DELTA 3 1000 Air
- you already own one: it still covers a router, a CPAP or a laptop
- you want the lightest box: 22 lb
- every load stays under 500W
DELTA 3 Plus
- you run a microwave, kettle or heater: 1,800W
- you plug in six devices and 12V gear
- you’ll add a battery later, up to 5kWh
Prices and stock checked by our price engine on November 13, 2026 at 5:31 AM EST. Each product is rechecked several times a day; the time refreshes when you load the page.
Same kilowatt-hour, more than three times the power, and six times the outlets.
The EcoFlow DELTA 3 1000 Air stores 960Wh but delivers only 500W from a single AC outlet, with one USB-C and one USB-A port, in a 22 lb cube; EcoFlow US no longer sells it and redirects its page to the DELTA 3 Classic. The EcoFlow DELTA 3 Plus stores 1,024Wh and delivers 1,800W from six outlets, adds a 12V car socket, two DC barrels, 1,000W of solar on two ports and a battery port for about 5kWh, at 27.6 lb, with 5 years of warranty. Both switch to battery in 10ms. If your Air already guards a router or a CPAP, it still does that job; buying new, the Plus does everything the Air did and runs the kitchen too.
Below: the five differences with numbers, a 20-second calculator for your own gear, eight modeled situations, what the current options cost, a third option, and what published tests found.
If you’re buying today, buy the DELTA 3 Plus, or the Classic that EcoFlow US now offers in the Air’s place. Against the Air, the Plus delivers more than three times the wattage from six outlets, adds 12V outputs, twice the solar input and a battery port, refills in under an hour and carries 5 years of warranty instead of 2. The Air is 5.6 lb lighter.
- it already guards a router or CPAP
- you carry it often: 22 lb
- one outlet and 500W are enough
- you need 1,800W for kitchen gear
- you use 12V gear
- you’ll grow to 5kWh
The five differences that decide it
Both use LFP cells, switch to battery in 10ms and work with the EcoFlow app over Wi-Fi and Bluetooth. Their batteries are within 64Wh of each other. These five gaps decide the purchase.
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 870Wh on the DELTA 3 Plus. A load above 500W does not run on the Air at all.
Appliance for appliance, the Plus lasts 7% longer than 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, no 12V and no battery port. The DELTA 3 and the DELTA 3 Plus add six outlets, 12V outputs and a battery port; the Plus also doubles the solar input.
The third option: the DELTA 3 at $579
EcoFlow DELTA 3: $579 today
Most of the Plus: the same 1,024Wh, 1,800W and six AC outlets, a 126W car socket, two DC barrels, a 10ms UPS, a 56-minute wall refill and a battery port to about 5kWh, at 27.6 lb with 5 years of warranty. It takes 500W of solar on one port instead of 1,000W on two. OutdoorGearLab measured 870Wh out of it and a full wall charge in about 50 minutes. Our DELTA 3 review goes deeper. See the DELTA 3 at EcoFlow.
Eight modeled situations, worked out
Same formula as the calculator above, with no extra battery. The fridge averages 60W, about 525kWh a year.
24-hour outage, essentials only
Nearly the same: an evening and part of the night on either. The Air needs a power strip for these plugs, kept under 500W.
CPAP, every night
Both carry a CPAP for two nights and a half, and both switch in 10ms if the grid drops while it runs through the unit.
A microwave during an outage
1,100W is more than twice the Air’s 500W rating, and X-Boost only helps heating elements that tolerate lower voltage. The Plus runs it.
Six plugs at once
The Plus takes all six. On the Air, add a power strip and keep the total under 500W.
A 12V fridge in a van
The Plus feeds it straight from its 126W car socket or a DC barrel. The Air has no 12V output, so the fridge runs through its AC outlet and its own adapter.
Refill from solar, each at its maximum
The Plus takes twice the panels on two ports and refills in about half the time. EcoFlow quotes 70 minutes for the Plus in ideal sun.
A 1,500W space heater on high
Beyond the Air’s 800W X-Boost. The Plus runs it, but drains in about half an hour: treat it as a bridge.
Growing the system
Only the Plus takes extra batteries: DELTA 3, DELTA 2, DELTA 2 Max or DELTA Pro 3 units.
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 Plus weight, dimensions and full specifications
Weight: 22 lb for the DELTA 3 1000 Air and 27.6 lb for the DELTA 3 Plus. Dimensions: 8.7 × 8.8 × 10.4 in and 16 × 8.0 × 11 in. 1000 Air figures come from EcoFlow’s archived US page.
EcoFlow DELTA 3 1000 Air and EcoFlow DELTA 3 Plus 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 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
1000 Air box contents from EcoFlow Canada’s page for the same 120V model; DELTA 3 Plus 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 publishedDELTA 3 Plus: two XT60i solar ports, 500W each
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 Plus
Practical consequence: the Air has one AC outlet and two small USB ports, enough for a router and a phone. The Plus adds five more outlets, a 140W USB-C, a car socket, two DC barrels and a battery port.
