Battery Charge Requirements
Looking into a solar setup for my new trailer, first off is figuring out what I need for controller output to correctly charge my batteries. I'm planning on eventually having a pair of either 100w or ...
Forum Discussion
PWM
The current from the panel follows the iv curve of the panel based on the sun light, the panel matches the battery voltage until the battery voltage gets high enough for the controller to limit current and maintain voltage (14.?v). If the battery ever gets fully charged based on the controller logic, the controller switches to floatof 13.?v.
The current basically stays constant (good sun) till the batt reaches the controller set point of 14.6 or whatever. Then voltage stays constant as current declines.
A PWM controller doesn't regulate current, it does regulate voltage when batt voltage gets in the mid to upper 14s and then the voltage is held constant which forces current to be reduced. If current was not reduced, batt voltage would increase beyond the controller's settings.
The current from the panel follows the iv curve of the panel based on the sun light, the panel matches the battery voltage until the battery voltage gets high enough for the controller to limit current and maintain voltage (14.?v). If the battery ever gets fully charged based on the controller logic, the controller switches to floatof 13.?v.
The current basically stays constant (good sun) till the batt reaches the controller set point of 14.6 or whatever. Then voltage stays constant as current declines.
A PWM controller doesn't regulate current, it does regulate voltage when batt voltage gets in the mid to upper 14s and then the voltage is held constant which forces current to be reduced. If current was not reduced, batt voltage would increase beyond the controller's settings.
