DELTA 3 1000 Air
- you already own one: it still covers a router, a CPAP or a laptop
- you carry it: 22 lb
- every load stays under 500W
DELTA 3 Ultra
- you need a full day of backup: 3,072Wh
- your RV takes a TT-30 plug
- you run 3,600W at once
Prices and stock checked by our price engine on November 13, 2026 at 6:29 AM EST. Each product is rechecked several times a day; the time refreshes when you load the page.
One is a UPS for your router. The other runs the house.
The EcoFlow DELTA 3 1000 Air stores 960Wh and delivers 500W from a single AC outlet in a 22 lb cube, with a 10ms UPS; EcoFlow US no longer sells it and redirects its page to the DELTA 3 Classic. The EcoFlow DELTA 3 Ultra stores 3,072Wh and delivers 3,600W with a 7,200W surge from four 20A outlets and a TT-30 RV outlet, adds a 12V car socket and 800W of solar, at 72.1 lb; neither takes an extra battery. If you own an Air for a router or a CPAP, it still does that job; for a full day of outage, an RV or the kitchen, the Ultra is in another class.
Below: the five differences with numbers, a 20-second calculator for your own gear, eight modeled situations, what the current options cost, a middle option, and what we could and couldn’t verify.
If you’re buying today, the Ultra or the DELTA 3 Classic that EcoFlow US offers in the Air’s place: the Air is no longer sold. Against the Air, the Ultra stores three times the energy, delivers seven times the wattage from five outlets including a TT-30, adds a 12V socket and 300W more solar. The Air weighs 50.1 lb less. Both switch in 10ms or less.
- it already guards a router or CPAP
- you carry it: 22 lb
- one outlet and 500W are enough
- you need 3kWh in one box
- your RV uses a TT-30
- you run 3,600W
The five differences that decide it
Both use LFP cells, switch to battery in 10ms or less and work with the EcoFlow app over Wi-Fi and Bluetooth. Neither takes an 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 816Wh usable on the 1000 Air and 2,611Wh on the Ultra. A load above 500W does not run on the Air at all.
Appliance for appliance, the Ultra lasts 3.2 times as long as the 1000 Air.
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What the current options cost today
EcoFlow US sends 1000 Air shoppers to the DELTA 3 Classic: same 10ms UPS, 1,800W from three outlets, 26.6 lb. The Max doubles that battery, and the Ultra triples it with an RV outlet.
The third option: the DELTA 3 Max at $879
EcoFlow DELTA 3 Max: $879 today
Halfway between the two: 2,048Wh and 2,400W with a 4,800W surge from four 20A outlets, a 126W car socket, a 10ms UPS, 500W of solar and 68 minutes to 80% from the wall, at 44.8 lb. Like the Ultra it takes no extra battery and has no TT-30. Our DELTA 3 Max review goes deeper. See the DELTA 3 Max at EcoFlow.
Eight modeled situations, worked out
Same formula as the calculator above. Neither takes an extra battery. The fridge averages 60W, about 525kWh a year.
24-hour outage, essentials only
The Air gets you through an evening on a power strip kept under 500W; the Ultra covers the whole day and then some.
CPAP, every night
Two nights and a half on the Air, about eight on the Ultra. Both switch in 10ms or less if the grid drops.
A microwave during an outage
1,100W is more than twice the Air’s rating, and X-Boost only helps heating elements. The Ultra runs it for over two hours of total cooking time.
An RV on a 30A cord
The Ultra’s TT-30 takes the RV’s shore cord directly. The Air would need an adapter and couldn’t carry more than 500W.
Microwave and coffee maker at once
Only the Ultra runs both at once.
Refill from solar, each at its maximum
The Air refills in one good afternoon; the Ultra needs most of a sunny day, with three times the battery to fill.
Refill from the wall before a storm
The Ultra puts three times as much energy back in about the same time, at 1,800W.
Moving it
The Air is a one-hand carry. The Ultra is a two-person lift, or a station that lives on a cart.
