Head-to-head test
EcoFlow RIVER 2 vs Anker SOLIX C300X
The RIVER 2 is $81 cheaper and cheaper to own, but it's the loud one, 50dB under load against the C300X's near-silent 25, with a 60W USB-C port and a 30ms switchover, and for the indoor, bedside, laptop use these small units actually get, quiet and charging speed carry the day.
Written by Wenny ZhengUpdated
Portable Power Tester, Station Arena Test Desk
EcoFlow
RIVER 2
1,499Power Score · Device Hub
$209.00 · direct from EcoFlow
Last checked 8 days ago. Prices move — check before you buy.
Anker
SOLIX C300X
1,638Power Score · Device Hub
$299.99 · direct from Anker
Last checked 6 days ago. Prices move — check before you buy.
Spec deltas
The RIVER 2 is $81 cheaper than the C300X and costs less per kilowatt-hour to own, and it still doesn't win this. It's the older unit on EcoFlow's small platform, and it carries the platform's old problems: 50dB under load where the C300X stays near-silentB4, a 60W USB-C port against the Anker's 140W, and a 30ms switchover to the C300X's 10ms.
Those aren't spec-sheet trivia at this size, because these units live indoors, on nightstands and desks. A power station that hits 50dB under load is a box you hear across a quiet room, roughly a running refrigerator sitting beside you. The C300X, by contrast, testers pushed hard and still called virtually silentB4, its fan only becoming audible under a heavy power-tool loadB11.
The C300X also holds 32 more watt-hours, charges a laptop at 140W to the RIVER 2's 60, and switches over three times faster. It costs $81 more and, across its life, a little more per kilowatt-hour, so if your only job is topping up phones outdoors, the RIVER 2's price still speaks. For anyone using one of these where they sleep or work, the Anker is quieter, faster-charging, and worth it, and if you want that from EcoFlow, the answer is the RIVER 3, not the RIVER 2A3.
What the Numbers Reveal
Each conclusion stated first — the numbers behind it on one line, the full analysis below.
At 50dB the RIVER 2 is a presence in a quiet room, a hum you notice while you work or sleep; the C300X testers had to run a circular saw through to make audibleB11. For the indoor, bedside, keep-it-close use these units are bought for, that's not a tiebreaker, it's the point, and it's the exact refinement EcoFlow itself added in the RIVER 3A3.
RIVER 2 is rated 50dB under loadTesters found the C300X near-silent, its fan audible only under a heavy tool loadB4B11These are small units used indoors, on desks and nightstands
Why it mattersAnyone running one of these in a room they occupy should take the quiet unit, and the RIVER 2 is the loud one.
60W trickles a modern laptop rather than driving it: a 16-inch MacBook Pro wants 140W, and most pro laptops want more than 60, so the RIVER 2 can't feed them at full speed while the C300X keeps them topped up. For a work-from-anywhere buyer, that's a daily limitation, not a footnote.
RIVER 2 USB-C tops out at 60WC300X USB-C tops out at 140WA 16-inch MacBook Pro wants 140W, and pro laptops generally want more than 60W
Why it mattersLaptop users specifically should skip the RIVER 2; its port was built for phones, not for work.
You're saving $81 by accepting the loud, slow-switching, weak-port version of a platform EcoFlow already fixed. The RIVER 3 keeps most of the RIVER 2's low price while adding the quiet and the faster UPS the C300X is winning onA3, which makes the RIVER 2 the wrong EcoFlow to line up here, not just the losing one.
RIVER 2 $219 vs C300X $300, and cheaper to own at $0.29 per lifetime kWh vs $0.35RIVER 2 is louder at 50dB, slower to switch at 30ms, and weaker on USB-C at 60WThe RIVER 3 fixes the noise and switchover for close to the RIVER 2's priceA3
Why it mattersIf price is your reason for the RIVER 2, the RIVER 3 is the better cheap EcoFlow; if quiet and charging speed matter, the C300X is the buy.
The specific dimensions that decide these two units — everything else is a tie.
What the Specs Don't Tell You
Selected because: noise (50dB), ups (30ms standby vs 10ms), and warranty all fire; noise is the axis of the whole matchup, so lead here.
