BLUETTI Apex 300 vs EcoFlow DELTA Pro Ultra
Technical comparison · High capacity
What decides it is the length of coverage: a 2-year warranty against 5. Size also differs, 2.7648 kWh and 3840 W against 6.144 kWh and 6900 W (manufacturer-declared figures).
| Parameter | ||
|---|---|---|
| Awards | ||
| In brief | ||
| Nominal capacity | 2.7648 kWh | 6.144 kWh |
| Continuous output | 3840 W | 6900 W |
| Peak output | 7680 W | — |
| Cell chemistry | LFP (lithium iron phosphate) | LFP (lithium iron phosphate) |
| Cost per kWh | 723.02 €/kWh | 829.75 €/kWh |
| List price | 1999 € | 5098 € |
| Weight | 38 kg | — |
| Dimensions (W×D×H) | 52.5 × 32.7 × 32 cm | — |
| Outlets | ||
| AC outlets | — | Yes (×5) |
| How long it lasts | ||
| Battery life cycles | 730 cicli | 1825 cicli |
| The limit that runs out first | anni di garanzia | anni di garanzia |
| Rated cycles | 6000 cicli | 3500 cicli |
| Capacity at end of cycle life | 80 % | 80 % |
| Warranty | 2 anni | 5 anni |
| The numbers | ||
| Cost of stored energy | 0.99 €/kWh | 0.455 €/kWh |
| Energy density | 72.8 Wh/kg | — |
| Power-to-capacity ratio | 1.39 C | 1.12 C |
| Identity | ||
| Use tier | F2 — Room-sized (1–3 kWh) | F3 — Flat-sized (3–8 kWh) |
| Price | ||
| Price | 1749 € | — |
| Universal specs | ||
| Voltage | — | 220 V |
| Category specs | ||
| Expandable | Yes | Yes |
| Maximum expanded capacity | 21.1968 kWh | 30 kWh |
| Fastest USB-C | — | 100 W |
| Maximum solar input | 2400 W | 4000 W |
| Backup power | UPS | UPS |
| Switchover time | 20 ms | 20 ms |
| Standby consumption | 20 W | — |
| Ingress protection | IP20 | IP54 |
| Mounting | Portable | Portable |
| Minimum temperature | — | -20 °C |
| Maximum temperature | — | 45 °C |
| Cell heating | — | Yes |
| Noise level | — | 30 dB |
| Wheels and handle | — | Yes |
| Declared standards | — | CE, IEC 62619, IEC 62477 |
JouleSpecs Awards
Most capable Room-sized (1–3 kWh)
Highest technical score among the 4 sheets in the High capacity category (room-sized tier): 67/100.
How we assign awards →Most capable Flat-sized (3–8 kWh)
Highest technical score among the 4 sheets in the High capacity category (flat-sized tier): 86/100.
How we assign awards →The differences that matter
- 2 years → 5 years of warranty: the second is covered three years longer.
- 3840 W → 6900 W continuous: only the second handles a 5000 W load.
- 2400 W → 4000 W solar input: the second accepts more panels.
- IP20 → IP54: the first must be kept indoors and dry, the second tolerates dust and splashes.
Which one to choose
Choose BLUETTI Apex 300 if…
a 2.7648 kWh unit is enough, expandable to 21.1968 kWh, kept indoors and dry (IP20) for loads up to 3840 W. The trade-off: a 2-year warranty and a declared idle draw of 20 W, which if left on is about half a kWh a day.
Choose EcoFlow DELTA Pro Ultra if…
you need to run loads up to 6900 W with panels up to 4000 W, and want IP54 protection, heated cells and operation from −20 to 45 °C. The trade-off: it is the largest size, at 6.144 kWh; it has wheels and a handle, but it is not something you move often.
Where to buy
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