EcoFlow · DELTA Pro series
EcoFlow DELTA Pro Ultra + 2 Batteries
The DELTA Pro Ultra with two batteries is the biggest EcoFlow we list: 18 kilowatt-hours, 405 pounds, a ten-year warranty, and every scene we run cleared, the van day on under a third of the tank. Nobody carries it; it is installed, like a water heater with opinions. Reviewers’ complaint is a support line that answers specific questions vaguely.
18.4 kWh · 7,200 W · 405.4 lb · 3,500 cycles · 8 head-to-heads
13,614
Power Score · Whole-Home Capable
- 18.4 kWh
- capacity
- 7,200 W
- output
- 405.4 lb
- weight
- 3,500
- rated cycles
Should you buy it right now?
Fair price today: $7,999 is what it normally sells for. It clears 6 of 6 real-world jobs and wins 4 of 8 matchups.
Verdicts by Gunner Gustafson and the Test Desk·Figures computed 2026-09-07
01 · Six real-world jobs
What the DELTA Pro Ultra + 2 Batteries 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 · 13% of the tank · 13,567Wh spare
Peak 75W: starts and holds
8-Hour Blackout
Clears it8 hours · Keep the essentials running through a night without power
1,645Wh needed · 10% of the tank · 14,022Wh spare
Peak 150W: starts and holds
CPAP Overnight
Clears it8 hours · Sleep therapy without interruption — the #1 medical use case
320Wh needed · 2% of the tank · 15,347Wh spare
Peak 40W: starts and holds
Remote Workday
Clears it8 hours · Full work day off-grid without power anxiety
910Wh needed · 6% of the tank · 14,757Wh spare
Peak 60W: starts and holds
Tailgate Party
Clears it4 hours · Game day power for the crew
670Wh needed · 4% of the tank · 14,997Wh spare
Peak 400W: starts and holds
Van Life Daily
Clears it24 hours · A full day of mobile living — the ultimate endurance test
4,685Wh needed · 30% of the tank · 10,982Wh spare
Peak 150W: starts and holds
02 · Head-to-head record
4 wins in 8 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
4–4
- vs EcoFlow1–2
- vs Goal Zero2–0
- vs Jackery1–1
- vs BLUETTI0–1
winsDELTA Pro Ultra + 2 Batteries vs EcoFlow DELTA Pro Ultra X
24 searches reached this matchup
winsDELTA Pro Ultra + 2 Batteries vs Goal Zero Yeti PRO 4000 + Tank PRO 4000 (Yeti PRO 8000)
18 searches reached this matchup
losesDELTA Pro Ultra + 2 Batteries vs BLUETTI Elite 200 V2
14 searches reached this matchup
winsDELTA Pro Ultra + 2 Batteries vs Goal Zero Yeti 1000X
8 searches reached this matchup
losesDELTA Pro Ultra + 2 Batteries vs EcoFlow DELTA Pro Ultra
8 searches reached this matchup
losesDELTA Pro Ultra + 2 Batteries vs Jackery Explorer 5000 Plus
2 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 Ultra + 2 Batteries if…
You're backing up something that genuinely can't tolerate a switchover gap and want the longer 10-year warranty as insurance.
Decided 3 matchups · read one →
Van-life or off-grid daily users pulling close to 4,685Wh a day, where the single battery's 45% daily draw leaves less margin than the two-battery rig's 30%.
Households planning for multi-day outages where central air, a refrigerator, and a well pump all need to run at once for an extended stretch.
Your daily consumption is genuinely van-life sized. At 4,685Wh a day the DELTA Pro Ultra is working at 30% of itself while the Elite is 266% underwater.
A rival won when…
You want the cheapest kilowatt-hour on this page over the life of the pack, at 7 cents against 12, and you'd rather spend the difference on panels.
Decided 3 matchups · read one →
Anyone doing whole-home backup for outages measured in hours, not days — the single battery clears every non-van-life scenario in this test with room to spare.
Buyers who might relocate the unit later — a smaller move-in-day lift and a lower up-front price without giving up any output, surge, or UPS speed.
Anyone optimizing for lowest annual cost of ownership over raw capacity — $600 a year beats $800 a year when you don't need the extra Wh.
04 · Price history
What the DELTA Pro Ultra + 2 Batteries 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 100% of days tracked · dips reach $7,899
Built from the Sep 7, 5 AM UTC read.
$7,999
Usual price
100% of days tracked
$7,899
Best we've seen
August 11
$7,999
Today
at usual
$7,999
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 Ultra + 2 Batteries: usually $7,999, best $7,899 (Aug 11), today $7,999 on us.ecoflow.com. Tracked twice a day since Jul 17. https://stationarena.com/products/ecoflow-delta-pro-ultra-2-batteries#price-history
Alerts for the DELTA Pro Ultra + 2 Batteries
One email when it drops below $7,999, comes back in stock, or a newer model in this line appears. Nothing else.
