EcoFlow 500W Alternator Charger tops off an EcoFlow or compatible portable power station using your vehicle's alternator while you drive, charging up to 5x faster than a standard 12V accessory outlet. It can recharge 1kWh in about 2.1 hours, using surplus power your alternator is already generating.
It runs on 12V or 24V vehicle electrical systems (11V–31V input) and ships with an XT60 cable, which supports Charging Mode with EcoFlow RIVER and DELTA series power stations as well as most third-party portable power stations. Reverse charging (power station charges the vehicle's starter or RV house battery) and battery maintenance modes require the separately sold XT150 cable and only work with EcoFlow DELTA series products — they are not available with the included XT60 cable or with third-party power stations. Connecting to a DELTA Pro specifically requires an additional DELTA Pro to Smart Generator Adapter, sold separately.
Installation is no-drill: the fuse cable connects to the vehicle battery, the input cable routes through the firewall near the driver's seat to the charger, and the output cable runs to the power station. The install is DIY-feasible, but EcoFlow recommends a professional handle the wiring.
Key Features: EcoFlow 500W Alternator Charger
Built to keep a power station topped off on the move:
- 500W fast charging, up to 5x faster than a 12V accessory outlet — tops up 1kWh in about 2.1 hours.
- 3-in-1 design: alternator charger, battery maintainer, and jump-starter functions in one unit.
- Gallium Nitride (GaN) power electronics for higher thermal efficiency in a compact housing.
- Compatible with EcoFlow RIVER and DELTA series power stations, and most third-party portable power stations, in Charging Mode via the included XT60 cable.
- Reverse charging and battery maintenance modes available with the separately sold XT150 cable, for EcoFlow DELTA series products only.
- Apple CarPlay and Android Auto integration through the EcoFlow app for in-dash charge monitoring.
- Built-in reverse polarity, overcurrent, short-circuit, and over/undervoltage protection.
- No-drill installation; wiring routes through the firewall near the driver's seat.
- 2-year warranty.
Documents: EcoFlow 500W Alternator Charger
EcoFlow 500W Alternator Charger Manual
Specifications: EcoFlow 500W Alternator Charger
| Model | EF-MS-H02-1 |
| Net Weight | 3.53 lbs (1.6 kg) |
| Dimensions (W x D x H) | 9.5 in. x 7.6 in. x 1.4 in. (242 x 194 x 35 mm) |
| Charging Mode Input | 12V/24V (11V–31V), 45 A max. |
| Charging Mode Output | 40V–60V, 500 W max. / 24V, 360 W max. |
| Battery Maintenance Mode Input | 40V–60V, 3 A max. |
| Battery Maintenance Mode Output | 13.8V/27.6V, 100 W max. |
| Reverse Charging Mode Input | 40V–60V, 13.2 A max. |
| Reverse Charging Mode Output | 13.8V/27.6V, 500 W max. |
| Fuse Rated Current | 125 A |
| Wi-Fi | 2412–2472 MHz, 18.22 dBm max. output |
| Bluetooth | 2402–2480 MHz, 7.89 dBm max. output |
| Protection | Reverse polarity, overcurrent, short circuit, over/undervoltage |
| Operating Temperature | -4°F to 140°F (-20°C to 60°C) |
| Storage Temperature | -22°F to 158°F (-30°C to 70°C) |
| Operating / Storage Humidity | ≤95% |
| Warranty | 2-year |