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 you run stays under 500W
DELTA 3 Classic
- you’re buying new: it is the Air’s replacement at EcoFlow US
- you run a microwave, kettle or heater: 1,800W
- you need three AC outlets and a 1-hour wall refill
Prices and stock checked by our price engine on November 5, 2026 at 4:59 AM EST. Each product is rechecked several times a day; the time refreshes when you load the page.
Same 10ms UPS, almost the same battery. The difference is what you can plug in.
The EcoFlow DELTA 3 1000 Air stores 960Wh but delivers only 500W from a single AC outlet, in a 22 lb cube. The EcoFlow DELTA 3 Classic stores 1,024Wh and delivers 1,800W from three outlets, enough for a microwave or a space heater, and it is the one EcoFlow US still sells: its 1000 Air page now redirects to the Classic. If all you back up is a router, a CPAP or a laptop, the Air was enough; for anything that heats or cooks, it never was.
Below: the five differences with numbers, a 20-second calculator for your own gear, eight modeled situations, a third option, and what published tests found.
If you’re buying today, buy the Classic: EcoFlow US no longer sells the 1000 Air and sends its page to the Classic. Both switch in 10ms; the Classic runs more than three times the wattage from three outlets and refills about twice as fast from the wall.
- 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 plug in three devices
- you want a 1-hour wall refill
The five differences that decide it
Both use LFP cells, switch to battery in 10ms, take 500W of solar and work with the EcoFlow app over Wi-Fi and Bluetooth. Neither has a 12V car socket or a battery port. 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 Classic. A load above 500W does not run on the Air at all.
Appliance for appliance, the Classic lasts 7% longer than the 1000 Air.
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What the Classic costs today
The Classic is where EcoFlow US now sends 1000 Air shoppers. The DELTA 3 adds three more outlets, a 12V socket and a battery port.
The third option: the DELTA 3 at $579
EcoFlow DELTA 3: $579 today
For those who outgrow both. Same 1,024Wh and 1,800W as the Classic, but six AC outlets, a 126W car socket, two DC barrels, 500W of solar and a 10ms UPS, and it grows to 5kWh with DELTA 3, DELTA 2, DELTA 2 Max or DELTA Pro 3 extra batteries. 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 Classic runs it.
Three plugs at once
The Classic takes all three. On the Air, add a power strip and keep the total under 500W.
A desktop PC through a grid drop
Both switch in 10ms. A gaming PC that draws over 500W under load trips the Air; the Classic has room to spare.
Refill from solar, 500W of panels
Practically identical; the Air’s smaller battery fills a few minutes sooner.
A full-size fridge, nothing else
Both carry a fridge through the night. Check your fridge’s startup draw against the Air’s 1,000W surge; the Classic’s ceiling is far higher.
A 1,500W space heater on high
Beyond the Air’s 800W X-Boost. The Classic runs it, but drains in about half an hour: treat it as a bridge.
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 Classic weight, dimensions and full specifications
Weight: 22 lb for the DELTA 3 1000 Air and 26.6 lb for the DELTA 3 Classic. Dimensions: 8.7 × 8.8 × 10.4 in and 15.6 × 7.8 × 11.2 in. 1000 Air figures come from EcoFlow’s archived US page.
EcoFlow DELTA 3 1000 Air and DELTA 3 Classic 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 Classic
- DELTA 3 Classic power station1,024Wh, 26.6 lb
- AC charging cable
- Manuals and warranty card
- Solar cable sold separatelyEcoFlow Solar to XT60i cable; a reviewer flagged its absence
- No car charging cablesold separately, per the manual
1000 Air box contents from EcoFlow Canada’s page for the same 120V model; DELTA 3 Classic from its manual. Neither box includes a solar or car cable for the Air.
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 Classic: one XT60i port for solar or car
Our times divide capacity by input power, with solar at 70% of panel rating.
Every port, side by side
DELTA 3 1000 Air
DELTA 3 Classic
Practical consequence: the Air has one AC outlet and two small USB ports, enough for a router and a phone. The Classic adds two more AC outlets and a 100W USB-C port for a laptop.
09 · NoiseNoise and heat: 1000 Air vs Classic
Both are rated quiet by EcoFlow: the EcoFlow DELTA 3 1000 Air under 39dB(A) at 1 m, the EcoFlow DELTA 3 Classic 30dB or less at 600W.
EcoFlow’s figures. Only the Classic has a reviewer account, on an EU unit.Every figure we found, with its source
What reviewers heard: Quiet at light loads, clearly audible under heavy load or fast AC charging; fans heard with an 1,825W grill as battery temperature climbed from 35 to 53°C (Basic Tutorials, EU unit).
Measured by a tester Brand figure
- Lower the AC charging speed in the app overnight.
Cold, heat and storage: 1000 Air vs Classic
The EcoFlow DELTA 3 1000 Air and the EcoFlow DELTA 3 Classic share the same limits: charging from 32°F to 113°F, running from 14°F to 113°F. Neither has a water rating.
Figures from EcoFlow’s archived 1000 Air page and the DELTA 3 Classic manual.- Charge either one above freezing; in winter, bring it indoors.
- For long storage, keep it at 68°F to 86°F with some charge, and top it up every few months (EcoFlow US).
App, UPS and smart features
The EcoFlow DELTA 3 1000 Air and the EcoFlow DELTA 3 Classic switch to battery in the same 10ms. The Classic adds Storm Guard and timed charging.
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 handle unstable grid voltage? EcoFlow says the EcoFlow DELTA 3 1000 Air steadies fluctuating grid voltage and switches to its own supply when it detects instability; no such feature is listed for the EcoFlow DELTA 3 Classic beyond its UPS.