Three flags fire here, and for once they're the story, not the footnotes. The loud one is the RIVER 2's: 50dB under load, against a C300X testers called near-silentB4. The switchover splits the same way, the RIVER 2's 30ms basic standby to the C300X's 10ms line-interactive, so the Anker backs a desktop more reliably through an outage. Warranty is the lone tie at five years. Two of the three gaps point at the RIVER 2's age, and both are refinements EcoFlow itself addressed in the newer RIVER 3A3.
PowerScore Breakdown
Selected because: 1666 vs 1502 is the widest score gap in the batch and it's earned by the C300X's modern spec.
overall power score
PowerScore reads 1666 for the C300X to 1502 for the RIVER 2, a 164-point spread that's the widest in this batch, and it's earned. The Anker brings 32 more watt-hours, more than twice the USB-C wattage at 140W to 60, a switchover three times quicker, and the quieter build, all on the same 300W inverter. This isn't a close composite papering over a tie; the C300X is simply the more modern unit.
Lifetime Value
Selected because: cheaperToOwn is p1 ($0.29 vs $0.35); the honesty counterweight to a verdict that still lands on the pricier unit.
cost / lifetime kWh
Here's where the RIVER 2 answers back, and it's the reason this verdict isn't lopsided. It's $219 to the C300X's $300 and cheaper to own, $0.29 per lifetime kilowatt-hour against $0.35, on the same 3,000-cycle rating and five-year warranty. If you're buying purely on cost and will only ever charge phones and a tablet outdoors, the RIVER 2 is the cheaper path and a proven one. The catch is that the RIVER 3 offers nearly that same price without the noise, which makes the RIVER 2's value case a narrow oneA3.
Brand Trust
Selected because: Cross-brand, with the twist that EcoFlow's own RIVER 3 outclasses its RIVER 2 here.
Both live under strong brands. EcoFlow has the biggest catalog and community in portable power and the fastest charging, tempered by patchy support and a 2025 recall on a larger model; the RIVER 2's own knock is simply that it's the previous generation. Anker leans on a decade of charger-brand trust and long-life InfiniPower cells, though SOLIX support is drifting toward AI scripts and firmware has removed features unannounced. For units this affordable you'll mostly self-serve, and EcoFlow's larger community is the better backstop, even as its older RIVER 2 is the weaker hardware here.
Strengths & trade-offs
EcoFlow RIVER 2
Strengths
- +Costs $91 less
- +Lighter by 1.2 lb
- +Faster solar charging
Trade-offs
- –No major technical downsides compared to rival.
Anker SOLIX C300X
Strengths
- +Larger battery capacity
Trade-offs
- –Substantially more expensive (+$91) than the RIVER 2.
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 C300X 1,855Wh (12%). 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
Neither unit covers this scenario's 1,645Wh: the RIVER 2 comes up 1,427Wh short (about 13% covered), the SOLIX C300X 1,400Wh (15%). 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 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
Neither unit
This is the scenario the RIVER 2 loses outright, and it has nothing to do with capacity, where neither quite covers a full 320Wh humidifier night. It's the fan. A CPAP sits two feet from your head, and a station that runs at 50dB under load is one you'll hear all night; the C300X, which testers strained to make audible, is the one that lets you sleep. If a CPAP is why you're buying, the RIVER 2 is close to disqualified here.
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
A laptop, a monitor, and a phone for a workday fit inside both units' capacity, but only one charges the laptop properly. The RIVER 2's 60W USB-C trickles a modern laptop; the C300X's 140W drives it, and does the whole day near-silently. For working from a truck or a cabin, the Anker is the clear fit, and the RIVER 2's weak port and its noise both count against it here.
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
Neither unit
Neither unit can hold the 400W peak this scenario needs — the RIVER 2 on its 300W continuous rating, the SOLIX C300X on its 300W, so capacity never gets a say. This is the wrong size of unit for the job rather than a close call.
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 C300X 4,440Wh (5%). 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
This is the job small stations are actually for, and both do it: the RIVER 2 finishes at 46% used, the SOLIX C300X at 41%. At this size the decider is what rides in the bag — 7.8 lbs for the RIVER 2 against 9 for the SOLIX C300X — and price, not the leftover watt-hours.
