EcoFlow DELTA 3 Max: what it runs and for how long
The EcoFlow DELTA 3 Max is a 2,048 Wh LiFePO4 portable power station with a 2,400 W inverter (4,800 W surge). Compared with the EcoFlow DELTA 3 Max Plus, it has 2,400 W of AC output instead of 3,000 W and 4,800 W of surge instead of 6,000 W. It meets our requirements for keeping a fridge running in an outage, RVs and van life, plus 3 more uses.
What can the EcoFlow DELTA 3 Max run, and for how long?
Combine loads in the EcoFlow DELTA 3 Max runtime calculatorOn a full charge it runs a refrigerator for about 26 h and a chest freezer for about 2.2 days.
Who is the EcoFlow DELTA 3 Max a good fit for?
The EcoFlow DELTA 3 Max meets every requirement for 6 of the 12 uses we filter for.
- ✓Keeping a fridge running in an outage
- ✓RVs
- ✓Van life
- ✓UPS use with computers and routers
- ✓Running a window AC for several hours
- ✓Starting a 120 V well or sump pump
- ?Home backup · can’t be checked: EcoFlow doesn’t publish the expandable figure
- ✕Carrying a CPAP on trips (light enough to pack) · needs weight ≤ 20 lb; the EcoFlow DELTA 3 Max has 44.8 lb
- ✕Fast solar charging · needs solar input ≥ 800 W; the EcoFlow DELTA 3 Max has 500 W
- ✕Balcony solar and apartments · needs weight ≤ 40 lb; the EcoFlow DELTA 3 Max has 44.8 lb
- ✕A LiFePO4 station under $500 · needs list price ≤ $500; the EcoFlow DELTA 3 Max has $1,199
Can the EcoFlow DELTA 3 Max work as a UPS?
EcoFlow lists a switchover time of 10 ms for the EcoFlow DELTA 3 Max, inside the 20 ms gap that the ITI (CBEMA) reference says typical computer equipment should ride through.
How fast does the EcoFlow DELTA 3 Max recharge?
From a wall outlet it charges at up to 1,800 W; EcoFlow doesn't publish a full-charge time. From solar it needs about 5.5 hours of strong sun at its 500 W solar limit, with panels delivering 75% of their rating.
What are the EcoFlow DELTA 3 Max's full specifications?
These figures come from EcoFlow's official US page, checked 2026-10-12. "Not published" marks specs EcoFlow doesn't publish.
| Capacity | 2,048 Wh |
|---|---|
| Battery chemistry | LiFePO4 |
| Rated cycles | Not published EcoFlow does not state a cycle count. |
| AC output (continuous) | 2,400 W X-Boost mode is listed at 3,400 W. |
| AC surge | 4,800 W EcoFlow does not state a surge rating. |
| AC outlets | 4 |
| Max USB-C output | 100 W |
| Max solar input | 500 W |
| Max AC charging input | 1,800 W |
| AC charge time (fastest mode) | Not published 1,800 W input reaches 80% in 68 minutes; no 0-100% AC charge time is given. |
| Expandable | Not published EcoFlow's page does not state whether it is expandable. |
| Max with extra batteries | Not published |
| UPS switchover | 10 ms |
| Weight | 44.8 lb |
| Dimensions | 19.4 × 9.4 × 12.0 in |
| List price | $1,199 |
How does the EcoFlow DELTA 3 Max rank against other 2,000–2,999 Wh power stations?
Among the 10 current 2,000–2,999 Wh models, the EcoFlow DELTA 3 Max is in the top third for capacity, surge, AC charging speed and UPS switchover and in the bottom third for solar input.
| Spec | EcoFlow DELTA 3 Max | Rank in band | vs band median | vs band leader |
|---|---|---|---|---|
| Capacity | 2,048 Wh | 3rd of 10 | level | -20% vs Anker SOLIX F2600 |
| AC output | 2,400 W | 4th of 10 | level | -20% vs EcoFlow DELTA 3 Max Plus |
| Surge | 4,800 W | 2nd of 8 | +4% | -20% vs EcoFlow DELTA 3 Max Plus |
| Solar input | 500 W | 8th of 9 | -50% | -72% vs DJI Power 2000 |
| AC charging | 1,800 W | 1st of 8 | level | level vs EcoFlow DELTA 3 Max Plus |
| Rated cycles | Not published | — | — | — |
| Weight | 44.8 lb | 5th of 10 | -4% | +25% vs Anker SOLIX S2000 |
| UPS switchover | 10 ms | 1st of 9 | level | level vs EcoFlow DELTA 3 Max Plus |
| Wh per list $ | 1.71 | 4th of 10 | +4% | -26% vs BLUETTI Elite 200 V2 |
Who should not buy the EcoFlow DELTA 3 Max?
