Anker SOLIX C1000 review: a 1 kWh station for the fridge with room to grow

This is a research-based review, based on manufacturer specs and published data. We do not test products. Figures come from Anker's SOLIX C1000 product page, checked November 1, 2026, and from the federal sources cited below.

The C1000 is one of the most common answers to the question most outage buyers ask: what is the smallest battery that will keep my refrigerator cold? At 1,056 Wh with 1,800 W of continuous output, it sits in the same class as the Jackery Explorer 1000 v2 and EcoFlow DELTA 3 Plus. Where it differs is the expansion battery, the six AC outlets and a solar input that accepts up to 600 W.

Anker also sells a newer C1000 Gen 2 (1,024 Wh, 2,000 W, per Anker's support site) with different specs. Everything in this review refers to the original C1000, so match the model name on the listing before you buy.

Who should buy it

• Households that want a fridge-capable battery now and the option to double runtime later without replacing the unit.
• Homes that need more than three AC outlets at once: fridge, lamp, router, a fan and a TV.
• Buyers planning a bigger solar array. 600 W of input is 50% more than the Jackery Explorer 1000 v2 accepts.
• People who want app control: Anker lists Wi-Fi and Bluetooth, adjustable AC recharge speed and power scheduling.

Who should skip it

• Anyone who must carry the unit up stairs often. At 28.44 lb it is a two-hand carry; the Jackery Explorer 1000 v2 is 23.8 lb.
• Homes with 240 V needs such as a well pump. Those need a whole-home unit like the EcoFlow DELTA Pro 3 or a generator through an electrician-installed transfer switch.
• CPAP users who need a guaranteed full night. Anker's page makes no medical-use claim; check with your equipment supplier and read our sister site's CPAP backup power guide.

Strengths

• Expandable to 2,112 Wh. One matching expansion battery doubles capacity, which turns a one-day fridge battery into a two-day one.
• Six AC outlets. No power strip needed for a typical outage setup.
• Fast wall recharge. Anker lists 1,300 W AC input and 0 to 100% in 58 minutes. If power returns briefly, or you can reach a generator or a warming center, a short window refills it.
• 600 W solar input. Anker specifies 11 to 60 V through an XT-60 connector, with 10 A max at 11 to 32 V and 12.5 A max at 32 to 60 V.
• Certifications listed. Anker's FAQ says SGS certified the C1000 to UL 1012, UL 1778, UL 1973 and UL 60730.
• 5-year warranty listed on Anker's spec sheet, with a 10-year lifespan claim.

Drawbacks

• Surge is lower than rivals. 2,400 W surge against 3,000 W (Jackery 1000 v2) and 3,600 W (DELTA 3 Plus). Most refrigerators start fine, but a large compressor or a well-used chest freezer may trip it.
• SurgePad is for heat, not electronics. Anker says SurgePad activates when total output exceeds the rated output, works best with heat-generating devices, and does not support precision instruments.
• Narrow temperature window. Anker lists charging at 32 to 104°F and discharging at -4 to 104°F. Keep it indoors in winter and out of a hot garage in summer.
• No published UPS switchover time. Anker advertises UPS transfer but the spec line for switch time was blank on the page we checked. Do not assume it is fast enough for a desktop computer.
• Two models on the market. Gen 1 and Gen 2 listings can look similar. Check the model before you buy.

How it compares

Three close alternatives: the other two 1 kWh LiFePO4 units we review, and the small EcoFlow for households that only need electronics covered. Figures are from each maker's page.

Using it in a long outage

Refrigerator runtime, worked through

Read the yearly kWh figure on your refrigerator's EnergyGuide label and divide by 365. A fridge rated at 400 kWh a year averages about 1,100 Wh a day. Assume roughly 85% of the battery reaches the appliance after inverter losses (our planning assumption, not an Anker figure): 1,056 Wh × 0.85 is about 900 Wh, or around 19 to 20 hours for that fridge. With the expansion battery, the same math gives about 1,800 Wh, close to 40 hours.

Cycling the fridge stretches that further. The FDA says a closed refrigerator keeps food safe for about 4 hours. Run it for an hour or two, unplug it while the door stays shut, and check the temperature with an appliance thermometer. The safe line is 40°F or below.

Storage between outages

Anker's own guidance is to turn off all outputs when the unit is not in use, store it dry and cool, check the charge regularly, recharge to 100% if it drops below 30%, and fully charge at least once every 3 months. Put a reminder in your phone so the battery is full when a storm warning arrives.

Solar in a long outage

1. 01Use panels in the 11 to 60 V range with an XT-60 connector, as Anker specifies. Anker names its 625, 531 and PS400 panel series as the best matches.
2. 02Put the panels in full sun and keep the station indoors, running the cable through a door or window gap.
3. 03Charge during the day while the fridge runs, so solar carries part of the load.
4. 04Save the battery overnight for the router, lights and phones.

To size your own appliance list before you buy, use the backup power calculator on our sister site.