You are a clever chap Ron
Same here- I'm retired, but miss some parts of work, but not the politics and procedures, meetings and reports, BS and appraisals...Some time I should find out what you do. (off line) I think we have much in common.
Many time while I slowly type your post the answer. LOL
Off to work I go.
If the OP could be persuaded to use an MCU, MPP could be implemented and the motor could be turned on and off by the MCU too.One idea for the single cell project.
The "SW" is set to turn on at 1.7V and off at 1.0V.
Boost maximum is 1.75V Probably should be set to 2V.
Not running exactly at "max power point" but close. It will take many more parts to run exactly at max power.
There are separate approaches from Ron and me.
Got it. Thank you Spec, I'll try them both. I really liked some of the things you linked in post #53.You must use the components as specified, especially the PMOSFET shown in the schematic of post #54.