Head-to-head test
EcoFlow DELTA 3 1000 Air vs EcoFlow RIVER 3 MAX
EcoFlow has discontinued the DELTA 3 1000 Air, and the DELTA 3 Classic is its replacement. Against the RIVER 3 MAX, the Air is the bigger battery with the bigger solar input. The MAX charges a laptop at 100W, carries three more years of warranty and is still on sale.
Full profiles: EcoFlow RIVER 3 MAX β
Looking for a different matchup? EcoFlow DELTA 3 1000 Air vs RIVER 3 MAX PLUS
Written by Ian SchneiderUpdated
Solar & Off-Grid Tester, Station Arena Test Desk
Spec deltas
EcoFlow no longer sells the DELTA 3 1000 AirA4. The replacement we point its shoppers to is the DELTA 3 Classic. So if you're here, you probably own an Air and wonder whether a RIVER 3 MAX is a sensible next step. Or you've spotted an Air on a clearance shelf next to a new RIVER 3 MAX.
These two answer different questions. The Air is a 960Wh box built around protecting a desk, with a β€10ms UPS switchover, one AC outlet and not much elseA1A2. The RIVER 3 MAX is a 572Wh unit built to travel. EcoFlow sells it as a RIVER 3 Plus with an extra battery attached.
I keep coming back to the solar side, because that's how my cabin runs. The Air takes 500W from panels, more than the RIVER 3 Plus input the MAX charges through. Truckee winter days are short, so I'd want every watt of input I could get.
What the Numbers Reveal
Each conclusion stated first β the numbers behind it on one line, the full analysis below.
continuous output
It holds 388Wh less and takes less from a panel. It does run 600W to the Air's 500W, so it would start a slightly bigger load. That's a thin reason to give up most of a battery. If I owned an Air and wanted more, I'd look at the DELTA 3 Classic, which sits in the Air's own size class.
DELTA 3 1000 Air: 960Wh, 500W continuous, 500W solar inputRIVER 3 MAX: 572Wh, 600W continuous, charging from solar through the RIVER 3 Plus's inputDELTA 3 1000 Air is discontinued; our retirement record names the DELTA 3 Classic as its replacement
Why it mattersAir owners shopping for more capacity should skip this matchup and read the Classic comparison instead.
Its fastest USB-C port puts out 18W. That's slow for a laptop, and under load it may not charge one at all. It has a single AC outlet, and its warranty runs two years to the MAX's five. The MAX charges a laptop at 100W and has three AC outlets.
DELTA 3 1000 Air: 18W USB-C, 1 AC outlet, 2-year warranty, 22 lbsRIVER 3 MAX: 100W USB-C, 3 AC outlets, 5-year warranty
Why it mattersA clearance Air still suits one job, a desk UPS that never needs more than 500W. For anything you carry or charge a laptop from, the MAX is the better buy.
The MAX's one add-on battery is already in the box β that's how it gets to 572Wh β so there's no second step that closes the distance to the Air. On both sides, what you buy is what you keep.
RIVER 3 MAX is a RIVER 3 Plus with its one extra battery already attached, and takes no further batteryDELTA 3 1000 Air is sealed at 960WhRIVER 3 MAX starts 388Wh below the Air's 960Wh
Why it mattersBuy the MAX for what it is out of the box: well covered, laptop-friendly and still on sale.
The specific dimensions that decide these two units β everything else is a tie.
What the Specs Don't Tell You
Selected because: USB-C output, solar input and warranty length split the two in opposite directions.
Two cards fire, and both go against the Air: an 18W USB-C ceiling and a 2-year warranty, where the MAX has 100W and 5 years. Solar input is where the Air pushes back.
The Air's 500W solar input is more than double the MAX's 220W. For anyone charging off-grid, that's the Air's best card.
Growth Path
Selected because: Neither expands, so the RIVER 3 MAX starts and stays 388Wh behind the Air.
solar input
Neither of these grows. The Air is sealed at 960Wh. The RIVER 3 MAX is a RIVER 3 Plus already carrying the one extra battery that platform accepts, so it takes no more and stays 388Wh behind.
