C1000 Gen 2
- you keep a fridge running through an outage
- you run a microwave or a kettle: 2,000W
- you refill from 600W of solar
C300
- you carry it: 9.1 lb
- a router or CPAP is the job
- it costs $120 less
Prices and stock checked by our price engine on November 5, 2026 at 6:59 AM EST. Each product is rechecked several times a day; the time refreshes when you load the page.
$120 decides whether your fridge makes it through the night.
The Anker SOLIX C1000 Gen 2 stores 1,024Wh and runs 2,000W from five AC outlets, with a 49-minute wall refill and 600W of solar, at 24.9 lb. The Anker SOLIX C300 stores 288Wh and runs 300W from three outlets, refills to 80% in 50 minutes and takes 100W of solar, at 9.1 lb. Both use LFP cells and switch to battery in 10ms. For a router, a CPAP and phones on a camping trip, the C300 is enough and goes in a backpack; for a fridge, a microwave or a whole evening without power, it’s the C1000 Gen 2.
Below: what separates them with numbers, a 20-second calculator for your own gear, seven modeled situations, an expandable third option, and what published tests found.
The C1000 Gen 2 costs $120 more today for 3.6 times the battery, 2,000W instead of 300W, two more AC outlets and six times the solar input. The C300 answers with less than half the weight, the same 10ms UPS and a near-identical wall refill time.
- you keep a fridge going
- you run more than 300W
- you refill from 600W of solar
- you carry it: 9.1 lb
- a router or CPAP is the job
- you want it for $120 less
The five differences that decide it
The five gaps that decide the purchase, with the better spec for most buyers flagged. Both use LFP cells, switch to battery in 10ms, connect to the Anker app over Wi-Fi and Bluetooth, and share the same temperature ranges; neither takes an extra battery.
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 870Wh usable on the C1000 Gen 2 and 245Wh on the C300; OutdoorGearLab measured 230Wh out of a C300.
Appliance for appliance, the C1000 Gen 2 lasts 3.6 times as long as the C300.
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The price gap, in numbers
The Anker SOLIX C1000 Gen 2 costs $120 more than the Anker SOLIX C300 and adds 736Wh: that is $0.16 per extra Wh, against $1.49 per Wh for the C300.
Prices refresh daily from Anker US.Per watt-hour stored, the bigger battery is usually the better buy, and it is rated for 1,000 more cycles. The C300’s lower ticket buys portability, not value per Wh. Anker US prices move often; the figures here are refreshed daily by our price engine.
The third option: the Anker SOLIX C1000 at $499.99
Anker SOLIX C1000: $499.99 today
The first-generation C1000 is the one in this family with a battery port: 1,056Wh and 1,800W from six outlets, 2,400W SurgePad, 600W of solar and a 58-minute refill, expandable to 2,112Wh with one BP1000, at 28.4 lb. It gives up 200W of output and the 10ms UPS rating, and is rated for 3,000 cycles against 4,000 for the C1000 Gen 2. Pick it if you want to add a second kWh later; it is three times the C300’s weight. See the C1000 at Anker.
Seven modeled situations, worked out
Same formula as the calculator above: 85% of the rated capacity, no extra battery. The fridge averages 60W, about 525kWh a year.
24-hour outage, essentials only
The C1000 Gen 2 covers an evening and a night; the C300 under three hours. Neither covers a full day on its own.
Full-size fridge through an outage
About 14 hours on the C1000 Gen 2, about 4 on the C300. Check the fridge’s startup draw against the C300’s 600W surge rating before relying on it.
A 1,100W microwave
Only the C1000 Gen 2. The C300 stops at 300W; SurgePad lowers the power of heating loads, but a microwave isn’t one.
Wi-Fi router through an outage
Both switch to battery in 10ms, fast enough that the router doesn’t reboot. The C300 keeps it up for most of a day, the C1000 Gen 2 for about three.
CPAP, one night
The C1000 Gen 2 covers more than two nights. The C300 covers about six hours, short of a full night with the humidifier off.
Refill from solar, each at its maximum
The C1000 Gen 2 refills faster despite holding 3.6 times as much, because it takes six times the solar. The C300 needs one 100W panel and stops at 28V: wire panels in parallel.
Carrying it
The C300 goes in one hand or a backpack. The C1000 Gen 2 is a two-handle carry; OutdoorGearLab weighed it at 25.2 lb.
