Victron Blue Solar PWM Controller

They are recommended for panel applications where one or more panels (connected in parallel) have a maximum power point voltage that is relatively close to the battery absorption charge voltage. So called 12 and 24 volt panels connect through the PWM controller to the battery. For more efficient operation, it is better to employ MPPT style controllers when the panels can be connected in series or if higher voltage "grid-tie" panels are available.

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