Yes well, in term of modification that i can do, there's stripping the 240v from the electric heating and i guess that will also somehow lower the overall amp usage(?).
Regardless it would let me use some yummy PSU. But i know and understand that i'm inherently limited since the continuous load limit would be 100A and i need headroom if i want to use the oven without resetting the breaker in the electric room in which i have no access to.
I don't use a whole lot of electricity outside of mining, but i still need the hot water tank, the fridge, oven and A/C in summer.
Have you looked at electric heater breaker? I would be surprised if it is 240 in a apartment. I would guess you have cenrtral heat/air in apartment. But i could be wrong. Assuming you have washer/dryer then decent chance of 240. And hot water might be but I would not touch it as any leak would be horrible if cord for miners got it.
With having no access to electric breaker you really won't know a lot about setup. And if you experiment trying to find out the land lord will not be happy if your tripping breakers a lot.
I do have access to my outlets's breakers, but the panel itself does not have a main breaker. So if i overload the 125A for the complete panel, the breaker switch for that is not in my apartment.
For heating, i have 2 * double 20a 120/240v breakers. I was told that was most likely on 240v. I'm more wondering what i will get in my next apartment. Since i don't absolutely need to go through the trouble at the moment. I'm close to 10kW and i don't really want to go any higher since the board says 125A limit.
If switching to 240 would lower my amp usage by half, that would be niice though. If its as simple as to bolt the heating's wire in an outlet box and then plug a 240v psu in, then it could be doable to easily replace it back without it being noticed when i need to give back the apartment.