EcoFlow · DELTA series · new release
EcoFlow DELTA 3 1500
The DELTA 3 1500 sits halfway between the DELTA 3 Plus and the DELTA 2 Max, 512 watt-hours from each, and reviewers say the insides are a hybrid too, DELTA 2 hardware under a DELTA 3 shirt, hence their doubts. It wins 10 of 13 head-to-heads. Two owners wrote in; one metered 89 percent of the rated tank.
1.5 kWh · 1,800 W · 36 lb · 3,000 cycles · 13 head-to-heads
3,548
Power Score · Appliance Class
- 1.5 kWh
- capacity
- 1,800 W
- output
- 36 lb
- weight
- 3,000
- rated cycles
Should you buy it right now?
Fair price today: $599 is what it normally sells for. It clears 3 of 6 real-world jobs and wins 10 of 13 matchups.
Real-world jobs
3 of 6
Falls short on Weekend Camping, 8-Hour Blackout and Van Life Daily
Head-to-head record
10–3
13 adjudicated matchups
Verdicts by Ian Schneider and the Test Desk·Figures computed 2026-09-07
01 · Six real-world jobs
What the DELTA 3 1500 actually runs
The load profiles every comparison on the site is scored on, computed for this unit alone: energy needed against the usable tank after inverter losses, and whether the inverter holds and starts the biggest single load.
Weekend Camping
Falls short2 nights · Two nights off-grid with essential comfort
2,100Wh needed · 161% of the tank · 794Wh short
Peak 75W: starts and holds
8-Hour Blackout
Falls short8 hours · Keep the essentials running through a night without power
1,645Wh needed · 126% of the tank · 339Wh short
Peak 150W: starts and holds
CPAP Overnight
Clears it8 hours · Sleep therapy without interruption — the #1 medical use case
320Wh needed · 25% of the tank · 986Wh spare
Peak 40W: starts and holds
Remote Workday
Clears it8 hours · Full work day off-grid without power anxiety
910Wh needed · 70% of the tank · 396Wh spare
Peak 60W: starts and holds
Tailgate Party
Clears it4 hours · Game day power for the crew
670Wh needed · 51% of the tank · 636Wh spare
Peak 400W: starts and holds
Van Life Daily
Falls short24 hours · A full day of mobile living — the ultimate endurance test
4,685Wh needed · 359% of the tank · 3,379Wh short
Peak 150W: starts and holds
02 · Head-to-head record
10 wins in 13 written matchups
Every matchup is a full verdict scored on the six jobs above plus price, longevity and portability. This is the set shoppers search for, not a random sample.
Win share
10–3
- vs BLUETTI3–1
- vs EcoFlow3–0
- vs Jackery2–1
- vs Anker0–1
- vs DJI1–0
- vs Goal Zero1–0
winsDELTA 3 1500 vs DJI Power 1000
30 searches reached this matchup
winsDELTA 3 1500 vs EcoFlow DELTA 2
Written verdict
losesDELTA 3 1500 vs Anker SOLIX S2000
Written verdict
winsDELTA 3 1500 vs BLUETTI AC180
Written verdict
losesDELTA 3 1500 vs BLUETTI AC180P
Written verdict
winsDELTA 3 1500 vs BLUETTI Elite 100 V2
Written verdict
03 · From the verdicts
Who it is for, and when a rival won instead
Each line is lifted from a written matchup where it decided the verdict, and links to the page it came from. Repeated across many matchups means it is the unit’s signature, not one author’s opinion.
Buy the DELTA 3 1500 if…
You want the same 1,536Wh for $400 less and half the weight — 36 pounds you can move one-handed.
Decided 5 matchups · read one →
Buyers who want the lower entry price, saving about $100 up front
Decided 4 matchups · read one →
You start motor loads or run a UPS and want the 2x surge headroom and quicker 15ms cutover.
Decided 2 matchups · read one →
You want 50% more capacity — enough to clear a full workday the Delta 2 can't — for $120 more.
A rival won when…
You want the proven, better-documented unit and will pay $400 and carry 72 pounds for it.
Decided 5 matchups · read one →
You recharge off solar and want the 1,200W intake that refills more than twice as fast.
