Head-to-head test
EcoFlow RIVER 3 MAX vs DJI Power 500
The cheaper box here is also the bigger, lighter, faster-switching one, so the whole decision collapses to a single question: does anything on your plug list draw more than 600W?
Full profiles: EcoFlow RIVER 3 MAX → · DJI Power 500 →
Written by Wenny ZhengUpdated
Portable Power Tester, Station Arena Test Desk
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$499.00 · direct from EcoFlow
Last checked 1 day ago. Prices move — check before you buy.
$299.00 · direct from DJI
Last checked 1 day ago. Prices move — check before you buy.
Spec deltas
$319 buys 572Wh from EcoFlow. $379 buys 512Wh from DJI. The cheaper box is also the bigger one, the lighter one by 5.7 lbs, and the only one that takes an expansion battery, so the interesting question isn't which is the better value. It's what DJI is charging the extra $60 for.
Watts, not energy. The Power 500's inverter is rated 1,000W against the RIVER 3 MAX's 600W, and reviewers have held it at a 905W loadB3. That's a wall rather than a slope: a load like that doesn't run slower on the EcoFlow, it doesn't start. Kettles, microwaves, hair dryers, space heaters, most induction burners, corded tools. Everything with a heating element or a motor of any size sits on one side of it.
So write down the biggest thing you plan to plug in before you compare prices. Under 600W the RIVER 3 MAX wins on price, capacity, weight, surge headroom and switchover speed all at once. Above 600W the EcoFlow isn't expensive or cheap. It's simply not in the conversation.
What the Numbers Reveal
Each conclusion stated first — the numbers behind it on one line, the full analysis below.
continuous output
Which turns this into a yes-or-no question rather than a value question. Anything drawing between 600W and 1,000W runs on the DJI and refuses to start on the EcoFlow, and stored energy can't rescue it: 572Wh behind a 600W inverter is still a 600W outlet. Below that line the EcoFlow is the better-equipped box at the lower price, and there's nothing left to weigh.
RIVER 3 MAX: 600W continuous inverter, $319Power 500: 1,000W continuous inverter, $379Reviewers held the Power 500 at a 905W loadB3RIVER 3 MAX holds 572Wh; Power 500 holds 512Wh
Why it mattersAnyone whose list tops out at a laptop, a CPAP and phone charging is paying a premium for headroom they will never touch.
rated cycles
So "it lasts longer" is only an argument if you'll still be standing there. Cycled every single day, the DJI's extra 1,000 cycles show up somewhere between year eight and year eleven. Cycled the way these actually get used, a camping weekend and a storm and a long airport delay, both cells outlive the 5-year warranty by decades and the difference never arrives at all.
RIVER 3 MAX: $319, 3,000 cycles, 572Wh, about 1,716 kWh over its lifePower 500: $379, 4,000 cycles, 512Wh, about 2,048 kWh over its lifeBoth land at $0.19 per lifetime kWhCycled daily, that's 8.2 years for the RIVER 3 MAX and 11 years for the Power 500
Why it mattersIf you're not cycling this daily for a decade, cycle life shouldn't move you. Buy on today's price and today's outlets.
solar input
Nearly three times the panel input (300W against 110W) turns a whole solar day into a morning, which is decisive off-grid and completely irrelevant if you charge from a wall. But you buy DJI's own adapter before you collect any of it, so the honest off-grid comparison isn't $319 against $379. It's $319 against $379 plus a part you haven't priced yet.
Power 500: 300W solar inputRIVER 3 MAX: 110W solar input, and a full solar refill runs 7.4 hoursThe Power 500 has no built-in solar charge controller and needs a separate proprietary adapterIt ships with only a wall plug, no solar adapter and no car cableB4
Why it mattersVan, cabin and overlanding buyers should price the DJI solar adapter before deciding. Anyone recharging from a wall or a car can ignore the 300W figure entirely.
That inverts the obvious reading of these two spec sheets. The DJI is the one that runs a big steady load for hours; the EcoFlow is the one with room for an ugly startup spike, and it's also the one that catches a power cut in 10ms rather than 20ms. A home office with a desktop PC and a small compressor is EcoFlow territory. A tool pulling most of 1,000W all afternoon is DJI's.
