EcoFlow DELTA 2 Max vs EcoFlow DELTA 3
Technical comparison · Home backup
Two EcoFlow units with the same warranty and four mains outlets each: the DELTA 2 Max has twice the capacity, the DELTA 3 weighs almost half. The choice is between a big reserve and a light unit. Values declared by the manufacturer.
| Parameter | ||
|---|---|---|
| In brief | ||
| Nominal capacity | 2.048 kWh | 1.024 kWh |
| Continuous output | 2400 W | 1800 W |
| Peak output | 4800 W | 3600 W |
| Cell chemistry | LFP (lithium iron phosphate) | LFP (lithium iron phosphate) |
| Cost per kWh | 585.45 €/kWh | 877.93 €/kWh |
| List price | 1199 € | 899 € |
| Weight | 23 kg | 12.5 kg |
| Dimensions (W×D×H) | — | 20.2 × 39.76 × 28.36 cm |
| Outlets | ||
| AC outlets | Yes (×4) | Yes (×4) |
| How long it lasts | ||
| Battery life cycles | 1825 cicli | 1825 cicli |
| The limit that runs out first | anni di garanzia | anni di garanzia |
| Rated cycles | 3000 cicli | 4000 cicli |
| Capacity at end of cycle life | 80 % | 80 % |
| Warranty | 5 anni | 5 anni |
| The numbers | ||
| Cost of stored energy | 0.321 €/kWh | 0.481 €/kWh |
| Energy density | 89 Wh/kg | 81.9 Wh/kg |
| Power-to-capacity ratio | 1.17 C | 1.76 C |
| Identity | ||
| Use tier | F2 — Room-sized (1–3 kWh) | F2 — Room-sized (1–3 kWh) |
| Price | ||
| Price | — | ~450–1000 € |
| Universal specs | ||
| Voltage | 220 V | — |
| Category specs | ||
| Expandable | Yes | Yes |
| Maximum expanded capacity | 6.144 kWh | 5 kWh |
| Fastest USB-C | 100 W | 100 W |
| Maximum charge power | 2.4 kW | 1.5 kW |
| 0–80% charge time | 53 min | — |
| Maximum solar input | 1000 W | 500 W |
| Backup power | EPS (brief interruption) | UPS |
| Switchover time | 20 ms | 10 ms |
| Mounting | Portable | Portable |
| Minimum temperature | -10 °C | — |
| Maximum temperature | 45 °C | — |
| Noise level | — | 30 dB |
The differences that matter
- Capacity 2.048 kWh vs 1.024 kWh and weight 23 kg vs 12.5 kg → the double reserve costs about 10 kg more to move.
- Solar input 1000 W vs 500 W → in theory, in full sun and without losses, solar charging takes the same time, about 2 hours, because the capacity is double: the 2 Max keeps pace, it does not fill sooner.
- Switchover 20 ms with a gap (EPS) vs 10 ms (UPS) → the DELTA 3 aims at uninterrupted supply, the DELTA 2 Max declares a brief pause.
- Declared cycles 3000 vs 4000 → with the same 5-year warranty and one cycle a day, the cover lasts 1825 cycles for both: the cycle difference does not change the years.
Which one to choose
Choose EcoFlow DELTA 2 Max if…
you use the unit as a fixed home reserve and want to recharge it at up to 2.4 kW declared, with loads up to 2400 W (4800 W peak) and declared operation from -10 to 45 °C. You accept a much heavier unit to move and a switchover with a gap.
Choose EcoFlow DELTA 3 if…
you carry the storage between house and car and 1800 W continuous (3600 W peak) is enough; declared noise 30 dB, charging up to 1.5 kW. You accept half the capacity and slower charging.
Where to buy
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