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BFL13's avatar
BFL13
Explorer II
Jul 27, 2017

Solar- Series for Higher Voltage vs Parallel Lower Voltage

I keep reading how you do better with the higher voltage in series unless there is shading. With no shading I have switched my three 100w panels back and forth several times (in bulk MPPT that is...
mike-s's avatar
mike-s
Explorer
Jul 28, 2017
time2roll wrote:
The reason to go parallel is to use a PWM controller.
Did you do that when you switched to parallel?
The reason for using PWM is cost. It's hard to picture any scenario where one would be more efficient than an MPPT. If you don't have a controller, buying PWM makes sense for small systems, but if you already have an MPPT, no reason not to use it.

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