HomeAll modelsEcoFlow DELTA 3 Classic
EcoFlow DELTA 3 Classic
The DELTA 3 Classic is a 1,024 Wh, 1,800 W EcoFlow station with three AC outlets, no 12 V car socket and no expansion battery. It suits you if you mainly run AC appliances and recharge from the wall, where it goes from empty to full in 60 minutes.
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EcoFlow, 700 to 1,499 Wh
1,024Wh
A CPAP for several nights, a 12 V cooler for a weekend, a refrigerator for most of a day.
Strengths
- 1,800 W continuous and 3,600 W surge: runs a 1,500 W kettle about 33 minutes, or a family-size microwave that draws 1,600 W about 31 minutes.
- 1,024 Wh runs a 21 cu ft top-freezer refrigerator about 14 hours, or starts a 1/2 HP sump pump (2,645 W start-up) and runs it about 54 minutes.
- 0-80% in 45 minutes and full in 60 minutes from the wall, at up to 1,400 W.
- 26.6 lb, against 27.6 lb for the DELTA 3 and DELTA 3 Plus.
- 10 ms UPS switchover and 500 W solar input.
Limits
- No 12 V car socket, so a 12 V cooler or DC cable cannot plug in directly.
- Not expandable; the DELTA 3 and DELTA 3 Plus take extra batteries up to 5,000 Wh.
- Three AC outlets and one USB-A port, against six AC outlets and two USB-A ports on the DELTA 3.
- The 5-year warranty needs registration (3 years standard plus 2 extended), and EcoFlow gives no cycle-life figure; it rates the DELTA 3 at 4,000 cycles to 80+% capacity.
Prices today
| Where | Price | Per Wh | Stock | Checked | |
|---|---|---|---|---|---|
| us.ecoflow.com | $499store's "compare at" price $599 | $0.49 | In stock | Oct 28, 2026, 22:59 UTC | Store |
| Amazon | $499 | $0.49 | In stock | Oct 28, 2026, 22:58 UTC | Amazon |
Product prices and availability are accurate as of the date/time indicated and are subject to change.
Price history
Price tracking for this model started Oct 28, 2026. The store and Amazon prices are recorded twice a day; the chart appears once there are a few days of readings.
What the DELTA 3 Classic runs
Runtimes for one appliance at a time, from each appliance maker's own figure. They count 82% of the 1,024 Wh battery as usable and add 15 W for the inverter on AC loads (the method). For a mix of appliances, use the sizing tool.
| Appliance | Draw | DELTA 3 Classic |
|---|---|---|
| Refrigerator, top freezer (21 cu ft)Whirlpool WRT541SZD (21.3 cu ft top freezer; ENERGY STAR model WRT541SZD*0*, no ice maker installed) | 46 W | 14 hours |
| Chest freezer (7 cu ft)Midea MRC07M7AWW (7.0 cu ft compact chest freezer, manual defrost) | 26 W | 21 hours |
| CPAP (ResMed AirSense 11)ResMed AirSense 11 (AutoSet / Elite / CPAP) with 65 W power supply unit, HumidAir 11 humidifier | 56 W | 12 hours |
| Wi-Fi router (eero 6+)eero 6+ (Amazon eero) | 5 W | 43 hours |
| 55-inch TVLG 55UT7570PUB (UT75 series) | 127 W | 5.9 hours |
| Starlink StandardStarlink Standard kit (Starlink V4 dish + Router 3; US spec page titled 'Standard 4X') | 100 W | 7.3 hours |
| Gas furnace blower (80,000 BTU)Goodman GR9S960803BN (80,000 BTU/h input, 95% AFUE, single-stage, 1/2 HP 9-speed ECM circulator blower) | 394 W | 2.1 hours |
| 12 V cooler (Dometic CFX3 35)Dometic CFX3 35 (CFX335, item 9600024617) | 12 W | No 12 V socket |
| 1/3 HP sump pumpLiberty Pumps 257 (1/3 HP, 115 V, cast iron, vertical magnetic float switch; PSC motor) | 598 W | 1.4 hours |
| Window AC, 5,000 BTUFrigidaire FHWC054TE1 (5,000 BTU, 115 V, R-32) | 450 W | 1.8 hours |
| Phone chargesSamsung Galaxy S25, 4,000 mAh | 15 Wh | 54 full charges |
| Laptop charges (MacBook Air 13)Apple MacBook Air 13-inch (M5) | 54 Wh | 15 full charges |
| E-bike battery chargesRad Power Bikes RadRunner Plus (MY2025), Safe Shield Advanced External Battery 13 Ah | 624 Wh | 1 full charge |
As of October 28, 2026, EcoFlow's US warranty policy gives the DELTA 3 Classic 3 years of standard warranty plus 2 more with registration, 5 years in all. The DELTA 3, DELTA 3 Plus, DELTA Pro 3 and RIVER 3 Plus are listed at 5 years. Register the station after you buy it: see EcoFlow's warranty policy.
