High Frequency Off Grid Solar Inverter PV1800 VHM Series (2-5.5KW) PV1800 VHM is a multi-functional inverter/charger, combining functions of inverter, solar charger and battery charger to offer uninterruptible power support in portable size. Its comprehensive LCD display offers user-configurable and easy-accessible button operation such as battery charging current, AC/solar charger priority, and acceptable input voltage based on different applications. Features: . Pure sine wave solar inverter . Output power factor 1 . High PV input voltage range . Built-in 80A MPPT solar charger . Battery equalization function to optimize battery performance and extend lifecycle . Built-in anti-dusk kit for harsh environment Anti-Dust Kit: After installing this anti-dust kit, inverter will automatically detect this kit and activate internal thermal sensor to adjust internal temperature. By virtue of the dustproof design, it dramatically increases product reliability in harsh environment.