RIVER 3 MAX: 1,200W surge against a 600W continuous rating, twice its own ceilingPower 500: 1,000W published surge, the same as its continuous ratingRIVER 3 MAX switches over in 10ms; Power 500 in 20ms
Why it mattersBuying for a fridge or a sump pump in a blackout? The 600W headline isn't the disqualifier it looks like.
The specific dimensions that decide these two units — everything else is a tie.
Runtime: Will It Power Your Gear?
Selected because: The RIVER 3 MAX holds 60Wh more than the Power 500 but pours it through a 600W inverter instead of a 1,000W one, and that ceiling decides more purchases here than capacity ever will.
continuous output
Sixty extra watt-hours is a rounding error you'll never feel. The inverter behind them isn't. The RIVER 3 MAX pushes its 572Wh through a 600W outlet and the Power 500 pushes 512Wh through a 1,000W one, and that decides which appliances are even candidates before runtime enters the picture. Laptops, routers, CPAPs, lights, a TV, phone bricks: all of it lives comfortably below 600W, and the EcoFlow drains slightly slower because there's more in the tank.
Above that line the roles swap completely. Reviewers have held the Power 500 at 905WB3, which covers the small countertop microwave, the single induction burner, the corded drill. The EcoFlow doesn't run those loads slowly. It declines them. Work out which side of 600W your real list falls on and this section has already made your decision.
Lifetime Value
Selected because: Both units land at $0.19 per lifetime kWh, so the $60 price gap has to justify itself on something other than long-run cost.
cost / lifetime kWh
Two boxes, two prices, one cost of energy: $0.19 per lifetime kWh apiece. DJI charges $60 more and returns 332 kWh more over the life of the cells, which is the definition of a fair trade rather than a better deal. Nobody is getting rescued by value math on this page.
What's left is when you'd collect. The DJI's extra cycles pay out between year eight and year eleven of daily cycling, and if you're cycling a 512Wh box every day for eleven years you have an unusual life and should probably own something larger. Used the way these get used, both cells outlive the 5-year warranty several times over, and the only figure with a due date is the one on the price tag.
Portability & Form Factor
Selected because: 10.4 lbs against 16.1 lbs, on boxes small enough that you'll genuinely be carrying them by hand.
weight
Both are one-hand carries; only one of them still is at the far end of a parking lot. At 10.4 lbs the RIVER 3 MAX comes out of the trunk like a bag of groceries. At 16.1 lbs the Power 500 is about 55% heavier, and reviewers are right that 7.3kg moves easilyB2, right up until it's the last thing you're carrying to the campsite with a cooler already in the other hand.
The weight buys something real, in fairness. The DJI is rated 25dBA against the RIVER 3 MAX's 30dBA, and a denser chassis is part of how a machine gets quiet. If the unit lives on a closet shelf and wakes up for outages, take the quiet. If it goes in and out of a car every other weekend, take the 5.7 lbs.
Growth Path
Selected because: One of these takes an expansion battery and the other is sealed at 512Wh for life.
solar input
The Power 500 is sealed at 512Wh, and that's the honest framing of both futures, because the RIVER 3 MAX's expansion path only counts if you'd actually use it. It does exist and it does clear the DJI: the RIVER 3 MAX accepts an EcoFlow expansion battery, and reviewers put the topped-out figure at 858WhA1, more energy than the Power 500 will ever hold.
That's a genuine advantage with a narrow audience. Buyers who can feel their needs drifting upward get to buy the small box now and grow into it later. Everyone else is choosing between 572Wh and 512Wh permanently and should size for the job in front of them, because a sealed unit that covers your load is not a compromise.
What the Specs Don't Tell You
Selected because: Solar input, surge headroom and switchover speed each cut a different way, and none of them appear on the price tag.
rated cycles
The cards below pull in opposite directions, so here's the order they matter in. Solar first, and it's the EcoFlow's worst number: 110W of panel input means a full refill from the sun runs 7.4 hours, a whole day rather than a break in one. Then read DJI's asterisk before you envy its 300W, because there's no built-in charge controller in the Power 500 and that input arrives only through a separate proprietary adapter that isn't in the box.
Surge and switchover run the other way. The RIVER 3 MAX holds 1,200W for a startup spike against its 600W steady rating, twice its own ceiling, while the Power 500's published surge is simply its continuous 1,000W. It also transfers in 10ms rather than 20ms. Neither gap will decide anything for someone charging a laptop. Both decide it for someone plugging in a compressor and a desktop PC on the same circuit.