So size either one for the job up front: there's no second battery to add to either later.
Your Life, Your Pick
Selected because: The Air finishes the tailgate the MAX can't; both get a CPAP through the night.
The Air finishes the 670Wh tailgate with 146Wh to spare, and the MAX comes up 184Wh short. Both get a CPAP through the night. The MAX takes that row on noise, because its maximum rating sits below the Air's best case. Neither figure is a reading at a CPAP's draw.
A remote workday nearly fits the Air, which comes up 94Wh short. A camping weekend, a blackout and a van day all need a bigger station.
Strengths & trade-offs
EcoFlow DELTA 3 1000 Air
Strengths
- +Larger battery capacity
- +Faster solar charging
Trade-offs
- βNo major technical downsides compared to rival.
EcoFlow RIVER 3 MAX
Strengths
- +Lighter by 3.9 lb
- +Higher AC output
- +Longer warranty
Trade-offs
- βNo 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 Β· 2 nights Β· needs 2,100Wh
Weekend Camping
Two nights off-grid with essential comfort
Neither unit
Neither unit covers this scenario's 2,100Wh: the DELTA 3 1000 Air comes up 1,284Wh short (about 39% covered), the RIVER 3 MAX 1,614Wh (23%). This is well outside what either unit is for; the right answer here is a larger station, not a choice between these two.
Battery budget usedlower = more headroom
LOADΒ Β Phone Charger 15WΓ6h Β· LED Lights 40WΓ8h Β· Box Fan 75WΓ14h Β· CPAP Machine 40WΓ16h
SCN-02 Β· 8 hours Β· needs 1,645Wh
8-Hour Blackout
Keep the essentials running through a night without power
Neither unit
Neither finishes a 1,645Wh outage. The Air covers about half of it and the MAX under a third. Keep the router and phones going, and size up for the fridge.
Battery budget usedlower = more headroom
LOADΒ Β Fridge 150WΓ8h Β· Router + Modem 20WΓ8h Β· LED Lights (4 bulbs) 40WΓ6h Β· Phone Charger 15WΓ3h
SCN-03 Β· 8 hours Β· needs 320Wh
CPAP Overnight
Sleep therapy without interruption β the #1 medical use case
RIVER 3 MAX
Both get through the night, and the Air finishes with far more left over. The MAX takes the row on noise. Its 30dB is EcoFlow's maximum under heavy load, while the Air's 39dB is its maker's best case, so the MAX is the quieter box. Neither figure is a reading at a CPAP's draw, so look for hands-on reports before either goes beside a pillow.
Battery budget usedlower = more headroom
LOADΒ Β CPAP Machine 40WΓ8h
SCN-04 Β· 8 hours Β· needs 910Wh
Remote Workday
Full work day off-grid without power anxiety
Neither unit
Neither covers a full 910Wh workday. The Air comes up 94Wh short, and only because of the flat 15% allowance we take for conversion losses. The MAX covers about half.
Battery budget usedlower = more headroom
LOADΒ Β Laptop 60WΓ8h Β· External Monitor 30WΓ8h Β· Router + Modem 20WΓ8h Β· Phone Charger 15WΓ2h
SCN-05 Β· 4 hours Β· needs 670Wh
Tailgate Party
Game day power for the crew
DELTA 3 1000 Air
The DELTA 3 1000 Air finishes a 670Wh tailgate with 146Wh to spare. The RIVER 3 MAX comes up 184Wh short, a little under three quarters of the way there.
Battery budget usedlower = more headroom
LOADΒ Β Blender 400WΓ0.5h Β· LED TV (55") 80WΓ4h Β· Bluetooth Speaker 15WΓ4h Β· Phone Charger (Γ3) 45WΓ2h
SCN-06 Β· 24 hours Β· needs 4,685Wh
Van Life Daily
A full day of mobile living β the ultimate endurance test
Neither unit
Neither unit covers this scenario's 4,685Wh: the DELTA 3 1000 Air comes up 3,869Wh short (about 17% covered), the RIVER 3 MAX 4,199Wh (10%). This is well outside what either unit is for; the right answer here is a larger station, not a choice between these two.
