EcoFlow DELTA 2 (EFD330)

Name: EcoFlow DELTA 2 (EFD330)
Brand: EcoFlow

On one charge the EcoFlow DELTA 2 (EFD330) runs a typical refrigerator about 9.1 hours (it may not start a hard-starting one), and runs an older furnace blower about 4.6 hours (it may not start a hard-starting one).

Buy it if you already own one: keep it. One extra battery takes it to 3,072 Wh.

Skip it if you are buying new: Amazon does not sell it as itself. The EcoFlow DELTA 3 Classic has the same 1,024 Wh battery and 1,800 W output. What to buy instead.

1,024 Wh battery (855 usable)1,800 W output2,700 W peak

Its Amazon listing now opens the EcoFlow DELTA 3. We saw that on October 7, 2026, so we show no price or buy button for this model.

Buy this instead: EcoFlow DELTA 3 Classic, $499. Same 1,024 Wh battery and 1,800 W output.

EcoFlow DELTA 3 Classic: $499 at Amazon

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 1,200 W from the wall; 0-80% in about 50 min; full in about 80 min
Extra batteries: Yes, one Smart Extra Battery
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 Plus (the same battery and output); EcoFlow DELTA 2 Max (a similar name, a different model: 2,048 Wh, 2,400 W); EcoFlow DELTA 3 Classic (1024Wh) (the same battery and output); EcoFlow DELTA 3 (the same battery and output). Read the model name on the unit’s label, not the box or the listing.

What independent tests measured

Usable energy: 850–900 Wh (median 850) in 3 tests at loads of 270 W or more (StorageReview, Outdoor Life, Everyday Solar (YouTube)).
Power it uses just to stay on: 8.2–16.7 W with the AC outlets on and nothing plugged in (Jasonoid (YouTube), Reddit owner (r/Ecoflow_community)).
What we use: 855 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 will the EcoFlow DELTA 2 run a fridge, CPAP, sump pump or furnace?

Appliance	Average draw	On one charge	Starts it?
Fridge, new and efficient (ENERGY STAR)	54 W	about 13 h	may not start a hard-starting one
Fridge, typical	83 W	about 9.1 h	may not start a hard-starting one
Fridge, old or large	130 W	about 6.2 h	may not start a hard-starting one
CPAP, heated humidifier on	55 W	about 1.6 nights (13 h)	starts it
CPAP, humidifier off, from the 12 V car socket	11.2 W	about 7.0 nights	starts it
Sump pump	136 W	about 6 h (1.7–18 h)	may not start a hard-starting one
Gas furnace blower, older single-speed	182 W	about 4.6 h (1–6.6 h)	may not start a hard-starting one
Gas furnace blower, variable-speed	132 W	about 6.1 h	runs it
Well pump (240 V)	65 W	—	needs 240 V

One appliance at a time, from the 1,024 Wh battery, counting the power it uses just to stay on (855 Wh usable at a 300 W load). Fridge figures come from ENERGY STAR’s list of certified models, plus a 20 W allowance for the power station’s own draw and doors opening. CPAP with the humidifier on is the middle of the 30–100 W a CPAP with a heated humidifier draws; humidifier off is ResMed’s own 12 V figure for an AirSense 10 on ResMed’s DC cord. A night is 8 hours. Pumps and blowers switch on and off, so their average draw is far below their running watts; the hours are hours of outage, and the range runs from one that runs often to one that rarely does. A furnace blower is wired in: it needs an inlet or transfer switch fitted by an electrician. It has no 240 V output, so it cannot run a 240 V well pump (needs 240 V); a 120 V well pump is a different case, so check the pump’s label.

Every appliance we track

Hours on one full charge, one appliance at a time, at a typical draw. Each battery is one day; each block is 2 hours. Past a day the battery is full and the figure beside it says how many hours past.

