Portable Power Stations · EcoFlow
EcoFlow DELTA Pro 3 Portable Power Station (4096Wh)
- 4,096 WhCapacity
- LiFePO4Battery chemistry
- 4,000 WAC continuous output
- 6,000 WAC surge
- 115 lbWeight
- 5 yrWarranty
A 4 kWh, 120/240 V power station that can expand to 48 kWh. On a rig it is a fixed house battery, not something you carry to camp.
Ideal for: Van builds and long-stay rigs that need a real house battery.
Where it sits
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Full specifications
| Battery | |
|---|---|
| Capacity | 4,096 Wh |
| Battery chemistry | LiFePO4 |
| Cycle life (to 80%) | — |
| Expandable battery | Yes |
| Output | |
| AC continuous output | 4,000 W |
| AC surge | 6,000 W |
| AC outlets | — |
| Max USB-C port | — |
| 12V car-socket output | — |
| Charging | |
| Max solar input | — |
| Wall charge time (0-100%) | — |
| Car (12V) charging | — |
| UPS / pass-through | Yes |
| Body | |
| Weight | 115 lb |
| Warranty | 5 yr |
Other details
- Expansion (listing)
- up to 48 kWh with extra batteries or smart generators
- Voltage
- 120 V / 240 V
- UPS switchover
- 10 ms
- Battery pack
- IP65-rated
- Model
- EFD521
7 of 15 fields not yet confirmed (shown as “—”). Sourced only from the Amazon listing and the manufacturer's official page (see Data sources). Product images are illustrations, not product photos.
The DELTA Pro 3 is EcoFlow's whole-home unit: 4096 Wh of LFP cells, 4000 W output (6000 W with X-Boost), 120 V and 240 V, and expansion to 48 kWh. It weighs 115 lb, so in a vehicle it lives on a slide or in a fixed mount.
For most car campers this is overkill. It makes sense in a van or a long-stay rig that runs induction cooking, an AC unit or power tools.
Pictures on this page are illustrations, not product photos. Open the Amazon listing for real photos, today's price and buyer reviews.
Pros
- 4 kWh, expandable to 48 kWh
- 4000 W output, 120/240 V
- 5-year warranty
Cons
- 115 lb: needs a fixed mount
- More power than most car campers need
What buyers say
We don't summarize or score buyer reviews here. Read them on the Amazon listing.
Data sources
- amazon Amazon listing (B0D14FMFZD) · accessed 2026-11-03
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