Head-to-head test
EcoFlow RIVER 2 vs Anker SOLIX C1000 Gen 2
The RIVER 2 can't be bought any more, and the SOLIX C1000 Gen 2 isn't its replacement: it's four times the battery at more than three times the weight, so the question isn't which to buy but whether you ever wanted a station this size.
Full profiles: EcoFlow RIVER 2 → · Anker SOLIX C1000 Gen 2 →
Written by Wenny ZhengUpdated
Portable Power Tester, Station Arena Test Desk
Spec deltas
EcoFlow's store no longer lists the RIVER 2, so only one of these two boxes has a price on this page. That settles the recommendation before a single spec is read: the Anker SOLIX C1000 Gen 2 is the unit you can buy, and it's a good one. It settles much less than it sounds like, because these two were never really competing for the same buyer.
Look at the distance. 1,024Wh against 256Wh, 2,000W of continuous output against 300W, 24.9 lb against 7.8 lb. After the flat 85% derate this site applies to every unit, that's 870Wh of usable energy against 218Wh, which is the difference between finishing a 320Wh CPAP night with 550Wh in hand and stopping 102Wh short of the alarm. One of these is a station. The other is a box you pick up with one hand.
So the page has two readers and two answers. If you need a station, take the C1000 Gen 2 and stop reading. If you came looking for the small one, EcoFlow still sells that shape: the RIVER 2 240 is the same box carrying a slightly smaller battery, and no amount of Anker capacity is an answer to a job that fits inside 100Wh.
What the Numbers Reveal
Each conclusion stated first — the numbers behind it on one line, the full analysis below.
weight
Its answer to that shortfall is weight, 7.8 lb against 24.9 lb, a one-hand lift against a two-hand one. But the CPAP night is the one scenario where the unit never moves. It sits on a nightstand from lights-out to alarm, so the small box spends its only real advantage in the one room where nobody carries anything.
RIVER 2: 256Wh rated, 218Wh usable after the flat 85% derateCPAP Overnight needs 320Wh; the RIVER 2 comes up 102Wh short, about 68% of the night coveredSOLIX C1000 Gen 2: 870Wh usable, finishes the same night with 550Wh to spareRIVER 2: 7.8 lb. SOLIX C1000 Gen 2: 24.9 lb
Why it mattersIf a CPAP is why you're shopping, the small box was never the answer, retired or not. Take the C1000 Gen 2.
continuous output
A compressor draws a fixed number of watts at switch-on, not a multiple of whatever it's plugged into, so the number deciding what starts is the ceiling, 3,000W against 600W. The failure mode is the unpleasant kind, too. A unit that refuses a load tells you straight away. One that starts it and drops it tells you after you've unpacked the cooler, and the C1000 Gen 2 takes that whole 670Wh evening with 200Wh still in hand.
RIVER 2: 300W continuous, 600W surge, a 2x ratioSOLIX C1000 Gen 2: 2,000W continuous, 3,000W surge, 1.5xTailgate Party peaks at 400W and needs 670Wh; the RIVER 2 starts the peak but can't sustain it
Why it mattersAnyone whose list includes a compressor, a cooler, a small fridge, a blender in a parking lot, is outside the RIVER 2's class before capacity is even the argument.
solar input
That matters because neither unit rides out an eight-hour outage on one charge, 53% covered against 13%, so the spec that actually decides a blackout is how fast you put energy back between stretches. The C1000 Gen 2 refills from the wall in roughly 49 minutesB1 and from a full 600W of sun in under two hours. The RIVER 2 takes longer than that to replace a quarter as much.
RIVER 2: 110W maximum solar input against 256Wh of batterySOLIX C1000 Gen 2: 600W maximum solar input against 1,024Wh8-Hour Blackout needs 1,645Wh: the RIVER 2 covers about 13%, the C1000 Gen 2 about 53%Reviewers clock a full AC recharge on the C1000 Gen 2 at roughly 49 minutesB1
Why it mattersFor outage prep the small box isn't a scaled-down version of the same plan. It holds a quarter as much and is slower to put it back, which is two losses on one spec sheet.
The specific dimensions that decide these two units — everything else is a tie.
Your Life, Your Pick
Selected because: Four of the seven rows say neither unit finishes the job, so the useful information is exactly where the line falls: at 320Wh, and again at 910Wh.
Four of the seven rows say neither unit finishes, which sounds useless until you notice where the line falls. 100Wh across an afternoon: both, easily. A 320Wh CPAP night: the Anker only. 670Wh of tailgate: the Anker only, with 200Wh left over. A 910Wh remote workday: the Anker misses by 40Wh, which is one phone top-up or knocking off twenty minutes early. Above that, the 1,645Wh outage, the 2,100Wh camping weekend, the 4,685Wh van day, you're reading the wrong page and want a larger station.