09 · NoiseNoise: 1000 Air vs Plus
EcoFlow rates the EcoFlow DELTA 3 1000 Air at Under 39dB load not stated and the EcoFlow DELTA 3 Plus at Under 30dB at 600W.
EcoFlow’s figures first; reviewer reports where we found one.Every figure we found, with its source
What reviewers heard: Fans ran even at light loads (T3, Trusted Reviews).
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 Plus
The EcoFlow DELTA 3 1000 Air charges from 32°F to 113°F and runs from 14°F to 113°F. EcoFlow US doesn’t publish its temperature ranges for the EcoFlow DELTA 3 Plus, so charge it above freezing too. Only the DELTA 3 Plus’s battery pack carries an IP65 rating.
Figures from EcoFlow’s archived 1000 Air page; EcoFlow US publishes no temperature range for the DELTA 3 Plus.- Charge either one indoors in winter: the 1000 Air doesn’t charge below 32°F, and EcoFlow US publishes no charging range for the DELTA 3 Plus.
- 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 Plus does more: expansion, 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.
Can you add a battery later? The EcoFlow DELTA 3 1000 Air has no extra battery port; the EcoFlow DELTA 3 Plus takes DELTA 3, DELTA 2, DELTA 2 Max or DELTA Pro 3 extra batteries, to about 5kWh.
Does it prepare for storms? The EcoFlow DELTA 3 Plus 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 Plus charges from an EcoFlow Smart Generator at up to 1,500W.
Does it work as a UPS? The EcoFlow DELTA 3 1000 Air switches in 10ms, at up to 500W; the EcoFlow DELTA 3 Plus switches in 10ms, and StorageReview measured just over 8ms.
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 Plus 5 years with nothing to register. A DELTA 3 1000 Air you already own keeps the term it was sold with.
The DELTA 3 Plus has the longer term without registering.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 Plus, 4,000 cycles to 80%, about 11 years at one full cycle a day. Heat and calendar age also wear a battery, so read any rating as a ceiling.
What reviewers report
We have not lab-tested these two units, and we found no independent test of the 1000 Air. Here is what 5 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 1000 Air: no verifiable independent test foundDELTA 3 Plus: StorageReview (January 2025), Trusted Reviews (February 2025, UK unit), How-To Geek (January 2025), T3 (January 2025), TechRadar (February 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
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
- PlusReviewer The 800W car charging input did not reach 800W on the reviewer’s older car. How-To Geek, Mark LoProto, January 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
- PlusReviewer Fans cycled on rhythmically about every minute, which hurts its use as a quiet desk UPS. T3, Matt Kollat, January 2025
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
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
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.
- X-Boost is for heating loads only. It lowers the voltage to keep a heating element running; motors and electronics need the rated 500W or 1,800W.
- The Air has one AC outlet and no 12V output. Plan a power strip, and keep the total under 500W.
- The Plus weighs 27.6 lb, 5.6 lb more than the Air.
- The Plus’s IP65 rating covers the battery pack only, not the whole station.
- Neither ships with a solar cable.
Frequently asked questions
Is the DELTA 3 Plus an upgrade over the DELTA 3 1000 Air?
On almost every number: 1,800W against 500W, six outlets against one, 12V outputs, 1,000W of solar against 500W, a battery port and 5 years of warranty against 2. The Air is 5.6 lb lighter.
Is the DELTA 3 1000 Air still sold?
Not by EcoFlow US: its page now redirects to the DELTA 3 Classic.
Do they have the same battery?
Close: 960Wh against 1,024Wh, both LFP. The difference in runtime is about 6 percent.
Can the 1000 Air run a microwave?
No. A typical microwave draws over 1,000W, twice the Air’s 500W rating. The Plus runs a 1,100W microwave for about 47 minutes.
Which is better as a UPS?
Both switch in 10ms; StorageReview measured just over 8ms on the Plus. The Plus carries up to 1,800W through the switch, the Air 500W.
Which charges faster?
The Plus: 56 minutes from the wall at 1,500W, against about 2 hours for the Air, and twice the solar input.
How long will each run a refrigerator?
At a 60W average: about 13.6 hours on the Air and 14.5 hours on the Plus.
Can I add a battery to either?
Only to the Plus, up to about 5kWh.
Is there a third option?
Yes: the DELTA 3 has the Plus’s six outlets, 12V outputs and battery port, with 500W of solar instead of 1,000W.
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 Plus specs from EcoFlow US. Usage observations are attributed to named reviewers. Checked on October 31, 2026.
- Specs: EcoFlow US, DELTA 3 1000 Air (archived March 19, 2026), and EcoFlow US, DELTA 3 Plus, 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.
- 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.
- 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).
Both switch in 10ms. The DELTA 3 Plus runs 1,800W from six outlets and grows to 5kWh; the 1000 Air, no longer sold by EcoFlow US, stops at 500W from one.
Prices checked November 13, 2026 at 5:31 AM EST
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Originally published: November 9, 2026