EcoFlow DELTA 3 Classic (1024Wh)
The short answer
This is a 1,024Wh battery with 1,800W of output, which means it stores about 870 watt-hours you can actually use and can run anything drawing up to 1,800 watts at once.
It runs indoors and makes no fumes. Of the 15 household loads we track, it can handle 13. It would keep a refrigerator going for 1.2–8.7 hours.
Check you have the right model
EcoFlow sells other models that can be mistaken for this one:
- EcoFlow DELTA 3 Plus. same battery size and same output as this one.
- EcoFlow DELTA 3. same battery size and same output as this one.
- EcoFlow DELTA 2 (EFD330). same battery size and same output as this one; peak output 2,700W instead of 3,600W.
Read the full model name off the label on the unit itself, not off the box or the listing. The figures on this page apply only to the exact name in the heading above.
Power and battery figures published by the maker. We have not yet researched the rest of this model.
Judged in: Which EcoFlow DELTA 3? The whole family, judged against one plan; How much battery it takes to run a refrigerator, and which power station does it; EcoFlow DELTA 3 vs DELTA 2: what changed, and which one to buy (compared).
Specifications only
We have the maker's power and battery figures, so the planner can size it. We have not yet checked the manual, the solar and wall-charging limits, extra batteries, the warranty, the official add-ons, or safety recalls.
Treat this as a model to research, not one we vouch for. The fully researched models have all of that.
What it can run
| Load | Draw | Runtime | Verdict |
|---|---|---|---|
| Wi-Fi router and modem | 15–40W | 21.8–58.0h | Might work |
| Phone charging and small USB devices | 10–40W | 21.8–87.0h | Will work |
| A few LED lights | 15–80W | 10.9–58.0h | Will work |
| Laptop and monitor | 45–150W | 5.8–19.3h | Might work |
| CPAP | 30–100W | 8.7–29.0h | Will work |
| Refrigerator/freezer | 100–700W | 1.2–8.7h | Might work |
| Chest freezer | 80–500W | 1.7–10.9h | Might work |
| Sump pump | 700–1,500W | 0.6–1.2h | Might work |
| Microwave | 800–1,800W | 0.5–1.1h | Might work |
| Coffee maker | 700–1,500W | 0.6–1.2h | Might work |
| Television | 40–250W | 3.5–21.8h | Might work |
| Garage door opener | 300–800W | 1.1–2.9h | Will work |
| 12 V compressor fridge (camping) | 25–110W | 7.9–34.8h | Might work |
The two numbers are how long it lasts if your appliances are efficient, and if they are not. Sized over a 24-hour outage.
Living with it
What the maker’s own pages and manual say about owning this unit, and what owners report in public. Each line links to where it was read. Nothing here is our own test.
- Switchover when the grid drops
- 10 ms (maker-stated standby-UPS transfer time)us.ecoflow.com
- Pass-through charging
- Supported as automatic 'Bypass Mode': charging and discharging via AC input/output simultaneously auto-enables bypass; a separate app toggle can force appliances to draw only from the battery (not raw grid) when bypass is active.images.thdstatic.com
- Wall recharge
- 0-80% in 45 minutes via AC charging (maker claim); AC input capped at 1400W maxus.ecoflow.com
- AC input
- 1400 W max AC input (100-120V~15A, 50/60Hz per spec table)images.thdstatic.com
- USB-C
- 100 W max on USB-C1 (5/9/12/15V=3A, 20V=5A, PD3.0/QC3.0/UFCS); USB-C2 caps at 30 W max (5/9V=3A, 15V=2A, PD3.0/QC3.0)us.ecoflow.com
- Outlets and ports
- USB-C x2 (USB-C1: 100W max, PD3.0/QC3.0/UFCS; USB-C2: 30W max, PD3.0/QC3.0), USB-A x1 (18W max, QC3.0 fast charge), AC output ports (plural; count not stated in extractable manual/product text, but front-panel diagrams show 3 sockets and multiple hands-on reviews independently report 3 AC outlets with 1 ungrounded), 1x XT60i input (shared solar 500W max / car 96W max), 1x AC input (IEC).images.thdstatic.com
- Noise
- <30 dB at 600 W load; <40 dB at 1200 W load (maker spec)ecoflow.com
- Charges between
- 0°C to 45°C (32°F to 113°F)images.thdstatic.com
- Runs between
- -10°C to 45°C (14°F to 113°F)images.thdstatic.com
- Cycle life
- No explicit cycle count published by EcoFlow for this model on the product page, support FAQ, or manual. The only maker-stated longevity figure is an estimated ~10-year lifespan from internal simulation testing (not a cycles-to-80% number). Third-party review sites cite '3,000+' to '4,000' cycles to 80% capacity, but that figure could not be verified on any EcoFlow-owned page for this specific SKU, so it is excluded here per sourcing rules.us.ecoflow.com
- Low-load shutoff
- Yes — the AC output auto-shuts-off after an idle timeout to save power; the timeout can be set to 'never' in the app for continuous loads like a fridge, and the manual warns this feature can false-trigger on intermittent loads (fridges/ACs cycling on and off).images.thdstatic.com
- App
- EcoFlow app, marketed on the product page as 'OASIS 3.0 Smart App Control'; the manual refers to it generically as 'the EcoFlow app'. Connects via Wi-Fi and Bluetooth.us.ecoflow.com
- Size
- 15.6 x 7.8 x 11.2 in (398 x 200 x 283 mm)images.thdstatic.com
- Weight
- 26.6 lb (12.1 kg)images.thdstatic.com
- Warranty
- 3-year standard warranty, extendable to 5 years total (additional 2 years) by registering the device in the EcoFlow app.ecoflow.com
What owners report, from public threads and long-term reviews; not our own testing.