Read down that list and the RIVER 2 clears exactly one row. That isn't a knock on it, because 256Wh was never sold as a blackout plan. It does mean the overlap between these two units is one scenario wide, and everything above an afternoon of phones belongs to the Anker or to something bigger than both.
Portability & Form Factor
Selected because: 7.8 lb against 24.9 lb is the one axis the retired unit still wins outright, and it's the axis most people were shopping on when they found this page.
weight
24.9 lb is the admission price for 1,024Wh, and it's a real price. That's a two-hands, set-it-down-before-you-open-the-tailgate carry, the kind of weight you move once at the campsite and then leave exactly where it landed. The RIVER 2 at 7.8 lb travels in the same hand as a water bottle and goes out to the picnic table without a plan.
This is the one axis where the retired unit still wins outright, and it's worth being blunt that it's the axis most people were shopping on when they landed here. If what you wanted was the thing you carry in one hand, the Anker is not that, and capacity doesn't turn it into that.
What the Specs Don't Tell You
Selected because: Surge ceiling, UPS transfer class and one missing noise figure decide what you can plug in and where you're willing to put it.
rated cycles
Three specs decide what you can plug in and where you'll tolerate it. The surge ceiling, 3,000W against 600W, which is the difference between starting a motor and hoping. The UPS class, rated at 10ms or better against 30ms or better, both of them ratings rather than stopwatch results, with the longer one sitting on the wrong side of what many desktops will ride through. And noise, where the RIVER 2 publishes no figure at all.
That last one cuts back at my own pick, so here it is first. The Anker's published 35dB is the quiet end of its range: under about 200W it's near-silent, but the fans ramp audibly during fast charging or heavy output, to around 55dB at 1,000W-plusB2. If it's going to live in a bedroom, the number on the box is the sound of it doing almost nothing. The RIVER 2 has no published figure to hold it to, and the coverage that does exist calls it noticeably louder under load than the newer RIVER 3A1.
Brand Trust
Selected because: One of these units has left its maker's range, which turns out-of-warranty policy from a footnote into the main question.
A discontinued unit turns support policy from a footnote into the main question. EcoFlow's published position is that it offers no parts and no service once a unit is out of warranty, which is fine on a current model and heavier on one that has left the range. What softens it is the surroundings: EcoFlow runs the deepest ecosystem in portable power, a dozen-plus models across the DELTA and RIVER lines, and the largest community in the space, which is where practical answers about older units actually live.
Anker's story runs the other way. The parent brand's history of no-hassle replacements is why a lot of people shortlist SOLIX at all, and SOLIX support is the part of that history under the most strain: AI-first answers to specific questions, and awkward return logistics on anything heavy enough to ship as hazmat. Firmware updates have also removed features without notice. None of that changes the pick. It's just worth knowing before you assume the name on the box is doing more work than it is.
Strengths & trade-offs
EcoFlow RIVER 2
Strengths
- +Lighter by 17.1 lb
Trade-offs
- –Weaker inverter (-1,700W) limits appliance compatibility.
- –Sealed capacity — the SOLIX C1000 Gen 2 can add batteries to grow past 256Wh; this one can't.
- –Shorter-lived battery — rated for 3,000 charge cycles vs the SOLIX C1000 Gen 2's 4,000, so it wears out sooner.
Anker SOLIX C1000 Gen 2
Strengths
- +Larger battery capacity
- +Higher AC output
- +Faster solar charging
- +Rated for 4,000 charge cycles — much longer battery lifespan
Trade-offs
- –Significantly heavier (+17.1 lbs), making it harder to move.
Will It Power Your Gear?
Scenario math and per-appliance runtimes, modeled from the spec record.
Scenario verdicts
We ran the math on seven real-world scenarios. Here's which unit survives your actual life.
SCN-01 · 2 nights · needs 2,100Wh
Weekend Camping
Two nights off-grid with essential comfort
Neither unit
Neither unit covers this scenario's 2,100Wh: the RIVER 2 comes up 1,882Wh short (about 10% covered), the SOLIX C1000 Gen 2 1,230Wh (41%). This is well outside what either unit is for; the right answer here is a larger station, not a choice between these two.
