Head-to-head test
EcoFlow RIVER 2 vs Anker SOLIX C300 DC
The RIVER 2 has two real AC outlets and the C300 DC has none — nearly everything else about this matchup, from capacity to noise to charging speed, favors the unit that can't run a lamp; only the price favors the RIVER 2.
Full profiles: EcoFlow RIVER 2 → · Anker SOLIX C300 DC →
Written by Wenny ZhengUpdated
Portable Power Tester, Station Arena Test Desk
$209.00 · direct from EcoFlow
Last checked 20 days ago. Prices move — check before you buy.
$199.99 · direct from Anker
Last checked 1 day ago. Prices move — check before you buy.
Spec deltas
The EcoFlow RIVER 2 has two AC outlets. The Anker SOLIX C300 DC has zero. That's the one spec in this pair that isn't a matter of degree, and — because the RIVER 2 is also the cheaper of the two — it's one of only two things that favor it.
The DC still weighs 1.63 lbs less, charges over a 140W USB-C port instead of the RIVER 2's single 60W port, and comes out ahead on the engine's lifetime cost-per-kWh math — 0.23 dollars against 0.25. The RIVER 2 costs $209 against the DC's $200. The RIVER 2's own spec sheet lists it running under 50dB in use, and owners report it's noticeably louder in practice than EcoFlow's own newer RIVER 3A1.
So the RIVER 2 isn't winning this on capacity, charging speed, noise, or the engine's lifetime cost-per-kWh math. It's winning on the one thing the DC structurally cannot do — put out AC power at all — plus a modest price edge.
What the Numbers Reveal
Each conclusion stated first — the numbers behind it on one line, the full analysis below.
Capacity
Priced per watt-hour the DC is the more efficient buy at $0.69/Wh against the RIVER 2's $0.74/Wh, because its extra 32Wh outpaces its higher sticker price.
The RIVER 2 lists 2 AC outlets and 600W of surge capacity; the C300 DC lists 0 AC outlets and marks surge not applicableThe RIVER 2 costs $209 and holds 256Wh; the C300 DC costs $200 and holds 288Wh
Why it mattersBuyers optimizing purely for capacity per dollar should lean DC; the RIVER 2's lower price doesn't close the per-watt-hour gap.
For anything running near a bed or a desk overnight, that's a documented real-world gap, not a spec-sheet rounding difference.
The RIVER 2's spec sheet lists it running under 50dB under loadOwners report it's noticeably louder under load than EcoFlow's own newer RIVER 3A1
Why it mattersBuyers who need the AC outlets for something they'll sleep or work near should budget for hearing the RIVER 2 run, and weigh that against the DC's unrated but inverter-free silence.
A 60W port caps out well below what a lot of USB-C laptops draw under real load, while the DC's 140W port covers nearly any USB-C laptop on the market today.
The RIVER 2 has a single 60W USB-C portThe C300 DC has four USB-C ports rated up to 140W
Why it mattersBuyers charging laptops and phones rather than running appliances get a materially better charging experience from the unit with zero AC outlets.
The DC's lifetime-rate edge is two cents (0.23 against 0.25) — a real but thin margin for the DC.
The engine prices the C300 DC at 0.23 dollars per lifetime kWh against the RIVER 2's 0.25The RIVER 2 delivers 768 lifetime kWh against the DC's 864, even though it's the cheaper unit to buy upfront
Why it mattersAnyone treating lifetime cost-per-kWh as the deciding number should default to the DC, but the margin is thin enough that a strong preference for the lower sticker price is a defensible reason to pick the RIVER 2 instead.
The specific dimensions that decide these two units — everything else is a tie.
What the Specs Don't Tell You
Selected because: UPS advantage, the 50dB noise disclosure, and the DC's undisclosed rating are the load-bearing facts for this pair.
The UPS card is the one the engine calls an outright advantage rather than a note, and it goes to the RIVER 2 — a documented sub-30ms switchover behind real AC outlets. The DC has nothing to switch over, so the field is empty rather than slower.
