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Head-to-head test

EcoFlow DELTA 3 vs EcoFlow RIVER 3 PLUS

Same brand, same cells, same five-year warranty, and two very different jobs. The DELTA 3 carries a CPAP night or a tailgate. The RIVER 3 Plus carries phones and a speaker for an afternoon, and weighs about as much as a bag of groceries.

Full profiles: EcoFlow DELTA 3 β†’ Β· EcoFlow RIVER 3 PLUS β†’

Looking for a different matchup? EcoFlow DELTA 3 vs RIVER 3

Written by Wenny ZhengUpdated

Portable Power Tester, Station Arena Test Desk

Stack these against 100+ rivals
MethodologyReader-supported β€” we may earn from links (details)

Spec deltas

Capacity
1,024Wh
286Wh
Output
1,800W
600W
Weight
27 lb
10.4 lb
Typical price
$629
$259
Cost / Wh
$0.61
$0.91
Cycle life
4,000
3,000
Solar input
500W
220W
01

The DELTA 3 costs $370 more than the RIVER 3 Plus. For that it holds about three and a half times the battery, 1,024Wh against 286Wh, and runs three times the output.

A lot else is shared. Same brand, same LiFePO4 chemistry, which is the long-lived lithium type most stations now use. Same five-year warranty. Both have a 100W USB-C port, so my Sony camera would charge at full speed off either one.

Where they part is weight and job. The RIVER 3 Plus weighs 10.4 lb. The DELTA 3 weighs 27. I'd carry the RIVER up the Dipsea steps without a second thought. The DELTA 3 is the one I'd leave in the back of the Outback and walk back to.

02

What the Numbers Reveal

Each conclusion stated first β€” the numbers behind it on one line, the full analysis below.

F1

Phones and a speaker across an afternoon use well under half the RIVER's battery. A CPAP night is a different size of job, and the RIVER runs out about three quarters of the way through. The DELTA 3 finishes both the CPAP night and the tailgate with room left.

CPAP Overnight needs 320Wh: DELTA 3 uses 37% and clears it, RIVER 3 Plus covers about 76%Tailgate Party needs 670Wh: DELTA 3 uses 77% and clears it, RIVER 3 Plus covers about 36%Afternoon Off-Grid needs 100Wh: both clear it, RIVER 3 Plus at 41% used

Why it mattersIf anything you plan to run lasts all night, the DELTA 3 is the one of these two that gets you to morning.

F2

cost / lifetime kWh

A cycle is one full drain and refill. Spread each price over all the energy its cells are rated to deliver, and the DELTA 3 comes to $0.15 per kWh against $0.30. The RIVER's premium buys 16.6 lb off your back.

DELTA 3: $0.15 per lifetime kWh, 4,000 cyclesRIVER 3 Plus: $0.30 per lifetime kWh, 3,000 cyclesRIVER 3 Plus weighs 10.4 lbs against the DELTA 3's 27 lbs

Why it mattersIf you carry it often, that premium is fair. If it lives in a closet, it isn't.

F3

solar input

Solar input is the most panel power a station will accept. The DELTA 3 takes 500W against the RIVER's 220W. So if either one grows with extra batteries, the DELTA 3 has the faster way to fill them from the sun.

DELTA 3: 500W solar input, expandableRIVER 3 Plus: 220W solar input, expandable

Why it mattersIf you plan to grow into a solar setup, start with the DELTA 3.

The specific dimensions that decide these two units β€” everything else is a tie.

Your Life, Your Pick

Selected because: Seven jobs run on this page, and each unit wins the ones that match its size.

Seven jobs run on this page. The RIVER 3 Plus has one that fits it, an afternoon of phones and a speaker, and it finishes with more than half its battery left. The DELTA 3 barely notices that job.

The DELTA 3 wins the CPAP night and the tailgate, two jobs the RIVER can't finish. The desk day is close for the DELTA 3 and out of reach for the RIVER. A weekend away, an 8-hour blackout and a day of van life are past both. For those I'd look at a bigger station entirely.

