Head-to-head test
EcoFlow RIVER 2 Pro vs Anker SOLIX C800 Plus
Same 768Wh tank, but the RIVER 2 Pro now undercuts the C800 Plus by about $300 and carries 6.8 lbs lighter — the C800 Plus still pushes 400W more continuous power and runs 17dB quieter, but that's a steep premium to pay on an identical battery.
Written by Ian SchneiderUpdated
Solar & Off-Grid Tester, Station Arena Test Desk
EcoFlow
RIVER 2 Pro
2,481Power Score · Appliance Class
$349.00 list · direct from EcoFlow
Anker
SOLIX C800 Plus
2,199Power Score · Appliance Class
$649.00 list · direct from Anker
Spec deltas
The EcoFlow RIVER 2 Pro and Anker SOLIX C800 Plus both hold exactly 768Wh, so the deciding factors are what surrounds that identical battery: price, continuous output, and noise. The RIVER 2 Pro now sells for $349 against the C800 Plus's $649 — about $300 less for the same energy — while the C800 Plus answers with 1,200W continuous against 800W, a full 400W more from the same size battery.
On the spec sheet the C800 Plus keeps the hardware edges. Its fan is rated 45dB under load against the RIVER 2 Pro's up-to-62dB figure, which EcoFlow's own product page documentsA2 — and How-To Geek's testing confirms the C800 Plus's fan noise becomes present but doesn't dominate a room even under sustained heavy drawB1. Solar input tilts the same way: 300W against 220W. The catch is that all of it now rides on top of a roughly $300 higher price for the same 768Wh.
The RIVER 2 Pro pulls ahead on the two things that usually decide a same-capacity matchup: price and weight — about $300 less and 17.2 lbs against the C800 Plus's 24. That's enough to make it the default pick unless the C800 Plus's stronger inverter, faster solar, or quieter fan solves a specific problem.
What the Numbers Reveal
Each conclusion stated first — the numbers behind it on one line, the full analysis below.
continuous output
That's still 50% more continuous output — enough to run a heavier combined load (a fridge plus a few smaller devices) that would push the RIVER 2 Pro toward its ceiling — but it now costs roughly 85% more for the identical 768Wh, so the premium buys inverter headroom, not storage.
RIVER 2 Pro outputs 800W continuous for $349; C800 Plus outputs 1,200W continuous for $649Both units hold the identical 768Wh capacity
Why it mattersAnyone who genuinely runs multiple higher-draw devices at once may still want the C800 Plus's output headroom — but only if that need justifies paying about $300 more for the same battery.
That's the signature of a stronger inverter doing more of its work at sustained power rather than leaning on a brief surge window — practically, the C800 Plus is less likely to be caught mid-task by a compressor kicking on.
RIVER 2 Pro surge rating is 1,600W against an 800W continuous rating — a 2.0x surge-to-continuous ratioC800 Plus surge rating is also 1,600W but against a 1,200W continuous rating — a 1.33x ratio
Why it mattersBuyers running appliances with real startup surge (fridges, pumps) get more built-in margin from the C800 Plus.
The C800 Plus's fan noise is reviewer-documented as situational (heat plus heavy draw); the RIVER 2 Pro's 62dB is simply its rated ceiling under normal fast charging, a harder number to avoid.
RIVER 2 Pro is rated at 62dB under load per EcoFlow's own spec pageA2C800 Plus is rated at 45dB under load, and reviewer testing found the fan noticeable above 80°F and 1,030W average draw but not overwhelmingB1
Why it mattersAnyone charging or discharging at speed indoors, near a bedroom or workspace, should weight the C800 Plus's lower baseline over the RIVER 2 Pro's documented ceiling.
weight
That's a real advantage for anyone hauling the unit any real distance by hand rather than wheeling it from a trunk to a campsite — and on this page it now stacks on top of the RIVER 2 Pro's roughly $300 lower price rather than standing alone.
RIVER 2 Pro weighs 17.2 lbs; C800 Plus weighs 24 lbsBoth hold the identical 768Wh capacity
Why it mattersBuyers who carry the unit by hand get the lighter and cheaper option in the RIVER 2 Pro; the C800 Plus's power and noise edges have to outweigh both.
The specific dimensions that decide these two units — everything else is a tie.