Battery budget usedlower = more headroom
LOAD Phone Charger 15W×6h · LED Lights 40W×8h · Box Fan 75W×14h · CPAP Machine 40W×16h
SCN-02 · 8 hours · needs 1,645Wh
8-Hour Blackout
Keep the essentials running through a night without power
Neither unit
Eight hours of a working house is 1,645Wh, and neither box is a plan for it: the C1000 Gen 2 covers about 53%, the RIVER 2 about 13%. What separates them is what happens next. The Anker takes 600W of solar input, so one sunny stretch puts a real fraction back before the next night. The RIVER 2 tops out at 110W, which makes it a way to keep phones and a router alive rather than a way to keep the house going.
Battery budget usedlower = more headroom
LOAD Fridge 150W×8h · Router + Modem 20W×8h · LED Lights (4 bulbs) 40W×6h · Phone Charger 15W×3h
SCN-03 · 8 hours · needs 320Wh
CPAP Overnight
Sleep therapy without interruption — the #1 medical use case
SOLIX C1000 Gen 2
The number is 320Wh and only one of these boxes has it. The RIVER 2 gets about two thirds of the way, 218Wh usable against a 320Wh night, quitting 102Wh short, which in practice means somewhere in the small hours. The C1000 Gen 2 finishes with 550Wh untouched, which is the entire point of buying for this job: you want to sleep through it, not do arithmetic about it.
Battery budget usedlower = more headroom
LOAD CPAP Machine 40W×8h
SCN-04 · 8 hours · needs 910Wh
Remote Workday
Full work day off-grid without power anxiety
Neither unit
Neither finishes a 910Wh day, but these are not the same kind of miss. The C1000 Gen 2 lands 40Wh short, one phone top-up or twenty minutes off the end of the day. The RIVER 2's 218Wh usable covers under a quarter of it. Treat the Anker as a day that ends slightly early and the RIVER 2 as a morning.
Battery budget usedlower = more headroom
LOAD Laptop 60W×8h · External Monitor 30W×8h · Router + Modem 20W×8h · Phone Charger 15W×2h
SCN-05 · 4 hours · needs 670Wh
Tailgate Party
Game day power for the crew
SOLIX C1000 Gen 2
The RIVER 2 gets the 400W peak moving and then can't keep it there: 600W of surge starts it, 300W of continuous is what it has to run it on. That's the failure that costs you the afternoon, because it arrives after everything is already set up. The C1000 Gen 2 takes the full 670Wh evening and hands back 200Wh.
Battery budget usedlower = more headroom
LOAD Blender 400W×0.5h · LED TV (55") 80W×4h · Bluetooth Speaker 15W×4h · Phone Charger (×3) 45W×2h
SCN-06 · 24 hours · needs 4,685Wh
Van Life Daily
A full day of mobile living — the ultimate endurance test
Neither unit
Neither unit covers this scenario's 4,685Wh: the RIVER 2 comes up 4,467Wh short (about 5% covered), the SOLIX C1000 Gen 2 3,815Wh (19%). This is well outside what either unit is for; the right answer here is a larger station, not a choice between these two.
Battery budget usedlower = more headroom
LOAD Mini-Fridge 150W×24h · Laptop 60W×4h · Phone Charger 15W×3h · LED Lights 40W×5h · Fan 75W×8h
SCN-07 · an afternoon · needs 100Wh
Afternoon Off-Grid
Phones and a speaker at the park, beach, or campsite — the small-unit job description
Either unit
Both cover this without effort. 100Wh of phones and a speaker across an afternoon leaves the RIVER 2 at 46% used, 118Wh of its usable 218Wh still in the tank, and the C1000 Gen 2 at 11%. This is the row the small box was built for, and the honest reading is that the Anker's capacity is ballast here rather than headroom: 24.9 lb to do a job 7.8 lb finishes with half a tank spare. If this is the whole of your use case, the live version of this answer is the RIVER 2 240, not a station.
Battery budget usedlower = more headroom
LOAD Phone Charger (×2) 30W×2h · Bluetooth Speaker 10W×4h
The Load Test
RUNTIME = (Wh × 0.85) ÷ LOAD
None of the scenarios above exactly yours? Build it. Toggle what you'd plug in; both units are tested against the combined draw.
Essentials
Comfort & Convenience
High-Draw Appliances
Test duration
8h
Continuous draw
205W
Projected runtime
For this load: SOLIX C1000 Gen 2 runs 4.2h vs 1.1h.
$529.99 list · direct from Anker
Planning for more than this? Describe your whole setup and get it sized →
Modeled from the spec record — same math as the tables below. Methodology
Runtime by appliance
Real-world runtime estimates for common appliances, modeled at 85% inverter efficiency.¹
Essentials
The basics you need runningscale 0–58hComfort & Convenience
Makes off-grid life actually enjoyablescale 0–11.6hHigh-Draw Appliances
These reveal the real limitsscale 0–0.9h¹ Runtime = (capacity × 0.85) ÷ appliance watts. Within each group, all bars share one time scale (the group's longest runtime), so lengths are comparable across appliances; identical runtimes collapse into a single blue/orange bar. Actual runtime varies with battery age, temperature, and simultaneous loads — see methodology.
