Head-to-head test
EcoFlow RIVER 2 Pro vs EcoFlow RIVER 3 MAX
The Pro's 768Wh against the MAX's 572Wh is 196Wh you'll never cash at this size, which makes the $349-versus-$319 question an easy one.
Full profiles: EcoFlow RIVER 2 Pro → · EcoFlow RIVER 3 MAX →
Written by Wenny ZhengUpdated
Portable Power Tester, Station Arena Test Desk
$389.00 · direct from EcoFlow
Last checked 1 day ago. Prices move — check before you buy.
.webp)
$499.00 · direct from EcoFlow
Last checked 1 day ago. Prices move — check before you buy.
Spec deltas
Take the RIVER 3 MAX. It's the cheaper unit, it weighs 10.4 lb against the RIVER 2 Pro's 17.2 lb, it's rated 30 dBA where the Pro is rated 62 dBA under load, and it wins the one scenario out of six that either unit can actually complete.
The Pro's case is 768Wh against 572Wh, 800W continuous against 600W, and 220W of solar input against 110W. Those are real numbers and none of them is a lie. What undoes them is that the six loads we model split into one both units finish and five neither one does. The Pro doesn't clear more of the six jobs. It fails the same five, a bit further in.
Our composite has these nine points apart, 2,481 to 2,472, which is the arithmetic way of saying same class of object. When two units land that close, the tiebreaks are the things you meet every day: what it weighs when you pick it up, what it sounds like in the room, and what it costs. The MAX takes all three.
What the Numbers Reveal
Each conclusion stated first — the numbers behind it on one line, the full analysis below.
Capacity
That turns the Pro's cheaper energy into a rate you never draw on. $0.15 a lifetime kilowatt-hour against $0.19 only pays if you actually cycle the extra 196Wh, and at this size there's no job on the list reaching for it. You're taking a discount on kilowatt-hours you never take delivery of.
RIVER 2 Pro: 768Wh at $349. RIVER 3 MAX: 572Wh at $319.Five of six modeled loads come back 'neither' — Weekend Camping at 2,100Wh, 8-Hour Blackout at 1,645Wh, Remote Workday at 910Wh, Tailgate Party at 670Wh, Van Life Daily at 4,685Wh.The Pro stores energy more cheaply across its life: $0.15 per lifetime kWh against $0.19.
Why it mattersIf your loads are phones, a laptop, a CPAP and some lights, the capacity gap is a line on the spec sheet, not a difference in your evening.
Stack the 10ms switchover against the Pro's 30ms and the MAX is also the unit that rides through a wall-power flicker without your machine registering it. For anything that sits within arm's reach of a sleeping person, the whole decision collapses into two specs, and the smaller, cheaper unit owns both of them.
RIVER 2 Pro is rated 62 dBA under load; RIVER 3 MAX is rated 30 dBA.EcoFlow's own footnote concedes up to 62db when the Pro is charging or discharging at high wattageA2, and one owner cut away internal plastic to fit a quieter fan in theirs, having already done the mod on another RIVER 2A1.CPAP Overnight is the only scenario either unit completes, and the engine gives it to the MAX even though the Pro has more headroom: 49% of usable capacity against 66%.
Why it mattersAnyone putting this in a bedroom, a nursery, or beside a desk can stop comparing right here and buy the MAX.
solar input
And the bigger you build it, the worse its one genuine deficit gets. 110W already means a 7.4-hour refill on 572Wh; hang more capacity behind the same input and a full solar recharge stops fitting inside a day. Expandability only counts past 768Wh, and past 768Wh that input can't keep up with it.
RIVER 3 MAX supports EcoFlow expansion batteries; the RIVER 2 Pro is fixed at 768Wh.The MAX's base capacity is 572Wh, below the Pro's 768Wh.The MAX takes 110W of solar input against the Pro's 220W, which the engine puts at a 7.4h solar refill.
Why it mattersBuy the MAX because it's the better small unit, not because you plan to grow it. If growth is genuinely the plan, you're shopping the wrong shelf.
The specific dimensions that decide these two units — everything else is a tie.
Your Life, Your Pick
Selected because: Five of the six modeled loads come back 'neither', which settles more here than any spec gap does.
Five of six modeled loads come back the same way for both units: not enough. A 2,100Wh camping weekend, a 1,645Wh blackout, a 4,685Wh van day. Those aren't near misses, they're different weight classes. What survives the filter is a 320Wh CPAP night, and that one goes to the MAX.