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 C300X runs 1.2h vs 1.1h.
$299.99 list · direct from Anker
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 0–16.3hComfort & Convenience
Makes off-grid life actually enjoyablescale 0–3.3hHigh-Draw Appliances
These reveal the real limits¹ 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
July 18, 2026
Verdict: the Anker SOLIX C300X
The C300X takes this despite being the pricier unit and, honestly, the more expensive to own: $0.35 per lifetime kilowatt-hour against the RIVER 2's $0.29. It wins because the RIVER 2 is the older, louder box, rated 50dB under load where testers found the C300X near-silentB4, with a 60W USB-C port to the Anker's 140W and a 30ms standby switchover to a 10ms line-interactive one. For the indoor and bedside use these small units get, those three gaps decide it, and the C300X's extra 32Wh is a bonus. The catch worth stating plainly: the RIVER 2 is $81 cheaper and cheaper to own, and if you only ever charge phones outdoors where noise doesn't matter, it's still the value pick. But EcoFlow's own better answer here is the RIVER 3, which fixes the RIVER 2's noise for close to the same moneyA3.
Editor-assigned confidence, based on cited owner research and spec analysis.
List prices as of July 18, 2026. The links below open EcoFlow's and Anker's current prices.
$299.99 · direct from Anker
Last checked 6 days ago. Prices move — check before you buy.
or check the RIVER 2 price$209.00 list
Written by Wenny Zheng, Portable Power Tester · Station Arena Test Desk · Updated July 18, 2026
Measured Data
Benchmark scores and the full spec record, side by side.
Benchmark scores
Not rated for both units (minimum threshold unmet): UPS.
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 22 Personal-class units), and SOLIX C300X rates 4.7/5 (81st percentile of 22 Personal-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.
UPS Switchover: ≤10ms vs ≤30ms
Both list a UPS mode, at different rated speeds. The SOLIX C300X 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: No Difference
Both units carry the same 5-year warranty, so coverage isn't a tiebreaker here. Worth saying because the per-dollar framing can suggest otherwise: the RIVER 2 works out at 23.9 years of cover per $1,000 spent against the SOLIX C300X's 16.7, but that spread is the price gap, not the terms.
RIVER 2: Noise Level Not Disclosed
The SOLIX C300X publishes its noise level (25dB); the RIVER 2 doesn't publish one. That isn't evidence the RIVER 2 is louder — it means there's no figure to hold it to, and no way to compare the two on this without hearing them. If you're buying for a bedroom, a CPAP, or an apartment, treat the SOLIX C300X's 25dB as the only published number on the table — a spec-sheet figure, not a measurement — and look for hands-on reports of the RIVER 2 before deciding.
Full record above — the Test Desk pick is the SOLIX C300X.
Check SOLIX C300X price →or check the RIVER 2 priceOwnership 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 wins on both sticker price and long-term value. At $0.27/kWh over its lifetime, it's meaningfully cheaper to own. Clear value winner. One thing to know reading the table: both carry the same 3,000-cycle rating, so the lifetime rows are sticker price and capacity in disguise — the wear horizon is identical and decides nothing here.
Brand trust
EcoFlow
Ecosystem
The widest catalog and the largest community in portable power, spanning tiny RIVER units to home systems, with new models arriving constantly.
Support
US-based and uneven: many painless prepaid-label swaps, a real share of long waits or refurbished replacements. Buying via Costco or Amazon strengthens your return hand.
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 very top of the range, the DELTA Pro Ultra platform stacks batteries and inverters into whole-home backup — a flagship path, not a line-wide feature.
Worth knowing
The fastest charging in the class and the deepest accessories, set against a 2025 recall on a larger model, and here an aging RIVER 2 that its own RIVER 3 already outclasses.
Anker
Ecosystem
A trimmer SOLIX range riding Anker's mass-market charger fame, fewer models than EcoFlow but a badge nearly everyone recognizes.
Support
Long known for painless replacements, though SOLIX contact now trends toward AI scripts and clumsy freight on heavy units. The underlying brand trust holds.
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
Durable InfiniPower cells and standout value per watt-hour, with firmware updates that have quietly pulled features.
