Head-to-head test
EcoFlow RIVER 3 MAX vs DJI Power 500
The cheaper Power 500 runs loads up to 1,000W where the RIVER 3 MAX stops at 600W, so the EcoFlow earns its premium only for the buyer who runs 12V gear or guards a desktop PC.
Full profiles: EcoFlow RIVER 3 MAX → · DJI Power 500 →
Written by Wenny ZhengUpdated
Portable Power Tester, Station Arena Test Desk
Spec deltas
The DJI Power 500 is the cheaper of these two by $20, and it also has the bigger inverter: 1,000W continuous against the RIVER 3 MAX's 600W. Cheaper and stronger at once usually ends a comparison in the first sentence. This one gets a second.
The second sentence belongs to the EcoFlow, though not for its weight: at 18.1 lbs to the DJI's 16.1 it's the heavier of the two. It holds 60Wh more (572Wh against 512Wh) and has a 12V car socket where the Power 500 has none. The DJI is the box that runs the coffee maker. The EcoFlow is the box that runs the 12V fridge.
So decide on what you'll plug in, not on the sticker. Anything drawing between 600W and 1,000W needs the DJI. If your list is laptops, phones, lights and 12V gear, the EcoFlow's extra socket and 60Wh are worth paying a little more for; just don't expect it to be the lighter lift.
What the Numbers Reveal
Each conclusion stated first — the numbers behind it on one line, the full analysis below.
continuous output
On 512Wh, though, 1,000W is a sprint: 435Wh usable at full output lasts under half an hour. That matches how loads in that band actually get used. A pot of coffee, a blender run, a few holes drilled, all minutes rather than hours. The DJI's headline spec is sized for real use, and it comes on the cheaper box.
Power 500: 1,000W continuous outputRIVER 3 MAX: 600W continuous outputReviewers ran the Power 500 at a 905W loadB3Power 500 usable energy: 435Wh (85% of 512Wh)
Why it mattersIf a coffee maker, blender or corded tool is on your list, take the Power 500 and stop comparing.
cost / lifetime kWh
The payout is slow, though. The difference only shows up after 8.2 years of daily cycling, and at weekend use both packs outlast the 5-year warranty many times over. Cycle life doesn't decide this page. It points the same way as the price and the inverter, which leaves the EcoFlow nothing to win on long-run cost.
Power 500: 4,000 cycles at 512Wh, about 2,048 kWh over its rated lifeRIVER 3 MAX: 3,000 cycles at 572Wh, about 1,716 kWhPer lifetime kWh: $0.15 for the Power 500, $0.19 for the RIVER 3 MAXCycled daily: 11 years for the Power 500, 8.2 years for the RIVER 3 MAX
Why it mattersDaily cyclers in a van or cabin get a real bonus from the DJI; weekend users should call cycle life a wash.
weight
For car camping that's most of the kit. A 12V fridge or tire inflator plugs straight in. On the Power 500, 12V gear has to go through an AC adapter if it shipped with one, though the DJI is the lighter box to lift (16.1 lbs against 18.1). The socket is what the EcoFlow's extra $20 buys, and it's a fair trade for someone who never draws 600W.
RIVER 3 MAX: 18.1 lbs; Power 500: 16.1 lbsRIVER 3 MAX: one 12V car socket and 3 AC outletsPower 500: zero 12V car sockets and 2 AC outletsRIVER 3 MAX: 572Wh; Power 500: 512Wh
Why it mattersWeekend car campers with 12V gear should pay the difference for the EcoFlow.
solar input
Off-grid, the EcoFlow's 2.6 hours is a floor that real skies stretch toward most of a morning. The DJI does the same job in less, provided you've bought DJI's adapter, which isn't in the box and isn't priced on this page. Solar still favours the DJI. It just costs more than the sticker suggests.
Power 500: 300W solar input; RIVER 3 MAX: 220WRIVER 3 MAX full solar refill: at least 2.6 hours (572Wh / 220W)Power 500 full solar refill: about 1.7 hours (512Wh / 300W)DJI's power stations have no built-in solar charge controller; panels need a separate proprietary adapterThe Power 500 ships with only a wall plugB4
Why it mattersSolar-first buyers should still pick the Power 500 but price the adapter first; anyone charging from a wall can ignore both solar figures.