Skip the EcoFlow DELTA 3 Max if any of these describe you; each comes from its published specs.
- You rely on solar. Even at its full 500 W solar input it needs about 4.1 hours of strong sun to refill, slower than most models its size. The DJI Power 2000 needs about 1.1 hours at its limit.
- You may want more battery later. The EcoFlow DELTA 3 Max isn't listed as expandable. The EcoFlow DELTA 3 Max Plus (2,048 Wh) accepts extra batteries.
How long does the EcoFlow DELTA 3 Max last at different loads?
About 1,741 Wh reaches the AC outlets, so a steady 100 W load runs for about 17 h and a load at its full 2,400 W rating for about 44 minutes.
| Steady AC load | Runtime from full |
|---|---|
| 25 W | 2.9 days |
| 50 W | 35 h |
| 100 W | 17 h |
| 200 W | 8.7 h |
| 300 W | 5.8 h |
| 500 W | 3.5 h |
| 750 W | 2.3 h |
| 1,000 W | 1.7 h |
| 1,500 W | 1.2 h |
| 2,000 W | 52 min |
| 2,400 W | 44 min |
How many hours of sun does the EcoFlow DELTA 3 Max need to refill?
With panels delivering 75% of their rating (our calculator's default), the EcoFlow DELTA 3 Max needs the hours of strong sun below. Its 500 W solar limit caps the charge rate, so panels beyond about 667 W add nothing in strong sun.
| Panels | Charge rate | Sun hours to refill |
|---|---|---|
| 100 W of panels | 75 W | 27.3 h |
| 200 W of panels | 150 W | 13.7 h |
| 400 W of panels | 300 W | 6.8 h |
| 800 W of panels | 500 W | 4.1 h |
What can the EcoFlow DELTA 3 Max run at the same time?
The EcoFlow DELTA 3 Max can carry 9 of the 10 common pairs we check at once, with the runtimes below. It can't carry microwave oven + electric kettle: together they pass its running or start-up limit.
| Together | Runtime from full |
|---|---|
| refrigerator + wi-Fi router / modem | 20 h |
| refrigerator + chest freezer | 18 h |
| refrigerator + microwave oven | 1.6 h |
| refrigerator + electric kettle | 1.1 h |
| CPAP with heated humidifier + wi-Fi router / modem | 23 h |
| TV + wi-Fi router / modem | 12 h |
| window air conditioner + refrigerator | 2.2 h |
| sump pump + refrigerator | 2.0 h |
| space heater + wi-Fi router / modem | 1.1 h |
Which EcoFlow DELTA 3 Max specs are unpublished or conditional?
EcoFlow doesn't publish these specs for the EcoFlow DELTA 3 Max: rated cycles.
5 published figures come with conditions, shown under the spec table: AC charge time, AC output, expandability, rated cycles and surge.
How does the EcoFlow DELTA 3 Max compare with similar power stations?
By capacity, the nearest models from other brands are Anker SOLIX C2000 Gen 2, DJI Power 2000 and Jackery HomePower 2000 Plus v2.
How is the EcoFlow DELTA 3 Max different from the EcoFlow DELTA 3 Max Plus?
The EcoFlow DELTA 3 Max Plus is the closest EcoFlow model. Pick the EcoFlow DELTA 3 Max if you want a lower list price and less weight; otherwise the EcoFlow DELTA 3 Max Plus gives you the opposite trade-off.
| EcoFlow DELTA 3 Max | EcoFlow DELTA 3 Max Plus | |
|---|---|---|
| AC output | 2,400 W | 3,000 W |
| Surge | 4,800 W | 6,000 W |
| Weight | 44.8 lb | 48.7 lb |
| Solar input | 500 W | 1,000 W |
| Expandable | Not published | Yes |
| List price | $1,199 | $1,599 |
Which models from other brands are closest in size?
Anker SOLIX C2000 Gen 2
DJI Power 2000
Jackery HomePower 2000 Plus v2Which other EcoFlow models are similar?
How this page was made. Specs come from each manufacturer's official US spec page or manual, checked on the date shown; specs a manufacturer doesn't publish are marked "Not published". Runtimes are calculated (capacity × 85% inverter efficiency ÷ appliance draw), not measured. We haven't hands-on tested these units. Method and sources · Affiliate disclosure