The interesting row is the 670Wh tailgate, where the Pro lands at 103% of what it can usefully deliver and the MAX at 138%. The Pro is the only unit here that comes within touching distance of a job it still can't do, which is a strange thing to pay extra for. Either way you're running a cord to the truck.
What the Specs Don't Tell You
Selected because: The 62 dBA versus 30 dBA rating and the 10ms versus 30ms switchover are where this matchup is actually decided.
One of these you'll hear from the next room while it charges; the other you'll forget is plugged in. And the noise rating fires under load, which is precisely when you most want the unit near you rather than exiled to a hallway. Fast-charging in a studio apartment is a different experience on these two.
The card cutting the other way is solar, and it's the one honest strike against our pick. 110W of input puts a full refill at 7.4 hours, where the Pro pushes 220W into a 768Wh pack. On a sunny weekend nobody notices. On a grey week off-grid, that single row decides whether you're topped up by lunch or still waiting at dusk.
Portability & Form Factor
Selected because: 17.2 lb against 10.4 lb is the difference you handle every single time you move it.
weight
10.4 lb goes in one hand and stays there. 17.2 lb is the one you set down to open a door, and 6.8 lb of difference sounds academic right up until you're carrying it up from a basement or lifting it over a tailgate.
At this size that's most of what you're buying. Nobody chooses a 572Wh or 768Wh battery to run a house. They choose it to move, and one of these moves considerably easier.
Growth Path
Selected because: One of these expands and the other is fixed at 768Wh, and it matters less than the spec column implies.
solar input
The MAX's upgrade path opens by buying back ground the Pro already covers. Its base is 572Wh, the Pro's fixed ceiling is 768Wh, so the first expansion battery goes largely toward catching up rather than getting ahead. It only becomes a genuine advantage once you'd push past 768Wh.
That isn't a reason to take the Pro. It's a reason to buy whichever of these you want as a finished object and stop there. Fixed capacity isn't a flaw when it's fixed above the rival's starting line.
Lifetime Value
Selected because: The Pro's strongest argument lives in this column: it stores energy more cheaply per lifetime kilowatt-hour.
cost / lifetime kWh
The Pro's energy is cheaper for the same reason a bigger jug is cheaper per gallon. It isn't outlasting anything: both units are 3,000-cycle LFP, both work out to 8.2 years of daily cycling, both carry five years of warranty. The Pro simply holds more per cycle, so the lifetime bill divides further.
Spread across the warranty it comes to $70 a year against $64. Six dollars, five times over, which is the price gap wearing a different hat. Six dollars a year is not a thing you will ever feel. 6.8 lb in your hands is.
Strengths & trade-offs
EcoFlow RIVER 2 Pro
Strengths
- +Costs $90 less
- +Larger battery capacity
- +Higher AC output
- +Faster solar charging
Trade-offs
- –Can receive complaints about fan noise under heavy load.
EcoFlow RIVER 3 MAX
Strengths
- +Lighter by 6.8 lb
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 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 covers this scenario's 2,100Wh: the RIVER 2 Pro comes up 1,447Wh short (about 31% covered), the RIVER 3 MAX 1,614Wh (23%). This is well outside what either unit is for; the right answer here is a larger station, not a choice between these two.
Battery budget usedlower = more headroom
LOAD Phone Charger 15W×6h · LED Lights 40W×8h · Box Fan 75W×14h · CPAP Machine 40W×16h
SCN-02 · 8 hours · needs 1,645Wh
8-Hour Blackout
Keep the essentials running through a night without power
Neither unit
Neither unit finishes this. The load is 1,645Wh; the Pro reaches 252% of what it can usefully deliver, the MAX 338%. Both will start everything you plug in and both will quit partway through the evening, so the outage question gets answered a size class up, not by picking between these two.
Battery budget usedlower = more headroom
LOAD Fridge 150W×8h · Router + Modem 20W×8h · LED Lights (4 bulbs) 40W×6h · Phone Charger 15W×3h
SCN-03 · 8 hours · needs 320Wh
CPAP Overnight
Sleep therapy without interruption — the #1 medical use case
RIVER 3 MAX
The RIVER 3 MAX takes this one, and not on capacity — the Pro finishes the 320Wh night with more in reserve, at 49% of usable against 66%. The MAX wins because it's the quieter unit and it switches over in 10ms against 30ms. Next to a pillow, that's the whole decision.
