This is a picture of my EPever mppt 40 amp charge controler.
I'm using a Phillips head screwdriver but doesn'tseem to be tight enough on wire termination.
Actually looks like a slotted pozidriv.
very common in electrical gear, very much a pain in the arse unless you have the right driver and size, cause neither a pozidriv or flat blade work well at all to apply the needed torque. "Modulo" is a common name for them if you want to invest in the proper bit for them.