PowerScore Breakdown
Selected because: Identical capacity but a 350-point power score gap driven by output, solar input, and noise.
overall power score
2,183 for the RIVER 2 Pro against 2,533 for the C800 Plus, a 350-point gap that traces directly to the C800 Plus's 400W continuous-output advantage and faster 300W solar input — both units share the same battery, so this score is really measuring what's built around it.
A gap this size on identical capacity is a rare clean read: the C800 Plus's inverter and charging hardware are doing more with the same 768Wh — but that hardware now carries a roughly $300 higher price, so the power-score lead is exactly what the premium buys.
Lifetime Value
Selected because: Same cycle and warranty terms make the cost-per-kWh gap a clean read on which unit is cheaper to own.
cost / lifetime kWh
Both units share the identical 3,000-cycle, 5-year warranty terms, so the cost-per-lifetime-kWh gap — now 15 cents for the RIVER 2 Pro against 28 cents for the C800 Plus — is purely the roughly $300 price difference showing up in the math.
Cost per warranty-year makes the same case in plainer terms: about $70 a year for the RIVER 2 Pro, $130 for the C800 Plus. There's no durability argument to offset it — the coverage is identical on both sides.
What the Specs Don't Tell You
Selected because: Fan noise and surge ratio are the concrete, spec-true differentiators between two same-capacity units.
The noise gap favors the C800 Plus clearly: 45dB against the RIVER 2 Pro's manufacturer-documented 62dBA2, though reviewer testing notes the C800 Plus's fan does become present once temperatures climb above 80°F under sustained heavy drawB1 — worth knowing if it's running in a hot garage or vehicle.
The surge-to-continuous ratio also tells a story: the RIVER 2 Pro needs a 2.0x surge margin to hit its 1,600W ceiling, while the C800 Plus gets there at just 1.33x — a sign its inverter is doing more of the work at sustained power rather than leaning on a brief surge window.
Strengths & trade-offs
EcoFlow RIVER 2 Pro
Strengths
- +Costs $300 less
- +Lighter by 6.8 lb
Trade-offs
- –Can receive complaints about fan noise under heavy load.
Anker SOLIX C800 Plus
Strengths
- +Higher AC output
- +Faster solar charging
Trade-offs
- –Substantially more expensive (+$300) than the RIVER 2 Pro.
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
Neither unit can fully handle this scenario (needs 2,100Wh). You'd need a higher-capacity station or to cut back on usage.
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 can fully handle this scenario (needs 1,645Wh). You'd need a higher-capacity station or to cut back on usage.
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
Either unit
Both are wildly overqualified for CPAP. You're using 49% or less. Save your money and buy whichever is cheaper; the extra capacity is completely wasted on a 40W overnight load. Put the savings toward a second battery for multi-night trips.
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 unit can fully handle this scenario (needs 910Wh). You'd need a higher-capacity station or to cut back on usage.
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 fully handle this scenario (needs 670Wh). You'd need a higher-capacity station or to cut back on usage.
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 can fully handle this scenario (needs 4,685Wh). You'd need a higher-capacity station or to cut back on usage.
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
Dead heat — both run this 205W load for roughly 3.2h. Pick on price, weight, or ports.
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 15, 2026
Verdict: the RIVER 2 Pro
Identical 768Wh capacity removes storage from the argument entirely, so the question is what you pay for everything built around that battery — and at $349 against $649 the RIVER 2 Pro is now about $300 cheaper for the same energy, plus 6.8 lbs lighter. The C800 Plus keeps genuine hardware edges: 1,200W continuous against 800W, 300W solar input against 220W, and 45dB under load against a manufacturer-documented 62dB on the RIVER 2 ProA2. But those are now a roughly $300 premium on the same 768Wh, and the RIVER 2 Pro is the cheaper unit to own by the engine's lifetime math. Unless you specifically need the stronger inverter, faster solar, or quieter fan, the RIVER 2 Pro is the smarter buy; the C800 Plus earns its premium only for buyers who will actually use that extra output and can keep it out of a hot space.
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.
