DELTA 3 Plus
- you’ll carry it: 27.6 lb
- you want a 56-minute refill
- you’ll start at 1kWh and add batteries
DELTA 3 Ultra Plus
- your RV takes a TT-30 plug
- you run 3,600W, 7,200W surge
- you want 3,072Wh now, 11kWh later
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.
Buy the battery for the outage you actually get, not the one in the brochure.
The EcoFlow DELTA 3 Plus stores 1,024Wh and delivers 1,800W from six outlets at 27.6 lb, refills from the wall in 56 minutes and takes extra batteries up to about 5kWh. The EcoFlow DELTA 3 Ultra Plus stores 3,072Wh and delivers 3,600W with a 7,200W surge, adds a TT-30 RV outlet, a 30A Anderson port, 1,600W of solar and 3,200W generator charging, and grows to about 11kWh, at 74.3 lb. Prices sit $880 apart today. If your outages last an evening and nothing draws more than 1,800W, the Plus is enough; for a full day, an RV or a kitchen running at once, the Ultra Plus.
Below: the differences with numbers, a 20-second calculator for your own gear, eight modeled situations, two ways to reach 3kWh and beyond, a middle option, and what published tests found on each.
The Ultra Plus stores three times the energy, delivers twice the output, adds a TT-30 and an Anderson port and takes 600W more solar. The DELTA 3 Plus weighs 46.7 lb less, refills faster and carries an IP65 battery pack. Prices sit $880 apart today.
- you carry it: 27.6 lb
- you want it full in 56 min
- 1kWh now, more later
- your RV uses a TT-30
- you run 3,600W
- you want 3kWh from day one
The five differences that decide it
Both use LFP cells, the EcoFlow app over Wi-Fi and Bluetooth, X-Boost for heating loads, a 10ms UPS, Storm Guard, a 12V car socket and an extra-battery port that takes the DELTA Pro 3 Extra Battery. These five gaps decide it.
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. About 870Wh usable on the DELTA 3 Plus and 2,611Wh on the Ultra Plus; StorageReview measured 910Wh and 2.61kWh out of them.
Appliance for appliance, the Ultra Plus lasts 3.0 times as long as the Plus.
Same appliance, same watts: the gap is always the size of the battery.Get our Black Friday alerts for EcoFlow
We track live prices on 40+ models from Jackery, EcoFlow, BLUETTI and Anker SOLIX. When a deal beats the lowest price we've recorded, you'll hear from us. During Black Friday week, one short recap a day at most.
Unsubscribe in one click. We may earn a commission when you buy through our links, at no extra cost to you. Privacy Policy
The price gap, in numbers
The EcoFlow DELTA 3 Ultra Plus costs $880 more than the EcoFlow DELTA 3 Plus and adds 2,048Wh: that is $0.43 per extra Wh, against $0.70 per Wh for the Plus.
Prices refresh daily from EcoFlow US.What the $880 buys: three times the battery (3,072Wh vs 1,024Wh), 3,600W instead of 1,800W and a TT-30.
Ultra Plus alone (3,072Wh) costs $1,019 less today.
EcoFlow lists the DELTA Pro 3 Extra Battery for both stations, so one bought for a DELTA 3 Plus moves to an Ultra Plus later. A DELTA 3 Plus with that battery holds more energy than an Ultra Plus alone, but stays at 1,800W with no TT-30 and 1,000W of solar. EcoFlow US prices move often; the figures here are refreshed daily by our price engine.
The third option: the DELTA 3 Max Plus at $1,149
EcoFlow DELTA 3 Max Plus: $1,149 today
The middle of the family: 2,048Wh and 3,000W from four 20A outlets, a 30A Anderson port, 1,000W of solar, 0 to 80% from the wall in 64 minutes and expansion to about 10kWh, at 48.7 lb. It has no TT-30, like the Plus. See the DELTA 3 Max Plus at EcoFlow.
Eight modeled situations, worked out
Same formula as the calculator above: 85% of the rated capacity, no extra battery. The fridge averages 60W, about 525kWh a year.
24-hour outage, essentials only
The Ultra Plus covers a full day; the DELTA 3 Plus gets you through the evening and the night.
Microwave, coffee maker and space heater
Only the Ultra Plus carries all three, with no headroom. On the DELTA 3 Plus, run one at a time.
RV with a 30A inlet
The Ultra Plus takes the cord directly. The DELTA 3 Plus needs an adapter to a standard outlet and its 1,800W limit, so the RV’s air conditioner is out.
