DELTA 3 Ultra
- 3,072Wh will stay enough: it can’t take extra batteries
- you charge mostly from the wall, at 1,800W like the Plus
- you want the same 3,600W and outlets for $300 less
DELTA 3 Ultra Plus
- you may add batteries later: up to about 11kWh
- you’ll run more than 800W of solar, up to 1,600W
- you charge from a generator or alternator, or run 12V gear on Anderson
Prices and stock checked by our price engine on November 5, 2026 at 7:29 AM EST. Each product is rechecked several times a day; the time refreshes when you load the page.
$300 buys a battery port and faster charging, not a longer night.
The EcoFlow DELTA 3 Ultra and the EcoFlow DELTA 3 Ultra Plus share the same 3,072Wh battery, the same 3,600W inverter, the same outlets and the same 10ms UPS. The Ultra Plus adds an extra battery port, twice the solar input, twice the generator charging speed and a 30A Anderson port. If 3kWh will stay enough and you charge mostly from the wall, the Ultra does the same job.
Below: every difference with numbers, a 20-second calculator for your own gear, six modeled situations, and what two published tests of the Ultra Plus found.
Same battery, same 3,600W, same outlets, same UPS. The Ultra Plus costs $300 more and buys four things: an extra battery port, 1,600W of solar, 3,200W generator charging with dual-input modes, and a 30A Anderson port.
- 3,072Wh is all you’ll ever need
- you recharge from the wall
- you want $300 back and 2 lb less
- you’ll add batteries for multi-day outages
- you’ll run more than 800W of panels
- you charge from a generator or a vehicle
The five differences that decide it
The five gaps that decide the purchase, with the better spec for most buyers flagged. The 3,072Wh battery, the 3,600W inverter and 7,200W surge, the 4,600W X-Boost, the outlets, the 10ms UPS and the 25dB rating are identical.
Will it run your setup? Check in 20 seconds
Estimates use 85% usable capacity and 70% of rated solar output. Real results vary with temperature, inverter load, shade and appliance cycling. Fridge and freezer watts are daily averages and do not include compressor startup surges.
Runtime by appliance, one at a time
Simple energy estimates, not measured runtimes. Same 3,072Wh in both, about 2,611Wh usable, so one column serves both; StorageReview measured 2,610Wh from the Ultra Plus.
Same battery, same runtime.
The Ultra and the Ultra Plus both hold about 2,611Wh usable, so every appliance runs just as long on either one.Get our Black Friday alerts for EcoFlow
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The price gap, in numbers
Same 3,072Wh battery: the EcoFlow DELTA 3 Ultra costs $300 less than the EcoFlow DELTA 3 Ultra Plus.
Prices refresh daily from EcoFlow US.2 × Ultra (6,144Wh) costs $900 less today.
EcoFlow publishes no cycle count for either, so we skip the lifetime figure. On the second card, two Ultras give you two separate 3,600W stations; the Ultra Plus with an extra battery puts 7,168Wh behind one inverter, and its EcoFlow bundle with a DELTA 3 Max Plus Extra Battery is another route. EcoFlow US prices move often; the figures here are refreshed daily by our price engine.
The third option: the DELTA Pro 3 at $2,799
EcoFlow DELTA Pro 3: $2,799 today
4,096Wh, 4,000W at 120V and 240V, 2,600W of solar, a 10ms UPS and expansion to about 12kWh with DELTA Pro 3 Extra Batteries, at 113.5 lb. OutdoorGearLab measured 3,790Wh out of it. Pick it if you need 240V or the biggest single-unit EcoFlow system short of the Pro Ultra. Our DELTA Pro 3 review goes deeper. See the DELTA Pro 3 at EcoFlow.
Eight modeled situations, worked out
Same formula as the calculator above, with 0 extra batteries unless stated. The fridge averages 60W, about 525kWh a year.
24-hour outage, essentials only
Identical on one battery. Only the Ultra Plus stretches to a third day with an extra battery.
Refill from solar, 1,600W of panels
Twice the solar means a full refill in one good afternoon on the Plus. With 800W of panels or less, they’re identical.
A long outage with a Smart Generator
The Plus cuts generator run time by about 40% per refill; EcoFlow lists 53 minutes. Add solar and it reaches 80% in 48 minutes.
