EcoFlow 800W Alternator Charger

Name: EcoFlow 800W Alternator Charger
Brand: EcoFlow
Price: 269 USD
Availability: InStock

Charges the DELTA 3 Max Plus, DELTA 3 Ultra Plus, DELTA Pro, DELTA Pro 3, DELTA 2 Max, DELTA 3 Plus and DELTA 3 from a running vehicle at up to 800 W (12V/24V vehicle battery). $269 at EcoFlow, checked Oct 14, 2026.

Charging power

800W

DELTA 3 Plus from empty

1.3 hdriving

DELTA Pro 3 from empty

5.1 hdriving

Rated Wh ÷ the watts it delivers to that station (800 W), 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 800W Alternator Charger on each station
Station	Capacity	Charging at	From empty, driving
EcoFlow DELTA 3 Max Plus	2,048 Wh	800 W	2.6 h
EcoFlow DELTA 3 Ultra Plus	3,072 Wh	800 W	3.8 h
EcoFlow DELTA Pro	3,600 Wh	800 W	4.5 h
EcoFlow DELTA Pro 3	4,096 Wh	800 W	5.1 h
EcoFlow DELTA 2 Max	2,048 Wh	800 W	2.6 h
EcoFlow DELTA 3 Plus	1,024 Wh	800 W	1.3 h
EcoFlow DELTA 3	1,024 Wh	800 W	1.3 h

Installing it

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

EcoFlow also says: "Recharge your vehicle starter battery or RV house battery using your portable power station."

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 800W Alternator Charger: EcoFlow's figures
Charging power	800 W
Vehicle battery	12V/24V
Weight	not published
In the box, in the maker's words	"The 800W Alternator Charger comes with an XT150 cable to pair with EcoFlow DELTA Series products."

Where these figures come from

EcoFlow product page: "Output: 40V-60V, 800W Max." · "any vehicle with a starter battery operating on a 12V or 24V voltage can use this product"
On the DELTA 3 Max Plus: EcoFlow's page, "DELTA 3 Max Plus works with: DELTA 3 Max Plus Smart Extra Battery, DELTA Pro 3 Smart Extra Battery, DELTA 3 Smart Extra Battery, EcoFlow 800W Alternator Charger, EcoFlow Alternator Charger 600, EcoFlow Alternator Charger Plus 1000."
On the DELTA 3 Ultra Plus: EcoFlow's page, "DELTA 3 Max Plus, DELTA 3 Ultra Plus, DELTA Pro, and DELTA Pro 3 require the EcoFlow Alternator Charger Custom Fit Output Cable (2m). Compatible with EcoFlow DELTA Series products only."
On the DELTA Pro: EcoFlow's page, "DELTA Pro (3.6kWh) - 4.8 hr"
On the DELTA Pro 3: EcoFlow's page, "1. EcoFlow 800W Alternator Charger"
On the DELTA 2 Max: EcoFlow's page, "DELTA 2 Max (2kWh) - 2.6 hr"
On the DELTA 3 Plus: EcoFlow's page, "DELTA 3 Plus + 800W Alternator Charger"
On the DELTA 3: EcoFlow's page, "EcoFlow DELTA 3 + 800W Alternator Charger"
Price and stock: EcoFlow's US store, checked Oct 14, 2026.