Conclusion
September 19, 2026
Verdict: the SOLIX C1000 Gen 2, on Power Score margin
The SOLIX C1000 Gen 2 wins because it's the only unit here you can still buy, and because it would have taken the station-sized work anyway: 870Wh usable against the RIVER 2's 218Wh, a 3,000W surge ceiling against 600W, six AC outlets against two, and a transfer rated at 10ms or better against 30ms. At $530 it finishes a 320Wh CPAP night with 550Wh spare and a 670Wh tailgate with 200Wh left, neither of which the RIVER 2 completes. Read the win narrowly, though. The RIVER 2 lost this page by leaving EcoFlow's catalogue, not by being outclassed at its own job, and 100Wh across an afternoon still only uses 46% of it. If that's the job, the live answer is EcoFlow's RIVER 2 240, not 24.9 lb of Anker.
Today the SOLIX C1000 Gen 2 is $499.99, $30 under its typical $529.99. The verdict weighs typical prices, not today's. Prices checked 28 days ago.
Editor-assigned confidence, based on cited owner research and spec analysis.
List prices as of September 19, 2026. The links below open Anker's current price.
$499.99 · direct from Anker
down from $530 · 6% below usual
Last checked 28 days ago. Prices move — check before you buy.
Written by Wenny Zheng, Portable Power Tester · Station Arena Test Desk · Updated September 19, 2026
Black Friday · 26 days out
Price to beat:SOLIX C1000 Gen 2 $450
The lowest we have recorded. A Black Friday price above it is a sale this unit has already had.
Measured Data
Benchmark scores and the full spec record, side by side.
Benchmark scores
Not rated for both units (minimum threshold unmet): UPS, RV Living, Home Backup, Solar Generator, Food Truck.
Full specifications
ᵈ Derived: price ÷ rated capacity. See the data behind our comparisons →
Comparison ToolAdd more power stations, side by sideOpen Tool →How these numbers are produced
Numeric verification
Every figure on this page traces to our spec database or arithmetic on it — no estimated numbers.
Owner claims
Statements about owner experience are cited to published reviews — see Sources & Research Notes below.
Runtime model
Runtime = (rated capacity × 0.85 inverter efficiency) ÷ device wattage. Solar recharge estimates assume panels deliver 70% of rated output. Cold weather, battery age, and stacked loads reduce real-world results.
Power Score
Computed from 14 published spec dimensions, weighted per use-case bench. Higher is better; a unit must meet a bench's minimum threshold to be rated.
See the full weight table and data sourcing on our methodology page →Class ranking (the star rating)
Each unit's star score is a category ranking, not customer reviews — no buyer opinions feed it. We score every station on size-independent quality (value, output, portability, endurance, ports, warranty, and more), then percentile-rank it against the other units in its capacity class, so a class-leading compact unit and a class-leading whole-home unit can both earn 5★. Here, RIVER 2 rates 3.9/5 (38th percentile of 25 Personal-class units), and SOLIX C1000 Gen 2 rates 4.9/5 (96th percentile of 27 Everyday-class units).
How the class ranking is computed →Test Notes & Caveats
Hidden gotchas and advantages we spotted that you won't find on the product page.
RIVER 2: Fixed Capacity
The RIVER 2 is sealed at 256Wh — fine if that covers you, but it's the ceiling. By contrast the SOLIX C1000 Gen 2 can add expansion batteries, though the first thing it has over the RIVER 2 is its own 1,024Wh base — expansion is the step after that, for the buyer who would outgrow 1,024Wh as well.
Surge: The Ratio Flatters the Small Unit
The RIVER 2 keeps twice its continuous rating in reserve, 600W over 300W, while the C1000 Gen 2 keeps only half again, 3,000W over 2,000W. That makes the small unit look like the more generous inverter. It isn't, because a motor draws a fixed number of watts when it starts, not a multiple of the rating it happens to be plugged into. On raw starting ability this is 3,000W against 600W. The ratio is telling you something real but different: the RIVER 2 spends its working life further below its own ceiling.
UPS Switchover: ≤10ms vs ≤30ms
Both list a UPS mode, at different rated speeds. The SOLIX C1000 Gen 2 is rated ≤10ms — quick enough on paper that desktop PCs and routers should ride through, treating that as the rating it is. The RIVER 2 is rated ≤30ms — a transfer this long is one many desktops will NOT ride through, so plan on reboots for sensitive gear. If a computer with unsaved work is the thing being protected, the stated class is worth the attention; nothing here is a lab result.
