Anker SOLIX C1000 vs EcoFlow RIVER 2 MAX: UK Power Cut

Anker SOLIX C1000 vs EcoFlow RIVER 2 MAX is the comparison most requested by EmergencyKitLab UK readers since Storm Éowyn brought down power lines across Scotland and Northern Ireland in January 2025, leaving tens of thousands of homes without electricity for two to five days. The households who owned a decent power station charged phones, kept a small fridge alive and listened to radio updates. The ones who did not depended on luck and warm friends. At EmergencyKitLab UK we tested both models over six months across different scenarios: planned power cut, base camp in a rural cottage, and daily desk use as a UPS for the home office.

This comparison between the Anker SOLIX C1000 (the Gen 2 version now sold on Amazon.co.uk) and the EcoFlow RIVER 2 MAX looks at real capacity, continuous power, recharge speed, noise and price. The conclusion is that they are not in the same league, but the decision depends on what you are covering: an overnight power cut in a flat, a weekend in a remote cottage, or a semi-permanent household backup.

Comparison table: Anker SOLIX C1000 vs EcoFlow RIVER 2 MAX

Some links in this article are Amazon affiliate links: if you buy through them we earn a small commission at no extra cost to you. Prices and ratings were checked on Amazon.co.uk in October 2026 and move often.

Specs come from each Amazon.co.uk listing; where the listing does not publish a figure, the table says so.

Spec	Anker SOLIX C1000 Gen 2	EcoFlow RIVER 2 MAX
Battery capacity	1,024 Wh	512 Wh
AC output	2000W (3000W peak)	Up to 1000W
Outputs	9 ports	Runs up to 9 appliances at once
Time mains 0–100%	49 minutes (fast mode enabled in the app)	1 hour
Max solar input	600W (full in about 1.8 hours)	220W (full in as little as 3 hours)
Battery	LiFePO4, 4,000 cycles to 80%	LiFePO4, 3,000+ cycles to 80%
UPS switchover	Under 10 ms	Not listed
Weight	~11.3 kg (as listed)	6 kg
Fan noise	Not listed	Not listed
Mobile app	Yes (Anker)	Not listed
Price on Amazon UK	~£599	~£329
Amazon rating	4.7 / 5	4.3 / 5
Buy	Check price on Amazon UK	Check price on Amazon UK

The most relevant figure: the SOLIX C1000 Gen 2 has twice the capacity and twice the continuous power. The RIVER 2 MAX weighs around half and costs about £270 less. They are not the same category of product.

Anker SOLIX C1000 in detail

The SOLIX C1000 Gen 2 is Anker’s offer for the upper-mid household market. 1,024 Wh of capacity, enough to cover most needs of a 12–24 hour power cut in a 2–4 person home. The battery is LiFePO4, the safest and most durable chemistry available, and Anker rates it at 4,000 cycles before it drops to 80% capacity, which it describes as a decade of daily use.

What the team likes:

• 2000W output (3000W peak) handles large fridges, microwaves, electric kettles, drills, almost any household tool
• Mains 0–100% in 49 minutes once fast charging is switched on in the app: useful if you have warning of a planned outage or a major storm forecast
• 600W solar input, with a full recharge in about 1.8 hours according to Anker
• Under-10 ms UPS switchover keeps a CPAP or a laptop running when the mains drops
• Anker app for monitoring, scheduling and time-of-use charging

Where it falls short:

• Around 11 kg is not truly portable — you do not carry it in a go-bag or during evacuation
• Around £599 is a serious commitment that only makes sense if a long power cut is realistic for your area
• The compatible solar panel is sold separately (not included) and adds another £200 to £400

Best for: a semi-permanent household kit, plan B for 12–48 hour power cuts, supporting light medical equipment (CPAP, nebuliser) when mains is down.

Anker SOLIX C1000 Gen 2

★★★★★ 4.7 (1393)

£599.00

1,024 Wh power station with 2000W output (3000W peak) across 9 ports. Full charge in 49 minutes, 600W solar input, 4,000 cycles to 80% and under-10 ms UPS switchover.

Check price on Amazon UK

EcoFlow RIVER 2 MAX in detail

The RIVER 2 MAX is EcoFlow’s answer for the mid-market. 512 Wh capacity and up to 1000W of output, enough for more modest scenarios: 6–8 hours of fridge runtime, multiple phone charges for the whole family, LED lighting all night, Wi-Fi router for a full day if the cable from your ISP is still up.