Specifications
Every figure is EcoFlow's own, from the page linked beside it.
| Capacity | 1,024 Whsource: "Rated Capacity 1024Wh 51.2V 20Ah" |
|---|---|
| AC output, continuous | 1,800 Wsource: "AC Output 120V~60Hz 1800W total" |
| AC output, peak | 3,600 Wsource: "1800W Powerful Output: 3600W surge output." |
| Boost mode | 2,600 Wsource: "X-Boost 2600W" |
| AC outlets | 3source: "6 Outlets". The brand comparison table's 'Outlets' row counts every output port: its DELTA 3 column reads 13, matching the DELTA 3 store spec 'Total Output Ports 13' (6 of them AC). Classic: 6 total - 2 USB-C ('USB-C: 1 × 100W Max, 1 × 30W Max') - 1 USB-A ('USB-A: 1 × 18W Max') - 0 12V DC ('NO 12V DC Output Port') = 3 AC outlets. |
| Fastest USB-C port | 100 Wsource: "USB-C1:5/9/12/15V=3A, 20V=5A, 100W Max" |
| USB-C ports | 2source: "USB-C: 1 × 100W Max, 1 × 30W Max" |
| USB-A ports | 1source: "USB-A: 1 × 18W Max" |
| 12 V car socket | Nosource: "NO 12V DC Output Port" |
| Battery chemistry | LiFePO4source: "Cell Chemistry LFP(LiFePO4)" |
| Weight (lb) | 26.6 lbsource: "Net. Weight Approx. 12.1 kg (26.6 lbs)" |
| Weight (kg) | 12.1 kgsource: "Net Weight 12.1kg+0.3kg" |
| Size | 15.6 x 7.8 x 11.2 insource: "Approx. 398 × 200 × 283 mm (15.6 × 7.8 × 11.2 in.)" |
| Wall recharge | 0-80% in 45 min, 100% in 60 min (X-Stream, AC)source: "charges from 0–80% in just 45 minutes and fully charges in 60 minutes" |
| Wall charging input | 1,400 Wsource: "AC Input (Charge Only) 100-120V~15A 50/60Hz 1400W Max" |
| Max solar input | 500 Wsource: "Maximum PV Input Power(W) 500W" |
| UPS switchover | 10 mssource: "UPS 10ms" |
| Expandable | Nosource: "NO Expandable Battery" |
| Warranty | 5 yearssource: "5-Year Warranty *Includes 3-year standard warranty and 2-year extended warranty" |
| App | Yessource: "OASIS 3.0 Smart App Control" |
| Noise | ≤30 dB at 600Wsource: "30dB Whisper-Quiet Operation: Ultra-low noise ≤30dB at 600W." |
Against other 700 to 1,499 wh models
| Spec | EcoFlow DELTA 3 Classic | BLUETTI Elite 100 mini | EcoFlow DELTA 3 | EcoFlow DELTA 3 Plus |
|---|---|---|---|---|
| Price today (lowest) | $499 | $429 | $629 | $719 |
| Price per Wh | $0.49/Wh | $0.43/Wh | $0.61/Wh | $0.70/Wh |
| Capacity | 1,024 Wh | 1,004.8 Wh | 1,024 Wh | 1,024 Wh |
| AC output, continuous | 1,800 W | 700 W | 1,800 W | 1,800 W |
| AC output, peak | 3,600 W | 1,050 W | 3,600 W | 3,600 W |
| AC outlets | 3 | 3 | 6 | 6 |
| Fastest USB-C port | 100 W | 140 W | 100 W | 140 W |
| 12 V car socket | No | Yes | Yes | Yes |
| Battery | LiFePO4 | LiFePO4 | LiFePO4 | LiFePO4 |
| Cycle life | Not stated | 6,000+ cycles to 80% capacity | 4000 cycles to 80+% capacity | 4000 cycles to 80+% capacity |
| Weight | 26.6 lb | 23.59 lb | 27.6 lb | 27.6 lb |
| Wall recharge | 60 min to full | 80% in 82 min | 56 min to full | 56 min to full |
| Max solar input | 500 W | 350 W | 500 W | 1,000 W |
| UPS switchover | 10 ms | 10 ms | Under 10 ms | Under 10 ms |
| Expandable to | Not expandable | Not stated | 5,000 Wh | 5,000 Wh |
| Warranty | 5 years | 3 years | 5 years | 5 years |
| App | Yes | Yes | Yes | Yes |
EcoFlow DELTA 3 Classic questions
How many nights will the EcoFlow DELTA 3 Classic run a CPAP?