By subscribing, you agree to our Privacy Policy.
05 · Voices
What owners and reviewers say
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.
Reviewer consensus
5/17 positive excerpts, 0 sources
Owners repeatedly report EcoFlow customer support gives dismissive or unhelpful answers to specific technical questions (manual gaps, RFI interference, app charting).
· researched 2026-07-15
From the test desk
“Take the DELTA Pro Ultra + 2 Batteries.”
“Take the DELTA Pro Ultra + 2 Batteries if you're installing a permanent whole-home system and actually plan to cycle it for years: twelve cents a kilowatt-hour against the Yeti PRO 8000's nineteen, backed by a 10-year…”
“Buy the Elite 200 V2 at $899 unless you can name a load it can't carry.”
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
18432
Capacity (Wh)
- ChemistryLiFePO4
- Charging Cycles3500
- Battery Expansion FeasibilityYes
Power out
7200
Output (W)
- Surge Peak10800W
- AC Outlets3
- 240V Outlets2
- 30A RV Outlets1
- 12V Car Outlets0
- USB-C Ports2
- USB-A Ports2
- USB-C Charging Outputs100W
Charging
5600
Solar Input (W)
- Solar Input TypeMC4
Living with it
405.4
Weight (lbs)
- Noise Level (db)30
- UPSYes (0ms)
- App ControlYes
- Warranty (Years)10
Compare it with
DELTA Pro Ultra + 2 Batteries vs
leads on 2 · trails on 5
| Spec | DELTA Pro Ultra + 2 Batteries | DELTA Pro Ultra X | Gap |
|---|---|---|---|
| Usual price | $7,999 | $7,999 | $0 |
| Capacity (Wh) | 18432 ● | 12288 | +6144 |
| Output (W) | 7200 | 12000 ● | -4800 |
| Surge (W) | 10800W | 45000W ● | -34200 |
| Rated cycles | 3500 | 3500 | 0 |
| Solar input (W) | 5600 | 10000 ● | -4400 |
| Weight (lb) | 405.4 | 298.7 ● | +106.7 |
| Noise (dB) | 30 | <30 | 0 |
| AC outlets | 3 | 4 ● | -1 |
| USB-C ports | 2 | 2 | 0 |
| Warranty (yr) | 10 ● | 5 | +5 |
| Chemistry | LiFePO4 | LiFePO4 | |
| UPS | Yes (0ms) | 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.
DELTA Pro
3.6 kWh · $1,899
DELTA Pro 3
4.1 kWh · $2,799
DELTA Pro Ultra
6.1 kWh · $4,199
DELTA Pro Ultra + 1 Battery
12.3 kWh · $5,999
DELTA Pro Ultra X
12.3 kWh · $7,999
DELTA Pro Ultra + 2 Batteries
18.4 kWh · $7,999
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.
$0.43
per Wh
at $7,999
$0.12
per lifetime kWh
64,512 kWh over 3,500 cycles
9.6 yr
if cycled daily
34 yr at weekends only
10 yr
warranty
$800 per covered year
09 · From the matchups
Questions people ask
How much heavier is the DELTA Pro Ultra + 2 Batteries setup, really?
405.4 lbs against the Yeti PRO 8000's 195.95 lbs — more than double. Both are professional-install jobs built around a home integration panel rather than something you carry, but the DELTA is the heavier one to route through a doorway on install day.
From ecoflow delta pro ultra 2 batteries vs goal zero yeti pro 4000 tank pro 4000 yeti pro 8000
How many batteries are in the DELTA Pro Ultra + 2 Batteries?
Three. The name counts the two you add rather than the one that ships with the base unit, which is why rated capacity is 18,432Wh against the base kit's 6,144Wh, exactly three times as much. System weight follows the same pattern at 405.4 lbs against 181.8 lbs. In physical terms that is four boxes on the floor instead of two.
From ecoflow delta pro ultra vs ecoflow delta pro ultra 2 batteries
Is the EcoFlow DELTA Pro Ultra + 2 Batteries worth $1,000 more than the Jackery Double Kit?
If you're keeping it for years, yes on the math: it costs $0.12 per lifetime kWh against $0.17 for the Jackery, and carries a 10-year warranty against 5. If you need maximum continuous output or lighter hardware right now, the $1,000 saved on the Jackery buys real capability elsewhere, not a downgrade.
From ecoflow delta pro ultra 2 batteries vs jackery explorer 5000 plus double kit
How much heavier is the DELTA Pro Ultra + 2 Batteries than the Jackery Double Kit?
136.4 pounds heavier: 405.4 lbs against 269 lbs. The extra weight sits mostly in the battery packs, which one owner reports needing two people to move safely [A8], so this is a system you install once rather than one you relocate often.
From ecoflow delta pro ultra 2 batteries vs jackery explorer 5000 plus double kit
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.