Which EcoFlow DELTA 3? The whole family, judged against one plan
Buy the EcoFlow DELTA 3 Classic (1024Wh). In an outage it matches the EcoFlow DELTA 3 and the EcoFlow DELTA 3 Plus: the same battery, the same output, and it costs the least.
Each runs a typical fridge for 8 hours (about 670 Wh), but not an old, big one (1,000 Wh). For that fridge, or a typical fridge for a full day, buy the EcoFlow DELTA 3 Ultra Plus (3072Wh). The Classic has no extra-battery port: buy the EcoFlow DELTA 3 if you will add a battery later. Pay more for the EcoFlow DELTA 3 Plus only if you will run a big solar array: it takes 1,000 W of panels against 500 W.
Several boxes wear the DELTA 3 badge. The plain DELTA 3, the Plus and the Classic hold the same battery at three prices. Judged against a refrigerator for an 8-hour working-day outage, the EcoFlow DELTA 3 Classic (1024Wh) is the default buy for a typical fridge, unless you will add a battery.
| Model | Usable | Output | Typical day | Per usable kWh | Price | |
|---|---|---|---|---|---|---|
| Our pick |  EcoFlow DELTA 3 Classic (1024Wh) | 863 Wh | 1,800 W | one charge | $578 | $499 at Amazon |
| If you will add a battery |  EcoFlow DELTA 3 | 863 Wh | 1,800 W | one charge | $694 | $599 at Amazon |
| More solar input |  EcoFlow DELTA 3 Plus | 847 Wh | 1,800 W | one charge | $849 | $719 at Amazon |
| For a longer outage |  EcoFlow DELTA 3 Ultra Plus (3072Wh) | 2,414 Wh | 3,600 W | one charge | $662 | $1,599 at Amazon |
Who this is for
You have already settled on EcoFlow and on the DELTA 3 shelf, and what you want now is to know which one, and what the extra money actually buys. The plan on this page is deliberately narrow: a refrigerator for an 8-hour working-day outage, one fridge running by itself, nothing else on the circuit. If your question is DELTA 3, Plus or Classic, or Ultra or not, read on.
Side by side, from the makers’ own documents
“Not listed by the maker” means the maker pages we read do not state it. It is not a zero, and we never fill it from a sibling model. A dash in the price row means we show no Amazon price for that model tonight.
| Model | Battery | Continuous output | Peak output | Weight | Solar input | Expandable | Warranty | Chemistry | Verified listing |
|---|---|---|---|---|---|---|---|---|---|
| EcoFlow DELTA 3 | 1,024 Wh | 1,800 W | 3,600 W | 28 lb (12.5 kg) | 500 W | Yes, up to 5 kWh with an EcoFlow Extra Battery | 5 years | LiFePO4 | $599 |
| EcoFlow DELTA 3 Classic (1024Wh) | 1,024 Wh | 1,800 W | 3,600 W | 27 lb (12.1 kg) | 500 W | Not listed by EcoFlow | 3-year warranty, extendable to 5 years by registering | LiFePO4 | $499 |
| EcoFlow DELTA 3 Plus | 1,024 Wh | 1,800 W | 3,600 W | 28 lb (12.5 kg) | 1,000 W | Yes, via XT150 port; expandable up to 5 kWh total | 5 years | LiFePO4 | $719 |
 EcoFlow DELTA 3 Max (2048Wh) | 2,048 Wh | 2,400 W | 4,800 W | 45 lb (20.3 kg) | not listed by the maker | Not listed by EcoFlow (only the Max Plus) | 3-year warranty, extendable to 5 years by registering | LiFePO4 | $899 |
| EcoFlow DELTA 3 Max Plus (2048Wh) | 2,048 Wh | 3,000 W | 6,000 W | not listed by the maker | not listed by the maker | Yes, 2-10 kWh with Max Plus extra batteries | not listed by the maker | not stated on its product page | — |
 EcoFlow DELTA 3 Ultra (3072Wh) | 3,072 Wh | 3,600 W | 7,200 W | 72 lb (32.7 kg) | 800 W | No (the Ultra Plus takes extra batteries) | 3-year warranty, extendable to 5 years by registering | LiFePO4 | $1,299 |
| EcoFlow DELTA 3 Ultra Plus (3072Wh) | 3,072 Wh | 3,600 W | 7,200 W | 74 lb (33.7 kg) | 1,600 W | Yes, to 11 kWh with 2 DELTA Pro 3 Extra Batteries | 3-year warranty, extendable to 5 years total | LiFePO4 | $1,599 |
Against the same plan
A refrigerator for an 8-hour working-day outage, sized on the harder end of every range.