Analyst note
EcoFlow is the specialist with the deepest bench and the biggest crowd; Anker is the household name with sharp value and a support desk easing off its peak. Here the twist is internal to EcoFlow: its own RIVER 3 is the unit that answers the C300X, while the older RIVER 2 is a generation behind. Between just these two, the Anker is the more modern hardware.
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 C300X
FIXED CAPACITYFixed at 288Wh, with no expansion — so size it for your needs up front rather than planning to add capacity later.
Accepts up to 100W of solar. Limited to a single portable panel.
Adequate ports for most setups, but heavy users may want a power strip.
Realistic full solar rechargeat 70% of rated panel output — see methodology
Analyst note
Neither expands, and that's no knock on either — each is a complete unit at a fixed size. Buy the capacity that covers your needs now (the SOLIX C300X gives you the larger ceiling); you can't add to either later.
What Owners Report
Patterns from published owner reports and long-term reviews — every claim cited to its source below.
EcoFlow RIVER 2
The RIVER 2's field reputation is that of a proven budget unit showing its age. Its spec sheet omits a dB rating, and reports peg it as noticeably louder under load than the newer RIVER 3A1. It shares the RIVER 3's core platform, the 300W output, LiFePO4 chemistry, and roughly hour-long fast charge, and stays a popular, well-understood small stationA2. The honest summary reviewers land on: for strictly indoor use where every dollar counts it's still reasonable, but it lacks the RIVER 3's waterproofing, faster UPS, and quieter operationA3.
“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 C300X
The C300X's defining field trait is silence. Testers pushed it hard and still called it virtually noiseless, the fan barely there even at its limitsB4, with the one exception a heavy power-tool load that made the fan finally ramp upB11. Around that, reviewers liked the premium build, a handle that shrugged off dozens of trunk loadsB12, and an app whose usage history caught a fan drawing twice its rated wattageB10. The honest catches are small and known: a Bluetooth pairing dropout that blocks monitoring until you forget-and-repair the deviceB1, and a single owner report of a unit refusing to charge past 25%B2. As a 2026 SKU, that record is professional testing plus early owner notes rather than years in the field.
“The unit was confirmed to shut itself off when charging very low-draw devices like headphones or a smartwatch — an intended power-saving cutoff rather than a defect, but one that catches owners off guard.”
Sources
teqclub.com · thesolarlab.com · backuppowerhub.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]
- Independent hands-on reviewers found the C300X near-silent at its rated 300W load, though one test noted the fan becoming noticeably audible under a heavier transient/overload draw. [SOLIX C300X · 2 entries]
- AC charging and UPS switchover both performed at or better than spec in hands-on testing — fast wall recharge and an imperceptible transfer that kept a computer, router, and CPAP running through a pulled plug. [SOLIX C300X · 2 entries]
- The most concrete owner-reported defects both sit in the app/charging pipeline: a Bluetooth pairing dropout that blocks monitoring, and a specific report of the battery refusing to charge past 25%. [SOLIX C300X · 2 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
“Users reported trouble connecting the C300X to the Anker app, which blocked monitoring power usage and changing settings; re-pairing by "forgetting" the device in Bluetooth settings and reconnecting through the app usually fixed it.”
teqclub.com — "Solving Common Anker C300X Problems" · unknown · [negative]
- B2
“My Anker solix c300x Portable Power Station will not accept charge more than 25%.”
teqclub.com — "Solving Common Anker C300X Problems" (quoted owner comment) · unknown · [negative]
- B4
“This unit is impressively quiet. Even with the internal fans running when we pushed it to its limits, the C300X makes virtually no noise.”
thesolarlab.com — "Anker C300X Power Station Review" · 2026 · [positive]
- B7
“Pulling the AC plug mid-use while a computer, router, modem, and CPAP machine were running, the computer stayed on without interruption — no screen flicker, no system hiccup.”
backuppowerhub.com — "Anker SOLIX C300X Review" · 2026 · [positive]
- B10
“The app's most useful function was over-the-air firmware updates and historical usage data — the reviewer used the history to notice a portable fan was drawing twice the wattage expected.”
backuppowerhub.com — "Anker SOLIX C300X Review" · 2026 · [positive]
- B11
“Under a 500W circular saw load, the fan ramped up noticeably — a contrast to how quiet the unit stays at its rated 300W.”
backuppowerhub.com — "Anker SOLIX C300X Review" · 2026 · [mixed]
- B12
“The C300X feels premium in a way many budget power stations don't; the carry handle showed no wear or flex after dozens of trunk loads.”
backuppowerhub.com — "Anker SOLIX C300X Review" · 2026 · [positive]
Research compiled July 18, 2026.
