C800
- you already own one
- it goes in the car: 23.15 lb
- one night of a fridge is enough
F3800 Plus
- you run 240V loads: well pump, dryer
- you want days of backup, up to 26.9kWh
- you have 3,200W of solar
Prices and stock checked by our price engine on November 5, 2026 at 4:31 AM EST. Each product is rechecked several times a day; the time refreshes when you load the page.
One rides in the trunk. The other rolls into the garage and gets wired to the house.
The Anker SOLIX C800 stored 768Wh and delivered 1,200W from five 120V outlets, with 300W of solar and a 58-minute refill, at 23.15 lb; Anker US no longer sells it, and its page redirects to the C1000 Gen 2. The Anker SOLIX F3800 Plus stores 3,840Wh and delivers 6,000W at 120V and 240V, takes 3,200W of solar and up to six extra batteries for 26.9kWh, at 135.6 lb on wheels. They don’t compete: the C800 was a camping and desk box, the F3800 Plus is a home backup system. Pick by the job, not the spec sheet.
Below: what separates them with numbers, a 20-second calculator for your own gear, seven modeled situations, a middle option, and what published tests found on the F3800 Plus.
Five times the battery, five times the output, 240V, ten times the solar input and a path to 26.9kWh on the F3800 Plus; a 23-lb box you can carry on the C800. Anker US no longer sells the C800 and listed the F3800 Plus as sold out on October 31, 2026.
- you carry it to camp
- one night of a fridge is the job
- you own one that works
- you want 240V and a home panel
- you need days, not hours
- you have a big solar array
The five differences that decide it
Both use LFP cells and the Anker app over Wi-Fi and Bluetooth, and Anker rated both for 3,000+ cycles, and both carry 5 years of warranty, the F3800 Plus once registered with Anker. Past that, they are built for different jobs.
Will it run your setup? Check in 20 seconds
Estimates use 85% usable capacity and 70% of rated solar output. Real results vary with temperature, inverter load, shade and appliance cycling. Fridge and freezer watts are daily averages and do not include compressor startup surges.
Runtime by appliance, one at a time
Simple energy estimates, not measured runtimes. About 653Wh usable on the C800 and 3264Wh on the F3800 Plus, before any extra battery. PCMag notes the F3800 Plus draws 30 to 40W on its own while running, which shortens long outages.
Appliance for appliance, the F3800 Plus lasts 5.0 times as long as the C800.
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What the current options cost today
Anker US listed the F3800 Plus as sold out on October 31, 2026; the engine shows the last price it read. The F3800 Plus only makes sense if you need that much energy; the figures above compare cost per watt-hour at today’s prices. Prices move often.
The third option: the Anker SOLIX C2000 Gen 2 at $999.99
Anker SOLIX C2000 Gen 2: $999.99 today
Between a portable and a home battery: 2,048Wh and 2,400W from five 20A outlets plus a TT-30 for an RV, 800W of solar, a 10ms UPS and one BP2000 Gen 2 for 4,096Wh, at 41.7 lb. It has no 240V output. Pick it if you want a full day of backup and an RV hookup without the F3800 Plus’s size and weight; it was in stock at Anker US on October 31. Our C2000 Gen 2 review goes deeper. See the C2000 Gen 2 at Anker.
Seven modeled situations, worked out
Same formula as the calculator above: 85% of the rated capacity, no extra battery unless the card says so. The fridge averages 60W.
24-hour outage, essentials only
About 7 hours on the C800, about a day and a half on the F3800 Plus before any extra battery, a bit less once its own 30 to 40W draw is counted (PCMag).
Full-size fridge through a long outage
Half a day on the C800, more than two days on the F3800 Plus. PCMag ran a full-size fridge about 63 hours on an F3800 Plus with an expansion battery.
A 240V well pump
Only the F3800 Plus has 240V, through its L14-30R outlet or a Home Power Panel. The C800 is 120V only.
A weekend of camping
The C800 covers a weekend with a 100W panel topping it up, and goes in the trunk. The F3800 Plus lasts longer but weighs 135.6 lb; it’s an RV or a garage unit.
Home office through an outage
Both switch in 20ms per Anker; the F3800 Plus only on its three left outlets, with 1,440W of pass-through. PCMag kept a desktop workstation running through simulated outages on it.
Refill from solar, each at its maximum
The F3800 Plus refills five times the battery in less sun, if you have a roof-sized array; its inputs take up to 165V, so panels can run in series.
Carrying it
The C800 is a one-hand carry. The F3800 Plus rolls on wheels and a handle; AppleInsider found small bumps could stop the wheels.
Nine more differences, the spec sheet and the box
Smaller gaps that rarely decide the purchase, then the full specifications and what ships in the box.
C800 and F3800 Plus weight, dimensions and full specifications
Weight: 23.15 lb for the Anker SOLIX C800 and 135.6 lb for the F3800 Plus (user guide; 136.7 lb on the US page). Dimensions: 14.61 × 8.07 × 9.96 in and 27.6 × 15.3 × 15.6 in. Everything else is in the sheet below.