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 covers a full 910Wh workday. The Pro comes to 139% of its usable reserve and the MAX to 187%, so the Pro buys you more of the afternoon and the same walk to the wall socket. Fine as a desk UPS; not a substitute for a plug.
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, and this is the closest either unit comes to a job it can't quite do. The Pro lands at 103% of usable against the 670Wh load, the MAX at 138%. Being short by a percentage point is still short. Plan on a second battery or a truck outlet whichever one you bought.
Battery budget usedlower = more headroom
LOAD Blender 400W×0.5h · LED TV (55") 80W×4h · Bluetooth Speaker 15W×4h · Phone Charger (×3) 45W×2h
SCN-06 · 24 hours · needs 4,685Wh
Van Life Daily
A full day of mobile living — the ultimate endurance test
Neither unit
Neither unit covers this scenario's 4,685Wh: the RIVER 2 Pro comes up 4,032Wh short (about 14% covered), the RIVER 3 MAX 4,199Wh (10%). This is well outside what either unit is for; the right answer here is a larger station, not a choice between these two.
Battery budget usedlower = more headroom
LOAD Mini-Fridge 150W×24h · Laptop 60W×4h · Phone Charger 15W×3h · LED Lights 40W×5h · Fan 75W×8h
The Load Test
RUNTIME = (Wh × 0.85) ÷ LOAD
None of the scenarios above exactly yours? Build it. Toggle what you'd plug in; both units are tested against the combined draw.
Essentials
Comfort & Convenience
High-Draw Appliances
Test duration
8h
Continuous draw
205W
Projected runtime
For this load: RIVER 2 Pro runs 3.2h vs 2.4h.
$349 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 0–43.5hComfort & Convenience
Makes off-grid life actually enjoyablescale 0–8.7hHigh-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
August 9, 2026
Verdict: the EcoFlow RIVER 3 MAX
Take the RIVER 3 MAX at $319. It gives up 196Wh (768Wh down to 572Wh) and half the solar input (220W down to 110W), and neither loss changes what the unit can finish: five of the six modeled loads defeat both units, and the sixth, a 320Wh CPAP night, goes to the MAX. What comes back the other way is a box you carry in one hand at 10.4 lb, a 30 dBA noise rating against 62 dBA under load, and a 10ms switchover against 30ms. Buy the Pro instead if panels are your main way of putting energy back in, because 220W against 110W is the one gap on this page that lighter and quieter can't close, or if you need more than 600W continuous.
Editor-assigned confidence, based on cited owner research and spec analysis.
List prices as of August 9, 2026. The links below open EcoFlow's current price.
$499.00 · direct from EcoFlow
Last checked 1 day ago. Prices move — check before you buy.
or check the RIVER 2 Pro price$389.00 list
Written by Wenny Zheng, Portable Power Tester · Station Arena Test Desk · Updated August 9, 2026
Measured Data
Benchmark scores and the full spec record, side by side.
Benchmark scores
Not rated for both units (minimum threshold unmet): UPS, Solar Generator.
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 4.7/5 (84th percentile of 20 Compact-class units), and RIVER 3 MAX rates 4.3/5 (58th percentile of 20 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.
RIVER 2 Pro: 62dB Is a Load Rating, Not an Idle One
The Pro reaches 62 dBA when it's working hard, which means charging fast or discharging fast. Trickle a phone off it and you may never hear the fan. Refill it at speed in a studio apartment and you'll hear little else. The RIVER 3 MAX is rated 30 dBA and simply never has this conversation with you.
RIVER 3 MAX: 110W In Is the Honest Catch
This is the one row that argues against our pick. 110W of solar input puts a full refill at 7.4 hours, where the RIVER 2 Pro pushes 220W into a 768Wh pack. On a sunny weekend nobody notices. Off-grid in grey weather, it's the spec that decides whether you're topped up by lunch or still waiting at dusk.
RIVER 2 Pro: Fixed at 768Wh, Which Is Above Where the MAX Starts
Fixed capacity reads like a knock and isn't much of one here. The Pro's ceiling out of the box is 768Wh; the RIVER 3 MAX's floor is 572Wh, and its first expansion battery goes mostly toward closing that gap. Expandability only turns into a real advantage past 768Wh, and if that's where you're headed, both of these are the wrong purchase.