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.
C1000 Gen 2 and C300 weight, dimensions and full specifications
Weight: 24.9 lb for the C1000 Gen 2 and 9.1 lb for the C300. Dimensions: 15.1 × 8.2 × 9.6 in and 6.46 × 6.34 × 9.45 in. Everything else is in the sheet below.
Anker SOLIX C1000 Gen 2 and Anker SOLIX C300 full specifications
Every published figure for both units, grouped. Green marks the better value.
What’s in the box
C1000 Gen 2
- C1000 Gen 2 power station1,024Wh, 24.9 lb
- AC charging cable
- User manual
- Solar cable sold separately
C300
- C300288Wh, 9.1 lb
- AC charging cable
- User manual
- Solar cable sold separately
From the Anker US pages and manuals.
07 · ChargingHow fast each one refills
Shorter bar, faster refill. Each row is scaled to its slower unit.
C1000 Gen 2: UltraFast at 1,600W needs the battery above 68°F; OutdoorGearLab averaged about 1,100W from the wallC300: OutdoorGearLab charged it from empty to full in 63 minutes on the supplied AC cord
Our solar times assume panels deliver 70% of their rating; the brands’ figures assume ideal sun.
Every port, side by side
C1000 Gen 2
C300
Practical consequence: the C1000 Gen 2 has five AC outlets and the C300 three; both have a 12V car socket. The C300 has the stronger USB-C side, with two 140W ports, one of which also recharges it.
09 · NoiseNoise: C1000 Gen 2 vs C300
Both are quiet at light loads. The Anker SOLIX C1000 Gen 2 rises to about 45dB at 1 m under high output and fast charging (Notebookcheck); the Anker SOLIX C300 is rated at 25dB from 3.3 ft and reviewers barely heard it.
C300 observations come from UK and EU units.Every figure we found, with its source
What reviewers heard: Near maximum wattage the fan gets loud (OutdoorGearLab).
What reviewers heard: A very quiet hum or slight hiss in normal use (Basic Tutorials, EU unit).
Measured by a tester Brand figure
- Charge the C1000 Gen 2 during the day, or lower its charging speed in the app overnight.
Cold and heat: C1000 Gen 2 vs C300
Same limits: the Anker SOLIX C1000 Gen 2 and the Anker SOLIX C300 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.- Charge either one indoors in winter: neither charges below 32°F.
- On the C1000 Gen 2, UltraFast only engages above 68°F of battery temperature (Anker).
App, UPS and smart features
Same 10ms UPS and the same app: the Anker SOLIX C1000 Gen 2 adds a 1,600W fast-charging mode and a Time-of-Use mode; the Anker SOLIX C300 charges at 330W.
Neither takes an extra battery.Green zone: a switch under about 16ms, which most desktop PCs ride through without restarting.
Can it charge off-peak? Anker lists a Time-of-Use mode for the Anker SOLIX C1000 Gen 2; the Anker SOLIX C300 page doesn’t mention one.
Does it work as a UPS? Both switch to battery in 10ms per Anker, fast enough for a router or a CPAP.
Does it have a fast charging mode? The Anker SOLIX C1000 Gen 2 reaches 49 minutes with UltraFast above 68°F of battery temperature. The Anker SOLIX C300 charges at 330W and reaches 80% in 50 minutes.
How does the app connect? Both use the Anker app over Wi-Fi or Bluetooth.
Can you add a battery later? Neither the Anker SOLIX C1000 Gen 2 nor the Anker SOLIX C300 takes an extra battery.
Warranty and support
5 years on both: the Anker SOLIX C1000 Gen 2 once registered with Anker, the Anker SOLIX C300 per its Anker US page.
Same term; the C1000 Gen 2 is rated for 1,000 more cycles.Subject to each brand’s warranty terms and eligibility.
Anker rates the C1000 Gen 2 at 4,000 cycles to 80% capacity and the C300 at 3,000+, about 11 and 8 years at one full cycle a day. Calendar aging and heat also reduce capacity, so read the ratings as ceilings.
- Register the C1000 Gen 2 with Anker when it arrives: that activates its 5-year coverage.
- Keep proof of purchase for either one.
What reviewers report
We have not lab-tested these two units. Here is what 9 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.