The specific dimensions that decide these two units — everything else is a tie.
Runtime: Will It Power Your Gear?
Selected because: The Power 500 holds 60Wh less but pushes it through a 1,000W inverter instead of 600W, and that ceiling decides more purchases here than capacity does.
continuous output
Sixty watt-hours of nameplate separates the two tanks, 51Wh once you take the usable figures (486 against 435), which is most of an extra hour on a 60W laptop. Useful, not decisive. The inverter is what sorts appliances into possible and impossible, and the Power 500's 1,000W covers a band the RIVER 3 MAX's 600W rating doesn't reach: drip coffee makers, blenders, corded drills. Reviewers have run it at 905WB3.
Neither is a big-load marathon box. At full output the DJI empties its usable capacity in under half an hour, and the EcoFlow at its 600W ceiling lasts under an hour. What the DJI's rating buys is the ability to run a short, hungry load at all. Check the label on the thing you care about: many full-size kettles and microwaves pull more than 1,000W, which puts them past both.
Portability & Form Factor
Selected because: 18.1 lbs against 16.1 lbs makes the DJI the lighter box; the 12V socket only the EcoFlow has is the RIVER 3 MAX's strongest argument on boxes this size.
weight
Weight goes to the DJI, narrowly. The Power 500 weighs 16.1 lbs and reviewers call it easy to transportB2; the RIVER 3 MAX weighs 18.1 lbs, 2 lbs more, because it's a RIVER 3 Plus with a second battery attached. Both are one-handed lifts out of the footwell, and on the walk from the car to a campsite you'd struggle to tell them apart.
The port layout is where the EcoFlow wins back the travel case. The EcoFlow carries a 12V car socket and three AC outlets; the Power 500 has no 12V socket and two AC outlets, though it answers with two USB-C ports to the EcoFlow's one, both rated up to 100W. If your trip runs on a 12V fridge, that socket decides it before the scale does.
What the Specs Don't Tell You
Selected because: Solar input, UPS transfer and surge headroom each cut a different way, and the DJI's solar figure depends on an adapter it doesn't ship with.
rated cycles
Solar is one of the EcoFlow's weaker numbers. At 220W of input, a full refill needs at least 2.6 hours of ideal sun, and real days give less. The Power 500 accepts 300W and does it in about 1.7 hours (512Wh / 300W). The catch on DJI's side: its power stations have no built-in solar charge controller, so panel input arrives through a separate proprietary adapter, and the box ships with a wall plug and nothing elseB4.
The other cards lean toward the EcoFlow. Its UPS transfer is rated no worse than 10ms against the DJI's 20ms, which matters mainly for a desktop PC with a fussy power supply. It also publishes 1,200W of surge, twice its continuous rating, where DJI publishes nothing above 1,000W. That gap is softer than it reads: in reviewers' testing the Power 500 briefly handled a 1,500W surgeB3. A published rating against a single bench test isn't like-for-like, so treat the surge card as a lean, not a lock.
Lifetime Value
Selected because: The cheaper unit is also rated for 1,000 more cycles, so long-run cost points the same way as the sticker.
cost / lifetime kWh
The cheaper box is the longer-lived one, which removes the usual trade-off. Rated for 4,000 cycles against 3,000, the Power 500 delivers about 2,048 kWh over its life to the EcoFlow's 1,716, despite holding less per charge. That works out to $0.15 per lifetime kWh against $0.19.
When you'd collect is another matter. Cycled daily, the EcoFlow reaches its rating at 8.2 years and the DJI at 11, and a pack at its rating still holds around 80% of its capacity. Weekend use pushes both beyond any horizon worth planning around. Lifetime value doesn't win this page for the DJI. It just declines to argue against it.
Growth Path
Selected because: Neither takes an expansion battery: the Power 500 is sealed at 512Wh and the RIVER 3 MAX already carries its one extra battery.
solar input
Neither of these grows. The Power 500 is sealed at 512Wh for life, and the RIVER 3 MAX is already a RIVER 3 Plus with its one extra battery attached, so it takes no further battery and stays at 572Wh.
