Product images: EcoFlow official store
EcoFlow · Power station + extra battery
EcoFlow DELTA Pro 3 + Extra Battery
The DELTA Pro 3 with double the battery
WattLab Score
How good it is for its size · method
- 8,192 WhCapacity
- 4,000 W / 8,000 WAC continuous / surge
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Overview
This bundle pairs the DELTA Pro 3 (4,000W at 120V and 240V, 10 ms UPS) with a Smart Extra Battery for 8,192Wh of LiFePO4, enough for multi-day essentials backup, with solar input up to 2,600W.
Ideal for
Homes that need several days of essentials backup or 240V loads, and want solar-ready capacity without a permanent install.
Skip it if
Short outages or apartments; a single 2–4kWh unit costs far less.
Editor's ratings · 0–10
Score profile
Seven axes on fixed scales, so scores compare directly across every model on WattLab Review.
What's inside the 8.2 WattLab Score
- Charging speed—
- Battery technology10.0
- Energy density (Wh/lb)—
- Solar refill speed5.0
- Value (Wh per $)7.6
- Versatility (ports & features)10.0
How long will it run?
Estimated runtimes on a full charge for common devices.
| Device | Typical load | Estimated runtime |
|---|---|---|
| Smartphone charge | 15 Wh each | ~464 charges |
| Wi-Fi router + modem | 15 W | ~464 hr |
| CPAP (no humidifier) | 40 W | ~174 hr |
| Laptop | 60 W | ~116 hr |
| 12V camping fridge (avg) | 35 W | ~199 hr |
| 32" LED TV | 50 W | ~139 hr |
| Full-size fridge (avg) | 150 W | ~46 hr |
| Coffee maker | 1,000 W | ~7.0 hr |
Estimates use 85% of rated capacity to account for inverter losses. Real runtimes vary with temperature, battery age and how often appliances cycle.
Full specifications
Battery
| Capacity | 8,192 Wh |
|---|---|
| Battery chemistry | LiFePO4 |
| Rated cycle life | 4,000 cycles |
Output
| AC output (continuous) | 4,000 W |
|---|---|
| Surge / peak | 8,000 W |
| Power Lifting (resistive loads) | — |
| AC outlets (120V, pure sine) | 7 |
| USB-C ports | 2 |
| Max USB-C output | 100 W |
| USB-A ports | 2 |
| 12V car outlet | — |
| DC5521 barrel ports | 1 |
Charging
| Max AC charging input | 1,800 W |
|---|---|
| AC charge time (standard) | — |
| Fastest full charge | — |
| Max solar input | 2,600 W |
| Solar input spec | 2 ports: high-voltage 30–150V (1,600W max) + low-voltage 11–60V (1,000W max) |
| Solar charge time | — |
| Car charge time | — |
Size & build
| Weight | — |
|---|---|
| Dimensions | Main unit 16.2 × 13.4 × 27.3 in, plus extra battery |
| Rated noise | ≤30 dB |
| Charging temperature | 32–113°F (0–45°C) |
| Discharge temperature | 14–113°F (-10–45°C) |
Smart features & warranty
| UPS switchover | ≤10 ms |
|---|---|
| App control | EcoFlow app (Wi-Fi + Bluetooth) |
| Expandable battery | Yes |
| Warranty | 5 years |
Value
| Reference price* | $4,698.00 |
|---|---|
| Wh per dollar* | 1.74 Wh/$ |
Other details
| Bundle | DELTA Pro 3 (4,096Wh) + DELTA Pro 3 Smart Extra Battery (4,096Wh) |
|---|---|
| Weight | Main unit 113.5 lb; EcoFlow doesn't list the extra battery's weight on the bundle page |
| Voltage | 120V and 240V output |
| AC outlets detail | 4 × NEMA 5-20R, 1 × TT-30R, 1 × NEMA 6-20R, 1 × L14-30R |
| Expansion | Add one more extra battery for 12kWh per unit; up to 48kWh in a 3-unit system |
- Fast charging: EcoFlow quotes 0–80% in about 50 minutes for the DELTA Pro 3 with its fastest charging setup; with the extra battery attached, there's twice as much to refill.
- Solar time: EcoFlow solar panels sold separately.
- Cycle life: 4,000 cycles to 80% capacity at 0.5C, 25°C (EcoFlow rating).
- * Reference price from the manufacturer's US store on the date shown. Amazon's price may be different.
- — means the manufacturer doesn't publish that figure. We never estimate missing specs.
EcoFlow DELTA Pro 3 + Extra Battery
See today's price and availability on Amazon.com
Our take
This is the DELTA Pro 3 we review separately, bundled with one DELTA Pro 3 Smart Extra Battery. Doubling the capacity to 8,192Wh changes what it can do in an outage: a typical refrigerator, internet, lights and phones can run for several days, and there's enough energy to use 240V loads such as a well pump or a small central AC for meaningful stretches.
Everything else carries over from the main unit: a 4,000W inverter at 120V and 240V (8,000W surge, 6,000W X-Boost), seven AC outlets including TT-30R and L14-30R, a 10 ms UPS switchover, and two solar inputs that together take up to 2,600W. The LiFePO4 cells are rated for 4,000 cycles to 80%.
The main limitation of the bundle is recharging. A standard 120V outlet tops out at 1,800W, which is slow for 8kWh; a 240V outlet, solar or EcoFlow's Smart Generator make far more sense. You can add a second extra battery for 12kWh per unit, or build a three-unit system up to 48kWh.
If you already know a single DELTA Pro 3 won't last long enough, the bundle is the simplest way to get there in one purchase.
Pros
- 8,192Wh LiFePO4, enough for multi-day essentials backup
- 4,000W at both 120V and 240V, 8,000W surge
- 10 ms UPS switchover
- 2,600W solar input
- Can grow to 12kWh per unit or 48kWh in a system
Cons
- Slow to refill from a 120V outlet (1,800W)
- Heavy: the main unit alone is 113.5 lb
- Costly compared with standalone units
- No 12V cigarette-lighter socket
What owners and reviewers say
Independent reviews
The DELTA Pro 3 main unit has been reviewed by TechRadar, Digital Trends, Bob Vila and RV.com, and CleanTechnica published a long-term review after months of use. We haven't found a review of this exact bundle. We'll add Amazon buyer feedback themes once we can verify them.
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BLUETTI
BLUETTI Elite 30 V2
The pocket-sized LiFePO4 pick with a real 600W inverter
- 288 WhCapacity
- 600 WAC output
- LiFePO4Battery
- 9.48 lbWeight
$289.99reference price*
Jackery
Jackery Explorer 1000 v2
The 1kWh sweet spot for home backup that still fits in a car trunk
- 1,070 WhCapacity
- 1,500 WAC output
- LiFePO4Battery
- 23.8 lbWeight
$559.00reference price*
Jackery
Jackery Explorer 300
The proven ultralight for cameras, drones and weekend camping
- 293 WhCapacity
- 300 WAC output
- Li-ion (NMC)Battery
- 7.1 lbWeight
$289.00reference price*
Ready to decide?
EcoFlow DELTA Pro 3 + Extra Battery on Amazon.com