Does it prepare for storms or charge off-peak? The EcoFlow DELTA 3 Classic starts charging when extreme weather alerts hit and runs timed missions to charge off-peak; neither feature is listed for the EcoFlow DELTA 3 1000 Air.
Does it work as a UPS? Both switch to battery in 10ms. The EcoFlow DELTA 3 1000 Air carries up to 500W through the switch, the EcoFlow DELTA 3 Classic up to 1,800W.
Can you add a battery later? Neither takes an extra battery. The DELTA 3 does.
How does the app connect? Both use the EcoFlow app over Wi-Fi and Bluetooth for monitoring and output control.
Warranty and support
EcoFlow US gives the EcoFlow DELTA 3 Classic 3 years, extended to 5 when you register it in the app. The EcoFlow DELTA 3 1000 Air carried 2 years; an existing unit keeps that term.
Only the Classic has a term you can buy today.Subject to each brand’s warranty terms and eligibility.
EcoFlow publishes no cycle rating for either. For the DELTA 3 1000 Air it cites 3,219.84kWh delivered over 10 years in its own lab, roughly 3,350 full charges of 960Wh; for the DELTA 3 Classic its US page gives none.
- If you choose the DELTA 3 Classic, register it in the EcoFlow app the day it arrives: without registration, the warranty stops at 3 years.
- If you already own a 1000 Air, check the date on your original purchase: its 2 years run from there.
What reviewers report
We have not lab-tested these two units, and we found no independent test of the 1000 Air. Here is what the one published review we found reports, 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.
1000 Air: no verifiable independent test foundDELTA 3 Classic: Basic Tutorials (March 2026, EU unit)
Usable capacity
- ClassicReviewer At over 1,800W the battery ran from full to 0 percent in just over 30 minutes. Basic Tutorials, Simon Lüthje, March 2026, EU unit
Charging
- ClassicReviewer A full wall charge took just under 55 minutes on the European unit (1,400W AC input). Flag: 230V charging. Basic Tutorials, Simon Lüthje, March 2026, EU unit
Noise and heat
- ClassicReviewer Battery temperature in the app climbed from 35 to 53 degrees C during the high-load grill test, with audible fans. Basic Tutorials, Simon Lüthje, March 2026, EU unit
UPS and output
- ClassicReviewer It held about 1.83kW of output on an electric grill from full down to empty, with no drop in power. Basic Tutorials, Simon Lüthje, March 2026, EU unit
Daily use and issues
- ClassicReviewer There is no 12-volt car socket for DC devices like cool boxes. Basic Tutorials, Simon Lüthje, March 2026, EU unit
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. Plan a power strip, and keep the total under 500W.
- Neither has a 12V car socket or DC barrels: a 12V fridge runs on its AC adapter.
- Neither can be expanded. For a battery port, look at the DELTA 3.
- Register the Classic in the EcoFlow app for its 5-year warranty.
- DELTA 3 Classic, per its US documentation: AC input capped at 1400W (100-120V, 15A); 0-80% in 45 minutes, full in 60 minutes.
- DELTA 3 Classic, per its US documentation: Single XT60 solar input, 500W max; full in about 2.5 hours on solar.
- DELTA 3 Classic, per its US documentation: Smart Generator 3000 automatic start-stop works only with DELTA 3, DELTA 3 Plus and DELTA 3 Ultra Plus, not the Classic.
- DELTA 3 Classic, per its US documentation: Second USB-C port limited to 30W (first USB-C 100W, USB-A 18W).
Frequently asked questions
Is the DELTA 3 Classic the replacement for the DELTA 3 1000 Air?
Yes, in practice: EcoFlow US redirects the 1000 Air’s page to the DELTA 3 Classic. The Classic stores a little more (1,024Wh against 960Wh) and delivers 1,800W instead of 500W.
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. X-Boost raises the limit to 800W only for heating elements. The Classic runs it.
Which is better as a UPS?
Both switch in 10ms, fast enough for most desktop power supplies. The Classic carries up to 1,800W through the switch, the Air 500W.
How many outlets does the 1000 Air have?
One AC outlet, one USB-C (18W) and one USB-A (12W), counted on EcoFlow’s product photos and spec table. The Classic has three AC outlets, two USB-C and one USB-A.
Which charges faster?
The Classic: about 60 minutes from the wall at 1,400W, against about 2 hours for the Air. From solar, both take 500W.
How long will each run a refrigerator?
At a 60W average: about 13.6 hours on the Air and 14.5 hours on the Classic.
Can I add a battery to either?
No, neither has a battery port. The DELTA 3 does.
How much do they weigh?
22 lb for the 1000 Air and 26.6 lb for the Classic.
How loud are they?
EcoFlow rates the Air under 39dB(A) at 1 m, load not stated, and the Classic at 30dB or less at 600W. No reviewer has published a measurement of the Air.
Is there a third option?
Yes: the DELTA 3 adds six AC outlets, a 12V car socket and a battery port, with the same 10ms UPS.
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 Classic specs from EcoFlow US and its manual. 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 Classic, read on October 31, 2026.
- 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 Classic: Basic Tutorials, Simon Lüthje, March 2026, EU unit.
- Runtime = capacity × 0.85 ÷ watts. Solar harvest = min(panel watts, max input) × sun hours × 0.70.
Both switch in 10ms. The Classic runs 1,800W from three outlets; the 1000 Air, no longer sold by EcoFlow US, stops at 500W from one.
Prices checked November 5, 2026 at 4:59 AM EST
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Originally published: November 2, 2026