Warranty: Same Five Years, Different Meaning
Both records carry a 5-year term, so coverage isn't a tiebreaker on terms. What differs is what the term is attached to. The SOLIX C1000 Gen 2's five years start the day you buy it. The RIVER 2's only apply to a unit already in someone's hands, bought recently enough that the clock is still running, and EcoFlow offers no parts and no service once a unit is out of warranty. On a model that has left the range, that's the sentence to weigh.
Battery Lifespan in Real Years
The SOLIX C1000 Gen 2 is rated for 4,000 cycles vs 3,000. In real life: at daily use, that's 11 vs 8.2 years. At weekend use (twice a week), it's 38 vs 29 years. One caution reading years across different sizes: a cycle is 1,024Wh on the SOLIX C1000 Gen 2 and 256Wh on the RIVER 2, so count lifetime energy — roughly 4,096 kWh against 768 kWh over the rated life. After hitting the cycle limit, the battery doesn't die — it drops to ~80% of original capacity, which is still very usable.
One Published Noise Figure, and It's the Quiet End
The C1000 Gen 2 publishes 35dB and the RIVER 2 publishes nothing, which is a smaller gap than it looks. A figure like this is a spec-sheet number from the quiet end of a unit's range, not a measurement of it working hard, so read it as what the Anker sounds like idling rather than what it sounds like refilling. The RIVER 2's blank isn't evidence it's louder. It means there's no number to hold it to, and no way to compare the two here without hearing them.
Full record above — the Test Desk pick is the SOLIX C1000 Gen 2.
Check SOLIX C1000 Gen 2 price →Ownership Analysis
What happens after you buy — true cost of ownership, brand trust, and growth potential.
Lifetime value
Service lifeyears at one full cycle per day
Lifetime energy delivered
Cost per delivered kWh
│ warranty ends · Reaching the cycle rating means ~80% capacity remains — degraded, not dead.
Analyst note
The RIVER 2 is no longer sold, so there is no price to work its cost per kWh from, and this comparison doesn't quote one. On what you can actually buy today, the SOLIX C1000 Gen 2 works out at $0.13/kWh over its rated life. If you already own the RIVER 2, the hardware comparison still holds: over its rated life the RIVER 2 delivers about 768 kWh and the SOLIX C1000 Gen 2 about 4,096 kWh.
Brand trust
EcoFlow
Ecosystem
Largest in portable power — 12-15 models across DELTA Pro, DELTA 3, and RIVER 3 series, plus solar panels and smart home panels
Support
US phone, email and chat support with genuinely split outcomes: prepaid-label replacements that go through without a fight, alongside claims that drag and come back as refurbished units. Buying through Costco or Amazon has been the reliable hedge, because their return windows don't care how the warranty conversation goes.
Community
Largest community in the space — Reddit r/Ecoflow_community (~31K members), multiple Facebook groups, and an official community forum
App experience
Rated 4.6/5 iOS (~8,400 ratings) · 4.2/5 Android (~17,000 ratings)
Unique strength
Fastest-charging technology (X-Stream), deepest product ecosystem, and most active innovation cadence. At the top of the range sit two whole-home paths: the TITAN line, one 5 kWh unit that grows to 30 kWh, and the DELTA Pro Ultra platform, which stacks batteries and inverters further — flagship paths, not line-wide features.
Worth knowing
EcoFlow offers no parts and no service once a unit is out of warranty. On a current model that's a policy. On a model that has left the range it's the thing to plan around. The counterweight is the surroundings: the deepest model range in portable power and the largest community in the space, which is where practical answers about older units end up living.
Anker
Ecosystem
7-8 SOLIX portable power stations across C-series (compact) and F-series (flagship), plus the X1 home energy system
Support
US-based support. Historically known for incredible no-hassle replacements, but recent reports describe AI-driven support agents giving generic responses and complex return logistics for heavy units (hazmat shipping). The Anker brand reputation is still strong, but SOLIX-specific support quality is trending down.
Community
Moderate — active Reddit (r/Anker, r/AnkerSOLIXCommunity) and growing. Benefits from Anker's massive consumer electronics brand awareness.
App experience
Rated 4.5/5 iOS (~1,100 ratings) · 4.3/5 Android
Unique strength
Parent brand trust from Anker's consumer electronics dominance. InfiniPower technology for long cycle life. Strong $/Wh value in the mid-size and larger units — the S2000, F2600 and C1000 are among the better buys per watt-hour in the catalog.
