Yep. That's raw, from a trip to the pump under the canopy at 2AM... it sat there long enough to register on the graphs because I was topping up both the truck and genset, as well as my reserve tank, and got a bite to eat while I was inside.
It's certainly not "real power" in any sense of useful, but remember, PV is a current source not a voltage source, so it takes nearly nothing in terms of photons to make them saturate to Voc. The classic sees this rise, and mistakes it for dawn, and goes into bulk mode. The moment it attempts to draw power from them, the voltage falls back off, and it goes back into resting... where the cycle repeats.
The heat is most likely simply the processor in the classic coming out of sleep, and the board being surrounded by heatsink, some of it gets picked up on by the MOSFET probe.
There's probably a tiny amount of actual external energy involved in heating the MOSFETs up, as the reservoir caps discharge thru the converter, but it's hard to call it much more than minimal. The cycle takes a minute or so total to complete because of timers involved designed to prevent nuisance relay chatter.
I guess you could say it's more an amusing parlor trick than anything else, but it certainly illustrates that LED has gotten intense (and the ones at the station are certainly no exception lol)