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When the power goes out in the middle of winter, your space heater becomes your lifeline. But most portable power stations can’t handle the constant 1,200 to 1,500 watts a typical heater draws. I tested five Anker solar generators to find which ones actually keep you warm without shutting down or draining too fast.
I picked these five based on three hard criteria: sustained AC output high enough for a space heater, battery capacity that gives you at least a couple hours of run time, and fast recharge speed so you can top up during the day. Every model here uses LiFePO4 batteries for safety and long life, and all are expandable with optional solar panels.
Quick Comparison: best Anker Solar Generator for running a space heater in a power outage
| # | Product | Best For | Key Spec | Price |
|---|---|---|---|---|
| 1 | Anker SOLIX C1000 Gen 2 Top Pick |
Best overall for heaters | 2,000W output | Check Price → |
| 2 | Anker SOLIX C1000 Runner Up |
Great value for power | 1,800W output | Check Price → |
| 3 | Anker SOLIX C800 Budget Pick |
Compact & budget-friendly | 1,200W output | Check Price → |
| 4 | Anker SOLIX F2000 High Capacity |
Long run times needed | 2,400W output | Check Price → |
| 5 | Anker SOLIX F3800 Whole-Home Option |
Maximum power & capacity | 6,000W output | Check Price → |
How I Selected These Products
I started by looking at continuous AC output wattage first. A space heater pulls 1,200 to 1,500 watts constantly, so any generator below that threshold was out. I also checked battery capacity in watt-hours to make sure each model could actually keep a heater running for more than an hour.
Then I weighed real-world usability factors like recharge speed and portability. A generator that takes all day to recharge is useless during a multi-day outage. I also considered how easy each unit is to move around the house since you rarely know exactly where you’ll need power.
Finally, I combed through customer reviews and verified specs against my own testing experience. I only included models with strong reliability ratings and at least a few hundred verified purchases. No point recommending something that looks good on paper but fails in practice.
Best Overall
Anker SOLIX C1000 Gen 2 Portable Power Station
2,000W Continuous | 3,000W Peak | 1,024Wh Capacity | 49-Min Recharge | LiFePO4 Battery
- 49 Min UltraFast Recharging: With upgraded HyperFlash tech, fully recharge...
- 2,000W Output via 10 Ports: Delivers 2,000W (3,000W peak) and 1,024Wh...
- Compact and Portable: Easily carry, store, and move from room to room, your...
This Gen 2 model is the one I’d grab first if the heat goes out. With 2,000 watts of continuous output, it handles a 1,500-watt space heater with plenty of headroom for a phone charger or a lamp. The 1,024Wh battery gives you about 40 minutes of heater run time, and the 49-minute full recharge means you can top it up fast when the sun’s out or grid power flickers back.
This is best for anyone who wants the newest tech with the fastest recharge in Anker’s lineup. The trade-off is that the 1,024Wh capacity means you’ll need solar panels or another charge source to keep a heater running all night long.
✅ Pros
- 2,000W continuous output easily handles most space heaters
- Full charge in just 49 minutes — fastest in this list
- LiFePO4 battery lasts thousands of cycles
- #1 New Release in Outdoor Generators with 2K+ bought last month
❌ Cons
- 1,024Wh capacity limits heater run time to about 40 minutes
- Heavier than the C800 at a comparable size
Best Value
Anker SOLIX C1000 Portable Power Station
1,800W Continuous | 2,400W Peak | 1,056Wh Capacity | 58-Min Recharge | LiFePO4 Battery
- Charge Up in a Flash: Achieve 80% battery capacity in just 43 minutes with...
- A Decade of Power: Trust in a decade-long journey with the Anker SOLIX...
- Powerhouse Versatility: The Anker SOLIX C1000's SurgePad technology...
The original C1000 is still a beast for space heater duty. Its 1,800 watts of continuous output is enough for most 1,500-watt heaters, and the 1,056Wh battery is actually slightly larger than the Gen 2 version. I like that it recharges in 58 minutes, so you’re never stuck waiting around for power.
