EcoFlow DELTA 2 vs EcoFlow DELTA 3 Classic
Technical comparison · Home backup
Same 1.024 kWh capacity, same 1,800 W continuous output, same chemistry: what matters is what surrounds the cell pack. DELTA 2 carries a five-year warranty and switches with a 30 ms gap; DELTA 3 Classic carries three years and switches in 10 ms. Figures are manufacturer-declared.
| Parameter | ||
|---|---|---|
| In brief | ||
| Nominal capacity | 1.024 kWh | 1.024 kWh |
| Continuous output | 1800 W | 1800 W |
| Peak output | 2700 W | 3000 W |
| Cell chemistry | LFP (lithium iron phosphate) | LFP (lithium iron phosphate) |
| Cost per kWh | 584.96 €/kWh | 584.96 €/kWh |
| List price | 599 € | 599 € |
| Weight | 12 kg | 12.1 kg |
| Dimensions (W×D×H) | — | 39.8 × 20 × 28.3 cm |
| Outlets | ||
| AC outlets | Yes (×4) | Yes (×3) |
| USB-C ports | — | Yes (×2) |
| USB-A ports | — | Yes |
| 12 V outputs | — | No |
| How long it lasts | ||
| Battery life cycles | 1825 cicli | 1095 cicli |
| The limit that runs out first | anni di garanzia | anni di garanzia |
| Rated cycles | 3000 cicli | — |
| Capacity at end of cycle life | 80 % | — |
| Warranty | 5 anni | 3 anni |
| The numbers | ||
| Cost of stored energy | 0.321 €/kWh | 0.534 €/kWh |
| Energy density | 85.3 Wh/kg | 84.6 Wh/kg |
| Power-to-capacity ratio | 1.76 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 | — |
| Fastest USB-C | 100 W | 100 W |
| Maximum charge power | 1.2 kW | 1.4 kW |
| 0–80% charge time | — | 60 min |
| Maximum solar input | 500 W | 500 W |
| Backup power | EPS (brief interruption) | UPS |
| Switchover time | 30 ms | 10 ms |
| Mounting | Portable | Portable |
| Minimum temperature | -10 °C | -10 °C |
| Maximum temperature | 45 °C | 45 °C |
The differences that matter
- Warranty: 5 years → 3 years: at the same capacity, DELTA 3 Classic is covered two years less.
- Switchover: 30 ms with a gap (EPS) → 10 ms continuous (UPS): it matters for anything connected that cannot tolerate even a brief interruption.
- Peak: 2,700 W → 3,000 W: a load that starts above 2,700 W only runs on the second.
Which one to choose
Choose EcoFlow DELTA 2 if…
you keep it for years as a home reserve and the longer warranty counts, with 3,000 cycles declared, the option to add expansion batteries and four mains sockets. The trade-off: in an outage it switches with a declared 30 ms gap and charges at 1.2 kW at most.
Choose EcoFlow DELTA 3 Classic if…
you power equipment that cannot tolerate interruptions and need the 10 ms switchover; it charges at up to 1.4 kW, with 0-80% in a declared 60 minutes, and has two USB-C and one USB-A next to the mains sockets. The trade-off: three mains sockets instead of four and a shorter warranty.
Where to buy
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