C1000 Gen 2: OutdoorGearLab (July 2026), Notebookcheck (December 2025, EU unit), CleanTechnica (September 2025), MacRumors (December 2025), Techaeris (November 2025)C300: OutdoorGearLab (July 2026), Trusted Reviews (December 2024, UK unit), Basic Tutorials (March 2026, EU unit), LanOC Reviews (November 2024)
Usable capacity
- C1000 Gen 2Reviewer Their load bank measured 890Wh of the rated 1,024Wh, about 87%, well above average. OutdoorGearLab, Kenji Mowrey, July 2026
- C1000 Gen 2Reviewer At a steady 250W load (230V) it gave 850Wh, 83%, before stopping at 1%; lower with fluctuating loads. Notebookcheck, Marcus Schwarten, December 2025, EU unit
- C300Reviewer Measured 230Wh of usable energy from the rated 288Wh, about 80%, which they found underwhelming for a small battery. OutdoorGearLab, Kenji Mowrey, July 2026
- C300Reviewer From a full charge the AC outlets gave 240Wh at 100W and 238Wh at 200W. UK 230V inverter, battery data usable. Trusted Reviews, Simon Handby, December 2024, UK unit
Charging
- C1000 Gen 2Reviewer Without the app’s boost mode AC charging took just under 55 minutes; 1,110Wh flowed in. EU charging power, flag. Notebookcheck, Marcus Schwarten, December 2025, EU unit
- C1000 Gen 2Reviewer Recharged to full in 49 minutes from a standard plug, drawing about 1,200W; 1,600W needs enabling. MacRumors, Juli Clover, December 2025
- C300Reviewer With the supplied AC cord it charged from empty to full in 63 minutes. OutdoorGearLab, Kenji Mowrey, July 2026
- C300Reviewer A mains recharge at 330W took 66 minutes and drew 333Wh from the wall. UK mains unit, flag charging power. Trusted Reviews, Simon Handby, December 2024, UK unit
- C300Reviewer Mains and USB or solar charging cannot be combined; it switches to mains only once AC is present. Trusted Reviews, Simon Handby, December 2024, UK unit
Noise and heat
- C1000 Gen 2Reviewer Near maximum wattage the fan gets frustratingly loud, an issue carried over from the first generation. OutdoorGearLab, Kenji Mowrey, July 2026
- C1000 Gen 2Reviewer Measured about 45dB at 1m under high output and fast AC charging; much quieter at low load. Notebookcheck, Marcus Schwarten, December 2025, EU unit
- C1000 Gen 2Reviewer At very high charging rates the fans kick on loudly. CleanTechnica, Kyle Field, September 2025
- C300Reviewer During mains charging it stayed reasonably cool with barely any fan noise. Trusted Reviews, Simon Handby, December 2024, UK unit
- C300Reviewer Barely audible in normal use, a very quiet hum or slight hiss, consistent with the 25dB claim. Basic Tutorials, Simon Lüthje, March 2026, EU unit
UPS and output
- C1000 Gen 2Reviewer It ran a refrigerator and gear flawlessly over a 4-day Cybertruck road trip used as a buffer battery. CleanTechnica, Kyle Field, September 2025
- C300Reviewer Usable as a basic UPS thanks to the 10ms switchover, though they would pick a dedicated UPS first. OutdoorGearLab, Kenji Mowrey, July 2026
- C300Reviewer Verdict: fine for devices and small appliances, but not something to rely on through a power outage. OutdoorGearLab, Kenji Mowrey, July 2026
- C300Reviewer At a full 300W load the UK unit cut out immediately; a mixed load of about 255W ran fine. Flag: UK inverter. Trusted Reviews, Simon Handby, December 2024, UK unit
- C300Reviewer A PC drawing 94W ran for 2 hours 13 minutes from 81% charge, close to the 2.2-hour app estimate. LanOC Reviews, Wes Compton, November 2024
Daily use and issues
- C1000 Gen 2Reviewer Measured weight 25.2 lb, one of the best power-to-weight ratios they have tested. OutdoorGearLab, Kenji Mowrey, July 2026
- C1000 Gen 2Reviewer Compared with Gen 1 it lost the expansion port and the built-in LED light. Notebookcheck, Marcus Schwarten, December 2025, EU unit
- C1000 Gen 2Reviewer At 24.9 lb it is easy to lift with one hand. CleanTechnica, Kyle Field, September 2025
- C300Reviewer Measured weight was 9.1 lb, light enough to carry in a backpack to a campsite. OutdoorGearLab, Kenji Mowrey, July 2026
- C300Reviewer A sliding cover blocks the 140W USB-C port whenever the solar input is in use. OutdoorGearLab, Kenji Mowrey, July 2026
Practical limits before you buy
- The C300 stops at 300W. A microwave, a kettle, a coffee maker or a hair dryer won’t run on it.