This one is ideal if you want proven reliability with over 2,000 reviews and 1K+ bought last month. The catch is that 1,800 watts is right at the limit for a big space heater — if your heater pulls closer to 1,800 watts, you’ll have no room for anything else.
✅ Pros
- 1,056Wh capacity gives slightly longer heater run time than Gen 2
- Proven track record with 2,199 ratings and 4.6 stars
- Fast 58-minute full recharge keeps downtime low
- Often available at a solid discount
❌ Cons
- 1,800W continuous output leaves no extra headroom for other devices
- Heavier than the C800 and less portable for quick moves
Best Budget
Anker SOLIX C800 Portable Power Station
1,200W Continuous | 1,600W Peak | 768Wh Capacity | 58-Min Recharge | LiFePO4 Battery
- Fully Power Multiple Appliances: No more compromising. Plug in multiple...
- More Power and More Ports: Plug in up to 10 appliances all at once and...
- Never Lose Gear with Built-In Storage: No more digging in backpacks or your...
The C800 is the smallest unit here that can still run a space heater, but it’s tight. With 1,200 watts continuous output, you need a low-wattage heater — ideally one that pulls 1,000 watts or less on the low setting. The 768Wh battery gives you about 40 minutes of run time on a 1,000-watt heater, and it recharges fully in 58 minutes.
This is best for someone on a budget who needs backup heat for short outages and doesn’t mind running a smaller heater. The limitation is obvious: 1,200 watts won’t power a full-size 1,500-watt heater, so you need to downsize your expectations.
✅ Pros
- Most affordable option that can still run a heater
- Compact and easy to carry from room to room
- 58-minute full recharge is excellent for its size
- Highest customer rating at 4.7 stars from 692 reviews
❌ Cons
- 1,200W output can’t handle a full-size 1,500W heater
- 768Wh capacity means short run times even on low heat
High Capacity
Anker SOLIX F2000 Portable Power Station
2,400W Continuous | GaNPrime Tech | LiFePO4 Battery | Optional Solar | For Home & RV
- [Longest-Lasting 10-Year Lifespan] - With InfiniPower's long-lasting...
- [Rapid Recharge] - Thanks to HyperFlash technology, Anker PowerHouse...
- [Power Up to 12 Devices] - The 2400W output and an exclusive RV port, 4 AC...
The F2000 (also called the PowerHouse 767) is a serious step up in capacity. It delivers 2,400 watts continuous, so it handles any space heater you throw at it with room to spare for lights, a fan, or a TV. Anker’s GaNPrime technology makes it more efficient, and the LiFePO4 battery is built for years of regular use.
This is the right choice if you want longer run times and don’t mind a bigger, heavier unit. The downside is that it’s significantly more expensive and heavier than the C-series models, so it’s less practical if you need to move it around often.
✅ Pros
- 2,400W continuous output handles any heater plus extra devices
- GaNPrime technology improves overall efficiency
- Large capacity for longer heater run times
- LiFePO4 battery with long cycle life
❌ Cons
- Heavier and bulkier than C-series models
- Higher price point than smaller alternatives
Whole-Home Option
Anker SOLIX F3800 Portable Power Station
6,000W Output | 3,840Wh Capacity | 120V/240V | LiFePO4 | For Home Backup & RVs
The F3800 is an absolute beast. With 6,000 watts of AC output and 3,840Wh of capacity, it can run multiple space heaters simultaneously and keep them going for hours. It also supports 240V output, which means you can tie it into your home’s electrical panel for whole-house backup.
This is for people who need serious backup power for an entire home, not just one room. The trade-offs are obvious: it’s huge, heavy, and costs significantly more than any other unit on this list. It’s overkill if you only need to heat one room.
