Side effect of solar + alternator charging

A few months I noticed something odd about my isolator charging system.    Then started to see a pattern.  Finally figured it out and wanted to share since this issue could affect others.

Cheap PWM as LVD/HVD

Yesterday I was thinking about needing a High Voltage Disconnect.  These are much harder to find than Low Voltage Disconnects, where are everywhere on amazon and eBay. Then I remembered the $8 cheapie controller from the shallow cycling experiment.  The LOAD output has a LVD and HVD setting.  Hmmmm….. It’d be cheaper (and easier) to