EcoFlow DELTA 2 Max
On one charge the EcoFlow DELTA 2 Max runs a typical refrigerator about 18 hours, and runs an older furnace blower about 9.1 hours.
2,048 Wh battery (1,727 usable)2,400 W output4,800 W peak
$608 per usable kWh at Amazon prices checked November 1, 2026 ($1,049 for 1,727 usable Wh). Its EcoFlow DELTA 2 Max Smart Extra Battery had no bare-pack listing on Amazon when we checked. How we work it out
Price checked November 1, 2026; Amazon shows today’s price. This is the listing for this model on its own, not a bundle.
Planning figures: a typical refrigerator averages about 83 W; an older furnace blower averages about 182 W. Yours may use less or more; the range is in the table below. How long other power stations run a refrigerator. A furnace blower is wired in: it needs an inlet or transfer switch fitted by an electrician.
- Wall recharge
- up to 1,800 W from the wall; 0-80% in about 1.1 h on AC alone
- Extra batteries
- Up to 2 extra batteries, 6,144 Wh total
- Recalls
- no CPSC recall names this exact model (screened 2026-10-09)
Check you have the right model. Not the same as: EcoFlow DELTA 3 Max (2048Wh) (the same battery and output); EcoFlow DELTA 2 (EFD330) (a similar name, a different model: 1,024 Wh, 1,800 W). Read the model name on the unit’s label, not the box or the listing.
Not the recalled EcoFlow DELTA Max (2000). CPSC recalled that model (EFD310) on October 9, 2025. If the label under your unit says EFD310, stop using it and read the CPSC notice. How to tell them apart.
What independent tests measured
- Usable energy: 1,800 Wh in 1 test at loads of 350 W or more (StorageReview).
- Power it uses just to stay on: 13.6–22.5 W with the AC outlets on and nothing plugged in (The Solar Lab, HOBOTECH (YouTube)).
- What we use: 1,727 Wh usable at a typical 300 W load; every hours figure on this page counts the idle draw. The one rule we use.
How long it runs each appliance
The same numbers as a table
| Appliance | Typical average draw | Hours on one charge |
|---|---|---|
| Fridge | 83 W | about 18 h |
| Furnace blower, older single-speed | 182 W | about 9.1 h |
| Furnace blower, variable-speed | 132 W | about 12 h |
| CPAP | 55 W | about 25 h |
| Sump pump | 136 W | about 12 h |
| Wi-Fi router and modem | 24 W | about 41 h |
| Laptop | 52 W | about 26 h |
Photos from the listing for this model on its own.
The range behind that
This is a 2,048Wh battery with 2,400W of output, which means it gives back about 1,727 watt-hours at a typical household load (from independent tests) and can run anything drawing up to 2,400 watts at once.
It runs indoors and makes no fumes. Of the 16 household loads we track, it can run 14 for at least part of a day. It would keep a refrigerator going for 12–25 hours, from a hard-working fridge to an efficient one.
Figures from the maker’s own pages and manual, with a link beside each one.
DELTA 2 Max or DELTA 3 Max (2048Wh)?
Both hold 2,048 Wh. At Amazon prices checked November 1, 2026, the EcoFlow DELTA 2 Max costs $608 per usable kWh and the EcoFlow DELTA 3 Max (2048Wh) $543, so the EcoFlow DELTA 3 Max (2048Wh) is the cheaper battery. Extra batteries: DELTA 2 Max: Up to 2 extra batteries, 6,144 Wh total; DELTA 3 Max (2048Wh): Not listed by EcoFlow (only the Max Plus). If you may add a battery later, that settles it.
Judged in: Which EcoFlow power station should you buy? (every EcoFlow model compared); The best portable power stations for home backup; The best portable power stations for camping; The best portable power stations for a sump pump; Can a power station run a gas furnace? Yes, with the right hookup.
