Head-to-head test
EcoFlow RIVER 2 Max vs DJI Power 500
Same 512Wh battery, $60 apart — but the DJI Power 500 doubles the RIVER 2 Max's continuous output to 1,000W and drops the fan noise from 62dB to 25dB, a gap wide enough to change what each unit is actually for.
Written by Wenny ZhengUpdated
Portable Power Tester, Station Arena Test Desk
EcoFlow
RIVER 2 Max
2,030Power Score · Appliance Class
$289.00 list · direct from EcoFlow
DJI
Power 500
2,341Power Score · Appliance Class
$299.00 list · direct from DJI
Spec deltas
The DJI Power 500 costs $359 to the RIVER 2 Max's $299, and both hold the same 512Wh battery — but the Power 500 outputs 1,000W continuous against the RIVER 2 Max's 500W, on the identical capacity. That's not a marginal spec bump; it's double the wattage from the same-size tank.
The bigger surprise is the noise gap: 25dB for the Power 500 against 62dB for the RIVER 2 Max, a difference you'd notice from across a room. DJI also rates its cells for 4,000 cycles against EcoFlow's 3,000, and its solar input tops out at 300W against 220W — though that solar port is inert out of the box, since the Power 500 ships with only a wall plug and no panel adapter includedB4.
$60 buys a genuinely different machine here, not a nicer badge on the same one. Whether it's worth paying comes down to whether you need the extra headroom and the quiet, or whether $299 and a louder fan already covers what you actually run.
What the Numbers Reveal
Each conclusion stated first — the numbers behind it on one line, the full analysis below.
continuous output
The Power 500's 1,000W continuous rating gives it real headroom for a load that would already be pushing the RIVER 2 Max's inverter to its limit before any startup surge is even factored in — on the exact same battery size.
DJI Power 500 outputs 1,000W continuous; the RIVER 2 Max outputs 500W continuousBoth hold the same 512Wh capacity
Why it mattersAnyone running something beyond phones, laptops, and a CPAP — a mini fridge, a space heater, power tools — should default to the Power 500; the RIVER 2 Max's 500W ceiling is the tighter fit.
For anyone running a CPAP or sleeping within a few feet of the unit, fan behavior at low load matters more than the capacity both units share; the Power 500 is the one built to disappear into the background overnight.
DJI Power 500 is rated at 25dB noiseRIVER 2 Max is rated at 62dB noise under load
Why it mattersCPAP buyers and anyone powering a bedroom setup should weigh the noise gap as seriously as the price gap — it's the spec they'll actually experience every night.
Buying the Power 500 for its solar headroom means budgeting for a separate adapter purchase before that 300W rating means anything; the RIVER 2 Max's 220W port is the one that actually works with a panel on day one, spec sheet aside.
DJI Power 500's solar input is rated 300W, the highest of the twoIt ships with only a wall plug — no solar or car-charging adapters includedB4
Why it mattersBuyers planning solar-first outage recharging should either price in the adapter or default to the RIVER 2 Max, which doesn't require one.
Judged by warranty-year cost the RIVER 2 Max is cheaper to own; judged by lifetime kWh the Power 500 edges ahead by a cent. Either way the gap is close enough that price shouldn't be the deciding factor — the 500W-vs-1,000W output gap and the 37dB noise gap are.
Cost per lifetime kWh works out to $0.19 for the RIVER 2 Max and $0.18 for the Power 500Cost per warranty-year works out to $60 for the RIVER 2 Max and $72 for the Power 500
Why it mattersBuyers should stop weighing this on price and decide on output headroom and noise tolerance instead; the economics are close to a wash.
The specific dimensions that decide these two units — everything else is a tie.
PowerScore Breakdown
Selected because: A real 209-point gap driven by output headroom, cycle life, and noise — not a rounding difference.
overall power score
2,212 against 2,003 tracks what the spec sheet already shows: the Power 500 doubles continuous output on the identical battery, adds 1,000 extra cycles of rated life, and cuts noise by more than half. None of that is subtle — it's the difference between a light-duty companion battery and a unit that can actually run something with a motor in it.
The RIVER 2 Max claws back ground on price and on solar-port usability out of the box, but the score reflects hardware capability, and on hardware the Power 500 is simply the stronger inverter and the longer-lived cells for $60 more.
