This Victron Energy SmartSolar MPPT 75/15 solar charge controller efficiently gathers energy from your solar panels and stores it in your batteries. It uses the latest, fastest technology to maximize energy harvest, ensuring full charge in the shortest possible time. The controller maintains battery health and extends its life. It features MPPT (Maximum Power Point Tracking) for ultra-fast tracking, constantly monitoring the voltage and current output of your solar panels to extract every drop of available power, especially beneficial during changing light conditions. With built-in Bluetooth, you can remotely monitor and control the extensive features via the VictronConnect app on your smartphone or other device. For internet-connected installations, the Victron Remote Management Portal (VRM) offers full access to MPPT features from anywhere, both services are free. For remote locations without internet or phone signal, monitoring via Bluetooth pairing with a LoRaWAN device is optionally available. The controller supports solar panels up to 220W (12V) / 440W (24V) and up to 75V open circuit voltage, with a maximum charge current of 15 amps. It includes an intelligent load output and a VE.Direct port. The construction is strong and durable.