What it can run
| Load | Running / starting | Starts it? | Typical | Range |
|---|---|---|---|---|
| Wi-Fi router and modem | 15–40 W | starts it | about 41h | 31–52h |
| Phone charging and small USB devices | 10–40 W | starts it | about 68h | 42–83h |
| A few LED lights | 15–80 W | starts it | about 52h | 23–77h |
| Laptop and monitor | 45–150 W | starts it | about 26h | 11–48h |
| CPAP | 30–100 W | starts it | about 25h | 15–37h |
| Refrigerator/freezer | 100–700 W
starts at up to 2,900 W |
starts it | about 18h | 12–25h |
| Chest freezer | 80–500 W
starts at up to 2,200 W |
starts it | about 26h | 7.5–57h |
| Sump pump | 700–1,500 W
starts at up to 4,500 W |
starts it | about 12h | 3.4–33h |
| Window air conditioner | 500–3,250 W
starts at up to 7,200 W |
may not start a hard-starting one | about 2.5h | 0.7–8.4h |
| Microwave | 800–1,800 W | starts it | about 61 minutes of running time | short bursts |
| Coffee maker | 700–1,500 W | starts it | about 73 minutes of running time | short bursts |
| Television | 40–250 W | starts it | about 25h | 6.8–57h |
| Garage door opener | 300–800 W
starts at up to 1,800 W |
starts it | about 2 hours of running time | short bursts |
| 12 V compressor fridge (camping) | 25–110 W
starts at up to 320 W |
starts it | about 48h | 24–70h |
Hours of use on one charge. Typical is the middle of our range for that appliance; the range runs from a hard-working unit to an efficient one. Short-burst loads (microwave, coffee maker, garage door) show running time at full power instead. “Starts it” means the peak output covers even a hard-starting one.
What a kilowatt-hour costs
| What | Amazon price | Usable energy | Per usable kWh |
|---|---|---|---|
| The station | $1,049 | 1,727 Wh | $608 |
Per usable kWh = Amazon price divided by usable energy: what the unit gives back at a typical 300 W household load, counting the power it uses just to stay on. The same rule runs everywhere on this site (how). Station price checked November 1, 2026; we show prices only on the day they were checked and keep no price history. The maker’s pack, the EcoFlow DELTA 2 Max Smart Extra Battery, had no bare-pack listing on Amazon when we checked; only bundles with a station.
Specifications
- Battery
- 2,048 Wh (about 1,727 Wh usable, from tests)
- Continuous output
- 2,400 W
- Peak output
- 4,800 W
- Output voltage
- 120 V
- Wall recharge
- up to 1,800 W from the wall; 0-80% in about 1.1 h on AC alone source
- Solar input
- up to 1,000 W
two inputs; 500W single port, 1000W total. source - Extra batteries
- Up to 2 extra batteries, 6,144 Wh total source
- Warranty
- 5 years source
- Weight
- 50.7 lb (23 kg) source
Maker page: EcoFlow product page, read 2026-08-12
Manual: EcoFlow manual
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
- App
- EcoFlow App (iOS/Android) via Bluetooth and Wi-Fi for remote monitoring, control, and settings (e.g. charge speed, standby timer, X-Boost)websiteoss.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
Recall screen
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.
How to tell them apart: Turn the unit over. The recalled product has 'EFD310' and 'EcoFlow DELTA Max (2000)' on the underside listed. If your listed 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.
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 label 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 unit on its own
ASIN B0C4DW17PD · $1,049.00 when checked on November 1, 2026 · purchasable
Title states 2048Wh and 2400W, matching the maker's figures exactly. Prices change: Amazon shows today’s price.
Listings we turned down
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 3 Max Portable Power Station, 2048Wh LFP Battery, 2400W | 3400W | $899 | Listing title does not contain the model name 'DELTA 2 Max'. |
| EF ECOFLOW DELTA 2 Max Solar Generator 2048Wh with 220W Solar Panel | LiFePO4 Ba | $1,349 | Listing is a bundle (solar panel or kit), not the bare base unit our specifications describe. |
| EF ECOFLOW DELTA 2 Max Solar Generator 2048Wh With 400W Solar Panel | LFP Batter | $1,549 | 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 | LiFePO4 Battery, Full | $599 | Listing is a different model, not this one. |
| EF ECOFLOW DELTA 3 MAX Portable Power Station with 220W Solar Panel, 2048Wh | 34 | $1,199 | Listing is a bundle (solar panel or kit), not the bare base unit our specifications describe. |
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
Maker’s wording: 'up to two' extra batteries referenced - 220W NextGen Bifacial Solar Panels
Maker’s wording: named solar option - 400W Portable Solar Panel
Maker’s wording: named solar option - 500W Solar Kit
Maker’s wording: named solar option - 800W Alternator Charger
Maker’s wording: named accessory