EcoFlow 500W Alternator Charger

Name: EcoFlow 500W Alternator Charger
Brand: EcoFlow
Price: 199 USD
Availability: InStock

Charges the DELTA 3 Classic, DELTA 3 Max, DELTA 3 Plus, DELTA 3, RIVER 2 Pro and RIVER 3 Plus from a running vehicle at up to 500 W (12V/24V vehicle battery). $199 at EcoFlow, checked Oct 14, 2026.

Charging power

500W

RIVER 3 Plus from empty

1.3 hdriving

DELTA 3 Max from empty

4.1 hdriving

Rated Wh ÷ the watts it delivers to that station (500 W, or the station's solar input limit, which it charges through), at full power the whole way: an ideal lower bound. Charging losses and the slowdown near full make it longer, and the engine has to be running.

From EcoFlow's published figures and our own arithmetic; we have not tested it ourselves.

See it at EcoFlow Accessories for every station

Which stations it charges

EcoFlow 500W Alternator Charger on each station
Station	Capacity	Charging at	From empty, driving
EcoFlow DELTA 3 Classic	1,024 Wh	500 W	2 h
EcoFlow DELTA 3 Max	2,048 Wh	500 W	4.1 h
EcoFlow DELTA 3 Plus	1,024 Wh	500 W	2 h
EcoFlow DELTA 3	1,024 Wh	500 W	2 h
EcoFlow RIVER 2 Pro	768 Wh	220 W	3.5 h
EcoFlow RIVER 3 Plus	286 Wh	220 W	1.3 h

Installing it

EcoFlow: "We recommend that the wiring process be completed by a professional."

Follow EcoFlow's instructions for the cable, the fuse and where it connects; ask an installer if your vehicle's wiring is unfamiliar.

Specs

EcoFlow 500W Alternator Charger: EcoFlow's figures
Charging power	500 W
Vehicle battery	12V/24V
Weight	3.5 lb (1.6 kg)
In the box, in the maker's words	"The 500W Alternator Charger comes with an XT60 cable, but does not support reverse charging & battery maintenance functions with the XT60 cable."

Where these figures come from

EcoFlow product page: "Output: 40V-60V⎓, 500W Max.;24V⎓, 360W Max." · "Input: 12V/24V⎓(11V-31V⎓), 45A Max."
On the DELTA 3 Classic: EcoFlow's page, "Charge to 80% in 1.8 hours or 100% in 2.5 hours using the EcoFlow 500W Alternator Charger."
On the DELTA 3 Max: EcoFlow's page, "With the EcoFlow 500W Alternator Charger[7], get ready fast while on the move."
On the DELTA 3 Plus: EcoFlow's page, "DELTA 3 Plus (1kWh) - 2.1 hr"
On the DELTA 3: EcoFlow's page, "DELTA 3 (1kWh) - 2.1 hr"
On the RIVER 2 Pro: EcoFlow's page, "RIVER 2 Pro - 3.6 hr"
On the RIVER 3 Plus: EcoFlow's page, "RIVER 3 Plus + 500W Alternator Charger"
Through the station's solar input: EcoFlow's page, "The 500W Alternator Charger comes with an XT60 cable, but does not support reverse charging & battery maintenance functions with the XT60 cable."
Price and stock: EcoFlow's US store, checked Oct 14, 2026.