That spike's enormous; unless the PC is like a server rack, I'd be really shocked.
Does someone start a batch of cookies every noon? Weed grow lights? You say it's not AC, heat, or EV charging, and I think it's too big to be the fridge, so I'm stumped.
Right??? Ok I just called BGE again at the rec. of @jostewart.bsky.social , and they're gonna people out to do a couple of what sound like vaguely diagnostic visits. The second BGE lady who I talked to said, "I am CURIOUS to know what is going on here!"
An EV charging spike is what you see here at 2:00 AM. The anomaly in both cases is pretty small, what you'd get from taking a hot shower, microwaving/air frying lunch and drying your hair.