Portability & Form Factor

Selected because: 16.6 lb is the real reason anyone picks the smaller one.

weight

The RIVER 3 Plus weighs 10.4 lb and the DELTA 3 weighs 27. One goes in a daypack with the snacks. The other is a two-hand carry from the car and back.

The DELTA 3 does give you more to plug into. It has six AC outlets to the RIVER's three. On a trailhead tailgate that might matter. On a solo hike it won't.

Lifetime Value

Selected because: The bigger battery is the cheaper one per lifetime kWh.

cost / lifetime kWh

Spread over every kilowatt-hour its cells are rated to deliver, the DELTA 3 costs $0.15 per kWh and the RIVER 3 Plus costs $0.30. The bigger battery is the cheaper one to run.

That only counts if you use the energy. Someone who charges a camera and a phone each weekend will never get near either unit's lifetime total.

Growth Path

Selected because: Both expand, and the solar ceiling decides which grows better.

solar input

Both take EcoFlow's add-on batteries, so neither is stuck at its starting size. The difference is how fast each can refill from panels.

The DELTA 3 takes up to 500W of solar. The RIVER 3 Plus takes 220W. Add a battery to either and the DELTA 3 still has the bigger door for sunlight to come in.

Strengths & trade-offs

EcoFlow DELTA 3

Strengths

  • +Larger battery capacity
  • +Higher AC output
  • +Faster solar charging
  • +Rated for 4,000 charge cycles β€” much longer battery lifespan

Trade-offs

  • –Substantially more expensive (+$370) than the RIVER 3 PLUS.
  • –Significantly heavier (+16.6 lbs), making it harder to move.

EcoFlow RIVER 3 PLUS

Strengths

  • +Costs $370 less
  • +Lighter by 16.6 lb

Trade-offs

  • –Weaker inverter (-1,200W) limits appliance compatibility.
  • –Shorter-lived battery β€” rated for 3,000 charge cycles vs the DELTA 3's 4,000, so it wears out sooner.
03

Will It Power Your Gear?

Scenario math and per-appliance runtimes, modeled from the spec record.

Scenario verdicts

We ran the math on seven real-world scenarios. Here's which unit survives your actual life.

SCN-01 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 comes up 1,230Wh short (about 41% covered), the RIVER 3 PLUS 1,857Wh (12%). This is well outside what either unit is for; the right answer here is a larger station, not a choice between these two.

Camping power station guide β†’

Battery budget usedlower = more headroom

LOADΒ Β Phone Charger 15WΓ—6h Β· LED Lights 40WΓ—8h Β· Box Fan 75WΓ—14h Β· CPAP Machine 40WΓ—16h

SCN-02 Β· 8 hours Β· 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 DELTA 3 comes up 775Wh short (about 53% covered), the RIVER 3 PLUS 1,402Wh (15%). This is well outside what either unit is for; the right answer here is a larger station, not a choice between these two.

Emergency blackout power guide β†’

Battery budget usedlower = more headroom

LOADΒ Β Fridge 150WΓ—8h Β· Router + Modem 20WΓ—8h Β· LED Lights (4 bulbs) 40WΓ—6h Β· Phone Charger 15WΓ—3h

SCN-03 Β· 8 hours Β· needs 320Wh

CPAP Overnight

Sleep therapy without interruption β€” the #1 medical use case

DELTA 3

The DELTA 3 covers the night using 37% of its usable capacity. The RIVER 3 Plus runs out about three quarters of the way through. If a CPAP runs all night, this one isn't close.

Battery budget usedlower = more headroom

LOADΒ Β CPAP Machine 40WΓ—8h

SCN-04 Β· 8 hours Β· needs 910Wh

Remote Workday

Full work day off-grid without power anxiety

Neither unit

This scenario needs 910Wh and neither unit quite finishes it. The DELTA 3 lands within 5% of it β€” close enough that trimming one appliance, or accepting a shorter evening, gets you there on the day.

