EcoFlow DELTA 2 Max
Do not confuse this with a recalled product
EcoFlow DELTA Max (2000) (model EFD310) was recalled on 2025-10-09 — The power stations may overheat and ignite, posing a risk of serious burn injury and fire.
'DELTA Max 2000' and 'DELTA 2 Max' are separate products whose names differ only by word order. An owner searching for one can easily read guidance written for the other. This page must display the distinction and the recall route before any other content.
How to tell them apart: Turn the unit over. The recalled product has 'EFD310' and 'EcoFlow DELTA Max (2000)' on the underside nameplate. If your nameplate reads that, you have the recalled model, not the DELTA 2 Max described on this page.
If you have the recalled unit: Stop using the recalled power station immediately and contact EcoFlow for a free firmware-update repair. Read the CPSC notice.
The short answer
This is a 2,048Wh battery with 2,400W of output, which means it stores about 1,741 watt-hours you can actually use and can run anything drawing up to 2,400 watts at once.
It runs indoors and makes no fumes. Of the 15 household loads we track, it can handle 14. It would keep a refrigerator going for 2.5–17.4 hours.
Check you have the right model
EcoFlow sells other models that can be mistaken for this one:
- EcoFlow DELTA 3 Max (2048Wh). same battery size and same output as this one.
- EcoFlow DELTA 2 (EFD330) — they differ by a single word: MAX against EFD330. peak output 2,700W instead of 4,800W.
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.
Specs from the maker, checked against 9,944 US safety recalls. Anything we could not confirm is marked.
Judged in: The best portable power stations for home backup; The best portable power stations for camping; How much battery it takes to run a refrigerator, and which power station does it; The best portable power stations for a sump pump; The best portable power stations for a gas furnace.
What it can run
| Load | Draw | Runtime | Verdict |
|---|---|---|---|
| Wi-Fi router and modem | 15–40W | 43.5–116.1h | Will work |
| Phone charging and small USB devices | 10–40W | 43.5–174.1h | Will work |
| A few LED lights | 15–80W | 21.8–116.1h | Will work |
| Laptop and monitor | 45–150W | 11.6–38.7h | Will work |
| CPAP | 30–100W | 17.4–58.0h | Will work |
| Refrigerator/freezer | 100–700W | 2.5–17.4h | Might work |
| Chest freezer | 80–500W | 3.5–21.8h | Might work |
| Sump pump | 700–1,500W | 1.2–2.5h | Might work |
| Window air conditioner | 500–3,250W | 0.5–3.5h | Might work |
| Microwave | 800–1,800W | 1.0–2.2h | Might work |
| Coffee maker | 700–1,500W | 1.2–2.5h | Might work |
| Television | 40–250W | 7.0–43.5h | Will work |
| Garage door opener | 300–800W | 2.2–5.8h | Will work |
| 12 V compressor fridge (camping) | 25–110W | 15.8–69.6h | Will 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
- Maker claims ~20 ms (marketing page, current); the printed user manual states the older EPS spec of within 30 msecoflow.com
- Pass-through charging
- Yes, via AC bypass/EPS mode: connected devices are powered by the grid while the unit recharges, but bypass current above 12A total is limited to under 3 hours; manual explicitly warns it is not a 0ms UPS and is unsuitable for servers/workstationswebsiteoss.ecoflow.com
- Wall recharge
- Maker claims 0–80% in ~1.1 hr on AC alone (1,800W input), or 0–80% in 43 min with AC+solar combined; the printed manual separately labels the AC-cable charging diagram "About 80 minutes" without specifying the end percentageecoflow.com
- AC input
- 1,800 W max via X-Stream fast charging, 100-120V~, 15A maxwebsiteoss.ecoflow.com
- USB-C
- 100 W max per USB-C port (200 W total across both), USB PD 5/9/12/15/20V at up to 5Awebsiteoss.ecoflow.com
- Outlets and ports
- 6x AC outlets (120V~, 2,400W total, 4,800W surge, pure sine wave; 3,400W with X-Boost); 2x USB-A 5V/2.4A max 12W/port; 2x USB-A Fast Charging max 18W/port; 2x USB-C PD 5/9/12/15/20V@5A max 100W/port; 1x car outlet 12.6V/10A max 126W (shares power with DC5521 port); 2x DC5521 output 12.6V/3A max 38W/port; plus solar/car charging input port and X-Stream AC charging input portwebsiteoss.ecoflow.com
- Noise
- ~30 dB (maker claim; test distance/load conditions not stated in this quote)ecoflow.com
- Charges between
- 0°C to 45°C (32°F to 113°F)websiteoss.ecoflow.com
- Runs between
- -10°C to 45°C (14°F to 113°F)websiteoss.ecoflow.com
- Cycle life
