Thanks again for the advice. I made a working prototype and attached it to my pump: Image

For now I’ve used just optocouplers to drive the mosfets, since pulling p-type gates down to above -24V seemed like a hassle. I’ve ordered some IR2210 gate drivers and intend to use those with PWM later to not have to use a buck converter.

Here’s a video of the pump. drive.google.com/file/d/…/view?usp=sharing