Start with what does not change. The EcoFlow DELTA 3, the EcoFlow DELTA 3 Plus and the EcoFlow DELTA 3 Classic (1024Wh) carry the same battery, output and surge. The money between them buys no capacity. It buys inputs and paperwork. The Plus takes twice the solar of the other two. The plain DELTA 3 and the Plus have an extra-battery port; the Classic has none on the maker pages we read. The DELTA 3 and the Plus carry a five-year warranty on EcoFlow's pages; the Classic's is three years, or five if you register it in the app.
Over 8 hours, an efficient new fridge needs about 400 watt-hours, a typical one about 670, and an old, big one up to 1,000. The DELTA 3, the Plus and the Classic each run a typical fridge for those hours, not an old one; the Ultra Plus, the Ultra, the Max and the Max Plus run both. Every unit here can start the compressor, which asks 600 to 2,900 watts for a moment.
| Model | Covers the energy | Carries the running load | Clears the surge | Typical day | Verdict |
|---|---|---|---|---|---|
| EcoFlow DELTA 3 | best case only | worst case | Refrigerator/freezer: starts it | one charge | Clears the best case only |
| EcoFlow DELTA 3 Classic (1024Wh) | best case only | worst case | Refrigerator/freezer: starts it | one charge | Clears the best case only |
| EcoFlow DELTA 3 Plus | best case only | worst case | Refrigerator/freezer: starts it | one charge | Clears the best case only |
| EcoFlow DELTA 3 Max (2048Wh) | worst case | worst case | Refrigerator/freezer: starts it | one charge | Clears the numbers |
| EcoFlow DELTA 3 Max Plus (2048Wh) | worst case | worst case | Refrigerator/freezer: starts it | one charge | Clears the numbers |
| EcoFlow DELTA 3 Ultra (3072Wh) | worst case | worst case | Refrigerator/freezer: starts it | one charge | Clears the numbers |
| EcoFlow DELTA 3 Ultra Plus (3072Wh) | worst case | worst case | Refrigerator/freezer: starts it | one charge | Clears the numbers |
Where the energy goes, load by load
| Load | Hours | Running watts | share of time running | Energy | Share of worst case |
|---|---|---|---|---|---|
| Refrigerator/freezer | 8 | 100–700 | see note | 400–1,000 Wh | 100% |
Refrigerator energy comes from ENERGY STAR’s certified models plus our allowance for the station and real use, from an efficient new fridge to an old, big one: see how much power a fridge uses. The right-hand end of every row is what the plan is sized on.
Our pickEcoFlow DELTA 3 Classic (1024Wh)
Buy it unless you will add a battery
$499 at Amazon, November 1, 20261,024 Wh (863 usable)1,800 W continuous3,600 W peak27 lb
Same nominal battery, same continuous output, same surge, and a hair lighter. What it gives up is inputs: half the solar ceiling and, by every account we could find, no extra-battery port at all. Whether it would accept the Plus's expansion accessory is a gap in our research rather than a confirmed no, but reviewers flag the missing port as this unit's most common complaint.
How we picked it: the cheapest unit that covers a typical day of this plan (670 Wh).
One charge covers a typical day of this plan (about 670 Wh). A hard-working refrigerator/freezer may need up to about 1,000 Wh.
Price as of November 1, 2026; the listing for this model on its own.
