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Prolonged power outages and the absence of predictable schedules make it difficult to plan and fully recharge portable power stations in a timely manner. As a result, the need for backup power for household use continues to increase. EcoFlow offers a functional solution for replenishing energy reserves without access to the grid: the Alternator Charger, which enables charging energy storage devices while traveling in a vehicle.
The Alternator Charger converts a vehicle into a mobile power source. The device connects directly to the car battery and utilizes excess energy generated during operation, regulating voltage and current before delivering it to the charging station.

The Alternator Charger has a power output of 800 W. This capacity allows it to charge a portable power station up to eight times faster than a 100 W car cigarette lighter.
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How long does it take to charge the station with the Alternator Charger?
Over a period of 1.3 hours, the Alternator Charger can provide up to 1 kWh of energy, depending on the load and the type of power station. To estimate the charging time for a station, divide the station’s capacity by the charger’s output power of 800 W.
Accordingly, common EcoFlow power stations can be charged using the Alternator Charger as follows:
- DELTA 2, DELTA 3, DELTA 3 Plus with a capacity of 1024 Wh – up to 1.3 hours
- DELTA 3 1500 with a capacity of 1536 Wh – up to 1.9 hours
- DELTA 2 Max, DELTA 3 Max Plus with a capacity of 2048 Wh – up to 2.6 hours
- DELTA Pro with a capacity of 3600 Wh – up to 4.5 hours.
Note: Charging times may vary depending on the load. For example, operating a heater or other devices in the vehicle adds extra demand, which can reduce the effective output of the battery when used with the Alternator Charger.
This practical video case demonstrates how to connect the Alternator Charger to a car battery and a power station, as well as the actual charging time of the EcoFlow DELTA 3 1500 during a commute.
Additional Use Cases for the Alternator Charger
The Alternator Charger can operate continuously with a power station, allowing devices that require constant power to be connected. For instance, a portable refrigerator can be powered during a long trip. In this way, food remains preserved while the station’s charge is automatically replenished throughout the journey.
Additionally, the Alternator Charger can operate in reverse. Using the configuration “DELTA series power station → Alternator Charger → car battery,” it is possible to charge the vehicle’s battery when needed by drawing stored energy from the power station.

The Alternator Charger is compact, measuring 242 × 194 × 35 mm and weighing 2.3 kg, so it does not take up much space in a vehicle. It can be easily installed and configured using EcoFlow’s mobile app, Power a New World.
The EcoFlow Alternator Charger for vehicles is available for order through the official website at the following link.
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