Two nights in a van or RV
Same runtime. The Plus adds a 30A Anderson port for 12V gear and can charge from solar and an alternator at the same time, 2,600W, 0 to 80% in about an hour per EcoFlow.
Home office through an outage
A tie, including the UPS: under 10ms on both, 8.25ms measured on the Ultra Plus. The Plus’s Smart Output Priority can keep the PC outlet on while shedding others.
A well pump through an outage
Both start it on a 7,200W surge and run it the same time. Neither delivers 240V for a 240V pump.
A full-size fridge, nothing else
Same battery, same runtime. With solar during the day, either one can carry a fridge through a multi-day outage.
A 1,500W space heater on high
Heaters drain any portable station fast. Use the low setting, heat one small room, and treat the station as a bridge, not a heating plan.
Nine more differences, the spec sheet and the box
Smaller gaps and the things that stay identical, then the full specifications and what ships in the box.
DELTA 3 Ultra and DELTA 3 Ultra Plus weight, dimensions and full specifications
Weight: 72.1 lb for the Ultra and 74.3 lb for the Ultra Plus. Dimensions: about 24.6 × 12.9 × 15.6 in and 24.1 × 12.9 × 15.6 in, per EcoFlow. Everything else is in the sheet below.
EcoFlow DELTA 3 Ultra and DELTA 3 Ultra Plus full specifications
Every published figure for both units, grouped. Green marks the better value.
What’s in the box
DELTA 3 Ultra
- DELTA 3 Ultra3,072Wh, 72.1 lb
- AC charging cable
- Manuals and warranty card
- No solar or car cablesold separately
DELTA 3 Ultra Plus
- DELTA 3 Ultra Plus3,072Wh, 74.3 lb
- AC charging cable
- Manuals and warranty card
- Extra battery and adapter sold separately
From EcoFlow US product pages.
07 · ChargingHow fast each one refills
0 to 80%. Shorter bar, faster refill. Each row is scaled to its slower unit.
Both: X-Fusion keeps 3,600W available while charging from the wallUltra Plus: solar + alternator 2,600W, 0 to 80% in 60 min (EcoFlow)
Our solar estimate assumes panels deliver 70% of their rating; EcoFlow’s figures assume ideal sun.
Every port, side by side
DELTA 3 Ultra
DELTA 3 Ultra Plus
Practical consequence: the outlets are identical, so in a house they behave the same. The Plus’s Anderson port and extra inputs matter in a van, an RV or an off-grid cabin.
09 · NoiseNoise: Ultra vs Ultra Plus
EcoFlow rates the EcoFlow DELTA 3 Ultra and the EcoFlow DELTA 3 Ultra Plus the same: 25dB or less at 600W, measured at 1 m. Digital Trends found the Ultra Plus’s fans unobtrusive even at full load.
Same inverter. We found no independent measurement for the Ultra.Every figure we found, with its source
What reviewers heard: Fan noise stayed unnoticeable even under full load (Digital Trends).
Measured by a tester Brand figure
- Lower the AC charging speed in the app overnight.
Cold, heat and storage: Ultra vs Ultra Plus
The EcoFlow DELTA 3 Ultra and the EcoFlow DELTA 3 Ultra Plus share the same limits: charging from 32°F to 113°F, running from 14°F to 113°F. Both are indoor units with no water rating.
Figures from the EcoFlow US pages for both models.- In winter, charge either one indoors: neither charges below 32°F.
- For storage, keep it between 68°F and 86°F with some charge left, and top it up every few months.
App, UPS and smart features
The EcoFlow DELTA 3 Ultra Plus does more: it takes extra batteries, starts an EcoFlow Smart Generator by itself and adds Smart Output Priority. The EcoFlow DELTA 3 Ultra matches it on UPS, Storm Guard and off-peak charging.
Same app, same 10ms UPS with PC shutdown over USB-C.Green zone: a switch under about 16ms, which most desktop PCs ride through without restarting.
Can you add a battery later? The EcoFlow DELTA 3 Ultra Plus grows to about 11kWh; EcoFlow’s US comparison table lists no expansion for the EcoFlow DELTA 3 Ultra.