So the 60Wh head start is the whole capacity difference, now and later, and the 600W inverter stays where it is, so the EcoFlow never reaches the DJI's appliance band. If 512Wh covers your list today and next year, sealed costs you nothing on either box.
Strengths & trade-offs
EcoFlow RIVER 3 MAX
Strengths
- +Larger battery capacity
Trade-offs
- –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
- +Costs $20 less
- +Lighter by 2 lb
- +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 covers this scenario's 2,100Wh: the RIVER 3 MAX comes up 1,614Wh short (about 23% covered), the Power 500 1,665Wh (21%). 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 3 MAX comes up 1,159Wh short (about 30% covered), the Power 500 1,210Wh (26%). Treat this as partial cover — enough for the essentials in it, not the whole list.
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
A CPAP is about 40W for eight hours, so both cover the night, though not twice: the Power 500 gets through it with 115Wh to spare. The only published difference is fan noise, and it can't settle this: the Power 500 is rated 25dB and the RIVER 3 MAX 30dB, but the Power 500's is its maker's best case and the RIVER 3 MAX's is EcoFlow's maximum under heavy charge and discharge, so at a 40W draw the real gap can only be narrower than it looks, and may even run the other way. Neither settles which box is quieter at a bedside. Buy whichever is cheaper or easier to carry.
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 3 MAX comes up 424Wh short (about 53% covered), the Power 500 475Wh (48%). Treat this as partial cover — enough for the essentials in it, not the whole list.
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 covers this scenario's 670Wh: the RIVER 3 MAX comes up 184Wh short (about 72% covered), the Power 500 235Wh (65%). Either gets you most of the way, so this is a scenario you plan around rather than one you should rule them out for.
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 3 MAX comes up 4,199Wh short (about 10% covered), the Power 500 4,250Wh (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
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 3 MAX runs 2.4h vs 2.1h.
$319 list · direct from EcoFlow
Planning for more than this? Describe your whole setup and get it sized →
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 0–32.4hComfort & Convenience
Makes off-grid life actually enjoyablescale 0–6.5hHigh-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
November 1, 2026
Verdict: the Power 500
Take the DJI Power 500. It costs $20 less and its inverter is rated 1,000W against the RIVER 3 MAX's 600W, so a drip coffee maker, a blender or a corded drill runs on it at full power and sits over the EcoFlow's rating; reviewers have run it at a 905W loadB3. It's also rated for 4,000 cycles to 3,000 and accepts 300W of solar to 220W, though that input needs a separate DJI adapter. The RIVER 3 MAX's case is real but narrower: 60Wh more capacity, a 12V car socket the DJI doesn't have, and a UPS transfer rated ≤10ms against ≤20ms, and it's the heavier box by 2 lbs. Pay the extra for the EcoFlow only if you run 12V gear or protect a desktop PC.
Editor-assigned confidence, based on cited owner research and spec analysis.
List prices as of November 1, 2026. The links below open EcoFlow's and DJI's current prices.
$299.00 · direct from DJI
Last checked 28 days ago. Prices move — check before you buy.
or check the RIVER 3 MAX price$319.00 list
Written by Wenny Zheng, Portable Power Tester · Station Arena Test Desk · Updated November 1, 2026
Black Friday · 26 days out
Prices to beat:RIVER 3 MAX $319Power 500 $299
We have never seen either discounted, so any real cut would be a first.
Measured Data
Benchmark scores and the full spec record, side by side.
Benchmark scores
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 3 MAX rates 4.3/5 (58th percentile of 20 Compact-class units), and Power 500 rates 4.6/5 (74th 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.
Surge Power: Inverter Quality Indicator
The RIVER 3 MAX has a 2× surge-to-continuous ratio vs the Power 500's 1×, and the higher absolute ceiling with it — 1,200W against 1,000W. At 2× it clears the 2× rule of thumb for absorbing motor startups — fridges, AC compressors and power tools briefly draw 2-3× their rated wattage. And the Power 500 publishes no surge rating above its 1,000W continuous output, so its ratio is a statement of what's documented, not a measured limit — plan its motor-starting ability at face value rather than reading it as certain to trip.
