EcoFlow
EcoFlow DELTA 2 Max
$1,049 · Lifetime $0.17/kWh over 3,000 rated cycles · MSRP $1,299Checked against EcoFlow's product page today.
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What it actually runs
Usable energy ≈ 1,741 Wh after our standard 85% inverter-efficiency assumption. Methodology
| CPAP overnightCPAP, humidifier off (40 W × 8 h) | ~44 h continuous · 5.4 days at typical daily use |
|---|---|
| EssentialsFridge + wifi + 3 lights (~190 W continuous) | ~9.2 h continuous · 1.0 days at typical daily use |
| Storm kitFridge + sump pump + lights + phones (~1,000 W) | ~1.7 h continuous · 0.4 days at typical daily use |
| Quick equivalents | ≈ 5 CPAP nights · 12 h of fridge · 87 phone charges |
How long will it run YOUR appliance?
Solar recharge
The DELTA 2 Max accepts up to 1,000 W of solar input — panels beyond that sit idle. To sustain an essentials load (~1,680 Wh/day) off-grid you'd need roughly 470 W of panels, within this unit’s cap — sun permitting, it can run essentials indefinitely.
Compatible kits: EcoFlow 220W Bifacial (220 W) · EcoFlow 400W Portable (400 W) · Renogy 200W Rigid (MC4) (200 W) · Rich Solar 400W Kit (MC4) (400 W) · Bluetti PV420 (420 W) · Anker SOLIX PS400 (400 W) · EcoFlow NextGen 160W (160 W) · Renogy 400W Portable Suitcase (400 W).
Specifications
| Capacity | 2,048 Wh |
|---|---|
| Usable (85%) | 1,741 Wh |
| AC output | 2,400 W |
| Surge output | 4,800 W |
| Max solar input | 1,000 W |
| Outage switchover | Basic EPS, 30 ms (maker excludes life-support use) |
| Output waveform | Pure sine wave |
| Battery chemistry | LiFePO4 (LFP) |
| Expandable battery | Yes |
| Rated cycles | 3,000 |
| Third-party solar | MC4 panels supported |
| Lifetime cost | $0.17/kWh |
Alternatives to consider
- Bluetti AC200L — 2,048 Wh / 2,400 W at $899 · compare head-to-head →
- Anker SOLIX F2000 — 2,048 Wh / 2,400 W at $899 · compare head-to-head →
Common questions
How long will the EcoFlow DELTA 2 Max run a refrigerator?
About 12 hours of compressor running time — which at a realistic duty cycle covers roughly 1.5 days of normal fridge use. Estimates use usable capacity (85% of rated) and carry ±15%.
Can the DELTA 2 Max run a CPAP?
Yes — a 40 W CPAP runs about 5 full nights per charge without humidification. A heated humidifier roughly triples the draw and cuts nights to ~1.
Can it run a space heater?
Yes on output — a 1,500 W heater draws within this unit's 2,400 W rating — but only for ~1.2 hours. Resistive heat is the fastest way to drain any battery; an electric blanket (100 W) runs ~17 hours instead.
How fast does the DELTA 2 Max recharge from solar?
At its 1,000 W input cap, roughly 2.6 hours of good sun for a full refill (real-world 80% derate applied). Cloud cover stretches that substantially.