Can it start a generator by itself? The EcoFlow DELTA 3 Ultra Plus works with EcoFlow Smart Generators with automatic start and stop; EcoFlow lists no such feature for the Ultra.
Can you choose what stays powered? Smart Output Priority on the EcoFlow DELTA 3 Ultra Plus keeps priority outlets on and switches others off at a battery level you choose.
Does it work as a UPS? Both switch in under 10ms; StorageReview measured 8.25ms on the Ultra Plus. The 140W USB-C supports HID for a clean PC shutdown on both.
Does it prepare for storms? Both charge ahead of severe weather with Storm Guard, once set up in the app.
Can it charge off-peak? Both can charge off-peak and discharge during the day from the EcoFlow app.
Does it connect to a home? Both connect through a manual transfer switch or an inlet box via the 30A outlet.
Warranty and support
Same warranty on both: the EcoFlow DELTA 3 Ultra and the EcoFlow DELTA 3 Ultra Plus get 3 years, plus 2 more if you register them in the EcoFlow app.
Register either one the day it arrives.Subject to each brand’s warranty terms and eligibility.
EcoFlow publishes no cycle count for either model. Calendar aging and heat also reduce capacity.
- Register either one in the EcoFlow app the day it arrives: without registration, the warranty stops at 3 years.
What reviewers report
We have not lab-tested these two units. Here is what 3 published reviews found, with the source, author and date for each point. Reviews of UK and EU units are flagged: those models charge from 230V outlets and have different sockets, so their charge times and outlet findings don’t carry over to US units.
Ultra: no verifiable independent test foundUltra Plus: StorageReview (September 2025), Digital Trends (July 2026), How-To Geek (October 2025)
Usable capacity
- Ultra PlusReviewer A full discharge delivered 2.61kWh from the 3,072Wh pack, about 85 percent. StorageReview, Dylan Dougherty, September 2025
Charging
- Ultra PlusReviewer Refilling from empty took 3.54kWh from the wall, about 87 percent charging efficiency. StorageReview, Dylan Dougherty, September 2025
- Ultra PlusReviewer Wall charging at 1,800W reached 100 percent in roughly an hour and forty minutes. Digital Trends, Ian Bell, July 2026
- Ultra PlusReviewer Out of the box it charged at 200W; at the full 1,800W setting a full charge took about 1 hour 40 minutes, slower than the claimed 89 minutes. How-To Geek, Cory Gunther, October 2025
Noise and heat
- Ultra PlusReviewer Fan noise stayed unnoticeable even under full load. Digital Trends, Ian Bell, July 2026
UPS and output
- Ultra PlusReviewer Measured UPS transfer time was 8.25ms on a workstation load. StorageReview, Dylan Dougherty, September 2025
- Ultra PlusReviewer A full workstation with desktop, monitor, tablet and router ran for over 10 hours with capacity left. Digital Trends, Ian Bell, July 2026
- Ultra PlusReviewer A garage freezer ran for nearly three full days on one charge. Digital Trends, Ian Bell, July 2026
Daily use and issues
- Ultra PlusReviewer The display struggles in direct sunlight. Digital Trends, Ian Bell, July 2026
- Ultra PlusReviewer Switching to full 1,800W charging tripped the reviewer’s garage GFCI outlet. How-To Geek, Cory Gunther, October 2025
- Ultra PlusReviewer Big and heavy at over 75 lbs, with a display hard to read in sunlight. How-To Geek, Cory Gunther, October 2025
Practical limits before you buy
- The Ultra can never be expanded. No extra battery port. Buy it only if 3,072Wh will stay enough.
- Wall charging is the same. Both take 1,800W from a 120V outlet; the Plus’s speed gains need solar, a Smart Generator or an alternator.
- The Plus’s Anderson port and car socket share 378W.
- Expansion to about 11kWh uses DELTA Pro 3 Extra Batteries; DELTA 3 Max Plus batteries need EcoFlow’s Expansion Adapter.
- X-Boost is for heating loads only. Motors need the 3,600W rating and the 7,200W surge, the same on both.
- Neither delivers 240V.
- Both ship without solar or car cables.
- Register either one. 3 years plus 2 after app registration.
- Ultra, per its US documentation: No expansion: the US comparison table lists max scalability as 0 for the Ultra (11kWh for the Ultra Plus).