UPS & desk backup guide β†’

Battery budget usedlower = more headroom

LOADΒ Β Laptop 60WΓ—8h Β· External Monitor 30WΓ—8h Β· Router + Modem 20WΓ—8h Β· Phone Charger 15WΓ—2h

SCN-05 Β· 4 hours Β· needs 670Wh

Tailgate Party

Game day power for the crew

DELTA 3

The DELTA 3 gets through the afternoon at 77% of capacity. The RIVER 3 Plus would need nearly three times what it holds, so it covers about a third of the party.

Battery budget usedlower = more headroom

LOADΒ Β Blender 400WΓ—0.5h Β· LED TV (55") 80WΓ—4h Β· Bluetooth Speaker 15WΓ—4h Β· Phone Charger (Γ—3) 45WΓ—2h

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 comes up 3,815Wh short (about 19% covered), the RIVER 3 PLUS 4,442Wh (5%). 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 150WΓ—24h Β· Laptop 60WΓ—4h Β· Phone Charger 15WΓ—3h Β· LED Lights 40WΓ—5h Β· Fan 75WΓ—8h

SCN-07 Β· an afternoon Β· needs 100Wh

Afternoon Off-Grid

Phones and a speaker at the park, beach, or campsite β€” the small-unit job description

Either unit

This is the RIVER 3 Plus's job. Phones and a speaker for an afternoon use 41% of its battery. The DELTA 3 barely notices it, but at 10.4 lb the RIVER is the one I'd want on my shoulder.

Battery budget usedlower = more headroom

LOADΒ Β Phone Charger (Γ—2) 30WΓ—2h Β· Bluetooth Speaker 10WΓ—4h

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

DELTA 34.2h
dead in 4.2h β€” before your 8h window ends
RIVER 3 PLUS1.2h
dead in 1.2h β€” before your 8h window ends

For this load: DELTA 3 runs 4.2h vs 1.2h.

Check DELTA 3 price β†’

$629 list Β· direct from EcoFlow

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 0–58h
ApplianceDELTA 3RIVER 3 PLUS
CPAP Machine40W draw
DELTA 3: 21.8h2 full nights
RIVER 3 PLUS: 6.1h0 full nights
Phone Charger15W draw
DELTA 3: 58h
RIVER 3 PLUS: 16.2h
Router + Modem20W draw
DELTA 3: 43.5h
RIVER 3 PLUS: 12.2h
Starlink75W draw
DELTA 3: 11.6h
RIVER 3 PLUS: 3.2h
LED Lights (4 bulbs)40W draw
DELTA 3: 21.8h
RIVER 3 PLUS: 6.1h
Laptop (Working)60W draw
DELTA 3: 14.5h
RIVER 3 PLUS: 4.1h

Comfort & Convenience

Makes off-grid life actually enjoyablescale 0–11.6h
ApplianceDELTA 3RIVER 3 PLUS
Box Fan75W draw
DELTA 3: 11.6h
RIVER 3 PLUS: 3.2h
LED TV (55")80W draw
DELTA 3: 10.9h
RIVER 3 PLUS: 3h
Mini-Fridge150W draw
DELTA 3: 5.8h
RIVER 3 PLUS: 1.6h
Electric Blanket200W draw
DELTA 3: 4.4h0 full nights
RIVER 3 PLUS: 1.2h0 full nights

High-Draw Appliances

These reveal the real limitsscale 0–0.9h
ApplianceDELTA 3RIVER 3 PLUS
Coffee Maker1000W draw
DELTA 3: 0.9h
RIVER 3 PLUS: β€” exceeds output
Microwave1200W draw
DELTA 3: 0.7h
RIVER 3 PLUS: β€” exceeds output
Space Heater1500W draw
DELTA 3: 0.6h
RIVER 3 PLUS: β€” exceeds output

ΒΉ 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

October 25, 2026

Verdict: the DELTA 3, on Power Score margin

Default to the DELTA 3 if you're unsure. It's the one of these two that carries a CPAP through the night or a tailgate through the afternoon, and it costs less per lifetime kWh, $0.15 against $0.30. Pick the RIVER 3 Plus on purpose. It suits a small job you carry by hand, or a budget that stops at $259. Both carry a five-year warranty, and the DELTA 3's cells are rated for 4,000 cycles against 3,000.

