July 27 update - actuator service installed and running as is sensor service

   Much has been done.
   The power supply booster arrived and has been adjusted and connected.
The script to operate the actuator is finished and runs as a service. The length of day to run, eight hours in summer, was programmed into the operation. The array is now repositioned every 28.4 minutes, throughout the day.
   The script takes into account the start up of the RPi at other than the 'official' start time, 10AM. If early, a wait time is calculated and run as a wait state. If late, the number of missed cycles is calulated and the array repositioned before entering the main routine.
   I replaced the four inch bolt, on the actuator mount, with an eight inch bolt that acts as a rail on which the actuator base can slide. This will eliminate the possibility of the actuator base binding.
   The sensor script is recording data daily, as a service. Some night samples were taken to test the small panels. Two of the panels began low frequency, amplitude modulated oscillation. The panels drop to zero volts in the dark. That test is done. The oscillations may be due to the 'dupont' connectors used.
   A semi-permanent form of wiring connection needs to be implemented. The existing connectors are for prototyping and aren't much good, even for that.
   Currently, I'm examining the installation of suspend and resume/reboot services for use in twenty-four hour system operation. Some operations are initialized every time the system boots and, therefore, need to be accommodated.
   The I2C expander arrived but the design has not been determined yet.
   The actuator power supply has been mounted on a section of vinyl gutter downspout. The fix is temporary but is neccessary to maintain front access at the same time as free air circulation, around the large heatsink on the back of the board.
   The following photos help depict the situation: