EcoFlow · DELTA Pro series
EcoFlow DELTA Pro
The DELTA Pro is the sourdough starter of EcoFlow’s big line: first of six; everything after it was grown from it. Ninety-nine pounds, 3.6 kilowatt-hours, a weekend camp or a blackout night. Of 211 owner reports, the twenty-seven serious ones are units that died; the rest run about the corpus norm, and some run twenty-one kilowatt-hours off two of them.
3.6 kWh · 3,600 W · 99 lb · 3,500 cycles · 39 head-to-heads
4,810
Power Score · Appliance Class
- 3.6 kWh
- capacity
- 3,600 W
- output
- 99 lb
- weight
- 3,500
- rated cycles
Should you buy it right now?
Fair price today: $1,899 is what it normally sells for. It clears 5 of 6 real-world jobs and wins 28 of 39 matchups.
Real-world jobs
5 of 6
Falls short only on Van Life Daily
Head-to-head record
28–11
39 adjudicated matchups
Verdicts by Gunner Gustafson and the Test Desk·Figures computed 2026-09-07
01 · Six real-world jobs
What the DELTA Pro 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
Clears it2 nights · Two nights off-grid with essential comfort
2,100Wh needed · 69% of the tank · 960Wh spare
Peak 75W: starts and holds
8-Hour Blackout
Clears it8 hours · Keep the essentials running through a night without power
1,645Wh needed · 54% of the tank · 1,415Wh spare
Peak 150W: starts and holds
CPAP Overnight
Clears it8 hours · Sleep therapy without interruption — the #1 medical use case
320Wh needed · 10% of the tank · 2,740Wh spare
Peak 40W: starts and holds
Remote Workday
Clears it8 hours · Full work day off-grid without power anxiety
910Wh needed · 30% of the tank · 2,150Wh spare
Peak 60W: starts and holds
Tailgate Party
Clears it4 hours · Game day power for the crew
670Wh needed · 22% of the tank · 2,390Wh 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 · 153% of the tank · 1,625Wh short
Peak 150W: starts and holds
02 · Head-to-head record
28 wins in 39 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
28–11
- vs EcoFlow9–3
- vs BLUETTI8–4
- vs Anker5–1
- vs Jackery2–3
- vs Goal Zero3–0
- vs DJI1–0
winsDELTA Pro vs EcoFlow DELTA 3 Max Plus
100 searches reached this matchup
losesDELTA Pro vs Jackery HomePower 3600 Plus
77 searches reached this matchup
losesDELTA Pro vs EcoFlow DELTA 3 Max
73 searches reached this matchup
losesDELTA Pro vs BLUETTI Elite 400
62 searches reached this matchup
winsDELTA Pro vs Anker SOLIX F2000
55 searches reached this matchup
winsDELTA Pro vs BLUETTI AC200L
52 searches reached this matchup
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 Pro if…
You want the better lifetime cost per kWh and don't mind the extra weight or the louder fans to get it.
Decided 12 matchups · read one →
You want a published noise number before you commit to a unit that'll sit in your living room during an outage.
Decided 4 matchups · read one →
You already know your power needs will grow and want an expansion path instead of a second unit down the line.
Decided 3 matchups · read one →
You're building toward more solar and want the faster 1,600W refill ceiling to grow into.
Decided 3 matchups · read one →
A rival won when…
You want the longer-lived battery — 500 more rated cycles — and the faster 10ms UPS switchover.
Decided 6 matchups · read one →
You want a desk UPS that won't wake you. 10ms switchover and a 45 dBA rating against the DELTA Pro's 20ms and 60 dBA, and it's back to full in about 70 minutes [B2].
Decided 3 matchups · read one →
You want to save $200 up front ($1,399 vs $1,599) on the quieter (30dB vs 60), lighter unit — and the lower cost to own ($0.12 vs $0.13 per lifetime kWh).
Decided 3 matchups · read one →
You need to lift or relocate this solo — 63.5 lbs against 99 is a meaningfully different physical task.