Today the DELTA 3 is $599, $30 under its typical $629. The verdict weighs typical prices, not today's. Prices checked 28 days ago.

Cost to ownDELTA 3$0.15 vs $0.30 /lifetime-kWh
Cycle lifeDELTA 34,000 vs 3,000 cycles
Continuous outputDELTA 31,800W vs 600W
Typical priceRIVER 3 PLUS$259 vs $629
PortabilityRIVER 3 PLUS10.4 vs 27 lb
Solar inputDELTA 3500W vs 220W
β– β– β– β– β– β– β–‘β–‘β–‘β–‘6/10

Editor-assigned confidence, based on cited owner research and spec analysis.

List prices as of October 25, 2026. The links below open EcoFlow's current price.

Check DELTA 3 price

$599.00 Β· direct from EcoFlow

down from $629 Β· 5% below usual

Last checked 28 days ago. Prices move β€” check before you buy.

or check the RIVER 3 PLUS price$299.00 list

Written by Wenny Zheng, Portable Power Tester Β· Station Arena Test Desk Β· Updated October 25, 2026

Black Friday Β· 26 days out

Prices to beat:DELTA 3 $519RIVER 3 PLUS $259

The lowest we have recorded for each. We have never seen the RIVER 3 PLUS discounted, so any real cut on it would be a first.

EcoFlow Black Friday deals β†’
04

Measured Data

Benchmark scores and the full spec record, side by side.

Benchmark scores

DELTA 3RIVER 3 PLUS
Overall Power Score
3,017
1,866
UPSResponse & Reliability
3,436
2,755
CPAPSleep Therapy Reliability
3,476
2,909
Solar GeneratorSolar Input & Efficiency
2,622
1,677
TailgatingOutlets & Portability
2,783
1,804
Apartment BalconyCompact Solar Living
2,797
1,889
CampingLightweight & Versatile
2,661
1,785

Not rated for both units (minimum threshold unmet): RV Living, Home Backup, Food Truck.

Full specifications

DELTA 3
$599β˜… our pick
Updated Oct 25
See live price β†’
RIVER 3 PLUS
$299
Updated Oct 25
See live price β†’
Capacity (Wh)
1024
286
Output (W)
1800
600
Surge Peak
3600W
1200W
AC Outlets
6
3
240V Outlets
0
0
30A RV Outlets
0
0

ᡈ Derived: price Γ· rated capacity. See the data behind our comparisons β†’

Comparison ToolAdd more power stations, side by sideOpen Tool β†’
How 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 β†’

Class 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 rates 4.5/5 (73rd percentile of 27 Everyday-class units), and RIVER 3 PLUS rates 5.0/5 (99th percentile of 25 Personal-class units).

How the class ranking is computed β†’

Test Notes & Caveats

Hidden gotchas and advantages we spotted that you won't find on the product page.

[NOTE]

Same Five Years

Both carry a five-year warranty, so coverage isn't a tiebreaker. The DELTA 3's cells are rated for 4,000 cycles against the RIVER 3 Plus's 3,000.

[NOTE]

Count Energy, Not Years

A cycle on the DELTA 3 moves 1,024Wh. A cycle on the RIVER 3 Plus moves 286Wh. So compare lifetime energy, not lifetime years: roughly 4,096 kWh against 858 kWh over the rated life. After its rated cycles a battery keeps working at reduced capacity.

Full record above β€” the Test Desk pick is the DELTA 3.

Check DELTA 3 price β†’or check the RIVER 3 PLUS price
05

Ownership Analysis

What happens after you buy β€” true cost of ownership, brand trust, and growth potential.

Lifetime value

DELTA 3RIVER 3 PLUS

β”‚ warranty ends Β· Reaching the cycle rating means ~80% capacity remains β€” degraded, not dead.

