Victron feature a wide range of both MPPT and PWM solar charge controllers. The two main ranges are the BlueSolar and SmartSolar Charge Controller MPPT. In the VIctron MPPT model names, for example MPPT 75/50, the first number is the maximum PV open circuit voltage. The second number, 50, is the maximum charge current. For more information about PWM or MPPT charge controllers, read our whitepaper: which solar charge controller: PWM or MPPT?