Nomad Gear Finder My Saved Products 0
EF ECOFLOW DELTA Pro 3 (EFD521)

EF ECOFLOW DELTA Pro 3 (EFD521)

EF ECOFLOW DELTA Pro 3 Portable Power Station, 4096Wh, 4000W AC Output | LFP Battery, Expandable to 48kWh, 120/240V, Solar Generator for Home Use, Camping Accessories, Emergencies, Power Outages, RV

In Stock

Price
$2,799.00
View on Amazon

Prices from Amazon as of . Product prices and availability are accurate as of the date and time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply to the purchase of the product. As an Amazon Associate I earn from qualifying purchases.

Ranking within Category

Comparing this product to others on Nomad Gear Finder (in the portable power stations category with a value specified):

  • This product's Battery capacity is higher than 98% of 138 others: 4,096 Wh
  • This product's Output wattage is higher than 95% of 137 others: 4,000 W
  • This product's Peak wattage is higher than 96% of 109 others: 8,000 W
  • This product's AC outlets count is higher than 98% of 123 others: 7
  • This product's Weight is higher than 97% of 137 others: 113.54 lbs (51.50 kg)
  • This product's Depth/Height is the highest of 139: 27.28 in. (693 mm)

Compare this product with close matches

Specifications

These details are subject to change and may not be current. Please check Amazon or manufacturer web site to confirm before purchase.

Model
DELTA Pro 3 (EFD521)
Manufacturer page
Link
User manual
Link
Popular brand
Yes

Core specs

Battery capacity
4,096 Wh
Battery capacity
80 Ah
Output wattage
4,000 W
Peak wattage
8,000 W
Pass-through charging
Yes
Cycle lifespan
4,000 Cycles to 80% Original Capacity
Max expanded capacity
12,000 Wh
Battery chemistry
LiFePO4

Internals

Inverter type
Pure Sine Wave
UPS switchover
10 ms
Voltage
120 V
Frequency
60 Hz
Noise level
30 dB
App connectivity
Wi-Fi and Bluetooth

Outlets

AC outlets count
7
AC outlets description
4 x 120V/20A NEMA 5-20R, 1 x 120V/30A NEMA TT-30R, 1 x 240V/16.7A NEMA 6-20R, 1 x 120/240V/16.7A NEMA L14-30R, 4,000W In Total, 8,000W Surge, 60Hz
USB-A ports count
2
USB-A ports description
2 x 18W (Each Port), 5V/2.4A, 9V/2A, 12V/1.5A, 36W in total
USB-C ports count
2
USB-C ports description
2 x 100W Max. (200W in total)
12V DC outlets count
2
12V DC outlets description
1 x DC5521 Port 12.6V/5A, 1 x 12.6V/30A Anderson Port, 378W Max. Shared
240V output
Yes
RV TT-30 outlet
Yes

Charging

AC charging input
15A Max., 100-240V, 50/60Hz (Charge Only); Bypass Mode: 100-120V, 15A (3 Hours Max.), 12A Continuous
AC charging time
80% in ≈50 min
Solar inputs count
2
Solar charging input
2,600W Max. (High-PV: 1,600W Max., 30V-150V, 15A Max.; Low-PV: 1,000W Max., 11V-60V, 20A Max.)
Solar input voltage
30 to 150V DC (High-PV), 11 to 60V DC (Low-PV)
Solar panel connector
XT60 (High-PV), XT60i (Low-PV)
Car charging input
12V/8A Max., 48V/20A Max. (XT60i port)
Alternator charging
Yes

Temperature Range

Charging temp min
32 ℉
Charging temp max
113 ℉
Charging temp min
0 ℃
Charging temp max
45 ℃
Discharging temp min
14 ℉
Discharging temp max
113 ℉
Discharging temp min
-10 ℃
Discharging temp max
45 ℃
Storage temp min
14 ℉
Storage temp max
113 ℉
Storage temp min
-10 ℃
Storage temp max
45 ℃

Physical Attributes

Weight
113.54 lbs
Weight
51.50 kg
Length
16.16 in.
Length
410 mm
Width
13.43 in.
Width
341 mm
Depth/Height
27.28 in.
Depth/Height
693 mm
Built-in wheels
Yes
IP rating
IP20

Certifications

Certifications summary
UL 9540, FCC Part 15 Class A and ISED/IC (ICES-003 Class A) statements, CE, RoHS
FCC Part 15 compliant
Yes

More specifications

Warranty
5 Years

Features

Details from the EF ECOFLOW DELTA Pro 3 (EFD521) Amazon listing:

  • Energize Almost Everything. The EcoFlow DELTA Pro 3 supports 120V/240V voltage and has a 4000W output (6000W with X-Boost, scalable up to 12000W), powering nearly all essential home appliances, such as a 3-ton* central AC or a 1 HP water pump.
  • Forget Refueling. Featuring a 4096Wh LFP battery capacity, expandable to 48kWh with extra batteries or smart generators, providing 2-4 days of whole-home backup power. With 7 unique and 18 combo charging methods like AC wall outlets, solar panels, gas generators, EV charging piles, or the EcoFlow smart home panel 2, you can forget fuel worries.
  • Plug and Play. Experience hassle-free power with the DELTA Pro 3, a versatile portable power station that's easy to set up, even a kid can manage it. No installation or maintenance required. Its portable handle design makes this solar generator perfect for clean, renewable energy anywhere, anytime. Control and monitor your power with the EcoFlow app, even remotely.
  • Silent as a Whisper. With X-Quiet technology, this solar generator operates at a peaceful hum as low as 30 dB, ensuring undisturbed sleep even beside your bed. Its whisper-quiet operation is so discreet, you'll hardly notice it's there, making it perfect for both indoor and outdoor use.
  • Uninterrupted Life. With the ultra-fast 10 ms switch-over capability of the EcoFlow DELTA Pro 3, enjoy instant backup for your NAS systems, servers, and entertainment devices. Safeguard against power disruptions and ensure continuous, safe operation. This portable power station is your reliable partner for an uninterrupted life.
  • Explore the Secure Feeling. The EcoFlow DELTA Pro 3 features automotive-grade LFP cells and IP65-rated CTC battery pack technology, safeguarding battery health and extending lifespan. Enjoy peace of mind with a 5-year warranty and exceptional customer service, available anytime for any issues.

Similar products from other brands

Chosen for their similar specs and price:

Similar products from other brands
This productEF ECOFLOW DELTA Pro 3 (EFD521) Jackery HomePower 3600 Plus pecron F5000LFP Dabbsson DBS3500
Price $2,799.00 $1,709.00 – $2,558.55
Model DELTA Pro 3 (EFD521) HomePower 3600 Plus F5000LFP DBS3500
Popular brand Yes Yes No No
Battery capacity (Wh) 4,096 3,584 5,120 3,430
Battery capacity (Ah) 80 80 100 67
Output wattage (W) 4,000 3,600 7,200 3,600
Peak wattage (W) 8,000 7,200 – 7,200
Pass-through charging Yes Yes Yes Yes
Cycle lifespan 4,000 Cycles to 80% Original Capacity 6,000+ Cycles to 70% Original Capacity 4,000+ Cycles to 80% Original Capacity 4,500 Cycles to 80% Original Capacity
Max expanded capacity (Wh) 12,000 21,504 35,840 14,070
Battery chemistry LiFePO4 LiFePO4 LiFePO4 LiFePO4
Solar charge controller – – MPPT MPPT
Inverter type Pure Sine Wave Pure Sine Wave – Pure Sine Wave
UPS switchover (ms) 10 10 0 15
Voltage (V) 120 120 120 120
Frequency (Hz) 60 60 60 60
Noise level (dB) 30 30 30 –
App connectivity Wi-Fi and Bluetooth Wi-Fi and Bluetooth Wi-Fi and Bluetooth Wi-Fi and Bluetooth
AC outlets count 7 5 6 5
AC outlets description 4 x 120V/20A NEMA 5-20R, 1 x 120V/30A NEMA TT-30R, 1 x 240V/16.7A NEMA 6-20R, 1 x 120/240V/16.7A NEMA L14-30R, 4,000W In Total, 8,000W Surge, 60Hz 4 x 120V/20A, 1 x 120V/30A NEMA TT-30, 3,600W In Total 4 x 120V/20A NEMA 5-20R, 1 x 120V/30A NEMA TT-30, 3,600W In Total, 1 x 240V NEMA L14-30, 7,200W Max., 50/60Hz 4 x 120V, 1 x 120V/30A NEMA TT-30, 3,600W In Total, 7,200W Surge, 60Hz
USB-A ports count 2 2 2 3
USB-A ports description 2 x 18W (Each Port), 5V/2.4A, 9V/2A, 12V/1.5A, 36W in total 2 ×18W (Each Port) 2 x 18W (Each Port) 2 x 18W Max., 1 x 12W Max., 5V/2.4A
USB-C ports count 2 2 2 3
USB-C ports description 2 x 100W Max. (200W in total) 2 ×100W Max. 2 x 100W Max. 2 x 100W Max., 1 x 30W Max.
12V DC outlets count 2 0 2 4
12V DC outlets description 1 x DC5521 Port 12.6V/5A, 1 x 12.6V/30A Anderson Port, 378W Max. Shared – 1 x XT60, 1 x DC5525, 12-40V Adjustable, 25A Max., 800W Max. 1 x 12.6V/10A (Car Outlet), 126W Max., 2 x DC5521 Port 12.6V/4A, 50.4W Max. (Each Port), 1 x 12.6V/30A Anderson Port, 378W Max.
48V DC outlets count – 0 – –
240V output Yes Yes Yes Yes
RV TT-30 outlet Yes Yes Yes Yes
Max charging input (W) – – 5,800 3,400
AC charging input 15A Max., 100-240V, 50/60Hz (Charge Only); Bypass Mode: 100-120V, 15A (3 Hours Max.), 12A Continuous 15A Max., 100-120V 3,600W Max., 30A, 100-120V (1,800W with 15A cable) 1,800W Max. (600W Default, Adjustable in App), 120V, 15A
AC charging time 80% in ≈50 min ≈2.5 Hours (AC), ≈2 Hours (AC + DC) ≈1.8 Hours (3,600W) ≈2 Hours
Solar inputs count 2 2 2 1
Solar charging input 2,600W Max. (High-PV: 1,600W Max., 30V-150V, 15A Max.; Low-PV: 1,000W Max., 11V-60V, 20A Max.) 1,000W Max., 16V-60V, 24A Max. 3,200W Max. per port, 5,800W total (6,400W with expansion battery), 30V-180V, 25A Max. 2,400W Max., 12V-150V, 25A Max.
Solar input voltage 30 to 150V DC (High-PV), 11 to 60V DC (Low-PV) 16 to 60V DC 30 to 180V DC 12 to 150V DC
Solar charging time – ≈4 Hours ≈1.2 Hours (5,800W) ≈1.9 Hours (2,400W)
Solar panel connector XT60 (High-PV), XT60i (Low-PV) DC8020 XT60 (MC4 to XT60 solar charging cable included) XT60 (MC4 to XT60 solar charging cable included)
Car charging input 12V/8A Max., 48V/20A Max. (XT60i port) 12V, 8A Max. from Cigarette Lighter Port – 12/24V, 8A Default from Cigarette Lighter Port
Alternator charging Yes – – –
Charging temp min (℉) 32 -4 -4 32
Charging temp max (℉) 113 113 113 113
Charging temp min (℃) 0 -20 -20 0
Charging temp max (℃) 45 45 45 45
Discharging temp min (℉) 14 -4 14 32
Discharging temp max (℉) 113 113 113 104
Discharging temp min (℃) -10 -20 -10 0
Discharging temp max (℃) 45 45 45 40
Storage temp min (℉) 14 -4 32 14
Storage temp max (℉) 113 113 113 113
Storage temp min (℃) -10 -20 0 -10
Storage temp max (℃) 45 45 45 45
Weight (lbs) 113.54 77.00 123.90 90.50
Weight (kg) 51.50 35.00 56.20 41.00
Length (in.) 16.16 15.20 21.70 20.90
Length (mm) 410 385 551 533
Width (in.) 13.43 12.20 15.00 12.00
Width (mm) 341 309 381 305
Depth/Height (in.) 27.28 19.30 13.10 15.40
Depth/Height (mm) 693 491 332 393
Built-in wheels Yes Yes Yes Yes
IP rating IP20 – – –
Certifications summary UL 9540, FCC Part 15 Class A and ISED/IC (ICES-003 Class A) statements, CE, RoHS FCC Part 15 Class B statement – ETL, FCC, PSE, WEEE, RoHS, TELEC
FCC Part 15 compliant Yes Yes – Yes
NRTL safety listed (UL/ETL/CSA) – – – Yes
Warranty 5 Years 3 Years, +2 Years with Registration 3+2 Years 5 Years

Data sources

Data for this product compiled from these sources:

Specifications last updated Oct 12, 2026.