A full-size fridge, nothing else
About 14 hours on the Plus, close to two days on the Ultra Plus. Digital Trends ran a garage freezer for nearly three days on an Ultra Plus.
CPAP, every night
Two to three nights on the Plus, about eight on the Ultra Plus. T3 found the Plus’s fans cycling at light loads, so try it in the bedroom first.
Refill from solar, each at its maximum
The Plus fills in an afternoon; the Ultra Plus needs about twice as long but banks three times the energy, and can add a Smart Generator for 3,960W combined.
Refill from the wall before a storm
The Plus is full before the Ultra Plus reaches 80%. Digital Trends and How-To Geek needed about 1 hour 40 minutes to fill an Ultra Plus, and How-To Geek’s started at 200W until changed in the app.
Moving it
The Plus is a one-person carry. How-To Geek called the Ultra Plus big and heavy; plan for two people or a cart.
Ten more differences, the spec sheet and the box
Smaller gaps that rarely decide the purchase, then the full specifications and what ships in the box.
DELTA 3 Plus and DELTA 3 Ultra Plus weight, dimensions and full specifications
Weight: 27.6 lb for the DELTA 3 Plus and 74.3 lb for the DELTA 3 Ultra Plus. Dimensions: 16 × 8.0 × 11 in and 24.1 × 12.9 × 15.5 in. Everything else is in the sheet below.
EcoFlow DELTA 3 Plus and EcoFlow 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 Plus
- DELTA 3 Plus power station1,024Wh, 27.6 lb
- AC charging cable
- Manuals and warranty card
- Solar cable sold separatelyincluded with the applicable solar bundles
- No extra battery, no Alternator Chargerboth sold separately; EcoFlow sells bundles
DELTA 3 Ultra Plus
- DELTA 3 Ultra Plus3,072Wh, 74.3 lb
- AC charging cable
- Manuals and warranty card
- No solar or car cablesold separately
- Extra battery and adapter sold separately
From the EcoFlow US product pages; bundles add the matching cables.
07 · ChargingHow fast each one refills
Shorter bar, faster refill. Each row is scaled to its slower unit.
DELTA 3 Plus: StorageReview measured 1,180Wh drawn from the wall for a full refillUltra Plus: StorageReview measured 3.54kWh drawn from the wall for a full refill
Our solar times assume panels deliver 70% of their rating; the brands’ figures assume ideal sun.
Every port, side by side
DELTA 3 Plus
DELTA 3 Ultra Plus
Practical consequence: the Ultra Plus adds the TT-30 for an RV, four 20A outlets and a 30A Anderson port for 12V gear. The DELTA 3 Plus has six standard outlets and keeps two DC5521 barrels; both have a 12V car socket and a 140W USB-C.
09 · NoiseNoise and heat: Plus vs Ultra Plus
The EcoFlow DELTA 3 Ultra Plus has the better record: EcoFlow rates it at 25dB or less at 600W, and Digital Trends found its fans unnoticeable even at full load. The EcoFlow DELTA 3 Plus is rated under 30dB at 600W, but T3 and Trusted Reviews found its fans running even at light loads.
EcoFlow’s figures, measured at 1 m. Reviewers gave no dB values.Every figure we found, with its source
What reviewers heard: Fans ran once a port was on and cycled about every minute (T3); they ran even at low loads (Trusted Reviews, UK unit); the unit got warmer than expected on light loads (How-To Geek).
What reviewers heard: Fan noise stayed unnoticeable even under full load (Digital Trends).
Measured by a tester Brand figure
- The fans run hardest while fast charging, so lower the charging speed in the app at night.
Cold and heat: Plus vs Ultra Plus
EcoFlow US doesn’t publish its temperature ranges for the EcoFlow DELTA 3 Plus. The EcoFlow DELTA 3 Ultra Plus charges from 32°F to 113°F and runs from 14°F to 113°F. Only the DELTA 3 Plus’s battery pack carries a water rating, IP65.
Figures from EcoFlow US; EcoFlow US doesn’t publish its temperature ranges for the DELTA 3 Plus.- In a garage in winter, bring either one inside to charge: the Ultra Plus doesn’t charge below 32°F, and EcoFlow US doesn’t publish the DELTA 3 Plus’s ranges.
- Run the Ultra Plus between 68°F and 86°F when you can: EcoFlow’s optimal operating range.
