Head-to-head test
EcoFlow RIVER 3 PLUS vs Anker SOLIX C800 Plus
Five of six modeled loads overrun both batteries, so the real question isn't which power station wins — it's whether you need the SOLIX C800 Plus's 768Wh at all, or just the RIVER 3 PLUS's 10.4 lbs and $259 to keep small stuff alive.
Written by Wenny ZhengUpdated
Portable Power Tester, Station Arena Test Desk
EcoFlow
RIVER 3 PLUS
1,917Power Score · Device Hub
$259.00 list · direct from EcoFlow
Anker
SOLIX C800 Plus
2,199Power Score · Appliance Class
$649.00 list · direct from Anker
Spec deltas
The Anker SOLIX C800 Plus wins the numbers that matter for actually running something: 768Wh against the RIVER 3 PLUS's 286Wh, 1,200W of continuous output against 600W, and a PowerScore of 2,199 against 1,917. At $649 against $259, you're paying for real headroom, not just a bigger number on a spec sheet.
That headroom matters because almost nothing modeled on this page fits in either box. Across six household load scenarios, the RIVER 3 PLUS doesn't clear a single one, and the SOLIX C800 Plus clears exactly one: CPAP Overnight, using 49% of its usable capacity while the RIVER 3 PLUS needs 132% and runs out before morning.
None of that makes the RIVER 3 PLUS pointless. At 10.4 lbs and $259, it's a genuinely different purchase: the lightest, cheapest way to keep small stuff alive, with a faster 10ms UPS switchover and meaningfully better warranty value per dollar spent. It's just not the unit for anything else on this page's scenario list.
What the Numbers Reveal
Each conclusion stated first — the numbers behind it on one line, the full analysis below.
Capacity
Add that the RIVER 3 PLUS doesn't clear a single one of the six scenarios modeled on this page, while the SOLIX C800 Plus clears exactly one (CPAP Overnight), and the lower price stops looking like a consolation prize in capability.
RIVER 3 PLUS: $259 for 286Wh, or $0.91 per WhSOLIX C800 Plus: $649 for 768Wh, or $0.85 per Wh
Why it mattersIf price is the only reason you're eyeing the RIVER 3 PLUS, know that it isn't buying a better per-Wh rate or a scenario win — it's buying a lighter, cheaper unit sized for jobs smaller than anything modeled here.
The expansion port only becomes a genuine advantage once your needs would climb past 768Wh. Short of that ceiling, the SOLIX C800 Plus's larger fixed capacity is simply the more complete unit today, no accessory purchase required.
RIVER 3 PLUS: expandable, 286Wh baseSOLIX C800 Plus: fixed at 768Wh, no expansion
Why it mattersDon't credit the RIVER 3 PLUS for expandability unless you can name a real future need above 768Wh — if you can't, the SOLIX C800 Plus's fixed capacity is already there.
continuous output
But the SOLIX C800 Plus's absolute surge ceiling is still 400W higher in raw terms, so for any single appliance whose startup draw tops 1,200W, only the SOLIX C800 Plus can supply it at all, no matter how good the RIVER 3 PLUS's ratio looks on paper.
RIVER 3 PLUS: 1,200W surge over 600W continuousSOLIX C800 Plus: 1,600W surge over 1,200W continuous
Why it mattersCheck the appliance's actual startup wattage against the SOLIX C800 Plus's 1,600W ceiling first, and only lean on the RIVER 3 PLUS's better ratio for loads proportionally close to its own 600W rating.
The specific dimensions that decide these two units — everything else is a tie.
Your Life, Your Pick
Selected because: The RIVER 3 PLUS clears zero of six modeled scenarios and the SOLIX C800 Plus clears one — this is the central finding for a pair at this capacity range.
Across all six scenarios modeled here, the RIVER 3 PLUS doesn't clear a single one, and the SOLIX C800 Plus clears exactly one. The worst mismatch is Van Life Daily, where the modeled 4,685Wh day needs 1,927% of the RIVER 3 PLUS's usable capacity and 718% of the SOLIX C800 Plus's — that's a job for a fixed house-battery bank, not a portable station this size.