Battery budget usedlower = more headroom
LOADΒ Β Mini-Fridge 150WΓ24h Β· Laptop 60WΓ4h Β· Phone Charger 15WΓ3h Β· LED Lights 40WΓ5h Β· Fan 75WΓ8h
The Load Test
RUNTIME = (Wh Γ 0.85) Γ· 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: DELTA 3 1000 Air runs 4h vs 2.4h.
Planning for more than this? Describe your whole setup and get it sizedΒ β
Modeled from the spec record β same math as the tables below. Methodology
Runtime by appliance
Real-world runtime estimates for common appliances, modeled at 85% inverter efficiency.ΒΉ
Essentials
The basics you need runningscale 0β54.4hComfort & Convenience
Makes off-grid life actually enjoyablescale 0β10.9hHigh-Draw Appliances
These reveal the real limitsΒΉ Runtime = (capacity Γ 0.85) Γ· 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 β see methodology.
Conclusion
November 1, 2026
Verdict: the EcoFlow RIVER 3 MAX
EcoFlow has discontinued the DELTA 3 1000 Air, so the RIVER 3 MAX is the only one of these two you can buy new. It is a different kind of unit. It has a 100W USB-C port against 18W, three AC outlets to one, and a 5-year warranty against 2. Both are rated for a β€10ms UPS switchover. The Air holds more, 960Wh to 572Wh, and has the larger solar input at 500W. If capacity is what you're after, the Air's replacement, the DELTA 3 Classic, is the better place to look.
Editor-assigned confidence, based on cited owner research and spec analysis.
List prices as of November 1, 2026. The links below open EcoFlow's current price.
$319.00 Β· direct from EcoFlow
Last checked 28 days ago. Prices move β check before you buy.
Written by Ian Schneider, Solar & Off-Grid Tester Β· Station Arena Test Desk Β· Updated November 1, 2026
Black Friday Β· 26 days out
Price to beat:RIVER 3 MAX $319
We have never seen it discounted, so any real cut would be a first.
Measured Data
Benchmark scores and the full spec record, side by side.
Benchmark scores
Not rated for both units (minimum threshold unmet): Tailgating.
Full specifications
α΅ Derived: price Γ· rated capacity. See the data behind our comparisons β
Comparison ToolAdd more power stations, side by sideOpen Tool βHow these numbers are produced
Numeric verification
Every figure on this page traces to our spec database or arithmetic on it β no estimated numbers.
Owner claims
Statements about owner experience are cited to published reviews β see Sources & Research Notes below.
Runtime model
Runtime = (rated capacity Γ 0.85 inverter efficiency) Γ· 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 βClass ranking (the star rating)
Each unit's star score is a category ranking, not customer reviews β 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 5β . Here, DELTA 3 1000 Air rates 5.0/5 (99th percentile of 20 Compact-class units), and RIVER 3 MAX rates 4.3/5 (58th percentile of 20 Compact-class units).
How the class ranking is computed βTest Notes & Caveats
Hidden gotchas and advantages we spotted that you won't find on the product page.
The Air's USB-C tops out at 18W
The DELTA 3 1000 Air's fastest USB-C port outputs 18W. Most USB-C laptops want far more for full-speed charging, so a laptop on the Air charges slowly, or not at all under load. The RIVER 3 MAX's port delivers 100W.
Five years against two
EcoFlow covers the RIVER 3 MAX for five years and the DELTA 3 1000 Air for two. If you plan to keep a unit for years, that gap counts.
Full record above β the Test Desk pick is the RIVER 3 MAX.
Check RIVER 3 MAX price βOwnership Analysis
What happens after you buy β 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
β warranty ends Β· Reaching the cycle rating means ~80% capacity remains β degraded, not dead.
Analyst note
The DELTA 3 1000 Air is no longer sold, so there is no price to work its cost per kWh from, and this comparison doesn't quote one. On what you can actually buy today, the RIVER 3 MAX works out at $0.19/kWh over its rated life. If you already own the DELTA 3 1000 Air, the hardware comparison still holds: over its rated life the DELTA 3 1000 Air delivers about 2,880 kWh and the RIVER 3 MAX about 1,716 kWh. 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 β the wear horizon is identical and decides nothing here.