Decided 3 matchups · read one →
04 · Price history
What the DELTA Pro 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 17 · 53 days
Carried on 64% of days tracked · dips reach $1,599
Built from the Sep 7, 5 AM UTC read.
$1,899
Usual price
64% of days tracked
$1,599
Best we've seen
August 4
$1,899
Today
at usual
$1,899
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 Pro: usually $1,899, best $1,599 (Aug 4), today $1,899 on us.ecoflow.com. Tracked twice a day since Jul 17. https://stationarena.com/products/ecoflow-delta-pro#price-history
Alerts for the DELTA Pro
One email when it drops below $1,899, comes back in stock, or a newer model in this line appears. Nothing else.
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05 · Voices
What 211 owner reports say about the DELTA Pro
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.
- 44%
- positive
- 155
- self-declared owners
- 39
- measured reports
- 102
- videos
- 52%
- EcoFlow norm
- 2021–2026
- reporting period
84 for, 107 against
16 owned 6+ months
numbers, not impressions
10 channels
across 1,668 reports
2021-06-01 to 2026-09-01
Weighted read
49% positive weighted · corpus 51% · about typical
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, support27 against · 9 for
- How it performs26 against · 42 for
- How it feels to use54 against · 33 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.
- Price & value11 measured50% positive · brand 58%1818
- Durability & failures3 measured29% positive · brand 26%156
- Solar input6 measured45% positive · brand 51%119
- General3 measured38% positive · brand 63%106
- Capacity & runtime3 measured75% positive · brand 81%412
- Support & warranty20% positive · brand 33%123
- App & firmware1 measured36% positive · brand 54%95
- Weight & portability2 measured30% positive · brand 60%73
- Expandability3 measured56% positive · brand 65%45
- Build quality86% positive · brand 38%16
- Charging speed4 measured83% positive · brand 78%15
- Noise17% positive · brand 44%51
- Idle drain2 measured80% positive · brand 48%14
- Shipping & availability0% positive · brand 9%5
- Inverter & surge1 measured33% positive · brand 56%21
- UPS switchover0% positive · brand 56%2
left: negative · right: positive
When the reports were made
What owners compare it against
What owners praise
Expandabilitymeasuredowner
Two DELTA Pro units and four batteries give him 21,600Wh with 5000W of solar.
City Prepping· 9 likessource
Price & valuemeasuredowner
Got it at Costco for $2599 with EV plug and remote display, versus $3699.
DIY Solar Power with Will Prowse· 11 likessource
Solar inputmeasuredowner
Charges two DELTA Pros from two ~2,500W strings running at about 125V.
HOBOTECH· 13 likessource
What owners complain about
Durability & failuresmeasuredowner · 8 mo
Bought October 2023, died June 2024.
The Solar Lab· 25 likessource
Charging speedmeasuredowner · 2 mo
App caps DC input at 8A, so he gets only 100W from a 200Ah battery that could give far more.
DIY Solar Power with Will Prowse· 11 likessource
Expandabilitymeasuredowner
Expansion units cost $2799 for only 3600Wh; rack batteries give 5120Wh for $1000 less.
DIY Solar Power with Will Prowse· 8 likessource
Reviewer consensus
2/4 positive excerpts, 6 sources
Established home-backup platform with wheeled portability and massive expandability; the consistent knock is fan noise under heavy load.
backuppowerhub.com · us.ecoflow.com · outdoorgearlab.com · bobvila.com · powerstationadvisor.com · robbsutton.com · researched 2026-07-10
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
“DELTA Pro wins on real-world coverage, not on being the newer or fancier unit — DELTA 3 Max Plus is EcoFlow's more modern platform and it shows in switchover speed and noise.”
“Take the HomePower 3600 Plus.”
“These are the same brand a generation apart, and the newer, cheaper unit wins most of the ways a buyer feels day to day.”
