Portable power station · EcoFlow
EcoFlow DELTA 3 Classic: No Expansion, No Car Port
EcoFlow DELTA 3 Classic: 1,024 Wh LiFePO4, 1,800 W continuous, 3,600 W surge; not expandable, no 12 V car outlet, no published cycle life.
Which version: Not the DELTA 3 or DELTA 3 Plus (same 1024 Wh, but expandable and with a car outlet) or the DELTA 3 Max (2048 Wh); the Classic has no extra-battery port.
Maker list price $599 (2026-10-31, source; list (regular) price on us.ecoflow.com; sale price $499 shown at the same time)
0.58 $/Wh
See EcoFlow DELTA 3 Classic on Amazon
Amazon's price is not shown here: we only display prices we can link to a source page.
The DELTA 3 Classic is the simplest of EcoFlow's three 1,024 Wh models. Next to the DELTA 3 and DELTA 3 Plus it gives up two things that matter for backup planning: EcoFlow's specs say "Expandable Battery NO" and "12V DC Output Port/Anderson Port: NO". Its AC input is 1,400 W, against 1,500 W on the other two. It is not the DELTA 3 Max, which has 2,048 Wh.
The numbers that decide backup use
Six outlets share 1,800 W continuous, with 3,600 W surge — the same output as the DELTA 3. It can start the top-freezer refrigerator (1,200 W), the chest freezer (1,000 W) and the 1/2 HP sump pump (2,150 W). X-Boost is a boost mode for resistive loads, not a continuous rating.
Using the 0.85 factor explained on the methodology page, 1,024 Wh × 0.85 ÷ 47 W gives about 18.5 hours for the top-freezer refrigerator at its yearly-average draw, or 30.0 hours for the chest freezer at 29 W.
What EcoFlow does not publish
Neither EcoFlow page prints a cycle-life figure for the Classic, so this card shows it as not published rather than borrowing the DELTA 3's 4,000 cycles to 80 %. When cycle figures do appear, compare their end-of-life thresholds (how makers define cycle life). Weight is printed only in kilograms; the 26.7 lb shown is a conversion. Dimensions are given only in millimetres.
EcoFlow gives a discharge range of 14–113 °F, charging at 32–113 °F, and calls 68–86 °F optimal. The 5-year warranty is 3 years standard plus 2 years extended when you register the unit in the EcoFlow app. Wall charging reaches 80 % in 45 minutes.
Add your appliances to the calculator to check your own load against the DELTA 3 Classic.
Specifications
Each figure links to the manufacturer or retailer page it was read from. “Not published” means the maker's page does not state it.
| Battery capacity | 1,024 Wh source ('1024Wh 51.2V 20Ah') |
|---|---|
| Cell chemistry | LiFePO4 source ('LFP(LiFePO4)') |
| Cycle life | not published |
| AC output, continuous | 1,800 W source ('120V~60Hz 1800W total') |
| AC output, peak | 3,600 W source ('1800W Powerful Output: 3600W surge output') |
| AC outlets | 6 source ('Outlets 6') |
| USB-C, max per port | 100 W source ('USB-C1 ... 100W Max', 'USB-C2 ... 30W Max') |
| USB-C ports | 2 source |
| USB-A ports | 1 source ('USB-A: 1 × 18W Max') |
| 12 V car port | No source ('12V DC Output Port/Anderson Port: NO') |
| Solar input, max | 500 W source ('Maximum PV Input Power(W) 500W') |
| AC input, max | 1,400 W source ('100-120V~15A 50/60Hz 1400W Max') |
| Wall charge time | 0.75 h to 80 % source ('Charges from 0–80% in just 45 minutes with AC charging' (minutes converted to hours)) |
| UPS switch-over | 10 ms source ('UPS 10ms') |
| Maker's runtime factor | not published |
| Weight | 26.7 lb source (page gives weight in kg only: '12.1kg+0.3kg'; lb converted (1 kg = 2.20462 lb)) |
| Dimensions | not published |
| Operating temperature | 14 to 113 °F source (discharge; charge 32–113 °F; optimal 68–86 °F) |
| Noise | 30 dB source ('Ultra-low noise ≤30dB at 600W') |
| App control | Yes source ('Communication Method Wi-Fi & Bluetooth'; OASIS 3.0 app) |
| Expandable with extra batteries | No source ('Expandable Battery NO') |
| Warranty | 5 years source (Includes 3-year standard warranty and 2-year extended warranty available upon EcoFlow App registration) |
| Released | not published |
Frequently asked questions
Can the DELTA 3 Classic take an extra battery?
No. EcoFlow's specs say "Expandable Battery NO". The DELTA 3 and DELTA 3 Plus are expandable to 5 kWh.
Does it have a 12 V car outlet?
No. EcoFlow lists "12V DC Output Port/Anderson Port: NO".
How many cycles is the battery rated for?
EcoFlow does not print a cycle-life figure for the DELTA 3 Classic on either of its pages.
How do I get the 5-year warranty?
EcoFlow's 5 years are 3 years standard plus a 2-year extension that applies after you register the unit in the EcoFlow app.
Can it run a refrigerator overnight?
On the published numbers, yes: the top-freezer refrigerator starts within 3,600 W surge and lasts about 18.5 hours at its 47 W yearly average, using the 0.85 factor from our methodology.
Sources
- EcoFlow US store — DELTA 3 Classic product page, feature bullets and Specs section (accessed 2026-10-31)
- EcoFlow US — DELTA 3 Classic (1024Wh) Specs page (accessed 2026-10-31)
Data entered 2026-10-31. Page updated 2026-10-31.