DELTA 3
RIVER 3 PLUS
Purchase price
$599.00
$299.00
Lifetime energy delivered
4,096 kWh
858 kWh
Cost per lifetime kWh
$0.15
$0.30
Cost per warranty year
$126/yr
$52/yr
Battery lifespan
11yr daily Β· 38.5yr weekends Β· 76.9yr weekly
8.2yr daily Β· 28.8yr weekends Β· 57.7yr weekly

Analyst note

The RIVER 3 PLUS is cheaper to buy, but the DELTA 3 is cheaper to own. At $0.15/kWh over its lifetime vs $0.30/kWh, the DELTA 3's higher cycle life and capacity make each dollar go further over the years.

Delivers each lifetime kWh for $0.15 less β€” check the DELTA 3 price β†’

Growth path

DELTA 3

EXPANDABLE

Supports EcoFlow expansion batteries, so you can add capacity later without replacing the base unit β€” useful if your needs may climb past 1,024Wh.

Accepts up to 500W of solar. Suitable for a 1-2 panel setup.

Generous port selection supports complex multi-device setups.

Expansion batteries are EcoFlow-specific. You're investing in the EcoFlow ecosystem.

RIVER 3 PLUS

EXPANDABLE

Supports EcoFlow expansion batteries, so you can add capacity later without replacing the base unit β€” useful if your needs may climb past 286Wh.

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.

Expansion batteries are EcoFlow-specific. You're investing in the EcoFlow ecosystem.

DELTA 3RIVER 3 PLUS

Analyst note

Both expand, but the DELTA 3's higher solar ceiling (500W vs 220W) gives it the stronger off-grid growth path β€” more panels can feed a bigger bank as it grows.

06

What Owners Report

Patterns from published owner reports and long-term reviews β€” every claim cited to its source below.

EcoFlow DELTA 3

Field coverage on the standard DELTA 3 is thin, our researcher found. Most published testing covers its Plus, Max and Ultra siblingsA0. What exists on the base unit is about the fans. At light loads they often stay off entirely, and at moderate loads reviewers found them barely audible from three feet awayA1.

Reviewers also report a switchover fast enough that routers don't reset and CPAP machines keep running when the power cuts. That test ran on the DELTA 3 Plus, a sibling with the same rated switchover, so treat it as likely rather than confirmed for this unitA2.

β€œAt low loads (under 200W) the fans often stay completely off, making the Delta 3 effectively silent; under moderate load (500–800W) the fans are barely audible from three feet away.”
β€” portablepowernerd.com β€” EcoFlow Delta 3 Tested: 2026 Hands-On Review; thesolarlab.com, 2026

Sources

portablepowernerd.com Β· thesolarlab.com Β· outputreport.com

EcoFlow RIVER 3 PLUS

Coverage on the RIVER 3 Plus is more settled. Reviewers keep returning to the same points. It takes EcoFlow's add-on batteriesB1. It's very quiet, quieter than most refrigerators by one accountB2. And it's light enough to call portable without squintingB3.

Its LiFePO4 cells are reported to last around a decade of everyday use before dropping to 80% of their capacityB4. EcoFlow rates the DELTA 3 for more cycles, so the smaller unit is the one that wears out first.

β€œ286Wh base, expandable to 572Wh (EB300) or 858Wh (EB600), with a genuine 600W inverter (1,200W X-Boost) and 220W solar input β€” twice the inverter and solar of the base RIVER 3.”
β€” ecoflow.com / bestgeneratorsolar.com β€” RIVER 3 Plus review, 2026

Sources

ecoflow.com Β· bestgeneratorsolar.com Β· thepowerpick.com Β· storagereview.com Β· phonearena.com Β· greenreviewshub.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

  • Expandable capacity, doubled inverter and solar over the base RIVER 3, remarkable sub-30dB quiet, and light weight are the praise. [RIVER 3 PLUS Β· 3 entries]
  • A1

    β€œAt low loads (under 200W) the fans often stay completely off, making the Delta 3 effectively silent; under moderate load (500–800W) the fans are barely audible from three feet away.”

