Solar Converters Inc. provides a variety of ways to charge a battery from solar.
The traditional way to charge is from a standard voltage panel, for example 12 or 24 volts nominal and charge a 12V or 24V battery. The Power Tracker® or PT line of charge controllers are used for this type of charging. The PT line of charge controllers have a wide range of panel and battery voltages which can also be customized upon request.
Other situations may limit the PV input voltage while needing to charge a higher voltage battery. An example of this is on a golf cart where roof space is limited. Since it’s difficult to mount a series array of panels to get the voltage high enough to charge a 36, 48 or even 72 volt battery, a boost charger is required. The CV line of boost chargers is capable of charging higher voltage battery from a lower voltage panel.
Similar to the solar CV boost charger, this line of controllers will charge a higher voltage battery from a lower voltage battery.
Shunt regulators or PWM chargers are the cheapest way to charge batteries. While not as efficient some situations require small and inexpensive charge controllers. These controllers use a PWM or Pulse Width Modulated technique to prevent batteries from overcharging.