Nine 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 1000 Air and DELTA 3 Ultra weight, dimensions and full specifications
Weight: 22 lb for the DELTA 3 1000 Air and 72.1 lb for the DELTA 3 Ultra. Dimensions: 8.7 × 8.8 × 10.4 in and 24.6 × 12.9 × 15.5 in. 1000 Air figures come from EcoFlow’s archived US page.
EcoFlow DELTA 3 1000 Air and EcoFlow DELTA 3 Ultra full specifications
Every published figure for both units, grouped. Green marks the better value.
What’s in the box
DELTA 3 1000 Air
- DELTA 3 1000 Air960Wh, 22 lb
- AC charging cable
- Quick start guide, safety instructions and warranty card
DELTA 3 Ultra
- DELTA 3 Ultra3,072Wh, 72.1 lb
- AC charging cable
- Manuals and warranty card
- No solar or car cablesold separately
1000 Air box contents from EcoFlow Canada’s page for the same 120V model; DELTA 3 Ultra from EcoFlow US.
07 · ChargingHow fast each one refills
Shorter bar, faster refill. Each row is scaled to its slower unit.
1000 Air: X-Stream AC charging, input watts not publishedUltra: EcoFlow US gives 0 to 80% in 1.48 hours at 1,800W
Our solar times assume panels deliver 70% of their rating; the brands’ figures assume ideal sun.
Every port, side by side
DELTA 3 1000 Air
DELTA 3 Ultra
Practical consequence: the Air has one AC outlet and two small USB ports, enough for a router and a phone. The Ultra adds four 20A outlets, a TT-30, a 140W USB-C and a 12V car socket.
09 · NoiseNoise: 1000 Air vs Ultra
EcoFlow rates the EcoFlow DELTA 3 1000 Air at Under 39dB load not stated and the EcoFlow DELTA 3 Ultra at 25dB or less at 600W.
EcoFlow’s figures first; reviewer reports where we found one.Every figure we found, with its source
Measured by a tester Brand figure
- Lower the AC charging speed in the EcoFlow app overnight: the fans run hardest while fast charging.
Cold and heat: 1000 Air vs Ultra
The EcoFlow DELTA 3 1000 Air and the EcoFlow DELTA 3 Ultra share the same limits: charging from 32°F to 113°F, running from 14°F to 113°F. Neither carries a water rating.
Figures from EcoFlow’s archived 1000 Air page and EcoFlow US for the DELTA 3 Ultra.- Charge either one indoors in winter: neither charges below 32°F.
- Run it between 68°F and 86°F when you can: EcoFlow’s optimal operating range.
App, UPS and smart features
The EcoFlow DELTA 3 Ultra does more: Storm Guard and a Smart Generator link.
Same EcoFlow app over Wi-Fi and Bluetooth.Green zone: a switch under about 16ms, which most desktop PCs ride through without restarting.
Does it prepare for storms? The EcoFlow DELTA 3 Ultra charges ahead of severe weather with Storm Guard; EcoFlow lists no such feature for the EcoFlow DELTA 3 1000 Air.
Does it work with EcoFlow’s Smart Generator? The EcoFlow DELTA 3 1000 Air has no Smart Generator link listed; the EcoFlow DELTA 3 Ultra charges from an EcoFlow Smart Generator at up to 1,600W.
Does it work as a UPS? The EcoFlow DELTA 3 1000 Air switches in 10ms, at up to 500W; the EcoFlow DELTA 3 Ultra switches in under 10ms.
Can you add a battery later? The EcoFlow DELTA 3 1000 Air has no extra battery port; the EcoFlow DELTA 3 Ultra can’t be expanded: EcoFlow lists its max scalability as 0.
How does the app connect? Both use the EcoFlow app over Wi-Fi and Bluetooth for monitoring, charge limits and output control.
Warranty and support
EcoFlow gives the EcoFlow DELTA 3 1000 Air 2 years, as listed when it was sold, and the EcoFlow DELTA 3 Ultra 3 years, plus 2 more once registered in the EcoFlow app. A DELTA 3 1000 Air you already own keeps the term it was sold with.