Decided 2 matchups · read one →
Anyone who carries the unit often and wants the lighter 27 lb build and the faster 10ms UPS cutover
Decided 2 matchups · read one →
1,024Wh is plenty for your loads and you'd rather pocket the $120 and the lower $479 entry price.
04 · Price history
What the DELTA 3 1500 actually sells for
The number on the buy button, read twice a day, one point per day. Never the sticker, never a “was” price.
Read from us.ecoflow.com twice a day since July 18 · 11 days · 41 gaps
Carried on 100% of days tracked · dips reach $599
Built from the Sep 7, 5 AM UTC read.
$599
Usual price
100% of days tracked
$599
Best we've seen
July 28
$599
Today
at usual
$599
Highest seen
0 days above usual
How to read this
- Usual is the price the unit carried most of the time, tested for how long it held rather than how often we looked. A weekend promotion cannot move it.
- Best is the lowest price we have read on the store itself. Typed coupon codes, member-only prices and marketplace listings are not counted; anything applied automatically at checkout is.
- A gap in the line is a day we could not read a price. We never draw across one, and we never show the store’s own “was” price.
Method on the methodology page.
Share the numbers
EcoFlow DELTA 3 1500: usually $599, best $599 (Jul 28), today $599 on us.ecoflow.com. Tracked twice a day since Jul 18. https://stationarena.com/products/ecoflow-delta-3-1500#price-history
Alerts for the DELTA 3 1500
One email when it drops below $599, comes back in stock, or a newer model in this line appears. Nothing else.
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05 · Voices
What 2 owner reports say about the DELTA 3 1500
Owner reports are paraphrased from public YouTube comments and each links to its source; reviewer consensus is counted from cited excerpts, never quoted; our own verdicts are quoted. Specs on this page never come from any of them.
- 100%
- positive
- 2
- self-declared owners
- 2
- measured reports
- 1
- videos
- 52%
- EcoFlow norm
- 2025–2025
- reporting period
2 for, 0 against
tenure rarely stated
numbers, not impressions
1 channel
across 1,668 reports
2025-01-24 to 2025-01-24
Weighted read
100% positive weighted · corpus 51% · above the norm
Raw counts reward whoever writes most, and people write when something breaks. Here each report is weighted by what the complaint costs a buyer (a failure outranks an app gripe) and by its evidence (a measured owner report outranks a shopper’s opinion), then compared with every report in the corpus.
- Failures, returns, support0 against · 0 for
- How it performs0 against · 1 for
- How it feels to use0 against · 1 for
By topic, against the EcoFlow norm
Bars count this unit’s reports; the tick is the share of positive reports for the same topic across every EcoFlow unit in the corpus.
- Capacity & runtime1 measured100% positive · brand 81%1
- Price & value1 measured100% positive · brand 58%1
left: negative · right: positive
Reviewer consensus
0/5 positive excerpts, 1 sources
Forum posters flagged the Delta 3 1500 as less reliable than EcoFlow's earlier Delta 2, both from direct failure reports and from its unusual hybrid Delta 2/Delta 3 hardware platform.
diysolarforum.com · researched 2026-07-17
EcoFlow, brand-wide
52% positive across 1,668 reports. The brand-wide complaint is shipping & availability (91% negative); the brand-wide praise is capacity & runtime (81% positive).
From the test desk
“Buy the DELTA 3 1500 unless quiet operation or long-term durability is a specific, named requirement for you.”
“The DELTA 3 1500 is the better buy for most: 1,536Wh to the Delta 2's 1,024 — half again the capacity — for $120 more, plus a stronger 2x surge ratio, a quicker 15ms cutover, and a lower $0.13 per lifetime kWh to the…”
“The Anker SOLIX S2000 is the better long-run buy for most people: 2,009.6Wh against 1,536Wh, 10,000 rated cycles against 3,000, and $0.03 per lifetime kWh against $0.13, for a sticker only about $100 higher.”
06 · Where each number comes from
Spec sheet, in four cards
Every field carries its source: green is the manufacturer’s own document, blue was adjudicated after sources disagreed, grey is the catalogue as imported. Then compare it line by line with the units people actually weigh it against.
