Head-to-head test
EcoFlow RIVER 2 240 vs EcoFlow RIVER 2 Max 500
Real-world runtimes, scenario verdicts, and ownership costs compared — which wins for your use case.
Written by Wenny ZhengUpdated
Portable Power Tester, Station Arena Test Desk
EcoFlow
RIVER 2 240
1,435Power Score · Device Hub
$219.00 · direct from EcoFlow
Last checked 3 hours ago. Prices move — check before you buy.
EcoFlow
RIVER 2 Max 500
1,885Power Score · Device Hub
$329.00 · direct from EcoFlow
Last checked 3 hours ago. Prices move — check before you buy.
Spec deltas
Both carry the EcoFlow name, but they're built for different buyers. The RIVER 2 240 (243Wh, 300W) and the RIVER 2 Max 500 (499Wh, 500W) come from different product lines with different engineering priorities. The RIVER 2 Max 500 has a slight edge, but the margin is close enough that your use case should break the tie.
The RIVER 2 Max 500 holds 256Wh more than the RIVER 2 240 — about 3 hours on a fridge against 1 — a real but modest edge that shows up mainly on longer outages. For camping, tailgating, or keeping devices charged, both have the headroom, so price, weight, and longevity lead the decision instead.
Pick the RIVER 2 Max 500 if your primary use is cpap overnight. Go with the RIVER 2 240 if its specific strengths below line up better with your use. Most buyers stop at the sticker price and miss this: over a full lifespan the RIVER 2 Max 500 works out to about $0.22/kWh against the RIVER 2 240's $0.3, a gap that compounds in the RIVER 2 Max 500's favor the more you cycle it. Keep scrolling for the full breakdown. The scenario verdicts below hold a few surprises.
Bench Notes
What each unit does well, where it falls short, and the trade-offs that matter.
EcoFlow RIVER 2 240
At 300W, this unit is strictly for personal electronics (phones, laptops) and small CPAP machines. Do not expect to run kitchen appliances. At only 7.7 lbs, it is exceptionally portable. You can easily carry it one-handed to a campsite or tailgating party.
Strengths
- +Costs $110 less
- +Lighter by 5.5 lb
Trade-offs
- –No major technical downsides compared to rival.
EcoFlow RIVER 2 Max 500
At 500W, this unit is strictly for personal electronics (phones, laptops) and small CPAP machines. Do not expect to run kitchen appliances. At only 13.2 lbs, it is exceptionally portable. You can easily carry it one-handed to a campsite or tailgating party.
Strengths
- +Larger battery capacity
- +Higher AC output
- +Faster solar charging
Trade-offs
- –Substantially more expensive (+$110) than the RIVER 2 240.
Will It Power Your Gear?
Scenario math and per-appliance runtimes, modeled from the spec record.
Scenario verdicts
We ran the math on seven real-world scenarios. Here's which unit survives your actual life.
SCN-01 · 2 nights · needs 2,100Wh
Weekend Camping
Two nights off-grid with essential comfort
Neither unit
Neither unit covers this scenario's 2,100Wh: the RIVER 2 240 comes up 1,893Wh short (about 10% covered), the RIVER 2 Max 500 1,676Wh (20%). 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 covers this scenario's 1,645Wh: the RIVER 2 240 comes up 1,438Wh short (about 13% covered), the RIVER 2 Max 500 1,221Wh (26%). 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 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 2 Max 500
The RIVER 2 240 doesn't finish — 207Wh usable against the 320Wh this needs leaves it 113Wh short, about 65% of the scenario covered. The RIVER 2 Max 500 covers it with 104Wh to spare.
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 this scenario's 910Wh: the RIVER 2 240 comes up 703Wh short (about 23% covered), the RIVER 2 Max 500 486Wh (47%). 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 Laptop 60W×8h · External Monitor 30W×8h · Router + Modem 20W×8h · Phone Charger 15W×2h
SCN-05 · 4 hours · needs 670Wh
Tailgate Party
Game day power for the crew
Neither unit
The RIVER 2 240 can start the 400W peak but not hold it — 600W of surge gets it going, then the 300W continuous rating takes over, so capacity never gets a say. This is the wrong size of unit for the job rather than a close call. The RIVER 2 Max 500 doesn't have the energy either — 424Wh usable against 670Wh, 246Wh short — so neither route works.
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 2 240 comes up 4,478Wh short (about 4% covered), the RIVER 2 Max 500 4,261Wh (9%). 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
SCN-07 · an afternoon · needs 100Wh
Afternoon Off-Grid
Phones and a speaker at the park, beach, or campsite — the small-unit job description
Either unit
This is the job small stations are actually for, and both do it: the RIVER 2 240 finishes at 48% used, the RIVER 2 Max 500 at 24%. At this size the decider is what rides in the bag — 7.7 lbs for the RIVER 2 240 against 13.2 for the RIVER 2 Max 500 — and price, not the leftover watt-hours.