The one scenario either unit passes is CPAP Overnight: a 320Wh overnight draw uses just 49% of the SOLIX C800 Plus's usable capacity, while the RIVER 3 PLUS needs 132% and comes up short before morning. Tailgate Party is the closest near-miss on the page — the SOLIX C800 Plus needs 103% of its usable capacity, just barely short of a full pass, while the RIVER 3 PLUS needs 276% and isn't in the conversation.
Lifetime Value
Selected because: cheaperToOwn favors the SOLIX C800 Plus but only by 2 cents per kWh — the real value story is the $390 sticker gap, not the ownership math.
cost / lifetime kWh
Both units share the same 3,000-cycle LiFePO4 rating, so under identical use they're computed to last exactly as long: about 8.2 years on a daily charge, 57.7 years on a weekly one, or 28.8 years on weekends only. The difference isn't how long either one lasts — it's how much energy it delivers over that span: 858 total lifetime kWh for the RIVER 3 PLUS against 2,304 for the SOLIX C800 Plus.
On cost per kWh delivered, the SOLIX C800 Plus is cheaper to own long-term — $0.28 against the RIVER 3 PLUS's $0.30 — but that's a 2-cent gap, not a decisive one. The bigger number is upfront: $649 against $259, or $130 a year of warranty coverage against $52. If ownership cost were the whole story, it wouldn't be much of a story at all; the real spend is the $390 you commit to on day one.
Growth Path
Selected because: The RIVER 3 PLUS's expandability looks like a win until checked against the SOLIX C800 Plus's larger fixed capacity — the house-rule caveat needs unpacking.
solar input
The RIVER 3 PLUS is the one with an expansion port; the SOLIX C800 Plus is sealed at 768Wh. That sounds like a clear point for the RIVER 3 PLUS, until you notice its base capacity is 286Wh — well under what the SOLIX C800 Plus already ships with. A first expansion battery mostly buys back capacity the SOLIX C800 Plus never had to add.
That flips the usual expansion story: the RIVER 3 PLUS's growth path only becomes a real advantage once your needs climb past 768Wh. Short of that line, the SOLIX C800 Plus is simply the bigger, more complete unit on day one, and the RIVER 3 PLUS is shopping in its own accessory aisle just to catch up.
What the Specs Don't Tell You
Selected because: All five firing gotchas favor the RIVER 3 PLUS on paper, which cuts directly against the overall capacity verdict and deserves explaining.
All five spec quirks flagged here point the same direction: toward the RIVER 3 PLUS. It carries a stronger 2.0x surge-to-continuous ratio against the SOLIX C800 Plus's 1.3x, a faster 10ms line-interactive UPS switchover against 20ms, a lower rated noise floor at 30dB against 45dB, and roughly two and a half times the warranty coverage per dollar spent — the same 2.5x gap as the sticker price, since both units carry an identical 5-year term.
None of that changes the overall verdict, and that's the point: the small print favors the RIVER 3 PLUS everywhere, while the big numbers — capacity, output, scenario coverage — favor the SOLIX C800 Plus. Worth flagging on that noise figure specifically: both ratings are spec-sheet numbers, most likely measured at idle, and fan noise on any unit tends to climb once it's actually under a charging load. Treat 30 and 45dB as a floor for each unit, not a guarantee of what you'll hear.
Portability & Form Factor
Selected because: 24 lbs vs 10.4 lbs is one of the starkest, most tangible differences on the page and ties directly to the price and capacity gap.
weight
10.4 lbs is a one-hand grab off the shelf. 24 lbs is a two-hand lift you plan for — more suitcase than daypack. That's well over double the RIVER 3 PLUS's weight, and it's the direct physical cost of the SOLIX C800 Plus's extra capacity and output.
This is the tangible version of the price gap: $390 and 13.6 lbs more, for 482Wh more capacity and 600W more continuous output. If you're carrying this any real distance — up stairs, across a campsite, into a trunk — the RIVER 3 PLUS is the one you'll actually want to have picked up. If it's sitting in one spot doing a bigger job, the extra weight stops mattering.
Strengths & trade-offs
EcoFlow RIVER 3 PLUS
Strengths
- +Costs $390 less
- +Lighter by 13.6 lb
Trade-offs
- –Weaker inverter (-600W) limits appliance compatibility.
Anker SOLIX C800 Plus
Strengths
- +Larger battery capacity
- +Higher AC output
- +Faster solar charging
Trade-offs
- –Substantially more expensive (+$390) than the RIVER 3 PLUS.