$349.00 list · direct from EcoFlow
or check the SOLIX C800 Plus price$649.00 list
Written by Ian Schneider, Solar & Off-Grid 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): 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 Pro rates 4.5/5 (72nd percentile of 19 Compact-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 vs a Documented 62dB Ceiling
The C800 Plus stays quieter under most conditions, though reviewer testing found its fan becomes present once temperatures climb above 80°F under sustained heavy draw. The RIVER 2 Pro's 62dB is EcoFlow's own documented figure under normal fast charging — a harder ceiling to avoid.
Same 1,600W Ceiling, Different Margin to Get There
The RIVER 2 Pro needs a 2.0x surge margin over its 800W continuous rating to hit 1,600W. The C800 Plus needs only 1.33x over its 1,200W continuous rating — a sign of a stronger inverter doing more of the work at sustained power.
UPS Speed: standby (<20ms) vs basic standby
The SOLIX C800 Plus switches to battery in 20ms (standby (<20ms)), while the RIVER 2 Pro takes 30ms (basic standby). Most electronics handle this fine, but sensitive server equipment may hiccup. This matters if you're using it as a home UPS for always-on equipment.
Same Coverage, Different Yearly Cost
Both units carry identical 5-year, 3,000-cycle terms. The RIVER 2 Pro works out to about $70 per warranty-year, the C800 Plus to about $130 — purely a function of the roughly $300 price gap.
Full record above — the Test Desk pick is the RIVER 2 Pro.
Check RIVER 2 Pro price →or check the SOLIX C800 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 2 Pro wins on both sticker price and long-term value. At $0.15/kWh over its lifetime, it's meaningfully cheaper to own. Clear value winner.
Delivers each lifetime kWh for $0.13 less — check the RIVER 2 Pro price →
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 2 Pro
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 220W of solar. Limited to a single portable panel.
Adequate ports for most setups, but heavy users may want a power strip.
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
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 RIVER 2 Pro 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 Pro
The RIVER 2 Pro's fan noise isn't just a spec-sheet number — EcoFlow documents it as up to 62dB under heavy charge or discharge on its own product pageA2, and one owner considered it bad enough to cut into the case and swap in quieter fansA1. On the medical-device front, a van-dweller running a CPAP overnight through the unit reports no issues with a ResMed AirSense 11A4, though a separate Facebook thread asking whether UPS-style use shortens battery life doesn't surface a clear answerA3 — genuine RIVER 2 Pro-specific field data beyond these four points is thin.
“Will using River 2 Pro as a UPS affect battery life ...”
Sources
ctrl-alt-rees.com
Anker SOLIX C800 Plus
Reviewer testing is extensive on the C800 Plus. How-To Geek found fan noise became unavoidable once temperatures climbed above 80°F under a 1,030W average drawB1, and flagged the absence of onboard cable storage as a minor annoyanceB3. DustinAbbott.net's UPS test found zero flicker or reaction on a connected monitor when AC power was pulledB4, though noted lingering doubt about whether 768Wh is genuinely enough capacity for some usersB5. The Gadgeteer reported a fridge/freezer used only 10% of the battery over 8 hoursB6 and praised the companion app after a camping tripB7, while Trusted Reviews and The Power Pick both flagged the 768Wh capacity as tight against heavier appliances like kettles or coffee machinesB10B12 — reviewers are split on the signature camping-light pole, with some calling it a genuine lantern replacementB14 and others calling it an unnecessary gimmick that eats into cable storageB2B3.
“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
- Fan noise at high wattage charging/discharging is a consistent owner and manufacturer-acknowledged complaint, severe enough that some owners physically mod the unit with quieter fans. [RIVER 2 Pro · 2 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
“I've since performed the same mod on my RIVER 2 PRO and it works great for that unit, too - although it did involve cutting away some of the internal plastic.”
ctrl-alt-rees.com blog — 'EcoFlow RIVER 2 Noisy Fan Fix!' · 2022-11-17 · [negative]
- A2
“When charging and discharging at high wattage, RIVER 2 Max and RIVER 2 Pro may make a noise up to 62db.”
EcoFlow official product page — RIVER 2 Series specs/FAQ footnotes · unknown · [negative]
- A3
“Will using River 2 Pro as a UPS affect battery life ...”
Facebook — EcoFlow Club group post title · unknown · [mixed]
- A4
“I'm very new to CPAP (1 week) and I live in a van. I have solar and a decent battery bank and I've got the ResMed DC-DC cable which powers my AirSense 11 AutoSet overnight no problem.”