The RIVER 2's noise card is informational, not a warning, but the number behind it — under 50dB — is exactly what owners describe as the louder of EcoFlow's own two small unitsA1. The DC's noise card is a warning for a different reason: no rating is published at all, which given it has no inverter fan to spin up may simply mean there's less to measure.
Lifetime Value
Selected because: The RIVER 2 is the cheaper unit but still loses on total lifetime kWh delivered — worth showing plainly given how close the two prices are.
cost / lifetime kWh
The DC wins the lifetime math by two cents: 0.23 dollars per lifetime kWh against the RIVER 2's 0.25, built on 864 total lifetime kWh delivered against the RIVER 2's 768. The RIVER 2 costs $9 less to buy outright, so the DC's edge here is pure energy delivered and rate, not a lower sticker price.
The RIVER 2's other consolation is warranty economics: $38 per warranty-year against the DC's $67. It's the cheaper unit outright and still carries five years of coverage against the DC's three. That's a real number, but it's a coverage argument, not a cost-of-energy one.
Portability & Form Factor
Selected because: A real 1.63 lb gap plus the single vs quad USB-C port story belongs together.
weight
1.63 lbs separates these two — noticeable in a hand, not a real strain either way. The bigger portability story is charging speed: the RIVER 2's single 60W USB-C port against the DC's four ports up to 140W, which matters more on a trip than the pound and a half difference in the bag.
That port gap tracks the same story as the rest of the page: strip the AC inverter and its outlets, and what's left is a device-charging box built to move fast on the one thing it actually does.
Brand Trust
Selected because: Cross-brand pair with real, current caveats on both sides worth surfacing.
EcoFlow brings the deeper category ecosystem and faster charging tech across its lineup, but it's also the brand with the more recent black eye — the October 2025 DELTA Max 2000 recall over overheating risk is worth knowing about even on a small unit like the RIVER 2.
Anker's SOLIX line carries the parent brand's consumer-electronics trust and, on the Gen 2 lineup specifically, some of the best dollar-per-watt-hour value in the category — but recent reports describe SOLIX support sliding toward generic AI-driven responses. Neither brand's support reputation should be the deciding factor here; the AC outlet question already is.
Strengths & trade-offs
EcoFlow RIVER 2
Strengths
- +Longer warranty
- +Faster solar charging
Trade-offs
- –No major technical downsides compared to rival.
Anker SOLIX C300 DC
Strengths
- +Costs $9 less
- +Lighter by 1.6 lb
- +Larger battery capacity
Trade-offs
- –No major technical downsides compared to rival.
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
The SOLIX C300 DC has no AC outlets, so the led lights and box fan in this scenario never plug in — it's a DC station for USB and 12V gear, and no wattage figure changes that, so capacity never gets a say. This is the wrong kind of unit for the job rather than a close call. The RIVER 2 doesn't have the energy either — 218Wh usable against 2,100Wh, 1,882Wh short — so neither route works.
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
The SOLIX C300 DC has no AC outlets, so the fridge, router + modem and the rest in this scenario never plug in — it's a DC station for USB and 12V gear, and no wattage figure changes that, so capacity never gets a say. This is the wrong kind of unit for the job rather than a close call. The RIVER 2 doesn't have the energy either — 218Wh usable against 1,645Wh, 1,427Wh short — so neither route works.
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
Neither unit covers this scenario's 320Wh: the RIVER 2 comes up 102Wh short (about 68% covered), the SOLIX C300 DC 75Wh (76%). Either gets you most of the way, so this is a scenario you plan around rather than one you should rule them out for.
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
The SOLIX C300 DC has no AC outlets, so the external monitor and router + modem in this scenario never plug in — it's a DC station for USB and 12V gear, and no wattage figure changes that, so capacity never gets a say. This is the wrong kind of unit for the job rather than a close call. The RIVER 2 doesn't have the energy either — 218Wh usable against 910Wh, 692Wh short — so neither route works.
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
The RIVER 2 can start the 400W peak but not hold it — 600W of surge gets it going, then the 300W continuous rating takes over, and the SOLIX C300 DC has no AC outlets, so the blender and led tv in this scenario never plug in — it's a DC station for USB and 12V gear, and no wattage figure changes that, so capacity never gets a say. This is the wrong kind 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
The SOLIX C300 DC has no AC outlets, so the mini-fridge, led lights and the rest in this scenario never plug in — it's a DC station for USB and 12V gear, and no wattage figure changes that, so capacity never gets a say. This is the wrong kind of unit for the job rather than a close call. The RIVER 2 doesn't have the energy either — 218Wh usable against 4,685Wh, 4,467Wh short — so neither route works.
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 C300 DC at 41%. At this size the decider is what rides in the bag — 6.2 lbs for the SOLIX C300 DC against 7.8 for the RIVER 2 — 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
Only the RIVER 2 can run this load — the SOLIX C300 DC has no AC outlets for the wall-plug gear in it.
$209 list · direct from EcoFlow
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 0–2.9hHigh-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 15, 2026
Verdict: the EcoFlow RIVER 2
If a wall outlet is part of the job, the RIVER 2 wins by default — it's the only one of these two with AC outlets at all, and it backs them with a documented sub-30ms UPS switchover. Everywhere else, this is a rough matchup for the RIVER 2 to defend, even at $9 cheaper: it holds 32Wh less, ships a single 60W USB-C port against the DC's four up to 140W, and runs under 50dB where the DC's rating is undisclosed but owners flag the RIVER 2 as the noisier of EcoFlow's own two small unitsA1. Buy the RIVER 2 because you need the outlets — the lower price is a genuine bonus on top, not the reason to buy it.
Editor-assigned confidence, based on cited owner research and spec analysis.
List prices as of July 15, 2026. The links below open EcoFlow's and Anker's current prices.
$209.00 · direct from EcoFlow
Last checked 20 days ago. Prices move — check before you buy.
or check the SOLIX C300 DC price$199.99 list
Written by Wenny Zheng, Portable Power Tester · Station Arena Test Desk · Updated July 15, 2026
Measured Data
Benchmark scores and the full spec record, side by side.
Benchmark scores
Not rated for both units (minimum threshold unmet): CPAP, Tailgating.
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 (33rd percentile of 22 Personal-class units), and SOLIX C300 DC rates 4.4/5 (62nd 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.
SOLIX C300 DC: No AC Outlets At All
The SOLIX C300 DC's 300W is a DC port total — USB and 12V — not an inverter rating. Anything with a wall plug (a fridge, a TV, a coffee maker, most fans and lamps) never plugs in, at any wattage. That's the design, not a defect: it buys weight, silence, and efficiency for phone, laptop, camera, and 12V-CPAP loads. The RIVER 2 carries a real inverter behind 2 AC outlets, so it plays in both worlds. Decide which side of that line your gear lives on before weighing anything else on this page.
The RIVER 2's UPS Switchover Only Matters Because It Has Outlets to Protect
Its sub-30ms switchover is a real, documented spec — but it's protecting AC-connected gear specifically. The DC has no AC outlets to put behind a UPS in the first place, so the comparison isn't close versus slow, it's present versus not applicable.
5 Years vs 3 — and the RIVER 2 Actually Wins This One
The RIVER 2's five-year warranty against the DC's three works out to $38 per warranty-year versus $67 — and the RIVER 2 is the cheaper unit outright too. It's the one line item on this page where the RIVER 2 doesn't just win, it wins for free.
Full record above — the Test Desk pick is the RIVER 2.
Check RIVER 2 price →or check the SOLIX C300 DC 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
Both units have similar long-term ownership costs ($0.27/kWh vs $0.23/kWh). The price difference is what you see on the sticker — neither is a hidden bargain or rip-off. 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
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-based phone/email/chat support (1-800-368-8604). Experiences are polarized — many report hassle-free prepaid-label replacements, but others report long waits and refurbished units sent for new claims. Pro tip: buying from Costco or Amazon gives you a stronger return safety net.
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
Tested subscription paywalls for advanced app features in early 2025 before community backlash paused the plan. No parts or service offered out of warranty.
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
Support quality appears to be declining from its historically excellent level. Firmware updates have removed features without warning. Expansion ecosystem is smaller than EcoFlow's.
Analyst note
EcoFlow positions itself as a mid-to-premium brand with stronger support infrastructure, while Anker competes on value. The question is whether the EcoFlow ecosystem and support premium is worth it for your use case.
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 C300 DC
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 C300 DC 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
Coverage of the RIVER 2 is largely comparative — it shares its core platform with the newer RIVER 3, running the same 300W output, LiFePO4 chemistry, and roughly 60-minute fast charging, and remains a popular, proven budget unit in its own rightA2. The spec sheet's under-50dB noise figure lines up with owner reports that it runs noticeably louder in practice than the RIVER 3 that replaced itA1.
The going recommendation is qualified: for strictly indoor use where every dollar counts, the RIVER 2 is still reasonable, but it lacks the RIVER 3's refinements — better waterproofing, a faster UPS switchover, and quieter operationA3. None of that changes what it does have that the DC doesn't: two AC outlets.
“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 C300 DC
Coverage of the DC leans on its charging story: 2 USB-A ports and 4 USB-C ports plus a 12V car socket, with two-way USB-C PD 3.1 taking the unit itself to 80% in about an hourB2. Owners report that's enough to charge a phone and laptop several times over, run a fan for hours, or power a small light setupB3.
That capacity comes from the same tradeoff that keeps it under 6.2 lbs — no AC inverter on boardB1. Reviewers are direct about what that means in practice: it's built for modern travelers charging devices, not for running AC appliancesB4, which is precisely the gap the RIVER 2's two outlets exist to fill.
“A 288Wh unit that ditches the heavy AC inverter to focus on DC power, keeping it very light at about 6.2 lbs.”
Sources
the-gadgeteer.com · forbes.com · androidpolice.com · batteryessence.com · bestbuy.com · campingsolar.us
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]
- Light DC-only design (no AC inverter), fast USB-C charging, and good port selection for device charging are the highlights. [SOLIX C300 DC · 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
“A 288Wh unit that ditches the heavy AC inverter to focus on DC power, keeping it very light at about 6.2 lbs.”
the-gadgeteer.com / forbes.com — SOLIX C300 DC review · 2026 · [positive]
- B2
“Offers 2 USB-A and 4 USB-C ports plus a 12V car socket; two-way USB-C with PD 3.1 recharges the unit to 80% in about 1 hour.”
androidpolice.com / batteryessence.com — SOLIX C300 DC review · 2026 · [positive]
- B3
“Owners praise its portability and capacity — enough to charge a phone and laptop several times, run a fan for hours, or power a small light setup.”
bestbuy.com owner reviews — SOLIX C300 DC / C300X · 2026 · [positive]
- B4
“A DC-focused design with app integration and solar support — best for modern travelers charging devices, not running AC appliances.”
androidpolice.com / campingsolar.us — SOLIX C300 DC review · 2026 · [mixed]
Research compiled July 15, 2026.
What Owners Actually Report
Drawn from 35 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 C300 DC
12 claims from 8 comments · 10 from owners · 5 with figures
- Solar input
- 4 · 100% negative
- Runtime
- 2 · 0% negative
- Charging
- 2 · 39% negative
- Other
- 1 · 0% negative
- Size & weight
- 1 · 0% negative
What owners complain about
28V input ceiling blocks a 25.6V LiFePO4 bank, which can reach 29.2V fully charged.
Solar inputmeasuredowner4 agreedsource →
Says the C300 DC has no pass-through charging and just cycles between 98% and 100%.
Charging7 agreedsource →
DC5521 plugs with poor tolerances have heated up at 5A; wishes it used XT60 throughout.
