Solar Boost™ 50 is a 50 amp 12/24 volt Maximum Power Point Tracking (MPPT) photovoltaic (PV) charge
controller. Through the use of patented MPPT technology, Solar Boost 50 can increase charge current up to 30% or more. Solar Boost 50’s sophisticated three stage charge control system can be configured to optimize charge parameters to precise battery requirements based on battery electrolyte type, battery size in amp-hours, and battery temperature. The system is fully protected against voltage transients, over temperature, over current, and reverse battery and reverse PV connections. A manual equalize function is also included to periodically condition flooded lead acid batteries. 

Solar Boost 50 employs series pass Pulse Width Modulation (PWM) charge voltage control. The advanced
multistage charge control system combined with precise PWM voltage control leads to superior charging and enhanced battery performance. To provide optimum charge control on installations where battery load varies widely during charge.

Solar Boost 50 also includes an automatic current limit feature which allows use of the full 50 amp capability without worrying about overload or nuisance fuse blow from excessive current. The PWM control system uses highly efficient and reliable power MOSFET transistors. The MOSFET’s are turned on and off at high frequency to precisely control charge voltage and MPPT.

Environmentally sealed high current high reliability relays are used to disconnect the PV array at night to
prevent unwanted reverse current drain. Relays are used rather than blocking diodes for improved power conversion efficiency, current boost performance and true reverse battery polarity protection in an MPPT controller. The relays are not stressed by functioning as part of the voltage control system and continually turning on and off as with other PV controllers. They simply turn on in the morning and off in the evening, and in this application have a life expectancy in excess of 105 operations.

Since Solar Boost 50 is a high efficiency series pass “buck” type power converter with current limit, the battery can be charged from any power source with a voltage greater than the desired acceptance voltage setpoint, and less than the maximum PV open circuit voltage rating of 57 volts. Examples of this type of use include charge control from hydroelectric or wind generators, or charging a 12 volt battery from a 24 volt photovoltaic system.

Fully automatic temperature compensation of charge voltage is available as an option to further improve charge control and battery performance. The available SensorLug™ battery temperature sensor is built for long term reliability. The sensor element is environmentally sealed and encapsulated into a copper lug which mounts directly to the battery terminal.

A user friendly digital display is also available to monitor PV charge performance. The display may be
provided in the Solar Boost 50 controller, as a remote panel, or both. The remote panel cable may be up to 300 foot in length.

Patented Maximum Power Point Tracking (MPPT) technology allows Solar Boost 50 to increase charge current up to 30% or more compared to conventional charge controllers.