- 3,000 cycles to 80%+ remaining capacity (LFP chemistry)websiteoss.ecoflow.com
- Low-load shutoff
- LCD sleeps after 5 min of no interaction; whole unit auto-shuts-off after 2 hrs at no load with output buttons off (default, adjustable in app); AC output button specifically auto-shuts-off after 12 hrs with no AC loadwebsiteoss.ecoflow.com
- Expansion
- 2x Smart Extra Battery ports; supports up to 2 EcoFlow DELTA 2 Max Smart Extra Batteries for up to 6,144Wh total capacity; also supports an EcoFlow Smart Generator (sold separately)websiteoss.ecoflow.com
- Size
- 19.6 x 9.5 x 12 in (497 x 242 x 305 mm)websiteoss.ecoflow.com
- Weight
- ~50 lbs (23 kg)websiteoss.ecoflow.com
- Warranty
- 5-year warrantyecoflow.com
What owners report, from public threads and long-term reviews; not our own testing.
- An overlander who ran the unit daily for a full year to power a diesel heater, coffee maker, and Starlink calls it a reliable, consistent part of his kit that held up to off-road jostling.4wdtalk.com
- The same one-year owner also reported the USB output ports occasionally stopped working, but the issue was resolved with a factory reset each time.4wdtalk.com
- Independent bench testing found the AC inverter runs noticeably less efficiently at everyday household loads (150-350W) than at its rated sweet spot, estimating real-world efficiency around 77% at 200W once idle overhead is factored in.windinmyface.com
- That same tester measured roughly 23W of draw just from leaving AC output switched on (versus about 5W with AC output off) and recommended owners switch off AC output when it's not actively needed to avoid unnecessary overnight battery drain.windinmyface.com
- A reviewer using the unit for nearly two years reports the companion app is one of the better power-station apps for remote Bluetooth/Wi-Fi monitoring, and that the unit still delivers its full rated 2,400W output without dropouts.thesolarlab.com
- At least one long-term owner reported the USB output ports randomly shutting off during use, requiring a factory reset to restore normal operation.4wdtalk.com
- The same owner said the 12V car outlet port never worked on his unit from new, which he suspected was an isolated manufacturing defect rather than a design-wide flaw.4wdtalk.com
- Independent efficiency testing found a meaningful fixed power overhead (roughly 23W) whenever AC output is left enabled, plus lower-than-expected conversion efficiency at light loads (~77% at 200W) — a real cost for anyone running small everyday loads rather than near the unit's rated output.windinmyface.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 |
|---|---|---|
| Noise under load, measured | 52 dB measured fan noise during heavy loads/charging | Power Station Advisor |
| Wall charge, to 80% | 0-80% AC charge in 65 minutes, per the site's own spec/test line comparing it to the DELTA 2 (maker: EcoFlow rates 0% to 80% in 50 minutes (per a separate PowerStationAdvisor article on the same site)) | Power Station Advisor |
| Also measured | Real-world 14-hour power outage: ran fridge continuously, LED lights, charged devices, ran a space heater on low, finished with 23% capacity remaining, no add-on batteries | Power Station Advisor |
| Also measured | Refrigerator (full-size) runtime in personal testing: approximately 16-20 hours on a single charge (maker: EcoFlow-derived calculation elsewhere on the site put it at ~14.2 hours for a fridge cycling 100-400W) | Power Station Advisor |
- After eight months of testing, the DELTA 2 Max is their top pick for whole-home backup, striking the best balance of capability, longevity and value in its class. (Our Top Pick for Whole-Home Backup) Power Station Advisor
- Positioned as the better choice than the standard DELTA 2 for families needing whole-home backup, extended outages, and future battery expansion. Power Station Advisor
Specifications
- Capacity
- 2,048Wh nameplate · 1,741Wh assumed usable
- Continuous output
- 2,400W
- Surge output
- 4,800W
- Output voltage
- 120V
- Weight
- 23kg
- Solar input
- 1,000W
two inputs; 500W single port, 1000W total. - AC recharge
- 1,800W
- Expansion battery
- DELTA 2 Max Smart Extra Battery; up to two stated in EcoFlow manual/support material
Use the exact current extra-battery manual and cable guidance. - Warranty
- 5 years
- Generator recharge
- EcoFlow Smart Generator supported; other generator charging must follow current manual.