Strengths & trade-offs
EcoFlow RIVER 3 MAX
Strengths
- +Lighter by 5.7 lb
- +Larger battery capacity
Trade-offs
- –Substantially more expensive (+$140) than the Power 500.
- –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 $140 less
- +Higher AC output
- +Faster solar charging
- +Rated for 4,000 charge cycles — much longer battery lifespan
Trade-offs
- –Sealed capacity — the RIVER 3 MAX can add batteries to grow past 512Wh; this one can't.
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
Two nights of camping draws about 2,100Wh, close to four times what either of these holds. That isn't a knock on them, it's a size class: both are day boxes, good for a Saturday of phones, lights and a laptop, recharged from the car on the drive home. If you want a weekend covered without rationing, you want something in the four-figure watt-hour range.
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
Eight hours of household load wants 1,645Wh, and each of these holds roughly a third of it at 572Wh and 512Wh. Neither is your outage plan. Both are a few hours of router, laptop, lights and phone charging while you work out what to do about the rest of the evening.
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
Power 500
A 320Wh night sits comfortably inside both boxes, so the machine is fine either way and capacity stops being the question. What's left is the thing humming next to your pillow: the Power 500 is rated 25dBA against the RIVER 3 MAX's 30dBA. Quieter takes the bedside.
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
670Wh is more than either box carries, so plan on running things in shifts rather than all afternoon. The real split is what you can run at once: the Power 500's 1,000W will take a griddle or a blender that the RIVER 3 MAX's 600W inverter turns away, while the EcoFlow stretches a little further on the light stuff with 572Wh against 512Wh. Neither one closes out the party.
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.
$439 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 0–32.4hComfort & 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
August 9, 2026
Verdict: the EcoFlow RIVER 3 MAX
Take the RIVER 3 MAX at $319. It holds more energy than the Power 500 (572Wh against 512Wh), weighs 5.7 lbs less, catches a power cut in 10ms instead of 20ms, keeps 1,200W of surge above a 600W rating, and accepts an expansion battery the DJI can't take. It also costs less. The one thing it cannot do is run anything above 600W, and the Power 500's inverter is rated 1,000W with reviewers holding it at a 905W loadB3, so if a kettle, a microwave or a corded tool is on your list, buy the DJI and don't look back. For the laptop-CPAP-lights-phones load these boxes actually get bought for, the EcoFlow is better equipped and cheaper at the same time, which is rare enough to be the whole verdict.
Editor-assigned confidence, based on cited owner research and spec analysis.
List prices as of August 9, 2026. The links below open EcoFlow's and DJI's current prices.
$499.00 · direct from EcoFlow
Last checked 1 day ago. Prices move — check before you buy.
or check the Power 500 price$299.00 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): 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 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.
Solar is the RIVER 3 MAX's weak spot: 7.4 hours
110W of panel input is the worst number on our pick's sheet and the honest catch against choosing it. A full solar refill runs 7.4 hours, so one cloudy morning costs you the day. The Power 500 accepts up to 300W, nearly three times as much, and compresses the same job into a morning. The catch on that side: there's no built-in charge controller, so the 300W only arrives through a separate proprietary adapter that isn't in the box.
Power 500: what you buy is the ceiling
The Power 500 is sealed at 512Wh. DJI added battery expansion to the Power 2000 and the Power 1000 V2 but not to this model, so size it for the job you have rather than the one you might. The RIVER 3 MAX takes an EcoFlow expansion battery, which is worth something only if you'd genuinely buy one. If 512Wh covers you today and still covers you next year, sealed isn't a defect.
The 600W rating is a running limit, not a starting one
The RIVER 3 MAX holds 1,200W for a startup spike against a 600W continuous rating, twice its own ceiling, which is the signature of an inverter with margin designed in. The Power 500 publishes 1,000W of surge, identical to its continuous rating. That doesn't make it fragile, but it does mean the EcoFlow has more room for the instant a compressor or pump kicks on, even though the DJI is the one that runs the bigger load all afternoon.
10ms against 20ms: one desk notices
The RIVER 3 MAX transfers in 10ms, the Power 500 in 20ms. A CPAP, a router, a TV or a modem rides through either without blinking. A desktop PC with a marginal power supply is the machine that can tell them apart, and it's the only common reason to weigh this at all.
