeping bag insulation (explore sleeping bag reviews and guides).