And, once upon a time low voltage (low cell count) "battery" panels were widely available and competitive in price, before the advent of grid tie made a market for higher voltage panels. Couple that with the newness of the MPPT technology and you had a reason to make PWM controllers.
As of now, though, high power PWM controllers are a holdover product that has not realized that it is dead yet.
As of now, though, high power PWM controllers are a holdover product that has not realized that it is dead yet.
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