Source: EcoFlow product page — captured 2026-08-12
Manual: EcoFlow manual
Recall screen
No recall names this model — but a similarly named product was recalled
CPSC recall 26010 (2025-10-09) recalls the EcoFlow 'DELTA Max (2000)', model EFD310, for an overheating/fire hazard. That is a DIFFERENT product from the DELTA 2 Max in this corpus. The recalled unit is identified by 'EFD310' and 'EcoFlow DELTA Max (2000)' printed on the nameplate on the underside.
This check cannot clear your own unit. Most recalls cover only certain serial numbers. Read the model and serial number off the label on the unit itself, then check the maker's recall page before you use it, sell it, or buy it.
How we know the screen was not simply blind
Finding nothing only means something if the search could have found something. So we searched the same records for this brand and got 1 recall. That proves the screen can see this brand, so finding nothing for this model is a real result.
[26010 2025-10-09] EcoFlow Technology Recalls Delta Max 2000 Power Stations Due to Risk of Serious Burn Injury and Fire Hazard
Buying the right one
Verified listing — the bare unit
EF ECOFLOW Portable Power Station DELTA 2 Max 2048Wh, 2400W LiFePO4 Battery
ASIN B0C4DW17PD · $1,049.00 when checked on 2026-08-13 · purchasable
Title states 2048Wh and 2400W, 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 DELTA 2 Max Power Station Extra Battery, 2048Wh LiFePO4 Battery | $879 | A stronger exact match was already accepted for this model. |
| EF ECOFLOW DELTA 3 Max Portable Power Station, 2048Wh LFP Battery, 2400W | $1,199 | Listing title does not contain the model name 'DELTA 2 Max'. |
| EF EcoFlow Delta 2 Max Portable Power Station with 800W Alternator Charger | $1,249 | 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 2 Max'. |
| EF ECOFLOW DELTA 2 Max Portable Power Station, 2048Wh, 2400W | $1,399 | A stronger exact match was already accepted for this model. |
Official accessories
These are the maker's own words. "Sold on the same page" is not the same claim as "works with this model".
- DELTA 2 Max Smart Extra Battery
Manufacturer wording: 'up to two' extra batteries referenced - 220W NextGen Bifacial Solar Panels
Manufacturer wording: named solar option - 400W Portable Solar Panel
Manufacturer wording: named solar option - 500W Solar Kit
Manufacturer wording: named solar option - 800W Alternator Charger
Manufacturer wording: named accessory
Evidence coverage
What we know about this model, and what we do not. Anything marked as needing confirmation is a job still on our list, not something we are claiming.
- manual revision
- captured
- quick start
- captured
- solar connector
- captured
- solar voltage current watt limits
- captured
- ac charge input
- captured
- generator charge policy
- captured
- expansion battery family and limit
- captured
- app firmware path
- captured
- warranty
- captured
- support
- captured
- recall adjudication
- captured
- official accessory edges
- captured