Top up 1kWh (85Ah@12V) in only 2.1 hours
Charge 5× faster while you drive with our EcoFlow 500W Alternator Charger and recharge your power station in only 2.1 hours.With the EcoFlow 500W Alternator Charger, charge 5 times faster than with traditional vehicle auxiliary power outlets simply by using excess energy generated by your vehicle. The charger uses its onboard DC-DC converter to restore your EcoFlow power station's energy while you drive.
Triple the value with a 3-in-1 functional design
The 3-in-1 charger, maintainer, and jump starter saves time, money, and precious in-vehicle space.
With its smart and efficient fast charging capabilities, you'll stay powered no matter how long you're on the road.
* The 500W Alternator Charger comes with an XT60 cable, but does not support reverse charging & battery maintenance functions with the XT60 cable. To enable reverse charging & battery maintenance functions, purchase the XT150 cable and use with an EcoFlow DELTA Series product.
Reverse Charging Mode
Compatible with all EcoFlow and most third-party power stations
Compatible with an XT60 connection, designed to charge EcoFlow RIVER, DELTA Series, and most third-party power stations. The charger's 500W fast-charging is compatible with most SUV, Pickup, and RV alternators, meeting diverse short-trip car camping power needs.
Traditional vs. EcoFlow Portable Dual Battery Systems
How to Choose your EcoFlow Alternator Charger
More Detailed Specifications
for 500W & 800W Alternator Charger
Extend your 4WD battery runtime
Conveniently adapts to 12V/24V 4WD batteries. Connects to EcoFlow portable power stations and protects 4WD batteries while expanding energy storage capacity by up to 7.2kWh*.* With EcoFlow DELTA 3 Pro and DELTA 3 Pro Extra Battery.
Clean, easy install without leaving a mark
Connect your 500W Alternator Charger to your vehicle's starter battery or RV's house battery to enjoy a worry-free power experience during your journey.
Safety-assured for any journey
With a high thermal resistance, Gallium Nitride (GaN) technology ensures safe charging every single time. The 500W Alternator Charger offers multiple safety features, including undervoltage protection that prevents excessive energy use and damage to the starting battery. A 2-year warranty ensures your experience and peace of mind.
Clean, easy install without leaving a mark
What's in the box
Specs
Model
EF-MS-H02-1
Net Weight
5.7 kg
Dimensions (W × D × H)
242×194×35 mm
Wi-Fi
Frequency: 2412MHz-2472MHz
Maximum output power: 18.22dBm
Bluetooth
Frequency: 2402MHz-2480MHz
Maximum output power: 7.89dBm
Charging Mode
Input: 12V/24V⎓(11V-31V⎓), 45A Max.
Output: 40V-60V⎓, 500W Max.;24V⎓, 360W Max.
Battery Maintenance Mode
Input: 40V-60V⎓, 3A Max.
Output: 13.8V/27.6V⎓, 100W Max.
Reverse Charging Mode
Input: 40V-60V⎓, 13.2A Max.
Output: 13.8V/27.6V⎓, 500W Max.
Fuse's Rated Current
125A
Protection Type
Reverse polarity protection / Overcurrent protection / Short circuit protection / Overvoltage and undervoltage protection (Provided with integral protection against overloads)
FAQ
Yes, the Alternator Charger can charge third-party portable power stations if the following conditions are met:1. Connected via an XT60 cable.2. The battery type is correctly configured in the settings.3. The vehicle battery voltage (12V/24V) is selected based on the actual voltage level.4. The portable power station type is set to third-party 24V battery.
- Output is capped at 500W when using an XT60 cable, even for the 800W Alternator Charger.
- If the portable power station is set to 48V, max output is 500W. For 24V, it drops to 360W.
- Actual power depends on the station’s input capability. The 500W/800W/360W ratings refer to charger output, not the station’s input.
Cable length settings compensate for voltage drop, ensuring accurate voltage readings.Recommendation: Set based on actual measured length of the input cable.
The Alternator Charger uses a boost circuit design, requiring the input voltage to be lower than the output voltage for safe, optimal performance.
Very minimally. The product uses the power generated by the vehicle's alternator. Even if all the electrical devices inside the car are turned off, the alternator still generates power while the vehicle is running. The Alternator Charger harnesses the surplus power generated by the car's alternator and stores it in a portable power station through the charger. The impact on fuel consumption is very minimal.
No drilling is needed. Wiring routes through the firewall near the driver'’s seat. Installation is safe and will not cause damage.
Yes, for users with hands-on experience. However, it is still recommended to contact professional personnel from related workshops for installation.Tip: Avoid hot, sharp, or high-friction areas. Secure all cables and never cover the unit. It may get hot, so avoid direct contact immediately after use.
It delivers up to 500W of power—5× more than the average 100W from a cigarette lighter—allowing faster, more efficient charging while driving.
It works best with fuel-powered, hybrid, and range-extended vehicles.Charging power depends on alternator surplus and may vary with vehicle age or design.
It uses voltage recognition with an adjustable start voltage range of 11V–30V.
Yes, in Reverse Charging Mode via the EcoFlow app (requires XT150 cable and DELTA Series product).
- RIVER 2: 2.4 hr
- RIVER 2 Plus: 2.6 hr
- RIVER 2 Pro / RIVER 2 Max: 3.5 hr
- RIVER 3: 2.4 hr
- DELTA 2 (1kWh): 2.4 hr
- DELTA 3 / DELTA 3 Plus (1kWh): 2.5 hr
The charger supports 11V–31V input, making it suitable for most 12V or 24V vehicle starter batteries.
- Charge Mode: Uses the vehicle’s alternator to charge the power station.
- Reverse Charge Mode: Uses the power station to charge the vehicle/RV battery with high current (XT150 + DELTA required).
- Battery Maintenance Mode: Similar to reverse charging, but lower current (max 100W) for battery longevity (XT150 + DELTA required).