A ResMed AirSense 11 at its typical 56 W runs about 12 hours on AC power: 1.5 nights of 8 hours. ResMed's typical figure includes its humidifier; a higher humidifier or heated-tube setting raises the draw. The DELTA 3 Classic has no 12 V socket, so the CPAP runs through its AC outlets.
How long does the EcoFlow DELTA 3 Classic take to charge?
EcoFlow states 60 min to full from a wall outlet, and up to 500 W of solar input.
Can you add batteries to the EcoFlow DELTA 3 Classic?
No. EcoFlow says it does not take extra batteries, so 1,024 Wh is the most it holds.
What battery does the EcoFlow DELTA 3 Classic use?
LiFePO4.
Compare and use
Sources
Specifications are the makers' own published figures, read from these pages. Prices are fetched from the stores at build time and dated where they appear.
- EcoFlow DELTA 3 Classic: capacity: https://us.ecoflow.com/products/delta-3-classic-portable-power-station
- EcoFlow DELTA 3 Classic: ac outlets: https://www.ecoflow.com/us/delta-3-classic-portable-power-station
- EcoFlow DELTA 3 Classic: weight (lb): https://manuals.ecoflow.com/us/product/delta-3-classic
- Refrigerator, top freezer (21 cu ft) (Whirlpool WRT541SZD (21.3 cu ft top freezer; ENERGY STAR model WRT541SZD*0*, no ice maker installed)): https://www.energystar.gov/productfinder/product/certified-residential-refrigerators/details/2218136/export/pdf
- Chest freezer, small (7 cu ft) (Midea MRC07M7AWW (7.0 cu ft compact chest freezer, manual defrost)): https://www.energystar.gov/productfinder/product/certified-residential-freezers/details/2395046/export/pdf
- CPAP machine (ResMed AirSense 11) (ResMed AirSense 11 (AutoSet / Elite / CPAP) with 65 W power supply unit, HumidAir 11 humidifier): https://document.resmed.com/documents/products/machine/airsense-11/user-guide/airsense11_user-guide_amer_mul.pdf
- Wi-Fi router (mesh, eero 6+) (eero 6+ (Amazon eero)): https://eero.com/support/articles/how-much-power-does-eero-use
- 55-inch 4K TV (LG 55UT7570PUB (UT75 series)): https://lg.com/us/lgecs.downloadFile.ldwf?DOC_ID=20240503219193&ORIGINAL_NAME_b1_a1=MEZ68996312(REV01)_55UT7570PUB_NEW%20FTC.pdf&FILE_NAME=MEZ68996312(REV01)_55UT7570PUB_NEW%20FTC[20240503102140932].pdf&TC=DwnCmd&GSRI_DOC=GSRI
- Starlink Standard kit (V4) (Starlink Standard kit (Starlink V4 dish + Router 3; US spec page titled 'Standard 4X')): https://starlink.com/public-files/specification_sheet_standard.pdf
- Gas furnace blower, 80,000 BTU (heating mode) (Goodman GR9S960803BN (80,000 BTU/h input, 95% AFUE, single-stage, 1/2 HP 9-speed ECM circulator blower)): https://www.goodmanmfg.com/docs/librariesprovider6/default-document-library/ss-gr9s96_gd9s96-r32.pdf
- 12V portable fridge, ~36 L (Dometic CFX3 35) (Dometic CFX3 35 (CFX335, item 9600024617)): https://www.dometic.com/en-us/product/dometic-cfx3-35-9600024617
- Sump pump, 1/3 HP (Liberty Pumps 257 (1/3 HP, 115 V, cast iron, vertical magnetic float switch; PSC motor)): https://www.libertypumps.com/wholesale/wp-content/uploads/sites/3/250-Series_EN.pdf
- Window air conditioner, 5,000 BTU (Frigidaire FHWC054TE1 (5,000 BTU, 115 V, R-32)): https://www.frigidaire.com/en/p/home-comfort/air-conditioners/window-mounted-air-conditioners/FHWC054TE1
- Smartphone (Samsung Galaxy S25) (Samsung Galaxy S25, 4,000 mAh): https://www.samsung.com/us/smartphones/galaxy-s25/
- Laptop (MacBook Air 13-inch) (Apple MacBook Air 13-inch (M5)): https://www.apple.com/macbook-air/specs/
- E-bike battery (Rad Power Bikes RadRunner Plus) (Rad Power Bikes RadRunner Plus (MY2025), Safe Shield Advanced External Battery 13 Ah): https://www.radpowerbikes.com/products/radrunner-plus-electric-cargo-utility-bike