- Neither takes an extra battery. The original C1000 below has a battery port.
- The C1000 Gen 2’s 49-minute refill needs UltraFast, which only engages above 68°F of battery temperature.
- The C300’s solar input stops at 28V. Wire panels in parallel, not in series.
- On the C300, a sliding cover blocks the 140W USB-C port while the solar input is in use, per OutdoorGearLab.
- Neither ships with a solar cable, per Anker’s box lists.
- Neither charges below 32°F. Bring it indoors to charge in winter.
- C1000 Gen 2, per its US documentation: UltraFast charging only activates when battery temperature is above 68F (20C); charging at 32-68F is significantly slower.
- C1000 Gen 2, per its US documentation: USB-A and USB-C1 share a 20W total limit; only USB-C2 reaches 140W.
- C1000 Gen 2, per its US documentation: Not expandable; Anker recommends the original C1000 for users who need extra capacity.
- C1000 Gen 2, per its US documentation: Normal AC charging 1,200W max; AC bypass 1,800W max; solar 600W, 60V max.
- C300, per its US documentation: USB-C recharging and XT-60 (solar or car) recharging cannot be used at the same time; a sliding cover blocks one port.
Frequently asked questions
What is the difference between the Anker C1000 Gen 2 and the C300?
Size. The C1000 Gen 2 stores 1,024Wh and runs 2,000W from five AC outlets, with 600W of solar, at 24.9 lb. The C300 stores 288Wh and runs 300W from three outlets, with 100W of solar, at 9.1 lb. Both have a 10ms UPS, LFP cells and the Anker app.
Which is cheaper?
The Anker SOLIX C300 costs $120 less today: $429.99, against $549.99 for the Anker SOLIX C1000 Gen 2. Prices refresh daily; the price section above has the full breakdown.
Can the C300 run a fridge?
Yes, a fridge averaging 60W for about 4 hours, if its startup draw stays within the 600W surge rating. The C1000 Gen 2 runs the same fridge for about 15 hours.
Can the C300 run a microwave?
No. It stops at 300W. The C1000 Gen 2 runs a 1,100W microwave for about 47 minutes.
Do both work as a UPS?
Yes. Both switch to battery in 10ms, per Anker.
Which refills faster?
From a wall outlet, about the same: 49 minutes to full for the C1000 Gen 2 in UltraFast, 50 minutes to 80% for the C300. From solar, the C1000 Gen 2, with 600W of input against 100W.
How much do they weigh?
24.9 lb for the C1000 Gen 2 and 9.1 lb for the C300, per Anker.
What warranty do they have?
5 years on both: the C1000 Gen 2 once registered, the C300 per its Anker US page.
Related comparisons and reviews
How we compared and sources
Research-based comparison. We have not physically tested these two units. Specs come from Anker US: the C1000 Gen 2 product page and the C300 product page and US user manual. Usage observations are attributed to named reviewers. Checked on October 31, 2026.
- Specs: Anker US, C1000 Gen 2, Anker US, C300 and its US user manual (A1722), read on October 31, 2026.
- Reviewer reports on the C1000 Gen 2: OutdoorGearLab, Kenji Mowrey, July 2026, Notebookcheck, Marcus Schwarten, December 2025, EU unit, CleanTechnica, Kyle Field, September 2025, MacRumors, Juli Clover, December 2025, Techaeris, Alex Hernandez, November 2025; on the C300: OutdoorGearLab, Kenji Mowrey, July 2026, Trusted Reviews, Simon Handby, December 2024, UK unit, Basic Tutorials, Simon Lüthje, March 2026, EU unit, LanOC Reviews, Wes Compton, November 2024.
- 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).
1,024Wh and 2,000W against 288Wh and 300W. Same 10ms UPS; the C300 weighs 9.1 lb.
Prices checked November 5, 2026 at 6:59 AM EST
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Originally published: November 5, 2026