Worth knowing
Anker's consumer-electronics reputation is doing some of the selling here, and SOLIX support is the part of it under strain: AI-first answers to specific questions, and awkward return logistics on heavy units. Firmware updates have also removed features without notice. It doesn't change the pick. It just isn't the no-hassle Anker of a decade ago.
Analyst note
Two different kinds of trust. EcoFlow's is breadth, the widest range and the biggest community, which is exactly what you lean on when your unit is no longer in the catalogue. Anker's is the parent brand plus value per watt-hour at precisely this size of station, with the caveat that SOLIX-specific support has been sliding while the hardware has been getting better.
Growth path
RIVER 2
FIXED CAPACITYFixed at 256Wh, with no expansion — so size it for your needs up front rather than planning to add capacity later.
Accepts up to 110W of solar. Limited to a single portable panel.
Limited ports. You'll likely need a power strip or splitter.
SOLIX C1000 Gen 2
EXPANDABLESupports Anker expansion batteries, so you can add capacity later without replacing the base unit — useful if your needs may climb past 1,024Wh.
Accepts up to 600W of solar. Suitable for a 1-2 panel setup.
Adequate ports for most setups, but heavy users may want a power strip.
Expansion batteries are Anker-specific. You're investing in the Anker ecosystem.
Realistic full solar rechargeat 70% of rated panel output — see methodology
Analyst note
Growth only counts if you can still buy in, and the RIVER 2 is no longer sold (EcoFlow points owners to the RIVER 2 240). That leaves the SOLIX C1000 Gen 2: it starts at 1,024Wh and takes Anker expansion batteries, so the ceiling moves if your needs do. The RIVER 2's fixed 256Wh still matters if you already own one, but it isn't a reason to pick it over the SOLIX C1000 Gen 2.
What Owners Report
Patterns from published owner reports and long-term reviews — every claim cited to its source below.
EcoFlow RIVER 2
Field coverage on the RIVER 2 is thin and largely comparative, drawn from review write-ups rather than long-term owner forumsA0. What exists is consistent: it shares the RIVER 3's core platform, the same 300W output, LiFePO4 cells and roughly 60-minute fast charge, and it stayed a proven budget small-format unit right to the endA2.
The complaint is noise. It runs noticeably louder under load than the newer RIVER 3, and it lacks that unit's waterproofing and faster UPSA1A3. The honest summary in that coverage was that for strictly indoor use where every dollar counts it was still a reasonable boxA3, which describes exactly the reader who should be looking at what EcoFlow sells in its place rather than at 24.9 lb of Anker.
“Shares the same core platform as the RIVER 3 — 300W output, LiFePO4 chemistry, and roughly 60-minute fast charging — and remains a popular, proven budget small-format unit.”
Sources
backuppowerhub.com · ecoflow.com · versus.com
Anker SOLIX C1000 Gen 2
The C1000 Gen 2 is widely rated the mid-size unit to beat, described as a refined, fast-charging update to an already popular 1kWh platformB4. Two gains carry that: a full recharge in roughly 49 minutes, clearly quicker than the original C1000's 58 to 80B1, and a continuous output that crosses a useful threshold, enough to run a standard 1,500W space heater with headroom left overB3.
The complaint is the fans, and it's the most common one by a distanceB2. Under about 200W it sits near its published 35dB and you forget it's running. During fast charging or heavy output the fans climb to around 55dBB2. Hold both halves at once: the thing that refills it inside an hour is the same thing that makes it audible while it does.
“Fast HyperFlash charging — a full recharge in roughly 49 minutes, noticeably quicker than the original C1000's ~58-80 minutes.”
Sources
thepowerpick.com · macrumors.com · outdoorgearlab.com · technerdo.com · mensjournal.com · powerstationadvisor.com
Sources & Research Notes
Every owner claim in this report is traceable to a published source. The bracketed references above resolve here.
Recurring owner themes
- The RIVER 2 is the older, cheaper unit on the same core platform — reasonable for budget indoor use but louder and less refined than the RIVER 3. [RIVER 2 · 2 entries]
- Fast charging and higher output over the original are the standout gains; fan noise under load or fast charging is the top complaint. [SOLIX C1000 Gen 2 · 3 entries]
- A1
“The RIVER 2's spec data doesn't include a specific dB rating, and owner reports suggest it's noticeably louder under load than the newer RIVER 3.”
backuppowerhub.com — EcoFlow RIVER 2 vs RIVER 3 · 2026 · [negative]
- A2
“Shares the same core platform as the RIVER 3 — 300W output, LiFePO4 chemistry, and roughly 60-minute fast charging — and remains a popular, proven budget small-format unit.”
