Photo from the manufacturer
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EcoFlow DELTA 3 1500 is a lithium iron phosphate power station with an expansion port that also takes the batteries of DELTA 2, DELTA 2 Max and DELTA Pro 3. The outlets and ports are enough on their own to cover most of a home's appliances, without adding a power strip. In a blackout, switchover to the battery takes fifteen milliseconds.
It charges from the outlet, the sun or the car; on mains power alone it's back to nearly full in about an hour, useful if the blackout finds it already empty. The expansion battery greatly extends the runtime, but the power on the outlets stays the same with or without it: it grows in how long it lasts, not in how much it can drive.
It's built for anyone who needs more energy than a compact unit but doesn't yet want a fixed home battery system: roomy enough for several days off grid, and still something moved in two hands. Anyone loading it into the car alone every week will feel the weight.
official manufacturer list price — on nominal capacity
| Parameter | Value | Source |
|---|---|---|
| Dimensions | 21.3 × 39.8 × 28.2 cm (8.4 × 15.7 × 11.1 in) | manufacturer website |
| Nominal capacity | 1.536 kWh | Declared by the brand |
| Cell chemistry | LFP (lithium iron phosphate) | Declared by the brand |
| Expandable | Yes | Declared by the brand |
| Maximum expanded capacity | 5.5 kWh | Declared by the brand |
| Continuous output | 1800 W | Declared by the brand |
| Peak output | 3600 W | Declared by the brand |
| AC outlets | 4 | Declared by the brand |
| Fastest USB-C | 100 W | Declared by the brand |
| Maximum charge power | 1.5 kW | Declared by the brand |
| 0–80% charge time | 60 min | Declared by the brand |
| Maximum solar input | 500 W | Declared by the brand |
| Backup power | UPS | Declared by the brand |
| Switchover time | 15 ms | Declared by the brand |
| Rated cycles | 3000 cicli | Declared by the brand |
| Capacity at end of cycle life | 70 % | Declared by the brand |
| Warranty | 5 anni | Declared by the brand |
| Ingress protection | IP54 | Declared by the brand |
| Mounting | Portable | Declared by the brand |
| Noise level | 45 dB | Declared by the brand |
| Official list price | 1299 € | Declared by the brand |
| Usable capacity | — | Not declared |
| Depth of discharge | — | Not declared |
| Cell supplier | — | Not declared |
| Peak duration | — | Not declared |
| Guaranteed throughput | — | Not declared |
| Guaranteed remaining capacity | — | Not declared |
| Round-trip efficiency | — | Not declared |
| Standby consumption | — | Not declared |
| Minimum temperature | — | Not declared |
| Maximum temperature | — | Not declared |
| Cell heating | — | Not declared |
| Wheels and handle | — | Not declared |
| Works without internet | — | Not declared |
| Local control | — | Not declared |
| Open protocols | — | Not declared |
| Home Assistant integration | — | Not declared |
| Where the data is hosted | — | Not declared |
| Remote updates | — | Not declared |
| App required for setup | — | Not declared |
| Declared standards | — | Not declared |
The rest of the data comes from one page on the manufacturer's site, cited row by row in the table above.
A manual or a datasheet counts as a source even when the original file is hosted elsewhere: what matters is the document, not the server. Where that happens, it is stated above.
These numbers are calculated, not stated: they have no source to cite, they have a formula you can redo. The price used is the manufacturer's list price, which is stable and the same in every country — not a shop's price on the day.
Chosen by the declared use tier and footprint, not by price: we don't publish prices.