Anker SOLIX C800 and Anker SOLIX F3800 Plus full specifications
Every published figure for both units, grouped. Green marks the better value.
What’s in the box
C800
- C800 power station768Wh, 23.15 lb
- AC charging cable
- Car charging cable
- User manual
- Built-in storage compartmentunder the lid
F3800 Plus
- F3800 Plus power station3,840Wh, 135.6 lb
- AC charging cable
- Solar charging cables × 2
- User manual
- Generator Input Adapter sold separatelyneeded for 240V generator charging
C800 contents from its archived US page and manual; F3800 Plus contents from Anker US.
07 · ChargingHow fast each one refills
Shorter bar, faster refill. Each row is scaled to its slower unit.
C800: 750W by default and 1,100W in UltraFast, per Anker’s archived US pageF3800 Plus: PCMag measured about 9,000Wh from the wall to refill it with an expansion battery, about 85% round trip
Our solar times assume panels deliver 70% of their rating; the brands’ figures assume ideal sun.
Every port, side by side
C800
F3800 Plus
Practical consequence: the C800 has five 120V outlets, two USB-C, two USB-A and a 12V socket. The F3800 Plus adds what a house needs: an L14-30R for 240V, a TT-30R for an RV, six 20A outlets, a Home Power Panel and generator input, and an expansion port.
09 · NoiseNoise: C800 vs F3800 Plus
Anker publishes no rating for either. AppleInsider found the Anker SOLIX F3800 Plus whisper-quiet until heavily loaded, then up to about 60dB; we found no measurement of the Anker SOLIX C800.
No distance given for the F3800 Plus figure.Every figure we found, with its source
No decibel figure published.
What reviewers heard: Quiet until heavily loaded, then the fans ramp up (AppleInsider).
Measured by a tester Brand figure
- Put the F3800 Plus in a garage or utility room; it’s built to stay there.
Cold and heat: C800 vs F3800 Plus
Same limits: the Anker SOLIX C800 and the Anker SOLIX F3800 Plus charge from 32°F to 104°F and run from −4°F to 104°F, per Anker. Neither has a water rating.
Figures from Anker US for both.- Keep the F3800 Plus in a heated space in winter, and charge the C800 indoors: neither charges below 32°F.
App, UPS and smart features
Both switch in 20ms. The Anker SOLIX F3800 Plus adds the home features: Home Power Panel, Storm Guard, EV mode, generator input and six extra batteries.
Both use the Anker app over Wi-Fi and Bluetooth.Green zone: a switch under about 16ms, which most desktop PCs ride through without restarting.
Can it power a home circuit? The Anker SOLIX F3800 Plus connects to Anker’s Home Power Panel or a transfer setup and delivers 240V; the Anker SOLIX C800 is a 120V portable.
Can you add a battery later? The Anker SOLIX F3800 Plus grows to 26.9kWh; the Anker SOLIX C800 has no battery port.
Does it work as a UPS? Both switch in 20ms per Anker; the Anker SOLIX F3800 Plus only on its three left outlets, with 1,440W of pass-through. PCMag kept a workstation running through simulated outages on it.
Does it have a fast charging mode? The Anker SOLIX C800 refills in 58 minutes in UltraFast. The Anker SOLIX F3800 Plus takes 1,800W from a wall outlet, and much more from 3,200W of solar or a 240V generator.
Warranty and support
5 years on both, per Anker US: the Anker SOLIX C800 per its archived spec table (an existing unit keeps the term it was sold with), the Anker SOLIX F3800 Plus per its US page, once registered with Anker.
Same term; both rated for 3,000+ cycles.Subject to each brand’s warranty terms and eligibility.
Anker rates the C800 at 3,000+ cycles to 80% and the F3800 Plus at 3,000+ cycles without naming an end-of-life capacity. A home battery that sits on standby cycles far less often than a camping box.
- Register a new F3800 Plus with Anker: its registration page says that activates the 5-year coverage.
- Buying a C800 from a remaining seller, check that it is new and that Anker’s warranty applies.
What reviewers report
We have not lab-tested these two units. Here is what 4 published reviews found, with the source, author and date for each point. Reviews of UK and EU units are flagged: those models charge from 230V outlets and have different sockets, so their charge times and outlet findings don’t carry over to US units.