Battery budget usedlower = more headroom
LOAD Phone Charger (×2) 30W×2h · Bluetooth Speaker 10W×4h
The Load Test
RUNTIME = (Wh × 0.85) ÷ LOAD
None of the scenarios above exactly yours? Build it. Toggle what you'd plug in; both units are tested against the combined draw.
Essentials
Comfort & Convenience
High-Draw Appliances
Test duration
8h
Continuous draw
205W
Projected runtime
For this load: RIVER 2 Max 500 runs 2.1h vs 1h.
$329 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 0–28.3hComfort & Convenience
Makes off-grid life actually enjoyablescale 0–5.7hHigh-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
July 10, 2026
Verdict: the RIVER 2 Max 500, on Power Score margin
These two units are closely matched on individual specs, but our Power Score analysis gives the RIVER 2 Max 500 the edge with a composite score of 1,885 vs 1,435.
Overall score margin: 1,435 vs 1,885 (−31.4%)
List prices as of July 10, 2026. The links below open EcoFlow's current price.
$329.00 · direct from EcoFlow
Last checked 3 hours ago. Prices move — check before you buy.
or check the RIVER 2 240 price$219.00 list
Written by Wenny Zheng, Portable Power Tester · Station Arena Test Desk · Updated July 10, 2026
Measured Data
Benchmark scores and the full spec record, side by side.
Benchmark scores
Not rated for both units (minimum threshold unmet): 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.
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 2 240 rates 3.7/5 (22nd percentile of 24 Personal-class units), and RIVER 2 Max 500 rates 4.9/5 (91st percentile of 24 Personal-class units).
How the class ranking is computed →Test Notes & Caveats
Hidden gotchas and advantages we spotted that you won't find on the product page.
Warranty: No Difference
Both units carry the same 5-year warranty, so coverage isn't a tiebreaker here. Worth saying because the per-dollar framing can suggest otherwise: the RIVER 2 240 works out at 22.8 years of cover per $1,000 spent against the RIVER 2 Max 500's 15.2, but that spread is the price gap, not the terms.
Full record above — the Test Desk pick is the RIVER 2 Max 500.
Check RIVER 2 Max 500 price →or check the RIVER 2 240 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 2 240 is cheaper to buy, but the RIVER 2 Max 500 is cheaper to own. At $0.22/kWh over its lifetime vs $0.3/kWh, the RIVER 2 Max 500's higher cycle life and capacity make each dollar go further over the years. 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 2 240
FIXED CAPACITYFixed at 243Wh, with no expansion — so size it for your needs up front rather than planning to add capacity later.
Accepts up to 110W of solar. Limited to a single portable panel.
Limited ports. You'll likely need a power strip or splitter.
RIVER 2 Max 500
FIXED CAPACITYFixed at 499Wh, 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.
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 Max 500 gives you the larger ceiling); you can't add to either later.
The Bottom Line
The full picture comes down to this. The RIVER 2 Max 500 edges ahead on our overall analysis, but the margin is narrow enough that your specific use case should drive the decision. Review the scenario verdicts above — if the RIVER 2 240 wins in the scenarios that match your life, it's the right choice regardless of aggregate scores.
If neither the RIVER 2 240 nor the RIVER 2 Max 500 feels like the right fit, your power needs probably sit outside what these two target. If you're planning whole-home backup or running power-hungry appliances (electric heaters, window AC), you'll want a larger system in the 3,000–5,000Wh range with expansion battery support. Prices on portable power stations fluctuate frequently. Both EcoFlow discount regularly, so check the current price before committing. Prime Day and Black Friday pricing typically drops 20-30%.
Frequently Asked Questions
Answers drawn from the spec record and cited owner research.
Is the RIVER 2 Max 500 worth $110 more than the RIVER 2 240?
The short answer: yes, if you'll actually use the extra capability. The RIVER 2 Max 500 costs $110 more, but that premium buys you 256Wh more battery capacity (that's 1 extra hours of running a mini-fridge); 200W higher AC output (opening the door to more demanding appliances); 110W faster solar charging for quicker off-grid recovery. On a cost-per-watt-hour basis, you're paying $0.66/Wh vs $0.90/Wh. Factor in cycle life and the math flips: the RIVER 2 Max 500 costs $0.22/kWh over its lifetime vs $0.30/kWh. The "expensive" unit is actually cheaper to own. For regular use, we'd pay the premium.
Bottom line: should I buy the RIVER 2 240 or the RIVER 2 Max 500?
We'd pay the premium for the RIVER 2 Max 500. Yes, it costs more. The capability jump is real: you're stepping into a tier that handles appliances the base model can't start. The RIVER 2 240 is still solid if budget is the priority, but the RIVER 2 Max 500 will leave you less likely to wish you'd "gone bigger" six months from now. That regret costs more than the price difference.
Where to buy
EcoFlow RIVER 2 240
$219.00
$219.00 · direct from EcoFlow
Last checked 3 hours ago. Prices move — check before you buy.
EcoFlow RIVER 2 Max 500Pick
$329.00
$329.00 · direct from EcoFlow
Last checked 3 hours ago. Prices move — check before you buy.
Prices may vary by retailer and are subject to change.