    portablepowernerd.com β€” EcoFlow Delta 3 Tested: 2026 Hands-On Review; thesolarlab.com Β· 2026 Β· [positive]

  • A2

    β€œUPS switchover works as advertised β€” a power cut results in a ~10ms handoff, fast enough that routers don't reset, fridges don't skip a compressor cycle, and CPAP machines don't interrupt therapy.”

    outputreport.com / thesolarlab.com β€” DELTA 3 line UPS testing (observed on DELTA 3 Plus, which shares the 10ms UPS spec) Β· 2026 Β· [positive]

  • B1

    β€œ286Wh base, expandable to 572Wh (EB300) or 858Wh (EB600), with a genuine 600W inverter (1,200W X-Boost) and 220W solar input β€” twice the inverter and solar of the base RIVER 3.”

    ecoflow.com / bestgeneratorsolar.com β€” RIVER 3 Plus review Β· 2026 Β· [positive]

  • B2

    β€œSub-30dB operation is genuinely remarkable β€” quieter than a library and than most refrigerators.”

    thepowerpick.com β€” RIVER 3 Plus review Β· 2026 Β· [positive]

  • B3

    β€œWeighs about 10.4 lbs and is highly portable; a small-format station that grows with you, able to briefly run a coffee maker, microwave, or space heater.”

    storagereview.com / phonearena.com β€” RIVER 3 Plus review Β· 2026 Β· [positive]

  • B4

    β€œLiFePO4 rated for 3,000 charge cycles β€” around 10 years of everyday use before capacity drops to 80%.”

    greenreviewshub.com / bestgeneratorsolar.com β€” RIVER 3 Plus review Β· 2026 Β· [positive]

Research compiled October 25, 2026.

07

What Owners Actually Report

Drawn from 48 comments on independent review channels β€” not from retailer reviews, which skew to the first week of ownership. Each line is our summary of one commenter's claim, linked to the original. We record what they said, including where it contradicts the spec sheet.

EcoFlow DELTA 3

34 claims from 26 comments Β· 17 from owners Β· 7 with figures

Solar input
5 Β· 27% negative
Runtime
3 Β· 66% negative
Price & value
4 Β· 11% negative
Build quality
2 Β· 100% negative
Inverter & surge
2 Β· 0% negative

What owners complain about

  • At 30% charge it ran a 12V cool box for only 30 minutes against a claimed 12 hours at full charge.

    Runtimemeasuredowner1 agreedsource β†’

  • AC-port surge protection is rated only 150 joules versus 1,800 on his UPS, so he chained both.

    Build qualitymeasuredownersource β†’

  • Four 12V 100W panels in series give an overload error despite a 60V input rating.

    Solar inputmeasuredownersource β†’

What owners praise

  • The same pressure washer ran on their DELTA 3 with no errors.

    Inverter & surgemeasuredowner1 agreedsource β†’

  • Charges 0-100% in 1 hour on 1,000W of solar; 800W takes only 20 minutes longer.

    Solar inputmeasuredowner1 agreedsource β†’

  • Bought a DELTA 3 from a Costco sale for $389 to replace a 1500VA UPS.

    Price & valuemeasuredownersource β†’

EcoFlow RIVER 3 PLUS

50 claims from 22 comments Β· 44 from owners Β· 14 with figures

UPS switchover
7 Β· 48% negative
Price & value
4 Β· 0% negative
App & firmware
7 Β· 54% negative
Inverter & surge
4 Β· 43% negative
Expandability
3 Β· 0% negative

What owners complain about

  • River 3 Plus overloaded with error 502 on a hotpot drawing only 345W of its 600W rating.

    Inverter & surgemeasuredowner9 agreedsource β†’

  • Testing gave only 85-87% of the rated 286Wh through AC before the unit hit 0%.

    Runtimemeasuredownersource β†’

  • AC outputs kept shutting off, dropping from hours to every 15 minutes.

