EcoFlow Delta 2 vs Delta 3: EcoFlow has already closed this one
If you came to ecoflow delta 2 vs delta 3 expecting a two-column shootout, only one column still exists. EcoFlow’s US page for the DELTA 2 no longer resolves to a DELTA 2: us.ecoflow.com/products/delta-2-portable-power-station returns a 301 redirect straight to the DELTA 3 page, which loads normally. A second legacy DELTA 2 URL redirects to a page that then 404s. It is gone from our live EcoFlow listings too; the only DELTA 2 badged entries left are the DELTA 2 Max and a discontinued handtruck.
A permanent redirect from an old model to its successor is the clearest signal a manufacturer sends. EcoFlow is not out of stock; it has retired the listing and pointed the traffic at the replacement. So the question is whether the DELTA 3 earns your money, and what to check if a DELTA 2 turns up elsewhere.
We will not restate DELTA 2 specifications here. With the maker’s page withdrawn there is nothing left to check figures against. Capacity, output, surge and cycle-life numbers still circulate in retailer listings and cached copies, and none can be confirmed at the source. Printed beside verified DELTA 3 figures they would look like measured differences.
What EcoFlow publishes for the DELTA 3 line
Three DELTA 3 models share the same 1024 Wh LFP battery: the Classic, the plain DELTA 3, and the Plus. They differ on charging, expansion and price, not capacity. The DELTA 2 column is empty because EcoFlow publishes nothing for it any more.
| Spec | DELTA 3 Classic | DELTA 3 | DELTA 3 Plus | DELTA 2 |
|---|---|---|---|---|
| Direct price, standalone unit | $499 | $599 | $669 | Not sold |
| Capacity | 1024 Wh | 1024 Wh | 1024 Wh | — |
| AC output, rated | 1800W | 1800W | 1800W | — |
| Surge | 3600W | 3600W | 3600W | — |
| X-Boost device ceiling | 2600W | 2200W | 2200W | — |
| AC charge input | 1400W | 1500W | 1500W | — |
| Solar input | 500W | 500W | 1000W, 2 × 500W MPPT | — |
| Chemistry | LFP (LiFePO4) | LFP (LiFePO4) | LFP (LiFePO4) | — |
| Cycle life | Not published | 4000 to 80+% capacity | 4000 to 80+% capacity | — |
| Weight | 26.7 lb (12.1 kg) | 27.6 lb | 27.6 lb | — |
| Warranty | 5 years | 5 years | 5 years | — |
| Battery expansion | None published | Extra batteries, up to 5 kWh | Extra batteries, no total published | — |
| Cost per watt-hour | $0.49 | $0.58 | $0.65 | — |
Cost per watt-hour is price divided by capacity: 499 ÷ 1024 = $0.49, 599 ÷ 1024 = $0.58, 669 ÷ 1024 = $0.65. Every dollar above the Classic buys charging or expansion, never capacity. The Classic’s weight is converted: EcoFlow prints 12.1 kg with an unexplained +0.3 kg qualifier and no pound figure.
Two rows worth reading carefully
AC output first. EcoFlow rates all three at 1800W with a 3600W surge, then lists Max Device(s) Power with X-Boost as a separate row: 2200W on the DELTA 3 and Plus, 2600W on the Classic. That is a ceiling for what X-Boost drives by shaping voltage to resistive loads, not a second inverter rating — which is why some listings sell these as 2200W machines. The Classic’s higher ceiling is EcoFlow’s own figure.
Cycle life second. The DELTA 3 and DELTA 3 Plus each carry a Cycle Life row reading 4000 cycles to 80+% capacity. The Classic’s spec table has none. Its only durability claim is a footnote estimating about ten years from internal simulation data — not a cycle count, and no retention basis. We report it unpublished rather than importing 4000 from a sibling.
Runtime arithmetic on 1024 Wh
Usable energy through the inverter is capacity × 0.85, so 1024 × 0.85 = 870 Wh. Off the DC ports it is capacity × 0.92, or 942 Wh. Divide by the load for hours.
- Fridge, 50W: 870 ÷ 50 = 17.4 hours
- TV, 90W: 870 ÷ 90 = 9.7 hours
- CPAP, 40W: 21.8 hours on AC, or 942 ÷ 40 = 23.6 hours run from DC
- Router, 10W: 87 hours on AC, 94 hours on DC
- Laptop, 60W: 870 ÷ 60 = 14.5 hours
- Microwave, 1000W: 0.87 hours, about 52 minutes
- Kettle, 1500W: 0.58 hours, about 35 minutes
The 1800W rating means a 1500W kettle and a 1000W microwave both run — the dividing line between this class and the small units on our power stations hub. What 1024 Wh will not do is run them for long: treat heavy loads as minutes, and the fridge, router and CPAP as the overnight job.
Charging differences
The DELTA 3 and Plus take 1500W from the wall; the Classic takes 1400W, and EcoFlow states it hits 80% in 45 minutes and full in 60. Solar is the real split: 500W on the Classic and the DELTA 3, 1000W on the Plus across two 500W MPPT inputs — the basis of EcoFlow’s 70-minute solar charge headline. That second tracker is what the $70 between DELTA 3 and Plus buys.
If a DELTA 2 still turns up
Retired stock lingers in marketplaces and clearance channels, and can be a fair buy. The checks change once the maker closes the listing.
- Ask for the manufacture date on the unit’s label, not the listing date. LFP cells age on the shelf.
- Get in writing who honours the warranty; there is no live product page to arbitrate against.
- Confirm the chemistry on the unit itself, not the listing copy.
- Compare the asking price against $499 for a Classic. A retired unit priced above a current model with a live five-year warranty is a bad trade.
- Assume no firmware or app support timeline; retired hardware gets updates until it does not.
- Check the return window before paying.
If you want a DELTA 2 family unit specifically, the DELTA 2 Max is the only one EcoFlow still sells directly: 2048 Wh, 2400W rated, 4800W surge, 1800W AC charging, 1000W solar, 50 lb, 3000 cycles to 80+% capacity, five-year warranty, $1,049 bare. That is 1049 ÷ 2048 = $0.51 per watt-hour — twice the battery and roughly twice the price of a DELTA 3, so a different purchase, not a substitute. Ignore the stale “Pre-order” line in its description; the unit is in stock.
Which DELTA 3 to buy
The Classic at $499 is the cheapest route into 1024 Wh of LFP and has the highest X-Boost ceiling in the line; you give up the published cycle rating and any expansion path. The DELTA 3 at $599 adds 100W of AC input, a stated 4000-cycle life, and extra-battery support EcoFlow scopes at up to 5 kWh. The Plus at $669 adds the second solar tracker, though EcoFlow publishes no expansion ceiling on its row. Compare all three in our comparison tool, or size the battery first in getting started.
Maker pages: DELTA 3 Classic, DELTA 3 and DELTA 3 Plus at EcoFlow. Plain links, not affiliate links: EcoFlow runs no programme we belong to.