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
3600
Capacity (Wh)
- ChemistryLiFePO4
- Charging Cycles3500
- Battery Expansion FeasibilityYes
Power out
3600
Output (W)
- Surge Peak7200W
- AC Outlets5
- 240V Outlets0
- 30A RV Outlets1
- 12V Car Outlets1
- USB-C Ports2
- USB-A Ports4
- USB-C Charging Outputs100W
Charging
1600
Solar Input (W)
- Solar Input TypeXT60
Living with it
99
Weight (lbs)
- Noise Level (db)<60
- UPSYes (<20ms)
- App ControlYes
- Warranty (Years)5
Compare it with
DELTA Pro vs
leads on 4 · trails on 5
| Spec | DELTA Pro | DELTA 3 Max Plus | Gap |
|---|---|---|---|
| Usual price | $1,899 | $1,199 ● | +$700 |
| Capacity (Wh) | 3600 ● | 2048 | +1552 |
| Output (W) | 3600 ● | 3000 | +600 |
| Surge (W) | 7200W ● | 6000W | +1200 |
| Rated cycles | 3500 | 4000 ● | -500 |
| Solar input (W) | 1600 ● | 1000 | +600 |
| Weight (lb) | 99 | 50.7 ● | +48.3 |
| Noise (dB) | <60 | 30 ● | +30 |
| AC outlets | 5 | 6 ● | -1 |
| USB-C ports | 2 | 2 | 0 |
| Warranty (yr) | 5 | 5 | 0 |
| Chemistry | LiFePO4 | LiFePO4 | |
| UPS | Yes (<20ms) | Yes (10ms) |
● marks the better figure where direction is clear. Price is each unit’s usual price.
Read the full verdict →07 · EcoFlow DELTA Pro 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.
$0.53
per Wh
at $1,899
$0.15
per lifetime kWh
12,600 kWh over 3,500 cycles
9.6 yr
if cycled daily
34 yr at weekends only
5 yr
warranty
$380 per covered year
09 · From the matchups
Questions people ask
Which EcoFlow unit is cheaper to own long-term, the DELTA 3 Max Plus or the DELTA Pro?
It depends on the measure. Per lifetime kWh delivered, DELTA Pro is cheaper at $0.11 against $0.12, because its bigger tank moves more total energy over its life. Per warranty-year, DELTA 3 Max Plus is cheaper at $200 a year against $280, since both carry the same 5-year term on a lower purchase price.
Is DELTA Pro worth $400 more and 48.3 lbs more than DELTA 3 Max Plus?
Only if you're actually using the extra capacity. DELTA Pro clears every modeled scenario except Van Life Daily with real room to spare, while DELTA 3 Max Plus fails Weekend Camping outright. If your real use stays overnight or single-day, the smaller unit already does the job for less money and less weight.
Is the Jackery HomePower 3600 Plus worth $20 more than the EcoFlow DELTA Pro?
Yes, for anyone who'll use it regularly. The $20 ($1,619 against $1,599) buys a pack rated for 6,000 cycles instead of 3,500, 21.8 lbs off every lift, more solar input (2,000W against 1,600W), and a 30dB noise rating against 60dB. The only thing going the other way is 16Wh of capacity, which on a 3,600Wh battery is under half a percent and will never show up in use.
Does the DELTA Pro's expandability make it the better long-term buy?
No, because both expand. Each supports its own maker's expansion batteries, so neither one boxes you in and the expansion checkbox cancels out of the comparison entirely. Decide on the specs that don't cancel: weight, noise and cycle life. If you're certain you'll add batteries, the more useful question is which brand's expansion packs you can actually get hold of when you want one.
Is the DELTA Pro worth $600 more than the DELTA 3 Max?
Only if your loads cross what the Max holds or delivers. The $600 buys 1,552Wh more capacity and 1,200W more continuous output, but the Max is actually the newer unit — quieter at 30dB vs 60dB, lighter at 50.7 lbs vs 99, and rated for more cycles. If your draw fits under 2,048Wh and 2,400W, keep the $600.
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.