    UPS switchovermeasuredownersource β†’

What owners praise

  • 10ms cutover means his modem, router and computer never blip.

    UPS switchovermeasuredowner34 agreedsource β†’

  • Bought it for $219 at Costco plus a $58 100W folding panel.

    Price & valuemeasuredowner43 agreedsource β†’

  • With X-Boost on, the same 600W hotpot runs and boils water, so the feature has a real use case.

    Othermeasuredowner9 agreedsource β†’

Claims are weighted by how specific they are, whether the commenter owns the unit, and how many readers agreed. Comments that mention a product under a rival's review count for more, because the commenter had no reason to be there. This is what buyers report, not our test results β€” for measurements we ran ourselves, see the methodology.

08

Who Should Buy Which

Buy the DELTA 3 if you…

  • β†’You need a CPAP through the night or a tailgate through the afternoon. The RIVER 3 Plus can't finish either.
  • β†’You want the lower cost per lifetime kWh and don't mind carrying 27 lb to get it.
  • β†’You plan to add panels. The DELTA 3 takes 500W of solar to the RIVER's 220W.

This is you β€” check the DELTA 3 price

Buy the RIVER 3 PLUS if you…

  • β†’Your real load is phones, a camera and a speaker, and you carry the station by hand.
  • β†’Your budget stops at $259, and the job is small enough to fit it.

This is you β€” check the RIVER 3 PLUS price

If neither fits

If the real need is a weekend away, an 8-hour blackout or a day of van life, both fall well short. A weekend in our model comes to about 2,100Wh, and even the DELTA 3 covers less than half of it. Look at a bigger station instead of choosing between these two.

09

The Bottom Line

The DELTA 3 does more of everything worth paying for. It has about three and a half times the battery, three times the output and a lower cost per lifetime kWh. It's also the only one of the two that finishes a CPAP night or a tailgate.

The RIVER 3 Plus earns its place when the job is small and you carry it. Phones, a camera, a speaker, an afternoon at the trailhead. Past that, buy the DELTA 3. Past the DELTA 3, look at a bigger shelf.

10

Frequently Asked Questions

Answers drawn from the spec record and cited owner research.

Is the EcoFlow DELTA 3 or RIVER 3 Plus better?

They are sized for different jobs. The DELTA 3 is the only one of the two that finishes a CPAP night (37% of its usable capacity) or a tailgate (77%) in our scenarios. The RIVER 3 Plus is built for smaller loads, like phones and a speaker for an afternoon, at 10.4 lbs and $259.

Can the RIVER 3 Plus run a CPAP machine all night?

Not at its base 286Wh. A 320Wh overnight CPAP load needs 132% of what it holds, so it covers about three quarters of the night. The DELTA 3 covers the same night using 37% of its usable capacity.

Is the DELTA 3 worth $370 more than the RIVER 3 Plus?

If your loads are anywhere near a CPAP night or a tailgate, yes. The RIVER 3 Plus can't finish either, and the DELTA 3 also costs less per lifetime kWh ($0.15 against $0.30). If your real draw is a phone and a laptop, the extra $370 buys capacity you won't use.

Which EcoFlow unit is cheaper to own, the DELTA 3 or the RIVER 3 Plus?

Per lifetime kWh, the DELTA 3, at $0.15 against the RIVER 3 Plus's $0.30. The RIVER 3 Plus costs less up front. Which matters depends on how much energy you actually use each year.

Can the RIVER 3 Plus be expanded to match the DELTA 3's capacity?

It takes EcoFlow's expansion batteries, and so does the DELTA 3. The DELTA 3 accepts 500W of solar input against the RIVER 3 Plus's 220W, so it refills faster from panels either way.

Check DELTA 3 price β†’

Where to buy

DELTA 3

EcoFlow DELTA 3Pick

$599.00

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$599.00 Β· direct from EcoFlow

down from $629 Β· 5% below usual

Last checked 28 days ago. Prices move β€” check before you buy.

RIVER 3 PLUS

EcoFlow RIVER 3 PLUS

$299.00

Check current price

$299.00 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.