Slownsy wrote:
The way I see it the main resen for not using PWM is cheaper panels cheaper wire but more ekspensiv controller, and if partial shade less pover and bypass diodes also robs pover.
Not my experience. Bypass diodes can and have provided MORE power. For example with my 3 bypass diodes for each of my 3 panels in series I essentially have 9 panel sections at 90V (30V per panel and 10V per bypass section). I've gotten charging with only 2 sections in the sun - ie 20V. PWM with parallel panels would be no power.
I've seen my panels with partial shade ramp up in 10V increments from 20V to 90V as leafy shade leaves the panels. I know how bypass diodes work from research and actual logs from my controllers.
Yes bypass diodes have about a 0.5V drop. But with partial shade one of my serial panels with MPPT can be producing the given amps at 10V or 20V while an equivalent PWM panel would not produce any power.