≤10ms against ≤20ms: one desk notices
The RIVER 3 MAX is rated to switch over in no more than 10ms, the Power 500 in no more than 20ms. Routers, modems, lights and most electronics ride through either. A desktop PC with a fussy power supply is the device that can tell the two classes apart, and it's the one common reason to weigh this card. Both are ratings, not lab results.
Warranty: No Difference
Both units carry the same 5-year warranty, so coverage isn't a tiebreaker here. The Power 500's figure is a maximum rather than a guarantee — it depends on buying from DJI's own store, which is where the full five years is advertised.
Battery Lifespan in Real Years
The Power 500 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% of original capacity, which is still very usable.
Full record above — the Test Desk pick is the Power 500.
Check Power 500 price →or check the RIVER 3 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 Power 500 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.
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. At the top of the range sit two whole-home paths: the TITAN line, one 5 kWh unit that grows to 30 kWh, and the DELTA Pro Ultra platform, which stacks batteries and inverters further — flagship paths, not line-wide features.
Worth knowing
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) — five power station models to date: Power 500, Power 1000 (since superseded by the V2 but still sold), Power 1000 V2, Power 1000 Mini, Power 2000. Buying a "Power 1000" listing? Check which revision it actually ships.
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 on most of the range (manufacturer best-case figures), at the quiet end of the category; our record carries no figure for the Power 1000 V2. Fast wall charging, quickest on the Power 1000 V2 at ~56 min — that figure is the V2's, not the whole line's. 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 brings the deeper catalogue and the larger community, which matters most if you plan to add panels or more EcoFlow gear later. DJI arrived in power stations in 2024 with a long hardware record from drones but less field history in this category. On boxes this size, neither reputation should outrank the 600W-versus-1,000W question.
Growth path
RIVER 3 MAX
FIXED CAPACITYFixed at 572Wh, 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 3 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 3 MAX
Field coverage of the RIVER 3 MAX is mostly at the platform level. Reviewers praise the RIVER 3 design for quiet operation and an IP54 buildA2, and rate its LFP cells at 3,000+ cycles to 80%, roughly a decade of everyday useA3. Our research flags that model-specific detail is thin, and that 858Wh, a figure some coverage attaches to this unit, belongs to a sibling rather than to this 572Wh modelA0A1.
Reviewers also credit the family with quality engineering and genuine portability for people who don't need to power a whole houseA4, though that source may describe a sibling model. What's missing is long-haul ownership of this specific unit, so treat its reliability picture as inherited from the RIVER 3 line rather than proven on this SKUA0.
“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
DJI Power 500
The Power 500's reviews centre on efficiency. In testing it ran a 905W load, briefly handled a 1,500W surge above its rating, and beat DJI's larger Power 1000 on efficiencyB3. Reviewers describe the roughly 7.3kg chassis as easy to transportB2, and the LFP cells are rated for 3,000 to 4,000 cycles, about a ten-year lifeB1.
The gripe that comes up is what's missing from the box: one review noted it ships with only a wall plug, no solar adapter and no car-charging cableB4. The coverage is review-bench testing rather than years of ownership, which fits a line DJI only entered in 2024B1B3.
“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
- Largest RIVER 3 capacity (up to 858Wh), quiet IP54 build, and 3,000-cycle LFP are the standout points. [RIVER 3 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]
- A1
“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]
- A2
“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]
- A3
“LiFePO4 chemistry rated for 3,000+ cycles to 80% — roughly a decade of everyday use.”
backuppowerhub.com / amazon.com — RIVER 3 line · 2026 · [positive]
- A4
“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]
- 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 November 1, 2026.
Who Should Buy Which
Buy the RIVER 3 MAX if you…
- →The weekend car camper running a 12V fridge or inflator: the RIVER 3 MAX has the 12V socket the Power 500 lacks, and at 18.1 lbs it still lives in the footwell without complaint.
