Middle name is not a thing where I live. People can have 1 or more given names (I know of people that have 9), but none of these are considered 'middle name'.
I'm no specialist, but (1) don't most solar panels have a fixed inclination and orientation? Depending on the location that will not be as optimal at each day of the year because of the tilt of the earth. (2) The weather/cliimate will have an effect too.
Your 2nd image is apparently showing kWh/kWp - so the longer term yield (h=hours) divided by the theoreticall maximum (p=peak). So it shows longer term efficiency , vs the yield at a certain moment like you appear to be focusing on.
5e RAW, they remain invisible. However, using the tinderbox will make noise so enemies will likely notice that.
In the 2024 rules, dealing damage (even if not by attacking) causes invisibility to end.
NOTE: both versions of the rules (see the oil item description) state that in this scenario, an enemy only takes damage if it enters or ends its turn in the oiled space. Starting their turn in the burning oil does not cause damage, so just moving out of the space will prevent the damage. The lighting of the oil also does not cause immediate damage
So far, I've played three sessions with three different groups. Haven't run into big issues yet. Next session I will be using monsters from the new MM. I'm curious to see how the balancing turns out.
Sorry to have bothered you all. Now it works 🤔