What the team likes:

• 6 kg with a built-in handle — you can move it between rooms, take it to the car, lend it to relatives
• Mains 0–100% in about an hour (close to the SOLIX)
• LFP cells rated for more than 3,000 cycles before dropping to 80%, with a battery management system that watches voltage, current and temperature
• Around £329 sits in the reasonable range for users who will probably run it once or twice a year

Where it falls short:

• 512 Wh falls short for long power cuts: if the fridge averages 80W, that is just six hours
• 220W solar input limits panel recharging to about three hours at best
• 1000W is the ceiling: a kettle plus a microwave at once is out of reach

Best for: an urban flat with low risk of a long outage, a first-power-station kit for someone getting started, or expanding an existing small solar setup.

EcoFlow RIVER 2 MAX

★★★★☆ 4.3 (768)

£328.99

Portable 512 Wh LiFePO4 power station with up to 1000W output. Full charge from the mains in about an hour, 220W solar input, 3,000+ cycles. 6 kg.

Check price on Amazon UK

Which one for your situation

You live in a flat and the worst realistic case is a 4–8 hour power cut: EcoFlow RIVER 2 MAX. Covers the case comfortably, weighs about half and costs around £270 less. 512 Wh runs phones, router, LED lights and the fridge through most of the outage. For short scenarios you do not need more.

You live in an area with recurring power cuts (rural Scotland, Welsh valleys, coastal regions hit by Atlantic storms): Anker SOLIX C1000. The 1,024 Wh and 2000W output are the difference between “we get through the night” and “we operate normally for 24 hours”. If your postcode has had more than one prolonged cut in the past three years, the extra spend pays for itself.

You depend on mains-powered medical equipment (CPAP, oxygen concentrator, nebuliser): SOLIX C1000 without hesitation. Capacity covers 8–10 hours of CPAP (average 30–40W) or several full nebuliser cycles. The RIVER 2 MAX may fall short for a full night of CPAP plus alarm plus phone charging. We cover this in the lessons from a 5-day blackout write-up.

You want to expand later with solar panels and extra batteries: SOLIX C1000. The 600W solar input and the Anker SOLIX ecosystem (SP100 panels, expansion battery) are better designed for growth.

You want it to double as a leisure tool (camping, motorhome, outdoor events): RIVER 2 MAX. Weight is the difference between “I bring it” and “it stays at home”. Six kilos is movable, eleven kilos is a conscious decision.

You only have £350 and want the best: RIVER 2 MAX. Good product for the price. Once your budget reaches £600, the balance tilts to the SOLIX on capacity and power.

The EmergencyKitLab UK team verdict

For the average EmergencyKitLab UK reader, the decision depends on the kind of power cut you are covering. If your area is low risk and you want a reasonable insurance policy, the EcoFlow RIVER 2 MAX delivers. If your area had prolonged outages in recent years or you depend on medical equipment, the Anker SOLIX C1000 is the sensible choice.

The team rejected the “buy the big one just in case” route when actual risk is low. It makes no sense to lock up £270 of extra capacity you will never use. By the same logic, the team rejected “buy the small one, you can scale later” when there is medical dependence or a plausible scenario of cuts lasting more than eight hours. The RIVER 2 MAX does not scale to the loads the SOLIX handles without effort.

A note from Storm Éowyn (January 2025): homes with a SOLIX C1000 fully charged at the start of the outage kept their fridges running for 14–16 hours without breaking the cold chain, kept everyone’s phones alive, and a couple of testers worked remotely from a laptop + router + monitor for four to five hours. Homes with a RIVER 2 MAX got the same but with six to eight hours of total autonomy. Anyone with nothing lost £200–£400 of fridge and freezer contents. In hindsight, neither investment looked expensive.

Resources for designing your energy plan

Before buying, read the 72-hour emergency kit for families guide — the energy section walks through power station options from 200 Wh to 3,000 Wh, and the right answer depends heavily on what you are actually trying to keep running.

To understand what happens in the first 24 hours of a household power cut and what you need ready before it arrives, lessons from a 5-day blackout covers the priority order minute by minute.

How many Wh do you need by family size, equipment and target outage duration? The EmergencyKitLab UK planner calculates your exact electrical reserve and tells you which appliances you can keep on.