Pulse Width Modulation (PWM)
Pulse width modulators (PWM) are a type of solar charge controller that slowly reduces the charging current to avoid overheating the battery after it has reached the regulation setpoint. At the same time, the system continues to send the highest amount of energy over the shortest period of time , which results in rapid charge and high efficiency. Essentially, a PWM charge controller helps to increase charge acceptance of the battery while maintaining high battery capacity for a longer period of time. Choose from brands like Morningstar, PowerFilm, Solar Boost, and Xantrex.
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