App, UPS and smart features
The EcoFlow DELTA 3 Plus and the EcoFlow DELTA 3 Ultra Plus share the app, Storm Guard and a 10ms UPS. The Ultra Plus adds Smart Output Priority and a bigger Smart Generator link, up to 3,200W.
Same app and UPS. The gap is generator power and output priority.Green zone: a switch under about 16ms, which most desktop PCs ride through without restarting.
Can it keep only the essentials running? The EcoFlow DELTA 3 Ultra Plus switches off non-priority outlets at a battery level you choose. EcoFlow lists no such feature for the EcoFlow DELTA 3 Plus.
Does it work as a UPS? Both switch in under 10ms; StorageReview measured just over 8ms on the EcoFlow DELTA 3 Plus and 8.25ms on the EcoFlow DELTA 3 Ultra Plus.
Can you add a battery later? Both take the DELTA Pro 3 Extra Battery: the EcoFlow DELTA 3 Plus to about 5kWh, the EcoFlow DELTA 3 Ultra Plus to about 11kWh with two.
How much can a generator put in? The EcoFlow DELTA 3 Ultra Plus charges from an EcoFlow Smart Generator at up to 3,200W; the EcoFlow DELTA 3 Plus at 1,500W through its XT150 port.
Does it prepare for storms? Both charge ahead of severe weather once the feature is on in the EcoFlow app.
Can it charge off-peak? Both charge off-peak from the EcoFlow app; on the EcoFlow DELTA 3 Ultra Plus this needs app V6.15+ and firmware V7.80.99.52+.
How does the app connect? Both use the EcoFlow app over Wi-Fi and Bluetooth.
Warranty and support
EcoFlow’s US warranty table gives the EcoFlow DELTA 3 Plus 5 years with no condition. The EcoFlow DELTA 3 Ultra Plus gets 3 years, plus 2 more once registered in the EcoFlow app.
Same 5 years at best; only the Ultra Plus needs the app.Subject to each brand’s warranty terms and eligibility.
EcoFlow rates the DELTA 3 Plus at 4,000 cycles to 80%, about 11 years at one full cycle a day. For the Ultra Plus it publishes no cycle count, only 10 years of use. Calendar aging and heat also reduce capacity.
- Register the Ultra Plus in the EcoFlow app the day it arrives: without registration, its warranty stops at 3 years.
What reviewers report
We have not lab-tested these two units. Here is what 8 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.
DELTA 3 Plus: StorageReview (January 2025), Trusted Reviews (February 2025, UK unit), How-To Geek (January 2025), T3 (January 2025), TechRadar (February 2025)DELTA 3 Ultra Plus: StorageReview (September 2025), Digital Trends (July 2026), How-To Geek (October 2025)
Usable capacity
- PlusReviewer A full discharge delivered 910Wh from the 1,024Wh pack, about 89 percent. StorageReview, Dylan Dougherty, January 2025
- PlusReviewer A 1,000W heater ran almost exactly one hour and drew 888Wh, about 87 percent of rated capacity. Trusted Reviews, Harry Duncton, February 2025, UK unit
- Ultra PlusReviewer A full discharge delivered 2.61kWh from the 3,072Wh pack, about 85 percent. StorageReview, Dylan Dougherty, September 2025
Charging
- PlusReviewer Refilling from empty took 1,180Wh from the wall, about 87 percent charging efficiency. StorageReview, Dylan Dougherty, January 2025
- PlusReviewer A full mains charge at 1,500W took 55 minutes and used 1,109Wh, about 92 percent efficient. Flag: UK 230V charging. Trusted Reviews, Harry Duncton, February 2025, UK unit
- PlusReviewer AC input peaked at 1,500W but mostly held 1,350 to 1,400W; the battery was full within an hour. How-To Geek, Mark LoProto, January 2025
- 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
- PlusReviewer Fans tended to run even at low loads, which the reviewer found distracting. Trusted Reviews, Harry Duncton, February 2025, UK unit
- PlusReviewer With a 700W vacuum running, the station fan was still audible over the vacuum. How-To Geek, Mark LoProto, January 2025
- PlusReviewer The unit got warmer than expected even on light loads, and the reviewer questions its temperature control. How-To Geek, Mark LoProto, January 2025
- PlusReviewer Fans ran constantly once a port was on, even with nothing plugged in, despite the sub-600W quiet claim. T3, Matt Kollat, January 2025
- Ultra PlusReviewer Fan noise stayed unnoticeable even under full load. Digital Trends, Ian Bell, July 2026
UPS and output
- PlusReviewer Measured UPS transfer time was just over 8ms with a workstation load, inside EcoFlow’s 10ms claim. StorageReview, Dylan Dougherty, January 2025
- PlusReviewer In simulated outages the router, modem, computer and monitor stayed on without any blips. TechRadar, Collin Probst, February 2025
- 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
- PlusReviewer The app showed the unit charging at about 1.45kW against its 1500W rating. StorageReview, Dylan Dougherty, January 2025
- PlusReviewer Only three of the AC outlets are three-pronged, listed as the main drawback. TechRadar, Collin Probst, February 2025
- 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 DELTA 3 Plus has no TT-30. A 30A RV cord needs an adapter, and 1,800W won’t run an RV air conditioner and much else.
