BLUETTI Elite 400 vs EcoFlow DELTA 2
Technical comparison · Home backup
BLUETTI Elite 400 and EcoFlow DELTA 2 serve different needs in the same home backup category: one is built to cover several circuits during an outage, the other for a lighter, more portable load. The difference that matters most is capacity — nearly four times higher on the BLUETTI — together with how each handles the switch to battery power.
| Parameter | ||
|---|---|---|
| In brief | ||
| Nominal capacity | 3.84 kWh | 1.024 kWh |
| Continuous output | 2600 W | 1800 W |
| Peak output | 5200 W | 2700 W |
| Cell chemistry | LFP (lithium iron phosphate) | LFP (lithium iron phosphate) |
| Cost per kWh | 520.57 €/kWh | 584.96 €/kWh |
| List price | 1999 € | 599 € |
| Weight | 39 kg | 12 kg |
| Outlets | ||
| AC outlets | Yes (×2) | 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 | 3000 cicli |
| Capacity at end of cycle life | 80 % | 80 % |
| Warranty | 5 anni | 5 anni |
| The numbers | ||
| Cost of stored energy | 0.285 €/kWh | 0.321 €/kWh |
| Energy density | 98.5 Wh/kg | 85.3 Wh/kg |
| Power-to-capacity ratio | 0.68 C | 1.76 C |
| Identity | ||
| Use tier | F3 — Flat-sized (3–8 kWh) | F2 — Room-sized (1–3 kWh) |
| Price | ||
| Price | 1699 € | — |
| Universal specs | ||
| Voltage | — | 220 V |
| Category specs | ||
| Depth of discharge | 95 % | — |
| Expandable | — | Yes |
| Fastest USB-C | 100 W | 100 W |
| Maximum charge power | 2.3 kW | 1.2 kW |
| 0–80% charge time | 88 min | — |
| Maximum solar input | 1000 W | 500 W |
| Backup power | UPS | EPS (brief interruption) |
| Switchover time | 15 ms | 30 ms |
| Ingress protection | IP20 | — |
| Mounting | Portable | Portable |
| Minimum temperature | -20 °C | -10 °C |
| Maximum temperature | 40 °C | 45 °C |
| Wheels and handle | Yes | — |
| App required for setup | No | — |
The differences that matter
- Rated capacity: 3.84 kWh vs 1.024 kWh → the BLUETTI covers more circuits or more hours, the DELTA 2 is built for a narrower use.
- Continuous output: 2600 W vs 1800 W → the BLUETTI runs more appliances at once.
- Backup power: continuous (UPS) vs EPS with a brief pause → only the BLUETTI avoids a dropout at switchover.
- Maximum solar input: 1000 W vs 500 W → the BLUETTI recharges faster from solar panels.
Which one to choose
Choose BLUETTI Elite 400 if…
Choose BLUETTI Elite 400 if you need to keep several circuits running together — a fridge, a router, a couple of lights — for several hours during an outage, without noticing the switch to battery (UPS-style continuous power). In exchange you take on a heavier unit (39 kg) that's harder to move around.
Choose EcoFlow DELTA 2 if…
Choose EcoFlow DELTA 2 if you want a lighter unit (12 kg) to carry between rooms or on trips, for a smaller set of devices. The switch to battery causes a brief interruption (EPS): fine for most household electronics, less suited to equipment that's sensitive to a short dropout.
Where to buy
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