- Ultra, per its US documentation: No 12V/30A Anderson output and no Smart Output Priority; only the car cigarette outlet (126W).
- Ultra, per its US documentation: Solar input 800W max (Ultra Plus 1600W); wall charging 1800W, 0-80% in 1.48 hours.
- Ultra, per its US documentation: Four charging methods vs six on the Ultra Plus.
Frequently asked questions
What is the difference between the DELTA 3 Ultra and the DELTA 3 Ultra Plus?
Same battery, inverter, outlets and UPS. The Ultra Plus adds an extra battery port (up to about 11kWh), 1,600W of solar instead of 800W, 3,200W generator charging instead of 1,600W, dual-input charging, a 30A Anderson port and Smart Output Priority.
Can I add an extra battery to the DELTA 3 Ultra?
No. Only the Ultra Plus has an extra battery port.
How long will either run a refrigerator?
About 43 hours at a 60W average, on either. Digital Trends ran a garage freezer for nearly 48 hours on the Ultra Plus.
Which extra batteries fit the Ultra Plus?
EcoFlow lists up to two DELTA Pro 3 Extra Batteries for about 11kWh, and DELTA 3 Max Plus Extra Batteries with the Expansion Adapter.
Do they charge at the same speed?
From a wall outlet, yes: 1,800W, 0 to 80% in 89 minutes. From solar, a Smart Generator or a vehicle, the Ultra Plus is up to twice as fast.
Is the Ultra Plus worth the extra money?
Only if you’ll use what it adds: expansion, more than 800W of solar, generator or alternator charging, or an Anderson port. Otherwise the Ultra runs the same loads for the same time.
Can either power a house?
Through a manual transfer switch or an inlet box via the 30A outlet, at 120V and up to 3,600W. Neither delivers 240V.
Are they the same size?
Nearly: 72.1 lb for the Ultra and 74.3 lb for the Ultra Plus, with the same footprint and wheels.
Do reviews confirm the rated capacity?
Ultra: no independent capacity measurement we could verify. Ultra Plus: A full discharge delivered 2.61kWh from the 3,072Wh pack, about 85 percent (StorageReview). Inverter losses usually take 10 to 20% on AC, which is why our calculator uses 85% of the rating.
How loud are the Ultra and the Ultra Plus?
EcoFlow rates the Ultra at 25dB or less at 600W, measured at 1 m and the Ultra Plus at 25dB or less at 600W, measured at 1 m. Fans ramp up mostly during fast charging and near full output; capping the charging speed in the app is the easiest way to keep either quiet at night.
Do I have to register for the 5-year warranty?
Ultra: 3 years, 5 after app registration. Ultra Plus: 3 years, 5 after app registration. Where the extension depends on registration, do it in the EcoFlow app as soon as the unit arrives.
Is there an independent test of the DELTA 3 Ultra itself?
Not one we could verify as of October 30, 2026. The published tests we cite cover the Ultra Plus, which shares the Ultra’s 3,072Wh battery and 3,600W inverter; the Ultra adds no ports of its own.
Can I add an extra battery to the DELTA 3 Ultra later?
No. EcoFlow’s US comparison table lists no expansion for the Ultra. The Ultra Plus takes up to two DELTA Pro 3 Extra Batteries for about 11kWh.
Related comparisons and reviews
How we compared and sources
Research-based comparison. We have not physically tested these two units. Specs come from EcoFlow US documentation; usage observations are attributed to named reviewers. Prices and availability were checked on October 30, 2026.
- Specs: EcoFlow US, DELTA 3 Ultra and EcoFlow US, DELTA 3 Ultra Plus, including their side-by-side table, read on October 30, 2026.
- Reviewer reports on the Ultra Plus: StorageReview, Dylan Dougherty, September 2025, Digital Trends, Ian Bell, July 2026, How-To Geek, Cory Gunther, October 2025.
- Runtime = 3,072Wh × 0.85 ÷ watts. Solar harvest = min(panel watts, max input) × sun hours × 0.70.
Same 3,072Wh and 3,600W. The Ultra Plus adds expansion, 1,600W solar and faster generator charging for $300 more.
Prices checked November 5, 2026 at 7:29 AM EST
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Originally published: November 3, 2026