The Victron Energy BlueSolar PWM LCD / USB controller is in essence a switch that connects a solar array to the battery. The result is that the voltage of the array will be pulled down to near that of the battery.
Liquid crystal display
For status monitoring and set-up
Over-discharge of the battery can be prevented by connecting all loads to the load output. The load output will disconnect the load when the battery has been discharged to a pre-set voltage. Some loads (especially inverters) can best be connected directly to the battery, and the inverter remote control connected to the load output. A special interface cable may be needed, please see the manual. The connect and disconnect voltages are adjustable.
Day/night timing of the load output
This option allows for a pre-set ON-time after dusk.
Programmable battery charge algorithm
Preprogrammed algorithms for AGM, GEL, Flooded or LiFePO4 batteries (with internal BMS only)
Two 5 Volt USB outputs
Maximum current (both outputs combined): 2A
BlueSolar PWM LCD / USB - Charge Controllers - User Manual