JLCPCB Prototype for $2(Any Color): https://jlcpcb.com
Soldering in the final component - a P6KE33CA. Smothering the PWM5 solar charge controller in UV glue. Attaching the various connectors and taking the finished unit outside to charge one of the 12V Trojan batteries on my powerwall.
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https://www.youtube.com/watch?v=ACWHUpw_NR0