chinese mppt wind charge controller do they work part 2

these chinese wind mppt charge controllers do work well however the label rating are falsely labeled.on 12v turbines at 400 watts the brakes come on in tandem with the dump load resistor. at 500 watts 12v the 40 amp on board fuse is reached.no were in the product specs does it say that.so i only want that to be addressed and not false claims as to the advertised ratings on this channel.