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. Worth saying because the per-dollar framing can suggest otherwise: the Power 500 works out at 16.7 years of cover per $1,000 spent against the RIVER 3 MAX's 11.4, but that spread is the price gap, not the terms.
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 RIVER 3 MAX.
Check RIVER 3 MAX price →or check the Power 500 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
The deepest catalogue in portable power: 12 to 15 models spanning DELTA Pro, DELTA 3 and RIVER 3, plus panels and smart home panels. Buy one EcoFlow and everything you'd want to bolt onto it later is already in the same drawer.
Support
US phone, email and chat, with genuinely polarized outcomes. Plenty of hassle-free prepaid-label replacements, alongside long waits and refurbished units sent against new claims. Buying through Costco or Amazon adds a second return path that costs nothing to have.
Community
The busiest community in the category, with a roughly 31K-member subreddit, several Facebook groups and an official forum. The answer to your odd question usually already exists somewhere.
App experience
Rated 4.6/5 iOS (~8,400 ratings) · 4.2/5 Android (~17,000 ratings)
Unique strength
X-Stream fast charging and the widest expansion ladder anyone offers, running all the way to 180kWh at the DELTA Pro Ultra X end of the range.
Worth knowing
The October 2025 DELTA Max 2000 recall for overheating is on the record, and EcoFlow floated app subscription paywalls in early 2025 before backlash paused the plan. Out of warranty, there are no parts and no service.
DJI
Ecosystem
Four power stations, all of them since 2024: Power 500, Power 1000 Mini, Power 1000 V2 and Power 2000. A short shelf, but a coherent one.
Support
DJI's global repair-centre network from the drone business, which is a real asset, with the caveat that the power-station-specific track record inside it is short.
Community
No power-station community to speak of yet. Questions land in r/dji among a quarter-million drone pilots. Expect to be an early adopter socially as well as technically.
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
Quiet is the house specialty, 23 to 30dB published across the line, alongside the fastest wall charging DJI has shipped, 700-plus battery patents out of drone R&D, and LFP cells rated past 4,000 cycles.
Worth knowing
The 3.5/5 app score covers all of DJI's gear rather than the power line, so read it loosely, and the on-device screen is the interface that matters day to day. The SDC fast-charge ports are proprietary: they pay off if you already fly DJI and do nothing if you don't.
Analyst note
EcoFlow is the safer bet for anything you intend to build on, with more models, more accessories and more people who have already had your problem. DJI is the stronger hardware company with the shorter history in this specific category, and on a 500Wh box that gap matters far less than it would on a home-backup purchase. Neither brand's reputation should outrank the 600W-versus-1,000W question.
Growth path
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.
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
The Power 500 is sealed at 512Wh, which is fine if that covers you. The RIVER 3 MAX starts at 572Wh and can grow beyond it with EcoFlow expansion batteries — though at this size expansion means longer runtimes on the same loads, not a path to home backup. More hours, not more house.
What Owners Report
Patterns from published owner reports and long-term reviews — every claim cited to its source below.
EcoFlow RIVER 3 MAX
Field material on the RIVER 3 MAX is broad at the platform level and thin at the model level. Reviewers praise the RIVER 3 design for sub-30dB operation and IP54 ruggednessA2 and rate the LFP cells at 3,000+ cycles to 80%, which they translate to roughly a decade of everyday useA3. The RIVER 3 MAX sits at the top of that line, with coverage citing up to 858Wh once expandedA1.
What's missing is long-haul time with this specific unit. Most of what exists is review-desk time with the platform and appreciation for its engineering and genuine hand-carry portabilityA2A4, not years of someone's storm seasons. Treat the reliability picture as inherited from the RIVER 3 family rather than proven on this SKU.
“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 reputation is built on efficiency rather than size. Testing has held it at a 905W load, and reviewers found it more efficient than DJI's larger Power 1000 in the same testsB3. The 7.3kg chassis is consistently described as easy to moveB2, and the automotive-grade LFP cells are rated in the 3,000 to 4,000 cycle range for roughly a ten-year lifeB1.
The recurring gripe is what's absent: one review flagged that it ships with a wall plug and nothing else, no solar adapter and no car-charging cableB4. Coverage overall is testing time rather than long-term ownership, which is what you'd expect from a line this newB1B4.
“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 August 9, 2026.
Who Should Buy Which
Buy the RIVER 3 MAX if you…
- →The person whose plug list is a laptop, a phone, a router and a few lights: you get more stored energy, 5.7 lbs less to carry, and $60 back for agreeing not to own a microwave.