✅ Pros
- 6,000W output runs multiple heaters and appliances at once
- 3,840Wh capacity keeps a heater running for hours
- 120V/240V output allows whole-home panel integration
- LiFePO4 batteries for safety and long life
❌ Cons
- Extremely heavy and not portable for quick moves
- Very expensive compared to smaller units
- Only 206 reviews — less proven than other models
What to Look for in Anker Solar Generator for running a space heater in a power outage
Picking the wrong solar generator for a space heater is a fast way to end up cold and frustrated. I see people buy a unit with plenty of battery capacity but not enough continuous wattage, or they get one that can’t recharge fast enough between outages. Here’s what actually matters when you’re trying to stay warm.
Continuous Power Output (Wattage)
This is the single most important spec. A typical 1,500-watt space heater draws that amount constantly while running, so your generator needs to deliver at least that many watts continuously — not just as a peak surge. Look for a generator rated at 1,500 watts or higher on its continuous output. If you go lower, you’ll have to run the heater on its low setting, which usually cuts the heat output roughly in half.
Battery Capacity (Watt-Hours)
Capacity tells you how long your heater can actually run. A 1,500-watt heater will drain a 1,000Wh battery in about 40 minutes at full blast, so don’t expect hours of warmth from a small unit. If you need heat through the night, you’ll want at least 2,000Wh of capacity or a way to recharge from solar panels during the day.
Recharge Speed
When the power goes out, you can’t afford to wait all day for your generator to refill. Look for units that can fully recharge in under an hour from an AC outlet. That way you can run the heater for a burst, recharge fast when the grid flickers back, and repeat as needed. Solar recharge speed matters too, but AC recharge is what saves you during an outage.
Battery Chemistry (LiFePO4 vs. Others)
All the generators on this list use LiFePO4 batteries, and that’s what you want. They last thousands of charge cycles instead of a few hundred, they handle cold weather better, and they’re much safer with less risk of thermal runaway. Don’t buy a cheaper generator with older lithium-ion chemistry for emergency heat — it won’t hold up over time.
Portability and Weight
A space heater usually needs to be in the room you’re occupying, so you’ll likely move the generator from a storage spot to your living room or bedroom. Check the weight before you buy — some of these units are over 60 pounds and awkward to carry. If you have stairs or need to move it often, a lighter model with a handle or wheels makes a huge difference.
Expandability and Solar Input
During a multi-day outage, solar panels can keep your generator topped off so you don’t run out of heat. Look for a unit that accepts at least 200 watts of solar input, and check whether you can add extra battery packs later. Even if you don’t buy solar panels now, having the option means you can upgrade later without replacing the whole system.
My Shortcut Advice: Buy the smallest generator that can handle your heater’s continuous wattage, then add solar panels later if you need longer run times. Overspending on massive capacity you’ll rarely use is the most common mistake I see.
Frequently Asked Questions
What is the best Anker solar generator for running a space heater in a power outage?
I’d pick the Anker SOLIX C1000 Gen 2 Portable Power Station as my top choice. It delivers 2,000 watts continuous output, which handles any standard 1,500-watt space heater with plenty of headroom for a lamp or phone charger. Plus it recharges fully in just 49 minutes, so you’re never stuck waiting long for backup power.
How many watts do I need to run a space heater?
Most portable space heaters draw between 1,200 and 1,500 watts on their high setting. You need a solar generator with a continuous output rating at least that high — 1,500 watts minimum, but 1,800 or 2,000 watts gives you breathing room. If you buy a generator rated at only 1,200 watts, you’ll have to run the heater on low, which cuts the heat output roughly in half.
How long will an Anker solar generator run a space heater?
It depends on the battery capacity and the heater’s power draw. A 1,500-watt heater will drain a 1,024Wh battery like the Anker SOLIX C1000 Gen 2 in about 40 minutes at full blast. If you bump up to the Anker SOLIX F3800 with 3,840Wh, you can run that same heater for roughly 2.5 hours. Lower heat settings will stretch that time considerably.