10ms vs 30ms: The Row That Decides a Desk
Both units carry a load through a wall-power dropout. The RIVER 3 MAX does it in 10ms, the RIVER 2 Pro in 30ms. For a lamp that's academic. For a desktop, a router, or a CPAP, the faster changeover is the difference between a flicker nothing notices and one something might.
Warranty: A Dead Heat
Five years and 3,000 cycles on both, from the same manufacturer, so this column decides nothing at all. The only figure that moves is cost per warranty year: $70 for the Pro against $64 for the MAX. Six dollars a year, five times over, is just the price gap paid in installments.
Full record above — the Test Desk pick is the RIVER 3 MAX.
Check RIVER 3 MAX 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 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. 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.
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.
RIVER 3 MAX
EXPANDABLESupports EcoFlow expansion batteries, so you can add capacity later without replacing the base unit — useful if your needs may climb past 572Wh.
Accepts up to 110W 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.
Realistic full solar rechargeat 70% of rated panel output — see methodology
Analyst note
Don't read the RIVER 3 MAX's expandability as a straight win here: it starts at 572Wh, below the RIVER 2 Pro's 768Wh, so a first expansion battery largely buys back capacity the RIVER 2 Pro already includes. It only pulls ahead if you'd grow past 768Wh — short of that, the RIVER 2 Pro'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 2 Pro
The field record on the RIVER 2 Pro specifically is thin — four confidently model-matched entries, with most of the RIVER 2 chatter online blurring the Pro together with the base and Max unitsA1A2A3A4. What survived that filter is consistent about exactly one thing: the fan. EcoFlow's own footnote concedes up to 62db when the unit charges or discharges at high wattageA2, and at least one owner went as far as cutting away internal plastic to fit a quieter fan, having already done the same mod on another RIVER 2A1. When the manufacturer and the modders agree, believe them.
The other two entries are questions rather than verdicts, which is its own kind of signal: one owner asking whether running the Pro as a UPS shortens battery lifeA3, and a van-dwelling CPAP user working out DC-DC cabling for an overnight runA4. Those are two of the main jobs people buy this unit for, and both are still being figured out in public rather than settled.
“Will using River 2 Pro as a UPS affect battery life ...”
Sources
ctrl-alt-rees.com
EcoFlow RIVER 3 MAX
There is very little long-term owner data on the RIVER 3 MAX; what exists is reviewer coverage of the RIVER 3 platform rather than of this specific unitB1B2B3B4. Reviewers place it at the top of the RIVER 3 lineB1 and consistently credit the platform for how quietly it runs and for its IP54 sealingB2B4, which lines up with its noise rating instead of contradicting it. That's a rare case of the marketing and the measurement pointing the same direction.
The 3,000-cycle LFP figure is repeated across that coverage as roughly a decade of everyday useB3, while the engine puts it at 8.2 years of daily cycling. Treat the decade as the optimistic end of the same number, not as a second, independent claim.
“Offers up to 858Wh of LFP battery storage — the largest capacity in the RIVER 3 line — as a compact, portable unit.”
Sources
powerstationadvisor.com · ecoflow.com · backuppowerhub.com · amazon.com · portablepowernerd.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]
- Largest RIVER 3 capacity (up to 858Wh), quiet IP54 build, and 3,000-cycle LFP are the standout points. [RIVER 3 MAX · 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
“Offers up to 858Wh of LFP battery storage — the largest capacity in the RIVER 3 line — as a compact, portable unit.”
powerstationadvisor.com / ecoflow.com — RIVER 3 line review · 2026 · [positive]
- B2
“Built on the same RIVER 3 platform reviewers praise for sub-30dB whisper-quiet operation and IP54 ruggedness.”
backuppowerhub.com — RIVER 3 review · 2026 · [positive]
- B3
“LiFePO4 chemistry rated for 3,000+ cycles to 80% — roughly a decade of everyday use.”
backuppowerhub.com / amazon.com — RIVER 3 line · 2026 · [positive]
- B4
“Reviewers value the RIVER 3 family for quality engineering and genuine portability for those who don't need to power a whole house.”
portablepowernerd.com — RIVER 3 review · 2026 · [positive]
Research compiled August 9, 2026.
Who Should Buy Which
Buy the RIVER 2 Pro if you…
- →You refill from panels more often than from a wall socket. 220W of solar input against 110W is the one gap here that no amount of lighter-and-quieter closes, and it compounds across every day of a trip.