- One hands-on reviewer measured idle/standby power draw at roughly 17W and clocked inverter efficiency around 83%, both called strong for a budget-tier unit, plus near-silent operation at idle.thesolarlab.com
- Several reviewers independently flag the complete lack of a battery-expansion port as the unit's most common complaint, since sibling DELTA 3 models support add-on batteries and this one doesn't.prismopicks.com
- A reviewer noted the OASIS 3.0 app delivers solid monitoring but can feel complex for first-time users navigating its settings.prismopicks.com
- One reviewer ran a 60W mini-fridge on a full charge for about 14 hours, but found a small 5,000 BTU window AC unit drained the battery in under two hours, illustrating the real-world runtime gap between light and heavy loads.backuppowerhub.com
- Reviewers across multiple sites consistently point out the unit ships with only three AC outlets (one reportedly ungrounded), no 12V car-style DC outlet, and a 500W solar input ceiling that simply ignores extra wattage from larger panel arrays.thesolarlab.com
- A reviewer found EcoFlow's 'Smart Generator' compatibility claim for this model is misleading — in practice it just means the unit can be AC-charged from a generator, not that it has generator-specific automation.thesolarlab.com
- Reviewers note the unit has no built-in LED work light, unlike some competitors at a similar price point, which limits its usefulness for nighttime emergencies.thesolarlab.com
- The 500W solar input ceiling means pairing it with larger 600W+ panel arrays wastes the excess wattage since the unit will not accept more than its cap.backuppowerhub.com
What independent testers measured
We do not test units ourselves. These are figures published by testers who did, with the maker’s claim beside them where the tester gave it.
| Measurement | Result | Tester |
|---|---|---|
| Inverter efficiency, measured | ~83% inverter efficiency measured by the tester | The Solar Lab |
| Idle draw, measured | roughly 17W idle draw, as measured by the tester | The Solar Lab |
| Wall charge, empty to full | just shy of 55 minutes, empty to full, on a standard wall outlet | The Solar Lab |
| Also measured | About 2 hours to charge fully via solar panels in the tester's setup | The Solar Lab |
- A no-nonsense, budget-friendly portable power station well suited to camping or light emergency backup, though buyers wanting more ports/expandability should look elsewhere. The Solar Lab
- Rated 8.2/10 and called the best budget entry point into EcoFlow's DELTA 3 lineup, though this review is spec-based (real-world use photos, no lab measurements) rather than hands-on tested. Backup Power Hub
Specifications
- Capacity
- 1,024Wh nameplate · 870Wh assumed usable
- Continuous output
- 1,800W
- Surge output
- 3,600W
- Output voltage
- 120V
- Weight
- 12.1kg
- Solar input
- not captured
- AC recharge
- not captured
- Expansion battery
- not captured
- Warranty
- not captured
- Generator recharge
- not captured
Recall screen
Not screened
No recall screen recorded for this product.
No manufacturer recall-lookup URL is captured for this brand. Use the CPSC recall search.
Buying the right one
Verified listing — the bare unit
EF ECOFLOW Portable Power Station Delta 3 Classic, 1024Wh 1800W AC
ASIN B0FQVC4RF5 · $559.00 when checked on 2026-08-13 · purchasable
Title states 1024Wh and 1800W, matching our record exactly. A price is not a product attribute: treat this as the figure at capture time, not today's price.
Some links on this page are affiliate links. If you buy through one we may earn a commission, at no extra cost to you. It does not affect which products the planner recommends: rankings come from the sizing rules on our methodology page, and a product with unresolved safety identity is never ranked or linked regardless of commission.
Listings we rejected
Searching for this model returns bundles, sibling models and refurbished units alongside the bare product. These are the ones we checked and did not link, with the reason.
| Listing | Price | Why it is not this product |
|---|---|---|
| EF ECOFLOW Portable Power Station Delta 3 Classic with Bag, 1024Wh 1800W | $509 | Listing is a bundle (solar panel or kit), not the bare base unit our specifications describe. |
| EF ECOFLOW Portable Power Station Delta 3 Classic with Solar Charge Cable | $499 | Listing is a bundle (solar panel or kit), not the bare base unit our specifications describe. |
| EF ECOFLOW Solar Generator DELTA 3 Classic with 2x100W Solar Panels, 1024Wh | $659 | Listing is a bundle (solar panel or kit), not the bare base unit our specifications describe. |
| EF ECOFLOW Delta 3 Portable Power Station, 1024Wh 1800W | $629 | Listing title does not contain the model name 'DELTA 3 Classic'. |
| EF ECOFLOW Portable Power Station DELTA 3 Plus 1024Wh, 1800W, LFP Battery | $719 | Listing title does not contain the model name 'DELTA 3 Classic'. |