- The Ultra Plus weighs 74.3 lb. How-To Geek called it big and heavy; plan where it lives.
- Check the Ultra Plus’s charging setting. How-To Geek’s unit charged at 200W out of the box, and the full 1,800W setting tripped a garage GFCI outlet.
- The Ultra Plus’s Anderson port and car socket share 378W.
- The DELTA 3 Plus’s fans run at light loads, per T3 and Trusted Reviews.
- X-Boost is for heating loads only. Motors need the continuous rating: 1,800W or 3,600W.
- Register the Ultra Plus in the app for the full 5 years; without it, 3.
- Neither delivers 240V.
Frequently asked questions
What is the difference between the EcoFlow DELTA 3 Plus and the DELTA 3 Ultra Plus?
Size. The Ultra Plus stores 3,072Wh and delivers 3,600W, with a TT-30, an Anderson port, 1,600W of solar and 3,200W generator charging, at 74.3 lb. The DELTA 3 Plus stores 1,024Wh and delivers 1,800W, with 1,000W of solar, at 27.6 lb.
Can they share extra batteries?
Yes: EcoFlow lists the DELTA Pro 3 Extra Battery for both. On the DELTA 3 Plus it brings the total to about 5kWh; the Ultra Plus takes two, for about 11kWh.
Which is better for an RV?
The Ultra Plus, thanks to its TT-30 and 3,600W. The DELTA 3 Plus needs an adapter for a 30A cord and stops at 1,800W.
Which charges faster from the wall?
The DELTA 3 Plus: full in 56 minutes at 1,500W. The Ultra Plus reaches 80% in 89 minutes at 1,800W.
How long will each run a refrigerator?
At a 60W average: about 14.5 hours on the DELTA 3 Plus and 43.5 hours on the Ultra Plus.
Can the DELTA 3 Plus run a microwave?
Yes, a 1,100W microwave runs on its 1,800W inverter, for about 47 minutes on a full battery. It can’t run a microwave, a coffee maker and a heater at once.
Do either deliver 240V?
No. Both are 120V stations.
Is there a middle option?
The DELTA 3 Max Plus: 2,048Wh and 3,000W from four 20A outlets, an Anderson port, 1,000W of solar and expansion to about 10kWh, at 48.7 lb.
Related comparisons and reviews
How we compared and sources
Research-based comparison. We have not physically tested these two units. Specs come from the EcoFlow US product pages and warranty table; usage observations are attributed to named reviewers. Prices and availability were checked on October 31, 2026.
- Specs: EcoFlow US, DELTA 3 Plus, and EcoFlow US, DELTA 3 Ultra Plus, read on October 31, 2026; warranty terms from the EcoFlow US warranty policy.
- Reviewer reports on the DELTA 3 Plus: StorageReview, Dylan Dougherty, January 2025, Trusted Reviews, Harry Duncton, February 2025, UK unit, How-To Geek, Mark LoProto, January 2025, T3, Matt Kollat, January 2025, TechRadar, Collin Probst, February 2025; on the DELTA 3 Ultra Plus: StorageReview, Dylan Dougherty, September 2025, Digital Trends, Ian Bell, July 2026, How-To Geek, Cory Gunther, October 2025.
- Runtime = capacity × 0.85 ÷ watts. Solar harvest = min(panel watts, max input) × sun hours × 0.70. Cost per lifetime kWh = price ÷ (cycles × capacity in kWh).
The Ultra Plus triples the battery, doubles the output and adds a TT-30; the DELTA 3 Plus is 46.7 lb lighter and refills sooner. Prices sit $880 apart.
Prices checked November 5, 2026 at 7:29 AM EST
Looking at other models? Browse all power station comparisons, or pick any two models on the hub and we point you to the right duel.
Originally published: November 4, 2026