- –Significantly heavier (+13.6 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 six 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
This scenario's modeled 2,100Wh draw needs 864% of the RIVER 3 PLUS's usable capacity and 322% of the SOLIX C800 Plus's — both run out well before the weekend's over. At this load, look at a bigger station or plan to recharge daily.
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
An 8-hour blackout at this wattage calls for 1,645Wh. The RIVER 3 PLUS (286Wh) would need 677% of its usable capacity; the SOLIX C800 Plus (768Wh) needs 252%. Neither is built for a full-day outage at this draw — think backup lighting and device charging, not keeping the whole load alive.
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 C800 Plus
This is the one load small enough to fit: a 320Wh overnight draw. The SOLIX C800 Plus uses just 49% of its usable capacity and has room to spare. The RIVER 3 PLUS needs 132% — its 286Wh comes up short before morning.
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 modeled 910Wh workday needs 374% of the RIVER 3 PLUS's usable capacity and 139% of the SOLIX C800 Plus's. The bigger unit gets closer but still runs dry before quitting time — plan on a midday top-up either way.
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 SOLIX C800 Plus comes closest to a pass on this page here, needing 103% of its usable capacity — just short of covering it. The RIVER 3 PLUS needs 276%, not remotely close. Trim the gear list or bring a way to recharge.
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
This is the biggest mismatch on the page: a modeled 4,685Wh day needs 1,927% of the RIVER 3 PLUS's usable capacity and 718% of the SOLIX C800 Plus's. Full-time van life at this draw is a job for a fixed house-battery bank, not either of these portable units.
Battery budget usedlower = more headroom
LOAD Mini-Fridge 150W×24h · Laptop 60W×4h · Phone Charger 15W×3h · LED Lights 40W×5h · Fan 75W×8h
The Load Test
RUNTIME = (Wh × 0.85) ÷ LOAD
None of the six 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 C800 Plus runs 3.2h vs 1.2h.
$649 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 0–43.5hComfort & Convenience
Makes off-grid life actually enjoyablescale 0–8.7hHigh-Draw Appliances
These reveal the real limitsscale 0–0.7h¹ 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 28, 2026
Verdict: the SOLIX C800 Plus, on Power Score margin
Buy the SOLIX C800 Plus if you need this station to actually run something: it carries the higher PowerScore (2,199 vs 1,917), the only scenario-verdict win on this page (CPAP Overnight, at 49% of usable capacity against the RIVER 3 PLUS's 132%), and a slightly lower cost per lifetime kWh ($0.28 vs $0.30). Buy the RIVER 3 PLUS instead if what matters most is price ($259 vs $649), weight (10.4 lbs vs 24 lbs), or warranty value per dollar — just don't expect it to cover anything else on this page's scenario list either.
Editor-assigned confidence, based on cited owner research and spec analysis.
List prices as of July 28, 2026. The links below open EcoFlow's and Anker's current prices.
$649.00 list · direct from Anker
or check the RIVER 3 PLUS price$259.00 list
Written by Wenny Zheng, Portable Power Tester · Station Arena Test Desk · Updated July 28, 2026
Measured Data
Benchmark scores and the full spec record, side by side.
Benchmark scores
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 3 PLUS rates 5.0/5 (99th percentile of 22 Personal-class units), and SOLIX C800 Plus rates 4.0/5 (39th percentile of 19 Compact-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.
45dB Is the Idle Number, Not the Ceiling
The SOLIX C800 Plus is rated at 45dB against the RIVER 3 PLUS's 30dB, and that gap is what shows up on a spec sheet measured at idle or light load. Fan noise on any unit tends to climb further once it's actually under a real charging load — treat 45dB as a floor for the SOLIX C800 Plus in practice, not a hard limit.
Expansion Isn't Automatically the Win It Looks Like
The RIVER 3 PLUS is the one with an expansion port, but it starts at 286Wh — well under the SOLIX C800 Plus's fixed 768Wh. A first expansion battery mostly buys back capacity the SOLIX C800 Plus already ships with. It only becomes a real advantage once your needs climb past 768Wh; short of that, the fixed, bigger unit is the simpler buy.
