And anyone know why a transformer can only handle half the load at 240v???
Define 'half the load".
Wattage rating for power flowing through a transformer is the same regardless of voltage.
Now the voltage or current ratings - THAT is what changes. Watts = Volts x Amps.
When providing the same wattage, double the voltage and the current side is cut by 1/2 or conversely cut voltage by 1/2 and available current doubles.,