What the Specs Don't Tell You
Selected because: Five gotchas fire, covering noise, surge quality, UPS speed, warranty value, and cycle life — the real substance of the comparison.
rated cycles
The RIVER 2 Max's 62dB rating is its clearest weakness here, sitting well above the Power 500's 25dB — loud enough to notice clearly in a room where the Power 500 would barely register. The surge-quality gotcha also favors DJI: its inverter runs its full 1,000W surge rating as continuous output, meaning it isn't leaning on brief overhead the way a 500W-continuous, 1,000W-surge unit is.
Cycle life tips toward DJI too — 4,000 rated cycles against 3,000 works out to roughly a third more battery life before capacity fades to 80%. The RIVER 2 Max answers back on warranty-year cost, coming in cheaper per year of coverage despite the shorter cycle count, purely because of its lower sticker price.
Lifetime Value
Selected because: Ownership economics are nearly a wash, which matters for framing the decision correctly.
cost / lifetime kWh
At $0.19 per lifetime kWh for the RIVER 2 Max against $0.18 for the Power 500, the higher purchase price and the extra 1,000 rated cycles roughly cancel out — this isn't a unit that's meaningfully cheaper to run over its life, just a unit that costs more upfront for more capability per session.
Where the RIVER 2 Max actually wins on paper is cost per warranty-year: $60 against $72. That's the honest number for buyers optimizing pure ownership cost rather than output headroom or quiet.
Your Life, Your Pick
Selected because: CPAP Overnight is the one scenario both handle — worth noting given the noise gap that matters most there.
CPAP Overnight is the scenario where these units are functionally identical on paper — both use the same share of their shared 512Wh tank and finish the night with room left. But identical capacity use doesn't mean identical experience: at 25dB against 62dB, the Power 500 is the one you won't hear from the pillow.
Every other modeled scenario — Weekend Camping, the 8-Hour Blackout, Remote Workday, Tailgate Party, Van Life Daily — defeats both units by the same margin, since neither's 512Wh tank is sized for those loads regardless of output wattage. The output gap matters for what you plug in, not how long either lasts.
Strengths & trade-offs
EcoFlow RIVER 2 Max
Strengths
- +Costs $10 less
- +Lighter by 2.7 lb
Trade-offs
- –Can receive complaints about fan noise under heavy load.
- –Shorter-lived battery — rated for 3,000 charge cycles vs the Power 500's 4,000, so it wears out sooner.
DJI Power 500
Strengths
- +Higher AC output
- +Faster solar charging
- +Rated for 4,000 charge cycles — much longer battery lifespan
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 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 74% 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 2.1h. 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 0–29hComfort & Convenience
Makes off-grid life actually enjoyablescale 0–5.8hHigh-Draw Appliances
These reveal the real limitsscale 0–0.4h¹ 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 14, 2026
Verdict: the DJI Power 500
Take the Power 500 if the $60 gap doesn't matter — double the continuous wattage on the same 512Wh tank, a 4,000-cycle battery against 3,000, and a fan quiet enough to sit next to a bed at 25dB against the RIVER 2 Max's 62dB. The lifetime math even edges toward DJI, at $0.18 per lifetime kWh against $0.19. The honest catch: DJI ships the Power 500 with only a wall plug, so its class-leading 300W solar rating is unusable until you buy a separate adapter it doesn't include. If solar-first outage prep or the lower $299 price matters more than headroom and quiet, the RIVER 2 Max remains the sound, cheaper-per-warranty-year pick.
Editor-assigned confidence, based on cited owner research and spec analysis.
List prices as of July 14, 2026. The links below open EcoFlow's and DJI's current prices.
$299.00 list · direct from DJI
or check the RIVER 2 Max price$289.00 list
Written by Wenny Zheng, Portable Power Tester · Station Arena Test Desk · Updated July 14, 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 Max rates 3.9/5 (33rd percentile of 19 Compact-class units), and Power 500 rates 4.4/5 (67th 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.
62dB vs 25dB Is the Whole Story for Bedroom Use
The RIVER 2 Max is audible across a room under load; the Power 500 is close to silent at the same distance. If the unit will sit near where someone sleeps or works, this gap outweighs the price difference.
The Power 500 Runs Its Surge Rating as Continuous Output
DJI's 1,000W continuous rating matches its 1,000W surge ceiling, meaning there's no gap between what it can sustain and what it can briefly handle. The RIVER 2 Max's 500W continuous against a 1,000W surge leaves more headroom for spikes, but a lower sustained ceiling for anything that draws hard and keeps drawing.