C800: no verifiable independent test foundF3800 Plus: PCMag (May 2026), How-To Geek (March 2025), AppleInsider (August 2025), Gear Diary (April 2025)
Usable capacity
- F3800 PlusReviewer With an expansion battery it ran a full-size fridge about 63 hours, delivering roughly 4,248Wh of AC. PCMag, Michael Lydick, May 2026
- F3800 PlusReviewer Running AC, fridge, lights and TV off-grid, the display estimated about two hours. Gear Diary, Travis Ehrlich, April 2025
Charging
- F3800 PlusReviewer Refilling from empty took roughly 9,000Wh from the wall, about 85% round-trip efficiency. PCMag, Michael Lydick, May 2026
- F3800 PlusReviewer Solar input rises to 3,200W and 165V, so third-party panels can run in series. How-To Geek, Bertel King, March 2025
- F3800 PlusReviewer A PS400 solar panel easily gave 170W or more in testing. AppleInsider, Wesley Hilliard, August 2025
Noise and heat
- F3800 PlusReviewer Whisper-quiet until heavily loaded; then fans may reach 60 decibels (no distance given). AppleInsider, Wesley Hilliard, August 2025
UPS and output
- F3800 PlusReviewer Kept a desktop workstation running through simulated outages without a reboot. PCMag, Michael Lydick, May 2026
- F3800 PlusReviewer The 240V port was replaced by a 120V TT-30R, a loss for users of a 50A home inlet. How-To Geek, Bertel King, March 2025
Daily use and issues
- F3800 PlusReviewer Background draw averages about 30 to 40W while operating, which adds up over days. PCMag, Michael Lydick, May 2026
- F3800 PlusReviewer The original F3800 uses over 1kWh a day idle; the Plus draws slightly less, maybe an extra hour or two. How-To Geek, Bertel King, March 2025
- F3800 PlusReviewer Weighs 136.7 lb; small bumps can stop the wheels. AppleInsider, Wesley Hilliard, August 2025
- F3800 PlusReviewer Easy to move with the trolley handle despite weighing 132.3 lb. Gear Diary, Travis Ehrlich, April 2025
Practical limits before you buy
- Anker US no longer sells the C800. Its page redirects to the C1000 Gen 2.
- Anker US listed the F3800 Plus as sold out on October 31, 2026. Check back, or look at the C2000 Gen 2 below.
- The F3800 Plus draws power on its own: PCMag measured about 30 to 40W while operating, which adds up over a multi-day outage.
- The F3800 Plus replaced the original F3800’s 50A 240V port with a 120V TT-30R, per How-To Geek; its 240V output is the L14-30R.
- Only three outlets of the F3800 Plus are on the UPS, limited to 1,440W of pass-through.
- The C800 stops at 1,200W and 120V. SurgePad runs heaters above that at reduced power.
- Neither charges below 32°F. Keep the F3800 Plus in a heated space in winter.
- C800, per Anker’s archived US page and manual: SurgePad does not work in bypass mode and suits heating devices, not precision instruments.
- C800, per Anker’s archived US page and manual: The USB-C ports are output only.
- C800, per Anker’s archived US page and manual: Solar input is 11 to 60V, 10A, 300W max, through an XT-60 connector.
- C800, per Anker’s archived US page and manual: In storage, check the charge weekly and charge it to 100% at least every 3 months.
- F3800 Plus, per its US documentation: The 240V output cannot be used while the unit charges from 120V AC.
Frequently asked questions
What is the difference between the Anker C800 and the F3800 Plus?
The job. The C800 was a 768Wh, 1,200W portable at 23.15 lb. The F3800 Plus is a 3,840Wh, 6,000W home battery with 120V and 240V, 3,200W of solar and up to 26.9kWh with six BP3800, at 135.6 lb on wheels.
Is the C800 still sold?
Not by Anker US: its page redirects to the C1000 Gen 2.
Is the F3800 Plus in stock?
Anker US listed it as sold out on our October 31, 2026 check; the page is still online.
Can the C800 run a well pump?
Not a 240V one: it is 120V only and stops at 1,200W. The F3800 Plus runs 240V loads through its L14-30R outlet or a Home Power Panel.
How long will each run a refrigerator?
At a 60W average, about 11 hours on the C800 and 54 hours on the F3800 Plus before any extra battery.
Do both work as a UPS?
Both switch in 20ms, per Anker; on the F3800 Plus only the three left outlets, with 1,440W of pass-through.
How much do they weigh?
23.15 lb for the C800 and 135.6 lb for the F3800 Plus, per Anker’s user guide (136.7 lb on the US page).
What warranty do they have?
5 years on both, per Anker US; the F3800 Plus’s 5 years apply once it is registered with Anker.
Related comparisons and reviews
How we compared and sources
Research-based comparison. We have not physically tested these units. C800 specs come from Anker’s US page as archived on May 19, 2026 and its US user manual (A1753), because Anker US no longer lists it. F3800 Plus specs come from its Anker US page and US user guide (A1790P). Usage observations are attributed to named reviewers. Checked on October 31, 2026.
- Specs: Anker US, C800 (archived May 19, 2026) and its US user manual (A1753); ankersolix.com/products/c800 now returns a permanent redirect to the C1000 Gen 2. Anker US, F3800 Plus and its US user guide (A1790P), read on October 31, 2026; where the page (136.7 lb) and the guide (135.6 lb) differ on weight, we show both.
- Reviewer reports on the F3800 Plus: PCMag, Michael Lydick, May 2026, How-To Geek, Bertel King, March 2025, AppleInsider, Wesley Hilliard, August 2025, Gear Diary, Travis Ehrlich, April 2025.
- Runtime = capacity × 0.85 ÷ watts. Solar harvest = min(panel watts, max input) × sun hours × 0.70. Cost per lifetime kWh = price ÷ (cycles × capacity in kWh).
768Wh you carry against 3,840Wh and 240V for the house. Anker US no longer sells the C800.
Prices checked November 5, 2026 at 4:31 AM EST
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Originally published: November 5, 2026