Disclosure: I earn a commission if you buy through links on this page, at no extra cost to you. As an Amazon Associate I earn from qualifying purchases. Here's how I review generators.
Anker SOLIX C1000 Gen 2 Review: Small Battery, Big Peace of Mind
By Justin · Updated September 25, 2026
Not everyone needs to back up a whole house. Sometimes the goal is just to keep the fridge cold, the internet up, the phones charged, and a CPAP running through the night. That's what the C1000 Gen 2 is for, and it does it well. It's a 1,024Wh, 2,000-watt power station that weighs about 25 pounds and recharges from the wall in under an hour.
Buy it if you want an affordable, grab-and-go battery for the essentials in short outages: fridge, internet, lights, phones, medical devices. It's also great for camping.
Skip it if you need 240V, a transfer switch hookup, or power for more than a day without recharging. Look at the DELTA Pro 3 or a generator instead.
Check current price of the Anker SOLIX C1000 Gen 2 on Amazon
C1000 Gen 2 Specs at a Glance
| Spec | Anker SOLIX C1000 Gen 2 |
|---|---|
| Capacity | 1,024Wh, LiFePO4 |
| Cycle life | 80% capacity after 4,000 cycles |
| AC output | 2,000W continuous, 3,000W surge, 120V |
| Ports | 10 total: AC outlets, USB-C, USB-A, 12V car socket |
| AC charging | 1,600W: about 49 minutes to full (UltraFast), about 58 minutes standard |
| Solar input | Up to 600W |
| UPS switchover | 10 ms |
| Expandable | No |
| Weight | About 24.9 lbs |
| Size | 15.1 × 8.2 × 9.6 in |
| Weather resistance | None. Keep it dry |
Specs from Anker SOLIX as of September 2026.
What I Like
It recharges in under an hour
This is the feature that matters most in real outages. Power often flickers back on for a few hours before going out again, or you can charge at a friend's house, the office, or a warming center. In 49 minutes the C1000 Gen 2 is full again. Bigger batteries take hours. Owners say solar charging is quick too, a little under 2 hours with a full 600W of panels.
You can actually carry it
About 25 pounds, with a handle. You can move it from the kitchen to the bedroom at night for a CPAP, or throw it in the car for camping. None of the big home batteries can do that.
2,000 watts is plenty for the essentials
2,000W continuous (3,000W surge) starts a fridge or chest freezer, runs a microwave or coffee maker, and powers a small space heater for a short while. For a battery this size, that's a lot of output. Owners report running TVs, fridges, laptops, and even small home offices from it without trouble.
Owners like the build, and Anker's support
People consistently say it feels solid and works exactly as advertised on AC charging. When something does go wrong, owners describe Anker's support as responsive and helpful. That matters more than people think with battery gear. Plenty of owners also say it paid for itself after two or three outages or camping trips.
A UPS for your router, computer or CPAP
Leave it plugged in, and with a 10 ms switchover, your internet or CPAP won't even blink when the power drops.
Long battery life
Rated for 80% capacity after 4,000 cycles. Anker says that's up to about 10 years of use.
What I Don't Like
1kWh goes quickly
That's the trade-off for the size. A fridge alone will run for roughly 6 hours. Add a freezer, internet and lights, and you're around 3–4 hours. It's a bridge for short outages, or something to pair with solar, not a multi-day solution by itself.
No 240V and no expansion
It's 120V only, so it won't run a well pump or connect to a home transfer switch. There's no expansion battery option either. If you think you'll outgrow it, start with something bigger.
Pumps and big compressors can trip it
Motors pull several times their running watts for a split second when they start. Well pumps, big compressors, and some power saws can go past the 3,000W surge rating even if their running watts look fine. Owners report exactly this. It's great for fridges, not for pumps.
Solar needs adapters
Solar input tops out at 600W, which is plenty for this size, but owners note it doesn't come with common MC4 or XT-60 solar connectors. Check what your panels use and budget for an adapter cable.
Standby drain on some units
Some owners report losing around 30% overnight with nothing plugged in. Others say theirs holds charge fine. If it's your emergency battery, top it off every month or two, and check how much it loses over a few days while you can still return it.
Keep it dry, and check the return policy
It isn't weather-resistant, and the ports are exposed, so keep it under cover when camping or tailgating. Some buyers also say they were told it couldn't be returned because of battery shipping rules. Read the return terms on the listing before you buy.
What Can It Keep Running?
Plan on about 85% of the 1,024Wh reaching your devices, or roughly 870Wh.
| What's running | Average draw (approx.) | C1000 Gen 2 runtime |
|---|---|---|
| CPAP (no heated humidifier) | 40 W | About 20 hrs (2+ nights) |
| Internet + phones + a few LED lights | 75 W | About 11–12 hrs |
| Refrigerator (cycling) | 150 W | About 6 hrs |
| Fridge + chest freezer + internet + lights | 300 W | About 3 hrs |
| Microwave | 1,000–1,200 W | Fine in short bursts |
A CPAP with a heated humidifier uses a lot more power. Check your machine's manual.
Fridge runtime varies a lot. Some owners report 21+ hours on one fridge, which fits a newer, efficient fridge that averages 40–50 watts over the day. An older or bigger fridge can easily average three times that. If you have a plug-in watt meter, measure your fridge over a day. It's the best $20 you'll spend on outage planning.
C1000 Gen 2 vs the Big Home Batteries
| C1000 Gen 2 | Bluetti Apex 300 | DELTA Pro 3 | |
|---|---|---|---|
| Capacity | 1,024Wh | 2,765Wh | 4,096Wh |
| Output | 2,000W, 120V | 3,840W, 120/240V | 4,000W, 120/240V |
| Full AC recharge | ~49 min | Faster with add-ons | ~1.7 hrs |
| Weight | ~25 lbs | ~84 lbs | ~114 lbs |
| Transfer switch hookup | No | Yes | Yes |
Questions People Ask
Will the Anker C1000 Gen 2 run a refrigerator?
Yes. A typical fridge averages 100–200 watts over time, so expect roughly 4–8 hours from a full charge.
Can it run a CPAP overnight?
Easily, without a heated humidifier. At about 40 watts, a full charge covers two nights or more.
Can I expand the battery?
No. Unlike the original C1000, the Gen 2 isn't expandable. If you want more runtime and can still carry it, the Jackery Explorer 2000 v2 has twice the battery. For expandable home backup, look at the DELTA Pro 3 or the Bluetti Apex 300.
How fast does it charge?
About 49 minutes from the wall in UltraFast mode, about 58 minutes in standard mode, or around 2 hours on 600W of solar.
How I Put This Review Together
I haven't run this unit myself. This review is based on Anker's published specs, what owners report after using it, and the runtime math. If I get one in to test, I'll add my own numbers here.
Bottom Line
The C1000 Gen 2 is the backup battery I'd suggest to most people who don't want a generator. It keeps the fridge, internet, phones and CPAP going through the short outages that happen most often, recharges in under an hour, and it's light enough to carry. Pair it with a couple of solar panels, or use it alongside a generator, and it goes a lot further.