Head-to-head test
EcoFlow RIVER 2 Pro vs Anker SOLIX C1000 Gen 2
The C1000 Gen 2 costs $150 more, but it's the one you can actually grow later — the RIVER 2 Pro is a sealed box you'll outgrow, while Anker's expansion batteries mean this purchase doesn't have an expiration date on capacity.
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 C1000 Gen 2
3,357Power Score · Appliance Class
$549.99 list · direct from Anker
Spec deltas
The SOLIX C1000 Gen 2 costs $150 more than the RIVER 2 Pro — $649 against $499 — and for that premium it delivers 256 more watt-hours, 1,200W more continuous output, and a switchover fast enough to be called line-interactive rather than basic standby.
The bigger difference isn't a spec at all. The C1000 Gen 2 supports Anker expansion batteries, so if your power needs grow next year, you add capacity instead of replacing the whole unit. The RIVER 2 Pro is a closed system: what you buy on day one is the ceiling for as long as you own it.
Run the lifetime math and the pricier unit is actually the better deal — $0.16 per kWh delivered against $0.22 for the RIVER 2 Pro, despite costing more upfront. The RIVER 2 Pro's case is speed to purchase and a lower sticker price, not long-term value.
What the Numbers Reveal
Each conclusion stated first — the numbers behind it on one line, the full analysis below.
The RIVER 2 Pro's lower sticker price is a one-time discount; the moment your needs outgrow 768Wh, you're buying an entire second unit, not an add-on module.
The C1000 Gen 2 supports Anker expansion batteries and is rated expandable; the RIVER 2 Pro has no expansion path at allThe C1000 Gen 2 costs $150 more upfront but $0.16 per lifetime kWh against $0.22 for the RIVER 2 Pro
Why it mattersAnyone whose power needs might grow — more camping gear, longer trips, a future partial-home backup — should treat the $150 gap as buying flexibility, not just watt-hours.
Both units can run a UPS, but only one of them is actually built to the switchover speed the term implies.
The C1000 Gen 2 switches over in 10ms, fast enough to count as line-interactive protectionThe RIVER 2 Pro switches over in 30ms, basic standby
Why it mattersAnyone running networking gear or anything that reboots on a power blip should default to the C1000 Gen 2's faster switchover.
This isn't the RIVER 2 Pro's category to lose cleanly — the C1000 Gen 2 has its own documented noise complaint at high outputB2 — but the gap still favors Anker at the top end.
Reviewers note the C1000 Gen 2's fan is nearly silent at low load (about 35dB under 200W) but ramps to around 55dB at 1,000W-plus outputB2EcoFlow's own spec sheet documents the RIVER 2 Pro's noise at up to 62dB during high-wattage charging or dischargingA2
Why it mattersAnyone planning to fast-charge or run heavy loads near a sleeping space should expect fan noise from either unit, and should lean toward the C1000 Gen 2's lower ceiling if noise is the deciding factor.
solar input
In a multi-day outage, recharge speed determines whether you're topped off by lunch or still waiting at dinner — a 600W solar ceiling compresses that wait dramatically compared to 220W.
The C1000 Gen 2 recharges via HyperFlash in roughly 49 minutes, notably faster than the prior-generation C1000's 58-80 minutesB1The RIVER 2 Pro's 220W solar input is roughly a third of the C1000 Gen 2's 600W ceiling
Why it mattersBuyers planning to lean on solar during extended outages or off-grid trips should weight the C1000 Gen 2's faster recharge heavily.
The specific dimensions that decide these two units — everything else is a tie.
PowerScore Breakdown
Selected because: C1000 Gen 2 wins the composite score by roughly 1,000 points.
overall power score
The C1000 Gen 2 outscores the RIVER 2 Pro by roughly 1,000 points on the engine's composite, driven by capacity, output, surge headroom, and switchover speed all landing in Anker's column.