A refrigerator for an 8-hour working-day outage:
- Energyonly in the best case
- Running loadyes, even in the worst case
- Starting surgeRefrigerator/freezer: starts it
What you give up: The expansion port. There is no growing this one: when it runs out it runs out, and the solar ceiling means you cannot brute-force a faster refill with more panels either.
Owner reports and tester figures are on the model page.
Figures from us.ecoflow.com, captured August 13, 2026; recall screen: no published recall names this exact model (screened 2026-10-09) (how we screen, CPSC).
If you will add a batteryEcoFlow DELTA 3
Same battery, keeps the extra-battery port
$599 at Amazon, November 1, 20261,024 Wh (863 usable)1,800 W continuous3,600 W peak28 lb
The EcoFlow DELTA 3 has the same battery, output and surge as the Plus, and it keeps the extra-battery port, so you can grow it later. What it gives up is the Plus's wider solar input and faster USB-C ports, which do nothing for a fridge in an outage. For a refrigerator for an 8-hour working-day outage it covers this plan on an easy day but not on a hard one, the same as the Plus and the Classic.
Price as of November 1, 2026; the listing for this model on its own.
A refrigerator for an 8-hour working-day outage:
- Energyonly in the best case
- Running loadyes, even in the worst case
- Starting surgeRefrigerator/freezer: starts it
What you give up: Solar headroom. It takes 500 W of solar against the Plus's 1,000 W.
Owner reports and tester figures are on the model page.
Figures from us.ecoflow.com, captured August 13, 2026; recall screen: no published recall names this exact model (screened 2026-10-09) (how we screen, CPSC).
More solar inputEcoFlow DELTA 3 Plus
More solar input, same battery
$719 at Amazon, November 1, 20261,024 Wh (847 usable)1,800 W continuous3,600 W peak28 lb
The EcoFlow DELTA 3 Plus is the same battery and output as the EcoFlow DELTA 3 with wider inputs: 1,000 W of solar against 500 W, and faster USB-C ports. For a refrigerator for an 8-hour working-day outage it covers this plan on an easy day but not on a hard one, no better than the EcoFlow DELTA 3. Buy it if you will refill from a large solar array during long outages.
Price as of November 1, 2026; the listing for this model on its own.
A refrigerator for an 8-hour working-day outage:
- Energyonly in the best case
- Running loadyes, even in the worst case
- Starting surgeRefrigerator/freezer: starts it
What you give up: The premium. You pay more than the EcoFlow DELTA 3 for the same battery and the same output.
Owner reports and tester figures are on the model page.
Figures from us.ecoflow.com, captured August 12, 2026; recall screen: no published recall names this exact model (screened 2026-10-09) (how we screen, CPSC).
For a longer outageEcoFlow DELTA 3 Ultra Plus (3072Wh)
If a full day is the target
$1,599 at Amazon, November 1, 20263,072 Wh (2,414 usable)3,600 W continuous7,200 W peak74 lb
The EcoFlow DELTA 3 Ultra Plus (3072Wh) is the reach: three times the battery of the Plus and twice its continuous output, with the widest solar input we have recorded in this family, which shortens a refill rather than stretching a runtime. By EcoFlow's figures it shares its battery and output with the plain DELTA 3 Ultra and beats it on solar and on extra batteries: only the Ultra Plus takes them. Unlike the three small units, it runs even an old, big fridge for 8 hours, and a typical fridge for a full day (about 2,000 Wh) on one charge.
Price as of November 1, 2026; the listing for this model on its own.
A refrigerator for an 8-hour working-day outage:
- Energyyes, even in the worst case
- Running loadyes, even in the worst case
- Starting surgeRefrigerator/freezer: starts it
What you give up: Weight. It is more than double the Plus on the scale, a two-hand lift at best and not something you carry upstairs.
Owner reports and tester figures are on the model page.
Figures from us.ecoflow.com, captured August 13, 2026; recall screen: no published recall names this exact model (screened 2026-10-09) (how we screen, CPSC).