The same numbers as a table

Appliance	Typical average draw	Hours on one charge
Fridge	83 W	about 9.1 h (may not start a hard-starting one)
Furnace blower, older single-speed	182 W	about 4.6 h (may not start a hard-starting one)
Furnace blower, variable-speed	132 W	about 6.1 h
CPAP	55 W	about 13 h
Sump pump	136 W	about 6 h (may not start a hard-starting one)
Wi-Fi router and modem	24 W	about 23 h
Laptop	52 W	about 13 h

Who should skip the EcoFlow DELTA 2, and what to buy instead

You want the same battery and output, new: EcoFlow DELTA 3 Classic (1024Wh). 1,024 Wh, 1,800 W output, 120 V only, 26.7 lb; runs a typical fridge about 9.5 hours. $499 at Amazon
You want the same battery and an extra battery port: EcoFlow DELTA 3. 1,024 Wh, 1,800 W output, 120 V only, 27.6 lb; runs a typical fridge about 9.5 hours. $599 at Amazon
You want twice the battery: EcoFlow DELTA 2 Max. 2,048 Wh, 2,400 W output, 120 V only, 50.7 lb; runs a typical fridge about 18 hours. $1,049 at Amazon

Prices checked November 1, 2026.

The range behind that

This is a 1,024Wh battery with 1,800W of output, which means it gives back about 855 watt-hours at a typical household load (from independent tests) and can run anything drawing up to 1,800 watts at once.

It runs indoors and makes no fumes. Of the 16 household loads we track, it can run 12 for at least part of a day.

Figures from the maker’s own pages and manual, with a link beside each one.

Judged in: Which EcoFlow power station should you buy? (every EcoFlow model compared).

Compare it with its rivals

What it can run

Load	Running / starting	Starts it?	Typical	Range
Wi-Fi router and modem	15–40 W	starts it	about 23h	16–30h
Phone charging and small USB devices	10–40 W	starts it	about 41h	23–53h
A few LED lights	15–80 W	starts it	about 30h	12–48h
Laptop and monitor	45–150 W	starts it	about 13h	5.4–27h
CPAP	30–100 W	starts it	about 13h	7.8–20h
Chest freezer	80–500 W starts at up to 2,200 W	starts it	about 13h	3.7–33h
Sump pump	700–1,500 W starts at up to 4,500 W	may not start a hard-starting one	about 6h	1.7–18h
Microwave	800–1,800 W	starts it	about 30 minutes of running time	short bursts
Coffee maker	700–1,500 W	starts it	about 36 minutes of running time	short bursts
Television	40–250 W	starts it	about 13h	3.4–33h
Garage door opener	300–800 W starts at up to 1,800 W	starts it	about 66 minutes of running time	short bursts
12 V compressor fridge (camping)	25–110 W starts at up to 320 W	starts it	about 27h	13–42h

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

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: 1,024 Wh (about 855 Wh usable, from tests)
Continuous output: 1,800 W
Peak output: 2,700 W
Output voltage: 120 V
Wall recharge: up to 1,200 W from the wall; 0-80% in about 50 min; full in about 80 min source
Solar input: up to 500 W source
Extra batteries: Yes, one Smart Extra Battery source
Warranty: 5-year warranty source
Weight: 26.5 lb (12 kg) source

