BLUETTI AC240P vs EcoFlow DELTA Pro Ultra
Technical comparison · High capacity
Two different sizes: 1.843 kWh and 2400 W against 6.144 kWh and 6900 W. The first is a compact unit for modest loads and tough environments (IP65); the second runs several large appliances together (manufacturer-declared figures).
| Parameter | ||
|---|---|---|
| Awards | — | |
| In brief | ||
| Nominal capacity | 1.843 kWh | 6.144 kWh |
| Continuous output | 2400 W | 6900 W |
| Peak output | 3600 W | — |
| Cell chemistry | LFP (lithium iron phosphate) | LFP (lithium iron phosphate) |
| Cost per kWh | 1247.42 €/kWh | 829.75 €/kWh |
| List price | 2299 € | 5098 € |
| Weight | 33 kg | — |
| Dimensions (W×D×H) | 41.95 × 29.35 × 40.95 cm | — |
| Outlets | ||
| AC outlets | Yes (×4) | Yes (×5) |
| How long it lasts | ||
| Battery life cycles | 2190 cicli | 1825 cicli |
| The limit that runs out first | anni di garanzia | anni di garanzia |
| Rated cycles | 3500 cicli | 3500 cicli |
| Capacity at end of cycle life | 80 % | 80 % |
| Warranty | 6 anni | 5 anni |
| The numbers | ||
| Cost of stored energy | 0.57 €/kWh | 0.455 €/kWh |
| Energy density | 55.8 Wh/kg | — |
| Power-to-capacity ratio | 1.3 C | 1.12 C |
| Identity | ||
| Use tier | F2 — Room-sized (1–3 kWh) | F3 — Flat-sized (3–8 kWh) |
| Price | ||
| Price | 2299 € | — |
| Universal specs | ||
| Voltage | — | 220 V |
| Category specs | ||
| Expandable | Yes | Yes |
| Maximum expanded capacity | 10.443 kWh | 30 kWh |
| Fastest USB-C | 100 W | 100 W |
| 0–80% charge time | 45 min | — |
| Maximum solar input | 1200 W | 4000 W |
| Backup power | UPS | UPS |
| Switchover time | 15 ms | 20 ms |
| Ingress protection | IP65 | IP54 |
| Mounting | Portable | Portable |
| Minimum temperature | -20 °C | -20 °C |
| Maximum temperature | 40 °C | 45 °C |
| Cell heating | — | Yes |
| Noise level | 53 dB | 30 dB |
| Wheels and handle | — | Yes |
| Declared standards | CE | CE, IEC 62619, IEC 62477 |
JouleSpecs Awards
No awards in this tier.
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
- 2400 W → 6900 W continuous: a 5000 W load is beyond the first one's limit, not the second's.
- 1.843 kWh → 6.144 kWh: at the same load the second lasts more than three times as long.
- 1200 W → 4000 W solar input: the second accepts more than three times the panels.
- 53 dB → 30 dB: the second is far less audible indoors.
Which one to choose
Choose BLUETTI AC240P if…
you work where dust and water are a risk and your loads stay within 2400 W: IP65 protection, a 6-year warranty and 45 minutes to reach 80% charge. The trade-off: capacity that expands only to 10.443 kWh and a declared 53 dB, which is audible.
Choose EcoFlow DELTA Pro Ultra if…
you need to run several large appliances together, with five mains outlets and panels up to 4000 W: a declared 30 dB, heated cells and a battery expandable to 30 kWh. The trade-off: IP54 instead of IP65 and a 5-year warranty, one year less.
Where to buy
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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.