ecoflow.com / versus.com — RIVER 2 vs RIVER 3 · 2026 · [positive]
- A3
“For strictly indoor use where every dollar counts, the RIVER 2 is still a reasonable choice — but it lacks the RIVER 3's refinements like waterproofing, faster UPS, and quieter operation.”
backuppowerhub.com — RIVER 2 vs RIVER 3 recommendation · 2026 · [mixed]
- B1
“Fast HyperFlash charging — a full recharge in roughly 49 minutes, noticeably quicker than the original C1000's ~58-80 minutes.”
thepowerpick.com / macrumors.com — Anker SOLIX C1000 Gen 2 review · 2026 · [positive]
- B2
“Fan noise is the single most common complaint — nearly silent at low load (about 35 dB under 200W), but the fans ramp up audibly during fast charging or heavy output, reaching around 55 dB at 1,000W-plus.”
outdoorgearlab.com / technerdo.com — C1000 Gen 2 review · 2026 · [negative]
- B3
“The higher continuous output crosses a useful threshold over the original — enough to run a standard 1,500W space heater with headroom to spare.”
thepowerpick.com / mensjournal.com — C1000 Gen 2 review · 2026 · [positive]
- B4
“Reviewers describe it as a refined, powerful, fast-charging update to a popular 1kWh platform, widely rated the mid-size unit to beat in 2026.”
thepowerpick.com / powerstationadvisor.com — C1000 Gen 2 review · 2026 · [positive]
Research compiled September 19, 2026.
What Owners Actually Report
Drawn from 41 comments on independent review channels — not from retailer reviews, which skew to the first week of ownership. Each line is our summary of one commenter's claim, linked to the original. We record what they said, including where it contradicts the spec sheet.
EcoFlow RIVER 2
37 claims from 27 comments · 30 from owners · 11 with figures
- Runtime
- 10 · 38% negative
- Price & value
- 5 · 20% negative
- Solar input
- 3 · 3% negative
- App & firmware
- 3 · 39% negative
- Durability
- 2 · 100% negative
What owners complain about
Used as a DC UPS it averaged well over 10W to deliver 5W to a cable modem.
Idle drainmeasuredowner6 agreedsource →
Display reads 0W output until roughly 15W is drawn; a 2W night light shows nothing.
App & firmwaremeasuredowner2 agreedsource →
His River 2 and Glacier both died blinking and non-functional just after warranty expired.
Durabilityowner4 agreedsource →
What owners praise
RIVER 2 pulled 120W from a 100W third-party panel over four days in a van.
Solar inputmeasuredowner15 agreedsource →
Ran router, PoE switch, NAS, modem and a NUC through two outages, cameras up about 2 hours.
Runtimemeasuredowner4 agreedsource →
River 2 plus a 100W panel is exactly the emergency-only setup he wanted and works great.
Price & valueowner31 agreedsource →
Anker SOLIX C1000 Gen 2
22 claims from 14 comments · 18 from owners · 6 with figures
- Price & value
- 4 · 0% negative
- Runtime
- 3 · 15% negative
- UPS switchover
- 2 · 0% negative
- Inverter & surge
- 1 · 0% negative
- Solar input
- 1 · 0% negative
What owners complain about
Gen 2 loses the gen 1's ability to add an expansion battery.
Expandability23 agreedsource →
Same app failure as his other brands: paired devices go missing on later launches.
App & firmwareowner2 agreedsource →
Can only pull 100W from the C1000 Gen 2's 12V ports and cannot confirm how XT60i sensing works.
Otherownersource →
What owners praise
Two units keep his gas furnace, three fridge/freezers and network alive for 5+ hours.
Runtimemeasuredowner15 agreedsource →
Anker 1000 gen 2's edge is a 2000W inverter, also at 25 pounds.
Inverter & surgemeasuredowner8 agreedsource →
Got the C1000 gen 2 on sale for $379 plus a $219 200W panel.
Price & valuemeasuredowner6 agreedsource →
Claims are weighted by how specific they are, whether the commenter owns the unit, and how many readers agreed. Comments that mention a product under a rival's review count for more, because the commenter had no reason to be there. This is what buyers report, not our test results — for measurements we ran ourselves, see the methodology.
Who Should Buy Which
Buy the RIVER 2 if you…
- →You already own one and your week is phones, a laptop and a speaker. 100Wh across an afternoon leaves it at 46% used, with 118Wh of its usable 218Wh still in the tank, and nothing on this page is a reason to replace a unit still doing its job.
- →You're weighing leftover retailer stock and want the shape of what you'd be getting: 7.8 lb, 218Wh usable, two AC outlets, 60W of USB-C, and a 300W ceiling that stops 102Wh short of a CPAP night and won't hold a 400W load.
