For #solarProtocol, only the current (as opposed to the power or voltage) is unique between the solar panel, battery, and rasberry pi (connected in parallel with the battery).
This recording is a sonification of that data on Oct 06, 2022. You will hear the pitches of solar panel and battery's current (more current = higher notes). They are similar but not exactly the same, so I sent them to a range of 3 octaves starting at G2 and G3 respectively on violins.
At the start of the day, the pitch is consistent because the system is on but there is no sun to provide energy (you may want to skip to the 40 second mark). Since 24 hours is compressed to 3 minutes, you will hear changes in activity right before and after the 1 (sunrise) to 2 (sunset) minute mark.
At 6:30-9:00 (~50-70 second mark) there is silence. The battery ran too low and cuts off the pi's power, so it stops data logging. When the sun comes out in the morning and the battery has enough charge the pi turns back on and starts logging again, allowing notes to be heard.
The pi's current is a consistent draw within a range of .18-25 ish that averages .22 on this day. I created a drum beat that plays every 4 seconds using a mapped pitch of the average in this range to keep a sense of rhythm. (Technically, it shouldn't be playing when the system is down :P)