Surge Power: Inverter Quality Indicator
The RIVER 3 PLUS has a 2× surge-to-continuous ratio vs the SOLIX C800 Plus's 1.3×. A higher ratio (≥2×) means the inverter handles motor startup surges better. That's critical for fridges, AC compressors, and power tools that briefly draw 2-3× their rated wattage. The SOLIX C800 Plus may trip when starting these appliances even though its continuous wattage looks sufficient.
UPS Speed: line-interactive (<10ms) vs standby (<20ms)
The RIVER 3 PLUS switches to battery in 10ms (line-interactive (<10ms)), while the SOLIX C800 Plus takes 20ms (standby (<20ms)). Safe for desktop PCs, routers, and CPAP machines. NAS drives are protected. This matters if you're using it as a home UPS for always-on equipment.
Same 5-Year Warranty, Very Different Price of Entry
Both units carry a 5-year warranty, but the RIVER 3 PLUS's $259 price tag buys about two and a half times the coverage per dollar spent compared to the SOLIX C800 Plus's $649 — real money if you value the peace of mind more than the extra capacity.
Full record above — the Test Desk pick is the SOLIX C800 Plus.
Check SOLIX C800 Plus price →or check the RIVER 3 PLUS 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 3 PLUS is cheaper to buy, but the SOLIX C800 Plus is cheaper to own. At $0.28/kWh over its lifetime vs $0.3/kWh, the SOLIX C800 Plus's higher cycle life and capacity make each dollar go further over the years.
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. Supports up to 180kWh modular expansion with DELTA Pro Ultra X.
Worth knowing
The Oct 2025 DELTA Max 2000 recall (overheating/fire risk, 6 incidents) is worth noting. Also 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 3 PLUS
EXPANDABLESupports EcoFlow expansion batteries, so you can add capacity later without replacing the base unit — useful if your needs may climb past 286Wh.
Accepts up to 200W of solar. Limited to a single portable panel.
Adequate ports for most setups, but heavy users may want a power strip.
Expansion batteries are EcoFlow-specific. You're investing in the EcoFlow ecosystem.
SOLIX C800 Plus
FIXED CAPACITYFixed at 768Wh, with no expansion — so size it for your needs up front rather than planning to add capacity later.
Accepts up to 300W 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
Don't read the RIVER 3 PLUS's expandability as a straight win here: it starts at 286Wh, below the SOLIX C800 Plus's 768Wh, so a first expansion battery largely buys back capacity the SOLIX C800 Plus already includes. It only pulls ahead if you'd grow past 768Wh — short of that, the SOLIX C800 Plus's larger fixed capacity is the simpler value.
What Owners Report
Patterns from published owner reports and long-term reviews — every claim cited to its source below.
EcoFlow RIVER 3 PLUS
Reviewers frame the 600W inverter and 1,200W of X-Boost surge as a genuine upgrade over the entry-level RIVER 3A1, and call the sub-30dB operation genuinely remarkable — quieter than a library, quieter than most refrigeratorsA2. At 10.4 lbs, it's portable enough to carry one-handed while still briefly running a coffee maker, microwave, or space heater off that surge capacityA3.
On longevity, reviewers describe the LiFePO4 chemistry as good for years of regular use before it fadesA4 — the math backs that up at a shared 3,000-cycle rating: about 8.2 years on a daily charge cycle, or 28.8 years if you only run it on weekends.
“286Wh base, expandable to 572Wh (EB300) or 858Wh (EB600), with a genuine 600W inverter (1,200W X-Boost) and 220W solar input — twice the inverter and solar of the base RIVER 3.”
Sources
ecoflow.com · bestgeneratorsolar.com · thepowerpick.com · storagereview.com · phonearena.com · greenreviewshub.com
Anker SOLIX C800 Plus
Reviewers are less settled on the SOLIX C800 Plus. Fan noise draws the most consistent complaint: one reviewer found it unavoidable in a quiet house once the load climbed high enoughB1, though another calls the ramp-up manageable at roughly arm's lengthB11 — a reminder that the rated 45dB figure is a spec-sheet number, not a promise about what fast charging actually sounds like. Capacity draws similar hesitation: one reviewer questioned outright whether 768Wh is enoughB5, and another flagged it as unable to run heavier appliances like kettles or coffee machinesB10 — exactly the kind of load this page's scenarios show it running short on.
It's not all friction. One reviewer ran a fridge and freezer for 8 hours off a single charge and used just 10% of the batteryB6, and a simulated power cut produced no flicker or reboot on connected equipment at allB4 — real-world evidence that light loads and the fast switchover both hold up. But more than one reviewer landed on the same worry about the 768Wh rating itself — one called it an 'awkward middle ground' for a $649 unitB12: roomy next to the RIVER 3 PLUS, modest next to what else that price can buy.
“The pole light felt is a little over the top and unnecessary.”
Sources
dustinabbott.net
Sources & Research Notes
Every owner claim in this report is traceable to a published source. The bracketed references above resolve here.
Recurring owner themes
- Expandable capacity, doubled inverter and solar over the base RIVER 3, remarkable sub-30dB quiet, and light weight are the praise. [RIVER 3 PLUS · 3 entries]
- Fan noise is consistently reported as noticeable during fast AC charging or high sustained wattage, though most reviewers call it 'manageable' rather than a dealbreaker. [SOLIX C800 Plus · 2 entries]
- The companion app is repeatedly praised for remote monitoring/control and firmware delivery, with no reviewers reporting connectivity or crash complaints. [SOLIX C800 Plus · 3 entries]
- 768Wh capacity is flagged by multiple reviewers as the unit's main limitation for heavy appliances and against same-price competitors, even though real-world light loads (fridge, gadgets) performed well. [SOLIX C800 Plus · 4 entries]
- The signature 'Plus' camping-light pole/torches are polarizing: some reviewers call the feature genuinely useful and a lantern-replacement, others call it an unnecessary gimmick that sacrifices the C800's cable-storage cubby. [SOLIX C800 Plus · 3 entries]
- A1
“286Wh base, expandable to 572Wh (EB300) or 858Wh (EB600), with a genuine 600W inverter (1,200W X-Boost) and 220W solar input — twice the inverter and solar of the base RIVER 3.”
ecoflow.com / bestgeneratorsolar.com — RIVER 3 Plus review · 2026 · [positive]
- A2
“Sub-30dB operation is genuinely remarkable — quieter than a library and than most refrigerators.”
thepowerpick.com — RIVER 3 Plus review · 2026 · [positive]
- A3
“Weighs about 10.4 lbs and is highly portable; a small-format station that grows with you, able to briefly run a coffee maker, microwave, or space heater.”
storagereview.com / phonearena.com — RIVER 3 Plus review · 2026 · [positive]
- A4
“LiFePO4 rated for 3,000 charge cycles — around 10 years of everyday use before capacity drops to 80%.”
greenreviewshub.com / bestgeneratorsolar.com — RIVER 3 Plus review · 2026 · [positive]
- B1
“Once the temperature rose above 80F with a 1,030 average wattage, the fan noise was unavoidable and quite present in a quiet house.”
How-To Geek — 'Anker Solix C800 Plus Review: A Power Station Prepared to Illuminate Nighttime' · 2024-03 · [negative]
- B4
“Unplugged the power supply to the C800 Plus to simulate a power outage. No reaction on the monitor, no flicker, just continued operating.”
DustinAbbott.net — 'Anker Solix C800 Plus Power Station Review' · 2024-03 · [positive]
- B5
“My lone concern on this front is whether or not the battery capacity is sufficient.”
DustinAbbott.net — 'Anker Solix C800 Plus Power Station Review' · 2024-03 · [mixed]
- B6
“I connected the Anker and in 8 hours, my frig/freezer used 10% of the power.”
The Gadgeteer — 'Anker SOLIX C800 Plus power station review' · 2024-04 · [positive]
- B10
“it doesn't have the outright storage or power to tackle more heavy duty appliances like kettles or some coffee machines.”
Trusted Reviews — 'Anker SOLIX C800 Plus Review: A great camping companion' · 2024-04 · [negative]
- B11
“The fan does ramp up during fast charging, but the noise is manageable at roughly arm's length.”
The Power Pick — 'Anker SOLIX C800 Plus Review: Camping Lights Meet Serious Power' · 2026-02 · [mixed]
- B12
“The 768Wh capacity sits in an awkward middle ground. It is significantly less than the 1,024Wh offered by the EcoFlow DELTA 3 Plus at the same $649 price.”
The Power Pick — 'Anker SOLIX C800 Plus Review: Camping Lights Meet Serious Power' · 2026-02 · [negative]
Research compiled July 28, 2026.
Who Should Buy Which
Buy the RIVER 3 PLUS if you…
- →Buy the RIVER 3 PLUS if the job is genuinely small: charging phones, laptops, and camera batteries, running a light or two, or briefly running something like a coffee maker or space heater off its X-Boost surge. At 10.4 lbs and $259, it's the one you actually want to carry, and its 10ms UPS switchover and better warranty value per dollar make it a sensible desk-side backup for a PC or router.
Buy the SOLIX C800 Plus if you…
- →Buy the SOLIX C800 Plus if you need this to actually run something for hours, not minutes. It's the only unit on this page that clears a real scenario (CPAP Overnight, at 49% of usable capacity), it carries the higher PowerScore (2,199 vs 1,917), and its cost per lifetime kWh is a hair lower ($0.28 vs $0.30). You're trading $390 and roughly double the RIVER 3 PLUS's weight for genuine headroom.
If neither fits
Skip both if your actual need looks like this page's other five scenarios — an 8-hour blackout, a full weekend of camping, a remote workday, a tailgate party, or full-time van life. All of them overrun even the SOLIX C800 Plus's 768Wh by well over 100%, several by more than 7x. That's a job for a considerably bigger power station, a generator, or a fixed solar-plus-battery setup, not either unit on this page.
The Bottom Line
The SOLIX C800 Plus wins because it's the only unit here built for a real load: 768Wh and 1,200W against the RIVER 3 PLUS's 286Wh and 600W, the higher PowerScore (2,199 vs 1,917), and the only scenario-verdict win on the page. The RIVER 3 PLUS answers a different question — it's $390 cheaper, well under half the weight, and switches faster as a UPS — but it doesn't answer the question this page's scenarios are actually asking.
Five of six loads modeled here overrun both batteries anyway, so don't let either spec sheet oversell what a sub-800Wh station can do. Buy the SOLIX C800 Plus for genuine capacity, the RIVER 3 PLUS for genuine portability, and a bigger unit entirely if your real need looks like a blackout, not an overnight CPAP.
Frequently Asked Questions
Answers drawn from the spec record and cited owner research.
Can either of these get a fridge through an 8-hour blackout?
No. The modeled 8-Hour Blackout draw is 1,645Wh, and the RIVER 3 PLUS would need 677% of its usable capacity to cover it while the SOLIX C800 Plus needs 252% — both run dry well before the outage ends. For that job, look at a station with a couple thousand extra Wh, not either unit here.
Which one should I buy for a CPAP machine?
For running one off-grid all night, the SOLIX C800 Plus — it's the only one of the two with enough room for the modeled 320Wh overnight draw, using 49% of its usable capacity. The RIVER 3 PLUS needs 132% and won't make it to morning. If you're instead using either as a plugged-in UPS for outage protection at home, the RIVER 3 PLUS's 10ms switchover is nominally faster than the SOLIX C800 Plus's 20ms, though both switch fast enough that most CPAP machines won't notice either way.
Is the RIVER 3 PLUS's expansion battery worth paying attention to?
Only if you have a specific need above 768Wh. The base RIVER 3 PLUS is 286Wh, well under the SOLIX C800 Plus's fixed 768Wh, so a first expansion pack mostly buys back capacity the SOLIX C800 Plus already includes with no extra purchase.
Why does the cheaper unit cost more per watt-hour?
Because $259 only buys 286Wh, working out to $0.91 per Wh, while $649 buys 768Wh at $0.85 per Wh. The bigger battery is slightly more efficient on a per-Wh basis — the RIVER 3 PLUS's lower price doesn't buy a better rate, just a smaller total.
Which power station is quieter?
On the spec sheet, the RIVER 3 PLUS at 30dB against the SOLIX C800 Plus's 45dB. Reviewers back up the RIVER 3 PLUS's side of that, while SOLIX C800 Plus reviewers describe real fan noise once the load climbs, split on how noticeable it gets. Treat 45dB as a floor for real-world charging, not a ceiling.
Where to buy
EcoFlow RIVER 3 PLUS
$259.00
$259.00 list · direct from EcoFlow
Anker SOLIX C800 PlusPick
$649.00
$649.00 list · direct from Anker
Prices may vary by retailer and are subject to change.