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: ≈30 ms EPS/UPS switchover on grid loss (maker states this is NOT a 0ms UPS, not for servers/data equipment)websiteoss.ecoflow.com
Pass-through charging: Supports bypass/pass-through: while charging via AC with AC output also on, connected devices draw power directly from the grid rather than the batterywebsiteoss.ecoflow.com
Wall recharge: 0-80% in 50 min via X-Stream AC fast charging; 0-100% in 80 minutes (maker product page)ecoflow.com
AC input: 1,200W max AC input (X-Stream fast charging); 100-120V~ 50/60Hzwebsiteoss.ecoflow.com
USB-C: 100W max per USB-C port; 200W total across both USB-C portswebsiteoss.ecoflow.com
Outlets and ports: 6x AC outlets (1,800W total, 2,700W surge); 2x USB-A (12W each/24W total); 2x USB-A fast charge (18W each/36W total); 2x USB-C (100W each/200W total); 1x car outlet (126W max, shared with DC5521); 2x DC5521 (38W each)websiteoss.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 cells)websiteoss.ecoflow.com
Low-load shutoff: Defaults to auto-shutoff after 2 hours with no load and output buttons off (adjustable in app); AC output also auto-shuts after 12 hours with no AC loadwebsiteoss.ecoflow.com
App: EcoFlow App (iOS/Android) for remote monitoring and controlwebsiteoss.ecoflow.com
Expansion: Takes one DELTA 2 Smart Extra Battery (the manual: 'A single DELTA 2 can connect up to 1 Smart Extra Battery').websiteoss.ecoflow.com
Size: 15.7 x 8.3 x 11.1 in (400 x 211 x 281 mm)websiteoss.ecoflow.com
Weight: ≈27 lb (12 kg)websiteoss.ecoflow.com
Warranty: 5-year warrantyecoflow.com

What owners report, from public threads and long-term reviews; not our own testing.

A PCWorld reviewer measured fan noise at about 57 dBA from three feet away during max 1,200W AC charging and described the fan tone as small and shrill, calling it the unit's biggest annoyance.pcworld.com
The same reviewer noted the fans kick on at surprisingly low discharge loads (above roughly 120W), which is disruptive for use cases like powering bedroom medical equipment quietly.pcworld.com
EcoFlow pushed two firmware updates to the reviewer's unit right out of the box and told the reviewer a future update would specifically target fan noise, which the reviewer read as a sign of active ongoing support.pcworld.com
A 6-month long-term tester at Portable Power Lab reported no measurable capacity degradation after 150+ charge cycles, and said the unit still felt as structurally solid as day one.portablepowerlab.com
That same long-term tester measured fan noise scaling with load, from near-silent (~20-22 dB) under light loads under 50W up to ~48-55 dB at maximum 1,000-1,800W draw, and rated it as comparatively quiet for its class at typical (non-max) loads -- a milder noise picture than the PCWorld reviewer reported at max charging.portablepowerlab.com
Multiple review sites comparing the DELTA 2 to the newer DELTA 3 frame the upgrade as worthwhile mainly for owners who specifically need alternator charging, a higher surge ceiling, or larger battery expansion, and otherwise recommend sticking with the cheaper DELTA 2 since base AC charging speed and output are comparable between the two generations.backuppowerhub.com
Fan noise is the most consistently cited complaint for the DELTA 2, particularly during high-power AC charging (measured as loud/shrill by one reviewer at ~57 dBA), and fans can trigger at loads as low as ~120W; EcoFlow acknowledged this and said a firmware update would target it.pcworld.com
Compared with the newer DELTA 3, reviewers note this model lacks alternator charging and tops out at 3 kWh with one extra battery (the DELTA 3 reaches 5 kWh).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
Noise under load, measured	45-50 dB fan noise noticeable under heavy load	Power Station Advisor
Wall charge, to 80%	Reached 80% in roughly 48-52 minutes per the tester's own verified benchmarks (maker: EcoFlow's rated spec of 0-80% in 50 minutes)	Power Station Advisor
Weight, measured	27 lb, described by the tester from hands-on handling as substantial but one-hand-carryable (maker: 27 lb manufacturer spec)	Power Station Advisor
Also measured	Powered an 18 cu ft refrigerator for 8-10 hours in the tester's own real-world test	Power Station Advisor

After 18 months of testing, named a top recommendation and 'Best Overall Portable Power Station' / 'Our Top Pick' in its class. (Best Overall Portable Power Station) Power Station Advisor
The better choice versus the DELTA 2 Max for individuals or couples who prioritize portability and essential backup without overspending. Power Station Advisor

Recall screen

No published recall names this exact model

No CPSC recall in the 2026-10-09 recall list names this exact model (1 recall names the brand; none names this model).

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.

Use the CPSC recall search.

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.

Buying the right one

Before you shop for this model