EcoFlow DELTA 3 Max Plus Runtime Calculator
2,048 Wh LiFePO4 · 3,000 W AC (6,000 W surge) · runs a 34 W CPAP with humidifier about 32–38 h
Specs verified 10 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 3 Max Plus runs
From its 3,000 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 3 Max Plus's 3,000 W continuous and 6,000 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 3 Max Plus's 3,000 W continuous and 6,000 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 3 Max Plus's 3,000 W continuous and 6,000 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 3 Max Plus's 3,000 W continuous and 6,000 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 3 Max Plus's 3,000 W continuous and 6,000 W surge ratings.
Spec sheet
DELTA 3 Max Plus verified specs
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Our take
What the DELTA 3 Max Plus is good at, and what to watch for
KiloHour take Pick it if you want 2kWh that runs 3,000W loads today and can expand to 10kWh later, but expansion needs an adapter plus DELTA Pro 3 batteries, and it is heavier than the DELTA 3 Max.
The DELTA 3 Max Plus pairs 2,048Wh of LiFePO4 with 3,000W continuous output and a 6,000W surge rating, and X-Boost runs resistive loads up to 3,800W at reduced voltage. The DELTA 3 Max has the same capacity but is rated at 2,400W, and EcoFlow says the Plus has 25 percent more output than the DELTA 2 Max.
Charging is where it pulls further ahead. Wall charging runs at 1,800W with 0 to 80 percent in 64 minutes. A Smart Generator 4000 can charge it at up to 2,600W, reaching 80 percent in 43 minutes, and the generator can start and stop automatically when the battery runs low. Solar input reaches 1,000W, which EcoFlow says gets it to 80 percent in about 96 minutes, and pairing solar with a 1,000W alternator charger cuts that to 51 minutes.
It is also the expandable one of the two 2kWh DELTA 3 models. EcoFlow lists 2 to 10kWh, with the 10kWh figure needing two DELTA Pro 3 Smart Extra Batteries and the Smart Extra Battery Expansion Adapter.
Ports include 140W USB-C, a 126W car outlet and a 378W Anderson 12V output that shares power with it. EcoFlow lists a UPS switchover under 10 ms and noise of 25 dB or less at 600W.
The costs are weight and accessories. It weighs 22.1 kg, and the 800W Alternator Charger needs an adapter to connect.
Sources: ecoflow.com, 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 2 MaxSame capacity | 2,048 Wh | 2,400 W | 1,000 W | 50 lb |
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 3 Max Plus questions
Answers use the same published specs and labelled assumptions as the calculator.
How long will the DELTA 3 Max Plus last?
2,048 Wh stored, about 1,843 Wh of it usable at the typical estimate. At its full 3,000 W rating it empties in about 30–33 min.
What is X-Boost on the DELTA 3 Max Plus?
X-Boost lifts the limit to 3,800 W, for resistive loads (kettles, heaters) only. Motors and electronics stay capped at 3,000 W. Motor starts can briefly pull up to 6,000 W.
Can you add batteries to the DELTA 3 Max Plus?
Yes. EcoFlow lists expansion to 10,000 Wh, about 4.8 times the built-in 2,048 Wh.
What is the DELTA 3 Max Plus 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 3 Max Plus 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).