Growth path
DELTA 3 1000 Air
FIXED CAPACITYFixed at 960Wh, with no expansion β so size it for your needs up front rather than planning to add capacity later.
Accepts up to 500W of solar. Suitable for a 1-2 panel setup.
Limited ports. You'll likely need a power strip or splitter.
RIVER 3 MAX
FIXED CAPACITYFixed at 572Wh, with no expansion β 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 β see methodology
Analyst note
Growth only counts if you can still buy in, and the DELTA 3 1000 Air is no longer sold (EcoFlow points owners to the DELTA 3 Classic). That leaves the RIVER 3 MAX: it is sealed at 572Wh, so buy the size that covers you now. The DELTA 3 1000 Air's fixed 960Wh still matters if you already own one, but it isn't a reason to pick it over the RIVER 3 MAX.
What Owners Report
Patterns from published owner reports and long-term reviews β every claim cited to its source below.
EcoFlow DELTA 3 1000 Air
EcoFlow no longer sells the DELTA 3 1000 AirA4. Our retirement record names the DELTA 3 Classic as its replacement. While it was on sale, reviewers described it as a focused, minimalist 960Wh LFP unit at 22 lbs, with fewer ports and features than EcoFlow's bigger stationsA1.
It was built for power protection. A β€10ms UPS switchover keeps a computer, monitor and router running when the grid dropsA2. Its 500W ceiling rules out a space heater or a hair dryer, by designA3.
βA 960Wh LiFePO4 unit with a 500W inverter (800W X-Boost) weighing only 22 lbs β a focused, minimalist design with fewer ports and features.β
Sources
thesolarlab.com Β· batteryskills.com Β· backuppowerhub.com Β· matanich.com
EcoFlow RIVER 3 MAX
Coverage of the RIVER 3 MAX itself is thinner than coverage of the RIVER 3 lineB0. Reviewers praise the platform for quiet running and IP54 sealing, which means it holds up to dust and splashesB2. Its LFP cells are rated for 3,000+ cycles, roughly a decade of everyday useB3.
Reviewers also like the RIVER 3 family for its engineering and portability, though our research couldn't confirm which model that review describesB4. Some sources quote a larger capacity for this unit. That figure belongs to a bigger sibling in the RIVER 3 line; this one is 572WhB0B1.
βOffers up to 858Wh of LFP battery storage β the largest capacity in the RIVER 3 line β as a compact, portable unit.β
Sources
powerstationadvisor.com Β· ecoflow.com Β· backuppowerhub.com Β· amazon.com Β· portablepowernerd.com
Sources & Research Notes
Every owner claim in this report is traceable to a published source. The bracketed references above resolve here.
Recurring owner themes
- A focused home-office UPS unit β LFP, 10ms UPS, quiet and light β but low 500W output; now discontinued in favor of the DELTA 3. [DELTA 3 1000 Air Β· 3 entries]
- Largest RIVER 3 capacity (up to 858Wh), quiet IP54 build, and 3,000-cycle LFP are the standout points. [RIVER 3 MAX Β· 3 entries]
- A1
βA 960Wh LiFePO4 unit with a 500W inverter (800W X-Boost) weighing only 22 lbs β a focused, minimalist design with fewer ports and features.β
thesolarlab.com / batteryskills.com β DELTA 3 1000 Air review Β· 2026 Β· [mixed]
- A2
βBuilt as a power-protection device with a 10ms UPS switchover to keep a computer, monitor, and router running through outages.β
backuppowerhub.com β DELTA 3 1000 Air review Β· 2026 Β· [positive]
- A3
βWith only 500W continuous output, it won't run a space heater or hair dryer β it's built for low-to-moderate draw devices.β
backuppowerhub.com / matanich.com β DELTA 3 1000 Air review Β· 2026 Β· [mixed]
- A4
βEcoFlow no longer sells the DELTA 3 1000 Air; the closest successor is the standard DELTA 3 (1,024Wh LFP, 1,800W output, ~$549).β
backuppowerhub.com β DELTA 3 line Β· 2026 Β· [mixed]
- B1
βOffers up to 858Wh of LFP battery storage β the largest capacity in the RIVER 3 line β as a compact, portable unit.β
powerstationadvisor.com / ecoflow.com β RIVER 3 line review Β· 2026 Β· [positive]
- B2
βBuilt on the same RIVER 3 platform reviewers praise for sub-30dB whisper-quiet operation and IP54 ruggedness.β
backuppowerhub.com β RIVER 3 review Β· 2026 Β· [positive]
- B3
βLiFePO4 chemistry rated for 3,000+ cycles to 80% β roughly a decade of everyday use.β
backuppowerhub.com / amazon.com β RIVER 3 line Β· 2026 Β· [positive]
- B4
βReviewers value the RIVER 3 family for quality engineering and genuine portability for those who don't need to power a whole house.β
portablepowernerd.com β RIVER 3 review Β· 2026 Β· [positive]
Research compiled November 1, 2026.