- →The home-office buyer protecting a desktop PC, for whom a UPS transfer rated no worse than 10ms beats one rated at 20ms.
- →Anyone who wants the bigger tank of the two on day one: 572Wh against 512Wh, since neither box takes an extra battery later.
Buy the Power 500 if you…
- →Anyone with a drip coffee maker, a blender or a corded drill on the list. 1,000W of inverter covers that band, reviewers have run it at 905WB3, and it's the cheaper box besides.
- →Solar-first users with real panels who'll use 300W of input against 220W, once they've budgeted for DJI's separate adapter, since the unit ships with only a wall plugB4.
- →Daily cyclers in a cabin or van: rated for 4,000 cycles, it's still inside its rating after 11 years of daily use.
- →The buyer who parks it on a shelf for outages, where 16.1 lbs never gets lifted and the lower price and bigger inverter are all upside.
If neither fits
Planning a full camping weekend, an eight-hour household blackout or a day of van living? Close this tab. Those draw 2,100Wh, 1,645Wh and 4,685Wh, and the bigger of these two holds 572Wh. Look for a station with four-figure watt-hours, and if full-size kettles or microwaves are the point, one whose inverter clears their label rating too.
The Bottom Line
Buy the Power 500. It's the cheaper box and the one with the bigger inverter, and 1,000W against 600W is the difference between running a short, hungry appliance at full power and not running it at all. Rated for a thousand more cycles, it wins the long-run arithmetic too.
The RIVER 3 MAX earns its $20 premium for one buyer: the person who plugs in 12V gear or guards a desktop PC. If that's you, pay it, and know it's the heavier box by 2 lbs. Everyone else, take the DJI, and if the sun is part of the plan, price its solar adapter before checkout.
Frequently Asked Questions
Answers drawn from the spec record and cited owner research.
What can the DJI Power 500 run that the RIVER 3 MAX can't?
Anything drawing between 600W and 1,000W continuously, such as a drip coffee maker, a blender or a corded drill. The RIVER 3 MAX is rated for 600W and the Power 500 for 1,000W, and reviewers have run the DJI at a 905W load. Check the label first, since many full-size kettles and microwaves pull more than 1,000W and are beyond both.
Is the DJI Power 500 better than the EcoFlow RIVER 3 MAX?
For most buyers, yes. It's the cheaper of the two, runs loads up to 1,000W against 600W, accepts 300W of solar against 220W, is the lighter box (16.1 lbs against 18.1), and is rated for 4,000 cycles against 3,000. The RIVER 3 MAX is the better pick if you need a 12V car socket or want a UPS transfer rated ≤10ms.
Which is better for running a CPAP overnight?
Both cover it comfortably: a 320Wh CPAP night leaves about 166Wh spare on the RIVER 3 MAX and 115Wh on the Power 500. Our scenario row goes to the Power 500 on its quieter published noise rating, but the makers publish differently. DJI's 25dB is a best-case figure and EcoFlow's 30dB is a maximum under heavy load, so neither describes a 40W CPAP draw. Look for hands-on noise reports before either one goes beside the bed.
How long does each take to recharge from solar?
At least 2.6 hours of ideal sun for the RIVER 3 MAX (572Wh at its 220W ceiling) and about 1.7 hours for the Power 500 (512Wh at 300W). Real days stretch both. The DJI's panel input needs a separate proprietary DJI adapter, and the unit ships with only a wall plug, so budget for that before counting on its faster refill.
Can you add an extra battery to the DJI Power 500?
No. It's sealed at 512Wh; DJI offers expansion on the Power 2000 and Power 1000 V2, not this model. The RIVER 3 MAX doesn't take one either: it's already a RIVER 3 Plus with its one extra battery attached, so it stays at 572Wh.
Brand matchup
EcoFlow vs DJI: measured across every matchup →Where to buy
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EcoFlow RIVER 3 MAX
$319.00
$319.00 · direct from EcoFlow
Last checked 28 days ago. Prices move — check before you buy.
DJI Power 500Pick
$299.00
$299.00 · direct from DJI
Last checked 28 days ago. Prices move — check before you buy.
Prices may vary by retailer and are subject to change.