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Here is the current experimental build of my 100 watt solar shunt regulator. The regulator voltage is adjustable from 13.8 volt to 14.5 volts to accommodate 12 volt lead acid and sealed batteries.
The shunt regulator has two IRL540 mosfets and a MBR1060 schottky
rectifier mounted on the back of a GlacialTech Igloo 7223 / (E) cpu
heatsink with fan and two 100 watt 4 ohm power resistors to handle all
the power. The circuit board only handles the low power electronics.
I made the circuit board for the shunt regulator using my Cyclone PCB
Factory CNC Router.
I also added a variable voltage regulator circuit on a piece of multipurpose board for the cpu cooling fan.
Testing the shunt regulator using my test bench power supplies.