Who Should Buy Which
Buy the DELTA 3 1000 Air if youβ¦
- βYou already own one and it sits under a desk as a UPS. It still does that job, so keep it.
- βYou're weighing a clearance unit for solar charging. Its 500W solar input and 960Wh outclass the MAX there, if a 2-year warranty and an 18W USB-C port don't bother you.
Buy the RIVER 3 MAX if youβ¦
- βYou need more than one AC outlet. The MAX has three, the Air one.
- βYou charge laptops or a camera from it. The MAX's USB-C port delivers 100W, the Air's 18W.
- βYou want a unit that's still sold new, with five years of warranty.
If neither fits
If the job is a camping weekend, an outage with a fridge or daily van power, neither is close. A weekend camp runs about 2,100Wh and the modeled blackout 1,645Wh. Look at a larger EcoFlow sized to the load.
The Bottom Line
The DELTA 3 1000 Air is discontinued, and the RIVER 3 MAX is the one of these two you can buy new. Buy it for a laptop-speed USB-C port, three AC outlets and five years of warranty.
If what you want from the Air is its battery and its solar input, the MAX won't replace them. The Air's replacement, the DELTA 3 Classic, is the comparison to read next.
Frequently Asked Questions
Answers drawn from the spec record and cited owner research.
Why does the RIVER 3 MAX hold less than the DELTA 3 1000 Air if it's named MAX?
MAX refers to its place at the top of EcoFlow's RIVER 3 sub-line. The DELTA 3 1000 Air sits in a different, larger product line. At 572Wh against the Air's 960Wh, the RIVER 3 MAX holds 388Wh less.
Can the RIVER 3 MAX add a battery to catch up with the DELTA 3 1000 Air?
No. The RIVER 3 MAX is EcoFlow's RIVER 3 Plus with an extra battery already attached, and that's the one extra battery the platform accepts, so 572Wh is its ceiling. It stays 388Wh behind the DELTA 3 1000 Air, which is sealed at 960Wh.
Which one is better for charging a laptop?
The RIVER 3 MAX. Its USB-C port delivers 100W against the DELTA 3 1000 Air's 18W, which is slow for most laptops and may not keep up under load.
Can either one handle a CPAP overnight?
Yes, both do. A CPAP overnight is about 320Wh. The DELTA 3 1000 Air uses about 39% of its usable capacity for the night and the RIVER 3 MAX about 66%. The RIVER 3 MAX is the quieter of the two on published ratings, though neither figure is a reading at a CPAP's light draw.
Is the DELTA 3 1000 Air still sold new?
No. EcoFlow has discontinued it, though remaining retailer stock may linger. The replacement we recommend is the EcoFlow DELTA 3 Classic. A unit already in hand still works as a 960Wh desk UPS with a 500W inverter.
Related comparisons
Where to buy
EcoFlow DELTA 3 1000 Air
No longer sold
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EcoFlow RIVER 3 MAXPick
$319.00
$319.00 Β· direct from EcoFlow
Last checked 28 days ago. Prices move β check before you buy.
Prices may vary by retailer and are subject to change.