Battery
1536
Capacity (Wh)
- ChemistryLiFePO4
- Charging Cycles3000
- Battery Expansion FeasibilityYes
Power out
1800
Output (W)
- Surge Peak3600W
- AC Outlets6
- 240V Outlets0
- 30A RV Outlets0
- 12V Car Outlets1
- USB-C Ports2
- USB-A Ports4
- USB-C Charging Outputs140W
Charging
500
Solar Input (W)
- Solar Input TypeNot Specified
Living with it
36
Weight (lbs)
- Noise Level (db)Not Specified
- UPSYes (15ms)
- App ControlYes
- Warranty (Years)5
Compare it with
DELTA 3 1500 vs
leads on 3 · trails on 5
| Spec | DELTA 3 1500 | Power 1000 | Gap |
|---|---|---|---|
| Usual price | $599 ● | $699 | $-100 |
| Capacity (Wh) | 1536 ● | 1024 | +512 |
| Output (W) | 1800 | 2200 ● | -400 |
| Surge (W) | 3600W | 4400W ● | -800 |
| Rated cycles | 3000 | 4000 ● | -1000 |
| Solar input (W) | 500 | 800 ● | -300 |
| Weight (lb) | 36 | 28.7 ● | +7.3 |
| Noise (dB) | Not Specified | 23 dB | |
| AC outlets | 6 ● | 2 | +4 |
| USB-C ports | 2 | 2 | 0 |
| Warranty (yr) | 5 | 5 | 0 |
| Chemistry | LiFePO4 | LiFePO4 | |
| UPS | Yes (15ms) | Yes (20ms) |
● marks the better figure where direction is clear. Price is each unit’s usual price.
Read the full verdict →07 · EcoFlow DELTA line
Where it sits in the line
Capacity bars are to scale across the line; prices are each unit’s usual price, not today’s.
08 · At its usual price
Cost of ownership
Cycle life is the manufacturer’s rating to 80% capacity; the lifetime figure is that rating times the nameplate capacity.
$0.39
per Wh
at $599
$0.13
per lifetime kWh
4,608 kWh over 3,000 cycles
8.2 yr
if cycled daily
29 yr at weekends only
5 yr
warranty
$120 per covered year
09 · From the matchups
Questions people ask
Is the EcoFlow DELTA 3 1500 discontinued?
Yes. EcoFlow discontinued the DELTA 3 1500 in July 2026; its successor is the smaller, 1,024Wh DELTA 3 Plus. If you buy the 1500 now, you're buying the model EcoFlow has already moved past, not its current flagship at this capacity.
Which is quieter, the DELTA 3 1500 or the Power 1000?
The Power 1000 is rated at 23dBA, and owners confirm it's whisper-quiet under normal loads, with sound only showing up past 1,500W [B1]. EcoFlow hasn't published a noise spec for the DELTA 3 1500 at all. If quiet operation matters, near a CPAP, a bedroom, or a shared van, that gap alone can be worth the Power 1000's higher price.
EcoFlow Delta 2 vs DELTA 3 1500 — is the upgrade worth it?
For most buyers, yes: the DELTA 3 1500 holds 50% more energy (1,536Wh vs 1,024Wh) for $120 more, adds surge headroom and a faster cutover, and costs less per lifetime kWh. The reason to hesitate is reliability — the DELTA 3 1500 is a discontinued hybrid whose thin field record leans negative, while the Delta 2 is proven over 18 months [A3]. Step up for the capacity; stay put for the track record.
Why might the newer DELTA 3 1500 be less reliable than the Delta 2?
Owner accounts are the reason. Posters described it as a Delta 2/Delta 3 hybrid built with lower-grade cells [B3], and forum consensus put the Delta 3 line's failures above the Delta 2's [B2], including a report of three units failing in eight months [B1]. It's a small, secondhand sample, but it's consistent enough that you'd want to buy from a retailer with an easy return.
Does the DELTA 3 1500 fix the Delta 2's fan noise?
There's no way to know from the spec sheet, because the DELTA 3 1500 doesn't publish a noise figure at all — where the Delta 2 honestly lists 50dB under load [A1]. Given fan noise is the Delta 2's most-cited flaw [A1], the absence of a number on its successor is conspicuous. If quiet operation is critical, that silence is a reason for caution, not comfort.
Some links are affiliate links; they never change the price you pay or which price we show. Owner reports are paraphrased from public comments and link to their source.