The RIVER 2 Pro isn't scoring poorly because it's a bad unit — it's scoring behind because it's a smaller, slower-charging, louder-under-load unit going up against one that beats it on nearly every measured axis.
Growth Path
Selected because: The single structural difference on this page — sealed vs. expandable — deserves its own section.
solar input
The RIVER 2 Pro has one genuine weakness the C1000 Gen 2 doesn't: what you buy is the ceiling. It's a sealed box, and outgrowing 768Wh means buying an entirely new unit, not an add-on. For most casual buyers that never bites.
The C1000 Gen 2 supports Anker expansion batteries, so a power need that grows next year gets solved with a module, not a second full purchase. If you already suspect your needs will grow — more gear, longer trips, eventual home backup — that path has real dollar value baked in from day one.
What the Specs Don't Tell You
Selected because: Six cards fire, more than any other section, including UPS speed, warranty value, and cycle life.
rated cycles
Six cards fire here, more than any other pairing on this page. The expansion card flags the RIVER 2 Pro's closed system directly. The UPS card notes the C1000 Gen 2's 10ms line-interactive switchover against the RIVER 2 Pro's 30ms basic standby — a real gap for sensitive electronics. Warranty value and cycle life both come out even at 5 years, but the C1000 Gen 2's 4,000-cycle rating against 3,000 stretches its cost-per-year further.
The noise card flags the RIVER 2 Pro's documented 62dB under loadA2. The surge-ratio card favors the RIVER 2 Pro's inverter design on a relative basis, but it's the one card in this section that doesn't override the C1000 Gen 2's larger absolute surge rating.
Lifetime Value
Selected because: Pricier unit is cheaper per kWh delivered, a counterintuitive result worth surfacing directly.
cost / lifetime kWh
Sixteen cents a kilowatt-hour against twenty-two — and the C1000 Gen 2 gets there while costing $150 more upfront. That's the number that should end most sticker-shock hesitation about the higher price.
The RIVER 2 Pro's cheaper day-one price is real, but it's the only place it wins on cost. Everywhere the lifetime math runs, the C1000 Gen 2 comes out ahead.
Strengths & trade-offs
EcoFlow RIVER 2 Pro
Strengths
- +Costs $201 less
- +Lighter by 7.7 lb
Trade-offs
- –Weaker inverter (-1,200W) limits appliance compatibility.
- –Can receive complaints about fan noise under heavy load.
- –Sealed capacity — the SOLIX C1000 Gen 2 can add batteries to grow past 768Wh; this one can't.
- –Shorter-lived battery — rated for 3,000 charge cycles vs the SOLIX C1000 Gen 2's 4,000, so it wears out sooner.
Anker SOLIX C1000 Gen 2
Strengths
- +Larger battery capacity
- +Higher AC output
- +Faster solar charging
- +Rated for 4,000 charge cycles — much longer battery lifespan
Trade-offs
- –Substantially more expensive (+$201) 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
SOLIX C1000 Gen 2
Both are massively overpowered for CPAP — the SOLIX C1000 Gen 2 finishes at 37% used against the RIVER 2 Pro's 49%. At a 40W load that reserve is comfort rather than necessity, so if a CPAP is the only thing you plan to run, price and portability should count for more than capacity does.
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
SOLIX C1000 Gen 2
The RIVER 2 Pro runs out of juice. It only has 653Wh usable, but this scenario needs 670Wh. The SOLIX C1000 Gen 2 covers it and still has 13h of phone charging left over.
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
For this load: SOLIX C1000 Gen 2 runs 4.2h vs 3.2h.
$549.99 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 0–58hComfort & Convenience
Makes off-grid life actually enjoyablescale 0–11.6hHigh-Draw Appliances
These reveal the real limitsscale 0–0.9h¹ Runtime = (capacity × 0.85) ÷ appliance watts. Within each group, all bars share one time scale (the group's longest runtime), so lengths are comparable across appliances; identical runtimes collapse into a single blue/orange bar. Actual runtime varies with battery age, temperature, and simultaneous loads — see methodology.