Who Should Buy Which
Buy the RIVER 2 if you…
Buy the SOLIX C300X if you…
- →The indoor or bedside user: near-silent under loadB4 where the RIVER 2 hits 50dB, the single biggest reason to choose it.
- →Laptop workers: 140W USB-C to the RIVER 2's 60, enough to fast-charge a 16-inch laptop the RIVER 2 only trickles.
- →Desktop-UPS users: a 10ms line-interactive switchover to the RIVER 2's 30ms basic standbyB7.
- →Anyone wanting the newer, better-built, larger unit: 288Wh, a premium feelB12, and a useful appB10.
If neither fits
If you like EcoFlow's price but not the RIVER 2's noise, the honest answer is neither of these, it's the RIVER 3, which fixes the loudness and the slow switchover for close to the RIVER 2's costA3. And if your real need is a full CPAP night, a weekend, or a blackout, both are too small; a 320Wh night alone outruns the 288Wh Anker, so size up to a 500Wh-and-up unit.
The Bottom Line
The C300X wins this on the things you notice indoors: it's near-silent where the RIVER 2 hits 50dB under loadB4, it charges a laptop at 140W to the RIVER 2's 60, and it switches over three times faster, plus it holds 32 more watt-hours. That it costs $81 more and a little more per kilowatt-hour to own is the honest cost, and for pure outdoor phone-charging the cheaper RIVER 2 still has a case.
Buy the C300X if one of these lives where you sleep or work. But if it's EcoFlow's price you want, don't settle for the RIVER 2; the RIVER 3 fixes its noise for close to the same money and is the smarter cheap pickA3.
Frequently Asked Questions
Answers drawn from the spec record and cited owner research.
Is the EcoFlow RIVER 2 or the Anker SOLIX C300X better?
The C300X, for most uses, even though it's pricier. The RIVER 2 is the older unit: 50dB under load to the Anker's near-silent, a 60W USB-C port to 140W, and a 30ms switchover to 10ms. It's $81 cheaper and cheaper to own, so for outdoor phone-charging on a budget it still works, but indoors the C300X's quiet and charging speed win.
How loud is the RIVER 2 really?
Loud enough to notice indoors. It's rated 50dB under load, roughly a refrigerator running on your desk, where the C300X stayed near-silent in testing until a heavy power tool made its fan ramp. If the unit shares a bedroom or an office, that 25dB gap is the main reason to pay up for the Anker.
Can the RIVER 2 charge a laptop?
Slowly. Its USB-C tops out at 60W, which trickles a modern laptop rather than driving it; a 16-inch MacBook Pro wants 140W, which the C300X delivers and the RIVER 2 can't. For phones and tablets the RIVER 2's port is fine, but laptop users are better served by the Anker.
Should I compare the C300X to the RIVER 2 or the RIVER 3?
The RIVER 3, honestly. The RIVER 2 is the previous generation, and EcoFlow's own RIVER 3 fixes its noise, adds a faster UPS, and stays close to its price. If you're drawn to the RIVER 2 for the money, price out the RIVER 3 before deciding; against the C300X, the RIVER 2's age is doing it no favors.
Is the C300X worth $81 more than the RIVER 2?
For indoor or laptop use, yes: you're buying quiet, 140W charging, a faster switchover, and 32 more watt-hours. For outdoor phone-charging where none of that matters, no, the RIVER 2's lower price and lower cost to own carry it. Just compare the RIVER 3 too before you settle on the cheap option.
Where to buy
EcoFlow RIVER 2
$209.00
$209.00 · direct from EcoFlow
Last checked 8 days ago. Prices move — check before you buy.
Anker SOLIX C300XPick
$299.99
$299.99 · direct from Anker
Last checked 6 days ago. Prices move — check before you buy.
Prices may vary by retailer and are subject to change.