For a professional battery charging strategy and load monitoring. State of charge determination and modern charging technology for battery maintenance and control. Module and load current 20 A, system voltage 12 V (24 V). PWM control and automatic voltage adjustment. Overcharge and undercharge protection as well as reverse polarity protection for module, load, and battery. Protection class IP31, negative grounding of one or positive grounding of multiple terminals possible. Input voltage always 2 V above the battery voltage. With the PR 2020 charge controller, you always have your charging under control; not only do you monitor it, but you also protect the battery and thus extend its lifespan. The graphic LC display informs you about the operating states using symbols and provides the state of charge in the form of a level indicator. Data such as voltage, current, and state of charge can be directly retrieved as numbers on the display. Furthermore, the controller features an energy meter that you can reset as a user.