Build qualityownersource →
What owners praise
BiPAP with heated hose and humidifier at 80% used 47% of the 288Wh pack over 5 hours of sleep.
Runtimemeasuredowner5 agreedsource →
Can be charged over USB-C at up to 140W, which he thinks is fantastic.
Chargingmeasuredownersource →
His favorite unit: small, transportable, very efficient on 12V and charges well off solar.
Otherownersource →
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 need to plug in an AC device at all — a lamp, a router, a fan that isn't USB-powered — since the DC has no outlet for any of that.
- →You want a documented sub-30ms UPS switchover for something that can't tolerate a slow transfer, and you're willing to accept a louder, less capacious unit to get it — though at least it's the cheaper of the two.
Buy the SOLIX C300 DC if you…
- →Every device you're charging runs on USB-C, USB-A, or 12V — for about $9 more upfront, the DC gives you 1.63 lbs less weight, 32Wh more capacity, and a 140W USB-C port that charges laptops the RIVER 2's 60W port can't keep up with.
- →You want the better lifetime-value pick outright: 0.23 dollars per kWh against the RIVER 2's 0.25, on more total energy delivered over the unit's rated life.
If neither fits
Neither covers a real weekend camping trip (roughly 2,100Wh needed) or an 8-hour multi-appliance blackout (roughly 1,645Wh needed) — both units run out well short of either job regardless of which one has outlets. Step up to a 1,000Wh-plus unit from either brand for that use case.
The Bottom Line
This one has a narrow, hard gate: does the job need an AC outlet or not. The RIVER 2 has two; the C300 DC has zero, and that fact — joined by a modest price edge — is doing most of the work in any RIVER 2 recommendation.
Past that gate, the DC wins most of what's left — capacity, USB-C speed, and the engine's own lifetime cost-per-kWh math — even though the RIVER 2 is the cheaper of the two. Buy the RIVER 2 because you need the outlets; take the lower price as a bonus, not as the reason.
Frequently Asked Questions
Answers drawn from the spec record and cited owner research.
What's the real difference between the RIVER 2 and the SOLIX C300 DC?
The RIVER 2 has two AC outlets backed by a sub-30ms UPS switchover; the C300 DC has none. Past that one fact, the DC costs a bit more ($200 against $209) but holds more capacity (288Wh against 256Wh) and charges faster over USB-C (140W against 60W).
Can the SOLIX C300 DC power anything that plugs into a wall?
No. Its spec sheet lists zero AC outlets — it charges and outputs only over USB-A, USB-C, and a 12V car socket. If the job involves a standard wall plug, the RIVER 2 is the only one of these two that can do it.
Is the RIVER 2 loud?
Its spec sheet lists it running under 50dB under load, and owners report it's noticeably louder in practice than EcoFlow's own newer RIVER 3. The DC has no published noise rating at all, but it also has no AC inverter running under load to generate the noise in the first place.
Which one is the better value?
The DC, on the engine's lifetime cost-per-kWh metric: 0.23 dollars per lifetime kWh against the RIVER 2's 0.25, built on more total energy delivered over its rated life — even though the DC costs $9 more upfront. The RIVER 2's recovery is warranty economics ($38 per warranty-year against the DC's $67) plus the lower sticker price itself.
Which one should I get for a CPAP or something I'll sleep near?
If your CPAP plugs into AC, the RIVER 2 is your only option here, but its documented under-50dB noise level and owner reports of it running louder than its own newer sibling are worth knowing going in. If your device charges over USB-C, the DC's undisclosed rating and lack of an inverter fan make it the quieter bet by design.
Where to buy
EcoFlow RIVER 2Pick
$209.00
$209.00 · direct from EcoFlow
Last checked 20 days ago. Prices move — check before you buy.
Anker SOLIX C300 DC
$199.99
$199.99 · direct from Anker
Last checked 1 day ago. Prices move — check before you buy.
Prices may vary by retailer and are subject to change.