- →You own one and are asking whether the Anker is the upgrade. The test is 218Wh usable, not the catalogue: if your afternoons still land under it, the box you want next is the same size, not four times the size.
Buy the SOLIX C1000 Gen 2 if you…
- →A CPAP is why you're shopping. 320Wh a night against 870Wh usable, finished with 550Wh spare, and it's the only unit here that finishes at all.
- →You want one box covering a tailgate, a work-from-anywhere day and the opening hours of an outage: 670Wh with 200Wh left, 910Wh missed by only 40Wh, and 53% of a 1,645Wh blackout.
- →You run tools or appliances that spike at switch-on. 3,000W of surge over 2,000W continuous is the real gap between these two, and it's a bigger one than capacity.
- →You want room to grow, or just more ports. It takes Anker expansion batteries, which at this size buys longer runtimes on the same loads rather than a path to backing up a house, and it lands with six AC outlets and 140W of USB-C against the RIVER 2's two and 60W.
If neither fits
Two different people should close this page. If what you wanted was the small box, the one you carry in one hand for an afternoon of phones and a speaker, the C1000 Gen 2 is not that answer scaled up. It's 24.9 lb of capacity you won't touch, and EcoFlow's own replacement for the RIVER 2 is the RIVER 2 240, the same unit carrying a slightly smaller battery. And if your list looks like the 1,645Wh outage, the 2,100Wh camping weekend or the 4,685Wh van day, neither of these covers it. The Anker gets 53%, 41% and 19% of the way, and what you're shopping for is a larger station, not a choice between these two.
The Bottom Line
The SOLIX C1000 Gen 2 is the recommendation because it's the only unit here you can buy, and because it would have taken the station-sized work regardless: 870Wh usable against 218Wh, a 3,000W surge ceiling against 600W, and the only one of the two that finishes a CPAP night. The RIVER 2 clears exactly one row of the scenario table, the 100Wh afternoon, and it clears that at 46% used.
Just don't let the live one winning turn into buy the big one. If you came here for a station, take the Anker and go. If you came here for the box you carry in one hand, the Anker isn't a larger version of that, it's a different product, and the thing that actually replaces the RIVER 2 is EcoFlow's RIVER 2 240.
Frequently Asked Questions
Answers drawn from the spec record and cited owner research.
Is the EcoFlow RIVER 2 discontinued?
Yes. EcoFlow's store no longer lists it, which is why this page shows no price and no buy button for it. What EcoFlow sells in its place is the RIVER 2 240, the same unit with a slightly smaller battery. Retailer stock may still turn up, and the RIVER 2's specs on this page stay accurate for anyone who owns one.
Can the EcoFlow RIVER 2 run a CPAP all night?
Not on our overnight scenario. That night draws 320Wh and the RIVER 2 has 218Wh usable once the flat 85% derate is applied, so it stops 102Wh short, roughly two thirds of the way to the alarm. The SOLIX C1000 Gen 2 finishes the same night with 550Wh still in hand.
Is the Anker SOLIX C1000 Gen 2 quiet enough for a bedroom?
At low load, yes. Its published 35dB is about what it does under 200W, and at that level it's near-silent. Fast charging is the other story: the fans climb to around 55dB at 1,000W-plus, so top it up before bed rather than beside it. The RIVER 2 publishes no noise figure at all, and what coverage exists calls it noticeably louder under load than the newer RIVER 3.
Should I upgrade from a RIVER 2 to the SOLIX C1000 Gen 2?
Only if your loads outgrew the small box, not because the RIVER 2 left the catalogue. The test is 218Wh usable: if a 100Wh afternoon still uses 46% of it, your RIVER 2 is fine and the Anker is 24.9 lb of capacity you'd be storing. If you've started missing CPAP nights or stalling 400W loads, the C1000 Gen 2 is the fix, and it's the only live unit on this page.
Why does the RIVER 2 show a higher surge ratio but lose on starting power?
Because the ratio and the ceiling measure different things. The RIVER 2 keeps 600W of surge above a 300W rating, twice its own headroom, while the C1000 Gen 2 keeps 3,000W above 2,000W, only half again. A compressor draws a fixed number of watts at switch-on, not a multiple of anyone's rating, so 3,000W against 600W is what decides whether it starts. On the tailgate scenario the RIVER 2 gets a 400W peak moving and then can't hold it.
Where to buy
EcoFlow RIVER 2
Left EcoFlow's store
Anker SOLIX C1000 Gen 2Pick
$499.99
$499.99 · direct from Anker
down from $530 · 6% below usual
Last checked 28 days ago. Prices move — check before you buy.
Prices may vary by retailer and are subject to change.