- →Anyone who suspects they'll want more capacity later. This is the only one of the two with a way to add it, topping out around 858WhA1.
- →Storm-season buyers running a desktop and a compressor, who care that the transfer is 10ms and that there's 1,200W of surge above the 600W rating for the moment the motor starts.
- →Car campers counting pounds. 10.4 lbs goes in the footwell and stops being a decision.
Buy the Power 500 if you…
- →Anyone with a heating element on the list. A kettle, a small microwave, a single induction burner, a corded tool: 1,000W of inverter is the entire reason to be here, and a 905W sustained load is on the recordB3.
- →Drone pilots already inside DJI's ecosystem, where the proprietary SDC fast-charge ports actually get used instead of ignored.
- →Off-grid and van buyers with real panels on the roof. 300W of solar input against 110W changes the shape of your day, provided you budget for the separate adapter that doesn't come in the boxB4.
- →The person who sleeps beside it. 25dBA against 30dBA is a difference you notice at the bedside rather than on a spec sheet.
If neither fits
If your plan is a full camping weekend, an eight-hour blackout with household loads, or a day of van living, close this tab. Those draw 2,100Wh, 1,645Wh and 4,685Wh respectively, and the larger of these two boxes holds 572Wh. You want something in the four-figure watt-hour class, and buying either of these because it's the cheap way in mostly means buying the right one a year later anyway.
The Bottom Line
Buy the RIVER 3 MAX. It's the cheaper box and the better-specified one at the same time: more stored energy, 5.7 lbs less to lift, a faster switchover, double the surge headroom, and a way to grow past 572Wh that the sealed Power 500 doesn't have. That combination doesn't usually arrive with the lower price tag, and when it does, the burden falls on the other unit to prove the difference.
The Power 500 proves it exactly once, and it's a good proof: 1,000W of output where the EcoFlow has 600W. Appliances don't negotiate with an inverter rating. Go look at the biggest thing you plan to plug in, and if it's under 600W, take the EcoFlow and keep the difference.
Frequently Asked Questions
Answers drawn from the spec record and cited owner research.
Can the EcoFlow RIVER 3 MAX run a microwave?
No. Its inverter is rated 600W continuous, and even small countertop microwaves draw more than that. The DJI Power 500's 1,000W rating is what you'd need, and reviewers have held it at a 905W load. If a microwave is on your list, the 600W ceiling settles this comparison before price gets a vote.
Which one is cheaper to own over its lifetime?
Neither, and it's not close to being close. Both work out to $0.19 per lifetime kWh: the RIVER 3 MAX delivers about 1,716 kWh across 3,000 cycles for $319, the Power 500 about 2,048 kWh across 4,000 cycles for $379. You're paying the same rate for energy either way, so decide on today's price and on what each unit can physically run.
Is the DJI Power 500 worth $60 more than the RIVER 3 MAX?
Only for its watts. The Power 500 gives you 1,000W of output against 600W, 300W of solar input against 110W, and 1,000 more charge cycles. The RIVER 3 MAX gives you 60Wh more capacity, 5.7 lbs less weight, a 10ms switchover, double surge headroom and an expansion path. If nothing you own draws more than 600W, the EcoFlow is the better-equipped unit at the lower price.
Which is quieter for running a CPAP overnight?
The DJI Power 500, rated 25dBA against the RIVER 3 MAX's 30dBA. Both cover a 320Wh CPAP night with capacity to spare, so the decision at the bedside is fan noise, not runtime. It's the one scenario in this matchup where the DJI wins outright.
Can either of these back up a refrigerator during a power cut?
For a stretch, not for a night. Both hold roughly a third of the 1,645Wh an eight-hour household blackout draws, so they buy you hours rather than an outage. The RIVER 3 MAX's 1,200W surge, double its 600W rating, gives it more room for a compressor's startup spike than the Power 500's published 1,000W surge, which is the same as its continuous rating.
Brand matchup
EcoFlow vs DJI: measured across every matchup →Where to buy
EcoFlow RIVER 3 MAXPick
$499.00
$499.00 · direct from EcoFlow
Last checked 1 day ago. Prices move — check before you buy.
DJI Power 500
$299.00
$299.00 · direct from DJI
Last checked 1 day ago. Prices move — check before you buy.
Prices may vary by retailer and are subject to change.