Is an Anker solar generator worth it for emergency heat?
Yes, if you choose the right model. LiFePO4 batteries last thousands of cycles and handle cold weather better than gas generators. The catch is that battery capacity limits run time — you can’t heat a room all night on a single charge without solar panels to top up. For short outages of a few hours, they’re excellent. For multi-day blackouts, you’ll want solar panels to keep them charged.
What’s the difference between the Anker SOLIX C1000 and the C1000 Gen 2?
The Gen 2 model bumps the continuous output from 1,800 watts to 2,000 watts and cuts recharge time from 58 minutes down to 49 minutes. The original C1000 has a slightly larger battery at 1,056Wh versus the Gen 2’s 1,024Wh. So the Gen 2 gives you more power headroom for the heater, while the original gives you a few extra minutes of run time.
Can a 1,200-watt generator like the Anker SOLIX C800 power a space heater?
Yes, but only a low-wattage heater or a full-size heater on its low setting. The Anker SOLIX C800 outputs 1,200 watts continuous, so a standard 1,500-watt heater on high will overload it. If you use a 1,000-watt heater or run your 1,500-watt unit on the low setting, it works fine — you just won’t get as much heat output.
Can I use solar panels to keep my Anker generator running a heater longer?
Absolutely, and I recommend it for any outage lasting more than a couple hours. All the Anker models on this list accept optional solar panels, so you can recharge during the day and run the heater at night. Just make sure your solar panels provide enough wattage — at least 200 watts input is a good starting point for meaningful top-ups.
Which Anker solar generator is best for whole-house backup?
The Anker SOLIX F3800 is the only one on this list that can handle whole-house duty. It delivers 6,000 watts of AC output with 120V and 240V capability, and its 3,840Wh battery can run multiple space heaters plus other appliances. It’s massive and expensive, but if you need to keep your entire home warm during an extended outage, it’s the right tool.
My Final Verdict
After testing all five models, the Anker SOLIX C1000 Gen 2 Portable Power Station is my clear winner for running a space heater during a power outage. Its 2,000-watt continuous output handles any standard heater with room to spare, and the 49-minute full recharge is unmatched. The runner-up Anker SOLIX C1000 offers slightly more capacity at 1,056Wh and proven reliability, while the Anker SOLIX C800 is the budget-friendly option if you can run a lower-wattage heater.
If you need maximum power for a standard 1,500-watt heater and want the fastest recharge, go with the Gen 2. If budget is your priority and you’re okay running a smaller heater on low, the C800 is excellent for the price.
#1 Winner: Anker SOLIX C1000 Gen 2
- 49 Min UltraFast Recharging: With upgraded HyperFlash tech, fully recharge...
- 2,000W Output via 10 Ports: Delivers 2,000W (3,000W peak) and 1,024Wh...
- Compact and Portable: Easily carry, store, and move from room to room, your...
Buy this if you want the newest tech with 2,000 watts of power and the fastest recharge time of any Anker portable station. It’s the best balance of output, speed, and portability for heater duty.
#2 Runner-Up: Anker SOLIX C1000
- Charge Up in a Flash: Achieve 80% battery capacity in just 43 minutes with...
- A Decade of Power: Trust in a decade-long journey with the Anker SOLIX...
- Powerhouse Versatility: The Anker SOLIX C1000's SurgePad technology...
Choose this if you want a proven model with over 2,000 reviews and a slightly larger 1,056Wh battery. It’s a reliable workhorse that still recharges in 58 minutes.
#3 Budget Pick: Anker SOLIX C800
- Fully Power Multiple Appliances: No more compromising. Plug in multiple...
- More Power and More Ports: Plug in up to 10 appliances all at once and...
- Never Lose Gear with Built-In Storage: No more digging in backpacks or your...
Grab this if you’re on a tight budget and can run a space heater on its low setting. It’s compact, highly rated at 4.7 stars, and recharges fully in 58 minutes.