Although I have previously stated that the podpoint pp-e-170209-1 pcb makes some very concerning arcing noises when the relays turn on and off, I have continued to use it. It appears to be the case with every podpoint I've ever had, so whatever.
My board only has two single-phase power relays, but there's enough space for four huge ones to switch three phases. These two, when connected in series, have a resistance of 78 ohms and likely draw about 150mA from the 12v rail.
I just built a cmos timer for the system, and it runs on a 12v rail fed by a 7806 regulator, a couple of 1000uF capacitors, a diode, and a 47 ohm resistor for some smoothing. A handful of LEDs are driven by the circuit, which uses no more than 10mA to demonstrate its operation. It would take a significant drop in the 12v rail to upset the regulator, since it is likely to be satisfied with a 9v input.
Regardless, I still get the same result as when I initially turn on my Rolec tester whenever I plug in the charging cord. As chatgpt suggested, I increased the capacitance on the podpoint board from 680uF to 1000uF, but I still don't get it.
The podpoint power supply may not even have enough juice to run its own relays, I'm not sure. What do you think?