The DELTA 3 Ultra has the longer term once registered.Subject to each brand’s warranty terms and eligibility.
For the DELTA 3 1000 Air, no cycle count; EcoFlow cited 3,219.84kWh delivered over 10 years in its own lab, roughly 3,350 full charges of 960Wh. For the DELTA 3 Ultra, no cycle count on its US page; EcoFlow quotes 10 years of reliable power. Heat and calendar age also wear a battery, so read any rating as a ceiling.
- If you choose the EcoFlow DELTA 3 Ultra, register it 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, and as of October 31, 2026 we found no published hands-on test of either the DELTA 3 1000 Air or the plain DELTA 3 Ultra that meets our sourcing rules: no named author, unit and date we could check. Every figure on this page for these two models therefore comes from EcoFlow’s US pages, live or archived. Hands-on reviews of the DELTA 3 Ultra Plus exist, but it has twice the solar input, an Anderson port and a battery port, so we don’t carry its results over.
Practical limits before you buy
- EcoFlow US no longer sells the DELTA 3 1000 Air. Its US page now redirects to the DELTA 3 Classic; check any seller’s warranty terms before buying one.
- 500W is the Air’s hard limit. Microwaves, kettles, coffee makers, hair dryers and space heaters overload it.
- Neither can be expanded. For 3kWh that grows, look at the DELTA 3 Ultra Plus.
- The Ultra weighs 72.1 lb. Plan where it lives before an outage.
- The Ultra’s TT-30 is 120V. It runs an RV’s 30A system, not a 240V well pump.
- X-Boost is for heating loads only. Motors need the continuous rating: 500W or 3,600W.
- Register the Ultra in the app for its full 5 years; without it, 3.
Frequently asked questions
What is the difference between the DELTA 3 1000 Air and the DELTA 3 Ultra?
The Ultra stores 3,072Wh against 960Wh, delivers 3,600W against 500W, has five AC outlets including a TT-30 against one, and adds a 12V car socket. The Air weighs 22 lb against 72.1 lb, and EcoFlow US no longer sells it.
Is the DELTA 3 1000 Air still sold?
Not by EcoFlow US: its page now redirects to the DELTA 3 Classic.
Can the 1000 Air run a microwave?
No. A typical microwave draws over 1,000W, twice the Air’s 500W rating. The Ultra runs a 1,100W microwave for over two hours of total cooking time.
Can either one be expanded?
No. The Air has no battery port, and EcoFlow lists the Ultra’s max scalability as 0.
How long will each run a refrigerator?
At a 60W average: about 13.6 hours on the Air and 43.5 hours on the Ultra.
Which is better as a UPS?
Both switch in 10ms or less. The Ultra carries up to 3,600W through the switch, the Air 500W.
How much do they weigh?
22 lb for the 1000 Air and 72.1 lb for the Ultra.
Is there a middle option?
The DELTA 3 Max: 2,048Wh and 2,400W from four outlets, a 12V socket and a 10ms UPS, at 44.8 lb.
Related comparisons and reviews
How we compared and sources
Research-based comparison. We have not physically tested these two units. EcoFlow US no longer sells the DELTA 3 1000 Air and redirects its page to the Classic, so its specs come from that US page as archived on March 19, 2026; DELTA 3 Ultra specs from EcoFlow US. Checked on October 31, 2026.
- Specs: EcoFlow US, DELTA 3 1000 Air (archived March 19, 2026), and EcoFlow US, DELTA 3 Ultra, read on October 31, 2026; warranty terms from the EcoFlow US warranty policy.
- 1000 Air outlet count and box contents: EcoFlow’s official product photos and EcoFlow Canada’s page for the same 120V model; EcoFlow’s spec table lists no AC outlet count.
- 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 triples the battery, runs 3,600W and adds a TT-30; the 1000 Air, no longer sold by EcoFlow US, is a 22 lb 500W UPS.
Prices checked November 13, 2026 at 6:29 AM EST
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Originally published: November 9, 2026