Conclusion
July 15, 2026
Verdict: the SOLIX C1000 Gen 2, on Power Score margin
The SOLIX C1000 Gen 2 wins on nearly every spec that matters: 1,024Wh against 768Wh, 2,000W continuous against 800W, a 3,000W surge against 1,600W, and a 10ms line-interactive switchover against a basic 30ms standby. It costs $150 more up front, but at $0.16 per lifetime kWh against $0.22, it's actually cheaper to own over its life. Its biggest structural edge isn't even in the spec sheet math — it's the expansion battery ecosystem, which the sealed RIVER 2 Pro simply doesn't have. The one honest catch: fan noise draws real complaints on both sides, so neither wins outright on quiet operation. For anyone whose power needs might grow, or who wants a real UPS-grade switchover, the C1000 Gen 2 is worth the extra $150.
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.
$549.99 list · direct from Anker
or check the RIVER 2 Pro price$349.00 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, RV Living, Home Backup, Food Truck.
Full specifications
ᵈ Derived: price ÷ rated capacity. See the data behind our comparisons →
Comparison ToolAdd more power stations, side by sideOpen Tool →How these numbers are produced
Numeric verification
Every figure on this page traces to our spec database or arithmetic on it — no estimated numbers.
Owner claims
Statements about owner experience are cited to published reviews — see Sources & Research Notes below.
Runtime model
Runtime = (rated capacity × 0.85 inverter efficiency) ÷ device wattage. Solar recharge estimates assume panels deliver 70% of rated output. Cold weather, battery age, and stacked loads reduce real-world results.
Power Score
Computed from 14 published spec dimensions, weighted per use-case bench. Higher is better; a unit must meet a bench's minimum threshold to be rated.
See the full weight table and data sourcing on our methodology page →Class ranking (the star rating)
Each unit's star score is a category ranking, not customer reviews — no buyer opinions feed it. We score every station on size-independent quality (value, output, portability, endurance, ports, warranty, and more), then percentile-rank it against the other units in its capacity class, so a class-leading compact unit and a class-leading whole-home unit can both earn 5★. Here, RIVER 2 Pro rates 4.5/5 (72nd percentile of 19 Compact-class units), and SOLIX C1000 Gen 2 rates 4.9/5 (96th percentile of 24 Everyday-class units).
How the class ranking is computed →Test Notes & Caveats
Hidden gotchas and advantages we spotted that you won't find on the product page.
RIVER 2 Pro: 62dB Under Load
62dB is about as loud as a normal conversation. If you're running a CPAP or sleeping near this unit, the fan noise may be noticeable. Most people find anything above 45dB disruptive for sleep.
RIVER 2 Pro: Fixed Capacity
The RIVER 2 Pro is sealed at 768Wh — fine if that covers you, but it's the ceiling. The SOLIX C1000 Gen 2 starts at 1,024Wh and can add expansion batteries, so if your needs may climb toward partial-home backup, it has room to grow the RIVER 2 Pro doesn't.
Surge Power: Inverter Quality Indicator
The RIVER 2 Pro has a 2× surge-to-continuous ratio vs the SOLIX C1000 Gen 2's 1.5×. 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 C1000 Gen 2 may trip when starting these appliances even though its continuous wattage looks sufficient.
UPS Speed: line-interactive (<10ms) vs basic standby
The SOLIX C1000 Gen 2 switches to battery in 10ms (line-interactive (<10ms)), while the RIVER 2 Pro takes 30ms (basic standby). 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.
Warranty Value Comparison
The RIVER 2 Pro gives you 14.3 years of warranty per $1,000 spent, vs the SOLIX C1000 Gen 2's 9.1 years. That's 1.6× more coverage per dollar. An underrated factor if you're keeping this unit for years.
