EcoFlow DELTA 2 Max Runtime Calculator
2,048 Wh LiFePO4 · 2,400 W AC (4,800 W surge) · runs a 34 W CPAP with humidifier about 32–38 h
Specs verified 8 Oct 2026 from ecoflow.com
KiloHour is independent and not affiliated with or endorsed by EcoFlow. EcoFlow and product names are trademarks of their respective owners. Images: EcoFlow.
At a glance
What the DELTA 2 Max runs
From its 2,400 W AC outlets, 5 of 6 listed devices last their usual hours, the space heater does not.
- Runs it
Fridge 123 W
28–33 h
123 W running and a 800 W startup peak fit within the DELTA 2 Max's 2,400 W continuous and 4,800 W surge ratings. Runtime at its 41 W average, as the compressor cycles.
- Runs it
Microwave (1,000 W cooking power) 1500 W
1 h
1,500 W running and a 1,500 W startup peak fit within the DELTA 2 Max's 2,400 W continuous and 4,800 W surge ratings.
- Tight fit
Space heater 1500 W
1 h
It runs about 1 h 4 min, short of the 4 h you need.
- Runs it
TV 120 W
11–12 h
120 W running and a 120 W startup peak fit within the DELTA 2 Max's 2,400 W continuous and 4,800 W surge ratings.
- Runs it
CPAP with humidifier 34 W
32–38 h
34 W running and a 34 W startup peak fit within the DELTA 2 Max's 2,400 W continuous and 4,800 W surge ratings.
- Runs it
Wi-Fi router 10 W
2.8–3.6 days
10 W running and a 10 W startup peak fit within the DELTA 2 Max's 2,400 W continuous and 4,800 W surge ratings.
Spec sheet
DELTA 2 Max verified specs
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Our take
What the DELTA 2 Max is good at, and what to watch for
KiloHour take Suits buyers who want 2kWh for a fridge, microwave or window air conditioner with room to expand, but at 50 lb it is a two-hand carry and no UPS switchover time is published.
The DELTA 2 Max is EcoFlow's 2kWh class unit: 2,048Wh of LiFePO4, 2,400W continuous across six AC outlets and a 4,800W surge rating. X-Boost lets resistive loads run up to 3,400W at reduced voltage. That combination handles a fridge, a microwave or a window air conditioner more comfortably than a 1kWh station.
Charging is flexible. EcoFlow lists 1,800W AC fast charging and two solar inputs at 500W each for 1,000W combined, plus support for a car outlet, its Smart Generator and an optional 800W alternator charger. The battery is rated for 3,000 cycles to 80 percent capacity, and capacity expands to 6,144Wh with up to two DELTA 2 Max Smart Extra Batteries. Wi-Fi and Bluetooth app control and a five-year warranty are included.
The main drawback is weight. At 50 lb (23 kg) it is a carry-with-two-hands or wheel-it-in product, not something to move around a campsite casually. The spec sheet we read does not publish a UPS switchover time, so treat it as pass-through power rather than a guaranteed UPS for sensitive equipment unless EcoFlow confirms otherwise. Its rated cycle count is lower than some newer models that list 4,000 cycles.
Sources: ecoflow.com, ecoflow.com
Same brand
Other EcoFlow models
| Model | Capacity | AC output | Solar input | Weight |
|---|---|---|---|---|
| DELTA 3Smaller | 1,024 Wh (−1,024 Wh) | 1,800 W | 500 W | 27.6 lb |
| DELTA 3 UltraLarger | 3,072 Wh (+1,024 Wh) | 3,600 W | 800 W | Not published |
| DELTA 3 MaxSame capacity | 2,048 Wh | 2,400 W | 500 W | Not published |
Alternatives
Other brands near 2,048 Wh
| Model | Capacity | AC output | Solar input | Weight |
|---|---|---|---|---|
| Anker SOLIX C2000 Gen 2Same capacity | 2,048 Wh | 2,400 W | 800 W | 41.7 lb |
| DJI Power 2000Same capacity | 2,048 Wh | 3,000 W | Not published | Not published |
| Jackery Explorer 2000 PlusSame capacity | 2,043 Wh (−5 Wh) | 3,000 W | 1,400 W | 61.5 lb |
FAQ
DELTA 2 Max questions
Answers use the same published specs and labelled assumptions as the calculator.
How long will the DELTA 2 Max last?
2,048 Wh stored, about 1,843 Wh of it usable at the typical estimate. At its full 2,400 W rating it empties in about 38–41 min.
What is X-Boost on the DELTA 2 Max?
X-Boost lifts the limit to 3,400 W, for resistive loads (kettles, heaters) only. Motors and electronics stay capped at 2,400 W. Motor starts can briefly pull up to 4,800 W.
Can you add batteries to the DELTA 2 Max?
Yes. EcoFlow lists expansion to 6,144 Wh, about 3 times the built-in 2,048 Wh.
What is the DELTA 2 Max solar input?
Up to 1,000 W of panels. A single 200 W panel needs about 2.8 sunny days; panels at the full 1,000 W need about 2.8 peak-sun hours. Panels are assumed to deliver 75% of their rating.
Can the DELTA 2 Max run a CPAP overnight?
Yes: 4 nights of 8 hours from a CPAP drawing 34 W with its heated humidifier and tube on (ResMed's measured figure).