EcoFlow DELTA 3 1500 vs EcoFlow DELTA Pro
Technical comparison · Home backup
These are two home backup units of different size: 1.536 kWh and 1800 W against 3.6 kWh and 3600 W. The first offers a longer warranty and a switchover without a gap; the second has the capacity and power for heavy loads (manufacturer-declared figures).
| Parameter | ||
|---|---|---|
| In brief | ||
| Nominal capacity | 1.536 kWh | 3.6 kWh |
| Continuous output | 1800 W | 3600 W |
| Peak output | 3600 W | 7200 W |
| Cell chemistry | LFP (lithium iron phosphate) | LFP (lithium iron phosphate) |
| Cost per kWh | 845.7 €/kWh | 610.83 €/kWh |
| List price | 1299 € | 2199 € |
| Weight | — | 45 kg |
| Dimensions (W×D×H) | 21.3 × 39.8 × 28.15 cm | — |
| Outlets | ||
| AC outlets | Yes (×4) | Yes (×4) |
| 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 | 3500 cicli |
| Capacity at end of cycle life | 70 % | 80 % |
| Warranty | 5 anni | 3 anni |
| The numbers | ||
| Cost of stored energy | 0.463 €/kWh | 0.558 €/kWh |
| Energy density | — | 80 Wh/kg |
| Power-to-capacity ratio | 1.17 C | 1 C |
| Identity | ||
| Use tier | F2 — Room-sized (1–3 kWh) | F3 — Flat-sized (3–8 kWh) |
| Price | ||
| Price | 1299 € | — |
| Universal specs | ||
| Voltage | — | 220 V |
| Category specs | ||
| Expandable | Yes | Yes |
| Maximum expanded capacity | 5.5 kWh | — |
| Fastest USB-C | 100 W | 100 W |
| Maximum charge power | 1.5 kW | 2.875 kW |
| 0–80% charge time | 60 min | — |
| Maximum solar input | 500 W | 1600 W |
| Backup power | UPS | EPS (brief interruption) |
| Switchover time | 15 ms | 30 ms |
| Ingress protection | IP54 | — |
| Mounting | Portable | Portable |
| Minimum temperature | — | -10 °C |
| Maximum temperature | — | 45 °C |
| Noise level | 45 dB | — |
| Wheels and handle | — | Yes |
The differences that matter
- 500 W → 1600 W solar input: the second recharges from panels far faster.
- 1.536 kWh → 3.6 kWh: at the same load the second lasts more than twice as long.
- UPS 15 ms → EPS 30 ms: the first switches over without a gap, the second with a brief pause.
Which one to choose
Choose EcoFlow DELTA 3 1500 if…
you want a backup for a few appliances that takes over from the grid without a break (UPS, 15 ms declared), with a 5-year warranty and IP54 protection. It can grow to 5.5 kWh with extra batteries. The trade-off: 1800 W continuous and panel charging up to 500 W.
Choose EcoFlow DELTA Pro if…
you need to run appliances above 1800 W together, or cover a long day without grid power: 3600 W continuous and solar input up to 1600 W. The trade-off: 45 kg, even with wheels and a handle, and a 3-year warranty.
Where to buy
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