Battery Lifespan in Real Years
The SOLIX C1000 Gen 2 is rated for 4,000 cycles vs 3,000. In real life: at daily use, that's 11 vs 8.2 years. At weekend use (twice a week), it's 38 vs 29 years. After hitting the cycle limit, the battery doesn't die. It drops to ~80% original capacity, which is still very usable.
Full record above — the Test Desk pick is the SOLIX C1000 Gen 2.
Check SOLIX C1000 Gen 2 price →or check the RIVER 2 Pro 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 is cheaper to buy, but the SOLIX C1000 Gen 2 is cheaper to own. At $0.13/kWh over its lifetime vs $0.15/kWh, the SOLIX C1000 Gen 2'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 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 C1000 Gen 2
EXPANDABLESupports Anker expansion batteries, so you can add capacity later without replacing the base unit — useful if your needs may climb past 1,024Wh.
Accepts up to 600W of solar. Suitable for a 1-2 panel setup.
Generous port selection supports complex multi-device setups.
Expansion batteries are Anker-specific. You're investing in the Anker ecosystem.
Realistic full solar rechargeat 70% of rated panel output — see methodology
Analyst note
The RIVER 2 Pro is sealed at 768Wh, which is fine if that covers you. The SOLIX C1000 Gen 2 starts at 1,024Wh and can grow beyond it with Anker expansion batteries — real headroom the RIVER 2 Pro doesn't have if your needs climb toward partial-home backup.
What Owners Report
Patterns from published owner reports and long-term reviews — every claim cited to its source below.
EcoFlow RIVER 2 Pro
Owner-specific commentary on the RIVER 2 Pro is thin — most RIVER 2 series discussion online doesn't distinguish between the base RIVER 2, the Max, and the Pro, so only a handful of confidently-sourced entries exist. The clearest pattern is fan noise: one owner modded the internal fans, cutting into the plastic housing to fit quieter onesA1, and EcoFlow's own FAQ acknowledges noise up to 62dB during heavy charging or dischargingA2. Field reports are otherwise limited — one van-dweller confirmed it runs a CPAP overnight without issueA4, and a Facebook post asked whether sustained UPS duty shortens battery lifeA3, a question without a clear public answer.
“Will using River 2 Pro as a UPS affect battery life ...”
Sources
ctrl-alt-rees.com
Anker SOLIX C1000 Gen 2
The C1000 Gen 2's owner and reviewer coverage is stronger and more consistent. The standout praise is charging speed: HyperFlash gets it from empty to full in roughly 49 minutes, a clear step up from the original C1000's 58-80 minutesB1. Reviewers also flag its higher output as crossing a useful threshold — enough headroom to run a standard 1,500W space heaterB3. The recurring complaint is fan noise under heavy load: nearly silent below 200W, but climbing to around 55dB past 1,000W during fast charging or heavy outputB2. Multiple reviews call it the mid-size unit to beat in 2026B4, with the noise tradeoff as the clearest asterisk.
“Fast HyperFlash charging — a full recharge in roughly 49 minutes, noticeably quicker than the original C1000's ~58-80 minutes.”
Sources
thepowerpick.com · macrumors.com · outdoorgearlab.com · technerdo.com · mensjournal.com · powerstationadvisor.com
Sources & Research Notes
Every owner claim in this report is traceable to a published source. The bracketed references above resolve here.
