If the MPPT controller allows the stator voltage to climb, then you are effectively removing the heat dissipation from the stator. You will never remove all of it, but you remove quite a bit by using power point tracking. This means that the stator is capable of producing more power, more efficiently.

If you wish to simulate high power mppt effects (while you wait for it to turn up), just use double the battery voltage and watch what happens.... huge increase in power out, no negative stator effects.

The downside will be that you have to live with it... it will behave as a very different animal. If you are used to "stall limited operation", then this will be an education.

I tried 4m mill 48v (nominal 30 amp stator) on 12v, 24v, 36v, 48v, 60v,78v,96v.

On a 12v battery bank... about40-60watts, on 24v bank, about 200-250w, on the 48v bank about 1.2 - 1.8kw, on 96v bank about 3-4kw, on resistance load only (4ohms) over 5kw@140 odd volts

Same stator, same blades, same furl. No stator damage.... just shattered nerves at 5kw.