EcoFlow DELTA 2 Max vs EcoFlow DELTA 3 Classic
Technical comparison · Home backup
Same family, same job: powering a home or workspace through an outage and in everyday use. Size decides it: the DELTA 2 Max holds twice the energy and takes twice the solar input, while the DELTA 3 Classic weighs about half. All figures are manufacturer-declared.
| Parameter | ||
|---|---|---|
| In brief | ||
| Nominal capacity | 2.048 kWh | 1.024 kWh |
| Continuous output | 2400 W | 1800 W |
| Peak output | 4800 W | 3000 W |
| Cell chemistry | LFP (lithium iron phosphate) | LFP (lithium iron phosphate) |
| Cost per kWh | 585.45 €/kWh | 584.96 €/kWh |
| List price | 1199 € | 599 € |
| Weight | 23 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 | 89 Wh/kg | 84.6 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 | — |
| Maximum expanded capacity | 6.144 kWh | — |
| Fastest USB-C | 100 W | 100 W |
| Maximum charge power | 2.4 kW | 1.4 kW |
| 0–80% charge time | 53 min | 60 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 | -10 °C |
| Maximum temperature | 45 °C | 45 °C |
The differences that matter
- Capacity, 2.048 kWh vs 1.024 kWh → at the same load and without losses, the DELTA 2 Max stays on twice as long.
- Solar input, 1000 W vs 500 W → in theory both fill in about two hours of full sun, but the DELTA 2 Max stores twice the energy in that time.
- Continuous output, 2400 W vs 1800 W → 600 W more combined load before the rated limit.
- Switchover, 20 ms with a brief pause (EPS) vs 10 ms in continuity mode (UPS) → the DELTA 3 Classic takes over faster.
Which one to choose
Choose EcoFlow DELTA 2 Max if…
the unit works every day, filled from panels during the day and drained in the evening. A 5-year warranty against 3 covers that rhythm for longer. You accept 23 kg against 12.1 kg.
Choose EcoFlow DELTA 3 Classic if…
the unit has to move, from one room to another or out to the car: it weighs 12.1 kg. You give up half the energy and half the solar input, and the warranty is shorter.
Where to buy
Paid link: the price for you does not change.
As an Amazon Associate I earn from qualifying purchases.
The purchase links are the same as on the two product pages and don't influence the verdict. The product pages have the complete data.