- →You need more than 600W continuous or more than 1,200W of surge. The Pro's 800W and 1,600W are the real reason to accept the extra weight — just know that at 800W a 768Wh pack is under an hour of runtime, so it's a burst rating, not a working one.
- →It's going to live in a truck bed, a garage, or a job site, where 62 dBA under load is the quietest thing in the building.
Buy the RIVER 3 MAX if you…
- →It's going next to a bed. The 320Wh CPAP night is the only scenario either unit finishes, and the MAX wins it on a quiet rating and a 10ms switchover rather than on capacity.
- →You'll actually carry it. 10.4 lb is a one-handed grab off a shelf; 17.2 lb is a decision you make first.
- →It's backing up a desk. 10ms against 30ms is the difference between a dropout your machine ignores and one it might not.
- →You want the cheaper of two units this closely matched, and you'd rather put the difference toward a panel.
If neither fits
Anyone sizing for a real outage or for life on the road should close this tab. The 8-Hour Blackout load is 1,645Wh and the van day is 4,685Wh; against those the Pro runs to 252% and 718% of what it can usefully deliver, the MAX to 338% and 964%. That isn't a unit choice, it's a class error. Go look at the next size class up, where expansion batteries and multi-day fridge runtimes actually live, and come back once you've priced keeping food cold for three days.
The Bottom Line
Take the RIVER 3 MAX. The Pro's extra 196Wh is the only argument for spending more, and across six modeled loads it never converts into a single additional job — it just fails the same five a little later. Everything the MAX wins on is something you meet daily: the weight in your hand, the fan in the room, the changeover behind your desk.
The one honest reason to walk the other way is sunlight. If panels are how this thing gets refilled, 220W against 110W compounds over every day of a trip and the Pro earns its weight. Everyone else: buy the lighter one, keep the difference, and enjoy not hearing it.
Frequently Asked Questions
Answers drawn from the spec record and cited owner research.
Is the RIVER 3 MAX actually better than the RIVER 2 Pro, or just newer?
Better for most people choosing between the two, though not across the board. The MAX is lighter at 10.4 lb, quieter, faster to switch over at 10ms, and cheaper. The Pro holds 768Wh to the MAX's 572Wh, pushes 800W to its 600W, and takes twice the solar input at 220W. Where the Pro wins, it wins on numbers you use occasionally; where the MAX wins, it wins on things you handle every time you touch it.
Which one is quieter for a bedroom or a CPAP?
The RIVER 3 MAX, and it isn't close: 30 dBA against 62 dBA under load. That gap is why the engine hands it the 320Wh CPAP scenario even though the Pro ends that night with more capacity left over, using 49% of its usable reserve against the MAX's 66%. Add the 10ms switchover against 30ms and it's the obvious bedside unit.
Can either of these run my house during a blackout?
No. The 8-Hour Blackout load we model is 1,645Wh, and the RIVER 2 Pro reaches 252% of what it can usefully deliver while the RIVER 3 MAX reaches 338%. Both will start the loads; neither sustains them. This size class is for a laptop, phones, a router and a CPAP. House backup is a different purchase entirely.
Is the RIVER 3 MAX's expandability worth paying for?
Not as an upgrade plan. Its base is 572Wh against the Pro's fixed 768Wh, so the first expansion battery mostly buys back capacity the Pro already includes, and it only pulls ahead once you'd go beyond 768Wh. Its 110W solar input already means a 7.4-hour refill, and that gets worse with more capacity sitting behind it. Take the MAX for what it is, not for what you might bolt onto it later.
Which one is cheaper to own over the long run?
The RIVER 2 Pro, by a margin nobody will feel. Both are 3,000-cycle LFP with five-year warranties and both work out to 8.2 years of daily cycling, so the difference is tank size rather than staying power. The Pro holds more per cycle, which puts its lifetime energy at $0.15 per kWh against the MAX's $0.19. That's a real difference and a small one.
Where to buy
EcoFlow RIVER 2 Pro
$389.00
$389.00 · direct from EcoFlow
Last checked 1 day ago. Prices move — check before you buy.
EcoFlow RIVER 3 MAXPick
$499.00
$499.00 · direct from EcoFlow
Last checked 1 day ago. Prices move — check before you buy.
Prices may vary by retailer and are subject to change.