Both Switch Fast, DJI Slightly Faster
20ms for the Power 500 against 30ms for the RIVER 2 Max — both fast enough that sensitive electronics like a router won't notice the transfer. Neither number is the deciding factor here; the noise and output gaps matter more.
4,000 Cycles vs 3,000 — About a Third More Battery Life
The Power 500's cells are rated for roughly a third more charge cycles before capacity fades to 80%, which tracks with its slightly better cost-per-lifetime-kWh despite the higher purchase price.
Full record above — the Test Desk pick is the Power 500.
Check Power 500 price →or check the RIVER 2 Max 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 Max is cheaper to buy, but the Power 500 is cheaper to own. At $0.15/kWh over its lifetime vs $0.19/kWh, the Power 500'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.
DJI
Ecosystem
New entrant (2024) — 4 power station models: Power 500, Power 1000 V2, Power 1000 Mini, Power 2000
Support
Leveraging DJI's established global support and repair center network from the drone business. Generally positive reputation inherited from drone operations, but limited power-station-specific track record.
Community
No dedicated power station community yet. Discussions happen within r/dji (~250K members, mostly drone users). Very small power-specific presence on Facebook and forums.
App experience
Rated 3.5/5 iOS and Android (DJI Home app ratings reflect entire DJI ecosystem including drones/cameras, not power-station-specific). Users report the on-device screen is more reliable than the app.
Unique strength
Runs quiet — 23-30dB published across the line, at the quiet end of the category. Fastest wall-charging speeds (~56 min for V2). 700+ battery patents from drone R&D. SDC ports for ultra-fast DJI drone charging. Premium industrial design and build quality. LFP batteries rated for 4,000+ cycles.
Worth knowing
A recent entrant to power stations, arriving long after the established players, so there is less long-term field data than for EcoFlow, Jackery or BLUETTI — though DJI brings a deep hardware track record from drones. No built-in solar charge controller (requires a separate proprietary adapter). SDC ports are proprietary to the DJI ecosystem, so their fast-charging advantage mostly benefits people who already own DJI gear. Battery expansion is available on the newer Power 2000 and Power 1000 V2, but not on the earlier Power 1000 or Power 500 — check the specific model.
Analyst note
EcoFlow and DJI are close competitors. Both have established support channels and growing ecosystems. Compare their specific warranty terms and community size for your peace of mind.
Growth path
RIVER 2 Max
FIXED CAPACITYFixed at 512Wh, 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.
Power 500
FIXED CAPACITYFixed at 512Wh, 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 Max 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 Max
Field testing on the RIVER 2 Max ran a TV, laptops, and phones through a multi-hour event with capacity to spare, on 3,000-cycle LFP cells rated for about a decade of everyday useA4. Its 60-minute X-Stream recharge is the standout speed claim in reviewsA2, backed by a simple app for remote monitoring and charge-speed controlA3.
“512Wh in a light package of about 13 lbs, lighter than some of its closest competitors that use Li-Ion chemistry.”
Sources
storagereview.com · backuppowerhub.com · gagadget.com · ecoflow.com · thecampingnerd.com · thetechnologyman.com · bestbuy.com
DJI Power 500
The Power 500's automotive-grade LFP cells are rated for the top end of the class, and reviewers found it outperformed DJI's own larger Power 1000 on efficiency testingB1B3. It ran a load well beyond its continuous rating and briefly absorbed a surge above its 1,000W ceiling without issueB3, and its light build makes it easy to carryB2. The one consistent gripe: it ships with just a wall plug, no solar or car-charging cables included, so outdoor charging requires a separate purchaseB4.
“A 512Wh LFP battery with up to 1,000W output; the automotive-grade LFP cells are rated up to 3,000-4,000 cycles for roughly a 10-year lifespan.”
Sources
dji.com · thesolarlab.com · techradar.com · views-sounds.com · t3.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
- Light weight, fast roughly-one-hour charging, and a simple capable app are the standout praise for this 512Wh unit. [RIVER 2 Max · 3 entries]
- Light, efficient LFP unit with strong real-world output and drone-pilot appeal; the caveat is minimal included accessories. [Power 500 · 3 entries]
- A2
“Fully charges in about 60 minutes via X-Stream charging — far faster than most portable power stations — with multiple charging options.”
gagadget.com / ecoflow.com — RIVER 2 Max review · 2026 · [positive]
- A3
“The EcoFlow app offers simple remote control and monitoring over WiFi and Bluetooth — view charge levels, customize settings, and adjust charging speed from a phone.”