Buying it right
A search for these models returns bundles, sibling models and the same unit under two prices. We link only a listing whose own title states the unit on its own with its exact battery and output. Match the model number on the label to this page. How we check a listing.
- EcoFlow DELTA 3 Classic (1024Wh): we link the model on its own, checked November 1, 2026. We turned down 8 other listings (bundles, sibling models, repeats); see which and why.
- EcoFlow DELTA 3: we link the model on its own, checked November 1, 2026. We turned down 8 other listings (bundles, sibling models, repeats); see which and why.
- EcoFlow DELTA 3 Plus: we link the model on its own, checked November 1, 2026. We turned down 9 other listings (bundles, sibling models, repeats); see which and why.
- EcoFlow DELTA 3 Ultra Plus (3072Wh): we link the model on its own, checked November 1, 2026. We turned down 7 other listings (bundles, sibling models, repeats); see which and why.
What this page can’t promise
This page cannot tell you which end of that range your own fridge sits on, and that decides whether a small DELTA 3 is enough or you need the Ultra Plus.
Nothing here was tested by us. The spec figures are EcoFlow's own, read off its pages and manuals; what owners and reviewers found is labelled as theirs. Where a marketing page and its manual disagree, and here they do more than once, we say so rather than quote the better number.
Questions people ask
What's the difference between the EcoFlow DELTA 3 and the DELTA 3 Classic?
They share the same battery, output and surge. The EcoFlow DELTA 3 Classic (1024Wh) has no extra-battery port on the maker pages we read, takes a little less from the wall and costs less. Our DELTA 3 Classic vs DELTA 3 page sets them side by side.
Should I buy the DELTA 3 or the DELTA 3 Plus?
For home backup, the EcoFlow DELTA 3 Classic (1024Wh), unless you will add a battery; then the EcoFlow DELTA 3. In an outage they match: same battery, same output, same verdict. The EcoFlow DELTA 3 Plus takes 1,000 W of solar against 500 W and has faster USB-C ports. Our DELTA 3 vs DELTA 3 Plus page lists every difference.
Is the DELTA 3 Ultra worth it over the Plus?
Yes, if your fridge is old and big, or you need a full day. The EcoFlow DELTA 3 Ultra Plus (3072Wh) has three times the battery of the EcoFlow DELTA 3: it runs even an old fridge for 8 hours, and a typical fridge for a full day (about 2,000 Wh). For a typical fridge over 8 hours, the small units do the job and weigh far less.
Will any of these actually keep my fridge running for a full outage?
For 8 hours, every DELTA 3 here runs a typical fridge; only the Ultra Plus, the Ultra, the Max and the Max Plus run an old, big one. For a full day, a typical fridge needs about 2,000 Wh and an old one up to 3,100. Only the Ultra and the Ultra Plus cover a typical day on one charge, and none covers an old fridge's full day without an extra battery or a recharge.
What about the DELTA 3 Max and DELTA 3 Max Plus, are they better than the Plus?
We cannot say yet. For both we have read only the maker's product page. Solar input for both and weight for the Max Plus are not on it, and a missing figure is not a zero. Until we read those two pages to the same depth as the Plus, the Classic and the EcoFlow DELTA 3 Ultra Plus (3072Wh), we will not rank them on this page.
Can you add an extra battery to the DELTA 3 Classic?
We found no extra-battery port for it on EcoFlow's product page, support page or manual, and reviewers name that as its most common complaint. The EcoFlow DELTA 3 and the EcoFlow DELTA 3 Plus both take one.
Other plans we sized
- Home backup
- Camping and road trips
- CPAP
- Portable generators
- EcoFlow DELTA 3 vs DELTA 3 Plus: which one to buy (comparison)
- Refrigerator
- Sump pump
- Furnace
- Well pump
- Power station or generator: which do you actually need?
- How to connect a power station to your house
- Solar panels for a power station: how many, and how long
- Expansion batteries: what an extra battery for a power station actually does
EcoFlow DELTA 3 Classic (1024Wh)Our pick
$499 at Amazon