Apnea Board forum — '[Equipment] EcoFlow River 2 Pro' thread · 2025-07 · [mixed]
- 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]
- B2
“The pole light felt is a little over the top and unnecessary.”
How-To Geek — 'Anker Solix C800 Plus Review: A Power Station Prepared to Illuminate Nighttime' · 2024-03 · [mixed]
- B3
“As it is, there's nowhere to keep the cords when not using them.”
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]
- B7
“My other power stations do not have a companion phone app. But after the first trip, I saw how this feature would come in handy.”
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]
- 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]
- B14
“We stopped packing separate lanterns after the first week, streamlining our camping setup noticeably.”
BackupPowerHub — 'Anker SOLIX C800 Plus Review: Best Mid-Range with Camping Lights' (45-day, 8-trip field test) · 2026 (article ~1 week old at time of research) · [positive]
Research compiled July 15, 2026.
Who Should Buy Which
Buy the RIVER 2 Pro if you…
- →You want the same 768Wh for about $300 less — the RIVER 2 Pro is now the cheaper unit up front and over its lifetime.
- →You're carrying the unit by hand any real distance and the 6.8-lb weight saving matters.
- →You're fine with a 62dB fan during fast charging and don't need the C800 Plus's extra continuous output.
Buy the SOLIX C800 Plus if you…
- →You specifically need more continuous output (1,200W vs 800W) or faster 300W solar from the same 768Wh, and the roughly $300 premium is worth it for that headroom.
- →You want the quieter unit under most conditions and can keep it out of a hot garage or vehicle where its fan becomes more noticeableB1.
If neither fits
If the actual need is a two-night camping trip (about 2,100Wh) or an 8-hour multi-appliance blackout (about 1,645Wh), both units fail that job at roughly the same margin — each lands north of 250% of what the job needs. A larger-capacity unit fits that use case better than choosing between these two.
The Bottom Line
Identical 768Wh capacity strips this down to what's built around the battery — and price now leads that list. At about $300 less for the same energy, the RIVER 2 Pro is the value pick; the C800 Plus still counters with 400W more continuous output, faster solar input, and a quieter fan than the RIVER 2 Pro's manufacturer-documented 62dB ceilingA2, but all of it now costs a premium.
For the same battery, the RIVER 2 Pro is both cheaper and 6.8 lbs lighter. Unless the C800 Plus's stronger inverter, faster solar, or quieter fan solves a specific problem, the RIVER 2 Pro is the smarter buy.
Frequently Asked Questions
Answers drawn from the spec record and cited owner research.
The RIVER 2 Pro and C800 Plus both hold 768Wh — what actually separates them?
Price, continuous output, and noise. The RIVER 2 Pro is now about $300 cheaper for the same 768Wh and 6.8 lbs lighter; the C800 Plus counters with 1,200W continuous against 800W and a quieter fan under most conditions (45dB vs a documented 62dB).
Is the C800 Plus's fan actually quiet?
Mostly, but not always. Reviewer testing found it becomes noticeable once temperatures climb above 80°F under sustained heavy draw, though it's still rated well below the RIVER 2 Pro's documented 62dB ceiling. Expect more noise in a hot garage or vehicle than in a climate-controlled room.
Which one is cheaper to own long-term?
The RIVER 2 Pro, at about $0.15 per lifetime kWh against the C800 Plus's $0.28, despite identical 3,000-cycle, 5-year warranty terms on both units. The gap traces directly to the roughly $300 price difference.
Does the C800 Plus's camping-light feature matter?
It's polarizing among reviewers. Some call the built-in light pole a genuine lantern replacement that streamlined their camping kit, while others call it an unnecessary add-on that sacrifices onboard cable storage. It's a bonus feature, not a reason to choose the unit on its own.
Which one should I actually buy?
The RIVER 2 Pro, for most buyers — it's about $300 cheaper and lighter for the same 768Wh. Take the C800 Plus only if you specifically need its extra continuous output, faster solar, or quieter fan and consider that worth the premium.
Where to buy
EcoFlow RIVER 2 ProPick
$349.00
$349.00 list · direct from EcoFlow
Anker SOLIX C800 Plus
$649.00
$649.00 list · direct from Anker
Prices may vary by retailer and are subject to change.