thecampingnerd.com / ecoflow.com — RIVER 2 Max review · 2026 · [positive]
- A4
“Upgraded LFP chemistry rated for about 3,000 cycles, roughly a decade of everyday use; in field testing it powered a telescope, a 65-inch LED TV, two laptops, and phones through a 4-hour event with power to spare.”
thetechnologyman.com / bestbuy.com owner reviews — RIVER 2 Max · 2026 · [positive]
- B1
“A 512Wh LFP battery with up to 1,000W output; the automotive-grade LFP cells are rated up to 3,000-4,000 cycles for roughly a 10-year lifespan.”
dji.com / thesolarlab.com — Power 500 review · 2026 · [positive]
- B2
“Weighs only about 7.3 kg, making it easy to transport.”
dji.com / techradar.com — Power 500 review · 2026 · [positive]
- B3
“In testing it ran a 905W load and briefly handled a 1,500W surge above its 1,000W rating; reviewers found it outperformed the larger DJI Power 1000 in efficiency testing.”
thesolarlab.com / views-sounds.com — Power 500 review · 2026 · [positive]
- B4
“Reviews are positive overall, though one noted it ships with only a wall plug — no solar adapters or car-charging cables included.”
t3.com / techradar.com — Power 500 review · 2026 · [mixed]
Research compiled July 14, 2026.
Who Should Buy Which
Buy the RIVER 2 Max if you…
- →You want to recharge from solar the day you unbox it — the 220W port works with a panel immediately, no extra adapter needed.
- →$299 and a louder fan is an easy trade for you, and nothing you run needs more than 500W continuous.
Buy the Power 500 if you…
- →You're running something with real startup draw — a mini fridge, tools, a space heater — and want the 1,000W continuous headroom on the same battery size.
- →The unit will live somewhere you sleep or work quietly, and the gap between 25dB and 62dB is worth $60 to you.
If neither fits
If your real need is a two-night camping trip or an 8-hour multi-appliance blackout, both fail that job at the same 512Wh — those scenarios need roughly 2,100Wh and 1,645Wh, more than three times either unit's capacity. Step up to a 1,000Wh-plus unit instead.
The Bottom Line
This isn't a price comparison so much as a capability one: the Power 500 turns the same 512Wh battery into a 1,000W, near-silent unit for $60 more, while the RIVER 2 Max keeps the lower price and the solar port that actually works on day one.
Take the Power 500 if you'll use the extra wattage or need the quiet — and budget for a solar adapter it doesn't include. Take the RIVER 2 Max if 500W and 62dB already cover your real use case; the lifetime cost between them barely moves either way.
Frequently Asked Questions
Answers drawn from the spec record and cited owner research.
What's the real difference between the RIVER 2 Max and the DJI Power 500?
Output and noise, mainly. Both hold 512Wh, but the Power 500 runs 1,000W continuous against the RIVER 2 Max's 500W, and it's rated at 25dB against 62dB under load. DJI also rates its cells for 4,000 cycles against EcoFlow's 3,000, for $60 more.
Is the DJI Power 500 worth $60 more than the RIVER 2 Max?
If you need the extra output headroom or the quiet, yes — doubling continuous wattage on the same battery and cutting noise by more than half is a real, usable difference. If your loads stay under 500W and noise doesn't matter, the RIVER 2 Max does the same job for less.
Does the DJI Power 500 come with a solar panel adapter?
No. It ships with only a wall plug, so its 300W solar rating — the highest of the two units — isn't usable until you buy a separate adapter. The RIVER 2 Max's 220W solar port works with a panel out of the box.
Which one is quieter for CPAP or bedroom use?
The Power 500, by a wide margin — 25dB against the RIVER 2 Max's 62dB. Both cover a CPAP overnight comfortably on capacity alone, so the deciding factor for bedroom use is the noise gap, not runtime.
Which one should I actually buy?
Buy the Power 500 if you need more than 500W continuous or want the quieter unit, and don't mind sourcing your own solar adapter. Buy the RIVER 2 Max if $299 and out-of-the-box solar charging matter more than headroom, since the lifetime ownership cost between them is close to a wash either way.
Where to buy
EcoFlow RIVER 2 Max
$289.00
$289.00 list · direct from EcoFlow
DJI Power 500Pick
$299.00
$299.00 list · direct from DJI
Prices may vary by retailer and are subject to change.