Hedges
I See Electromagnetic Fields!
- Joined
- Mar 28, 2020
- Messages
- 20,948
SolarEpic 60amp controller (made by ipandee/ipanda) has 150v max PV input.
This particular array was 3x 310w 72cell panels in series for about 120VOC.
I use this right now for testing, and doing videos. The battery hooked up at the time was 4s 100ah LiFePO4
25% voltage headroom above data sheet VOC should be fine for any temperature.
If you got the transistors out (I didn't watch the entire video), maybe you can find what voltage rating they have.
I think the buck architecture has MOSFET withstanding voltage between PV Voc and ground, plus a diode drop. I wonder what voltage develops across diode before it starts conducting? Diodes are (usually) slow, MOSFETs are fast. There could also be a MOSFET for synchronous rectifier to reduce voltage drop and power loss.
Hmm, I'm not the first to think of that:
Just one of many possible failure modes. Simple overheating is another. But you're at a fraction of the rated current.
Your choices may be to do the engineering original designers didn't, or buy a unit from someone else who did.
Silk purse and sow's ear, you know.