Recurring owner themes
- 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]
- Fast charging and higher output over the original are the standout gains; fan noise under load or fast charging is the top complaint. [SOLIX C1000 Gen 2 · 3 entries]
- A1
“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
“Fast HyperFlash charging — a full recharge in roughly 49 minutes, noticeably quicker than the original C1000's ~58-80 minutes.”
thepowerpick.com / macrumors.com — Anker SOLIX C1000 Gen 2 review · 2026 · [positive]
- B2
“Fan noise is the single most common complaint — nearly silent at low load (about 35 dB under 200W), but the fans ramp up audibly during fast charging or heavy output, reaching around 55 dB at 1,000W-plus.”
outdoorgearlab.com / technerdo.com — C1000 Gen 2 review · 2026 · [negative]
- B3
“The higher continuous output crosses a useful threshold over the original — enough to run a standard 1,500W space heater with headroom to spare.”
thepowerpick.com / mensjournal.com — C1000 Gen 2 review · 2026 · [positive]
- B4
“Reviewers describe it as a refined, powerful, fast-charging update to a popular 1kWh platform, widely rated the mid-size unit to beat in 2026.”
thepowerpick.com / powerstationadvisor.com — C1000 Gen 2 review · 2026 · [positive]
Research compiled July 15, 2026.
Who Should Buy Which
Buy the RIVER 2 Pro if you…
- →Budget-first buyers who want the lowest entry price and don't expect their power needs to grow beyond 768Wh
- →Light users covering phones, a laptop, and occasional CPAP use who don't need a fast solar refill or UPS-grade switchover
Buy the SOLIX C1000 Gen 2 if you…
- →Buyers whose needs might grow — more gear, longer trips, or eventual home backup — who want an expansion path instead of a second full purchase
- →Anyone running networking gear or equipment sensitive to power gaps, who benefits from the 10ms line-interactive switchover
- →Buyers who lean on solar during outages and want the faster 600W recharge ceiling
If neither fits
Anyone needing to power a fridge for a full weekend or run a van full-time should skip both — neither clears the Weekend Camping or Van Life Daily scenario, and a larger-capacity unit built for that load is the honest answer.
The Bottom Line
The C1000 Gen 2 costs $150 more but wins on capacity, output, switchover speed, and lifetime cost per kWh, and it's the only one of these two with a real path to grow later.
The RIVER 2 Pro remains the cheaper day-one purchase for buyers who are certain their needs stop at 768Wh. Anyone less certain should pay the $150 and buy the unit that doesn't force a second purchase down the road.
Frequently Asked Questions
Answers drawn from the spec record and cited owner research.
Is the Anker SOLIX C1000 Gen 2 worth $150 more than the EcoFlow RIVER 2 Pro?
For most buyers, yes. Despite the higher upfront price, the C1000 Gen 2 actually costs less per lifetime kilowatt-hour delivered — $0.16 against $0.22 — because it holds more capacity and rates for more charge cycles. It also adds an expansion battery path the RIVER 2 Pro doesn't have.
Can I add more capacity to either of these later?
Only the SOLIX C1000 Gen 2. It supports Anker expansion batteries, so growing power needs can be solved by adding a module rather than replacing the whole unit. The RIVER 2 Pro is a sealed system — its 768Wh capacity is fixed for the life of the unit.
Which one is quieter?
Neither is quiet under heavy load. The RIVER 2 Pro is documented at up to 62dB during high-wattage charging, while the C1000 Gen 2 climbs to around 55dB past 1,000W output but stays near-silent below 200W. The C1000 Gen 2 has a lower ceiling, but both units generate real fan noise when pushed.
How fast does each recharge?
The C1000 Gen 2 charges via HyperFlash in roughly 49 minutes from the wall and accepts up to 600W of solar input. The RIVER 2 Pro's solar ceiling is 220W, meaning a full solar recharge takes considerably longer under real sun conditions.
Which is better for protecting a router or networking equipment during outages?
The C1000 Gen 2, thanks to its 10ms switchover speed, which qualifies as line-interactive protection. The RIVER 2 Pro's 30ms switchover is basic standby, fast enough for most loads but more likely to cause a brief drop on equipment sensitive to power gaps.
Where to buy
EcoFlow RIVER 2 Pro
$349.00
$349.00 list · direct from EcoFlow
Anker SOLIX C1000 Gen 2Pick
$549.99
$549.99 list · direct from Anker
Prices may vary by retailer and are subject to change.