SMPS

I don't know. Maybe something like a step down transformer with a broken leg.

Some times I think that if we do not know how to answer it is better to let other people do it, it is the best way to become a super guru.

The device is a PERSONAL device and for the safety of the user only low voltages are allowed. The maximal accepted value is 42 V which will be next used in cars.

Many other devices are converted to 220 V but the existing laws do not support this change.

If you want to supply with 220V you should change the motor, it will be smaller but in case of insulation loss the user could be harmed and you will pay the bill.

250 kilograms is a big person; 32 amps in a bottle. (shudder)

milo

By a transformer and some big diodes. Talk to someone in your neighborhood who knows something about electricity, and he may be able to help you.

Either change the electrical parts so that the electrical system works on 220V AC or add an inverter to convert the 36V DC to 220V AC (which is not a very good idea due to the increased weight and cost).

What is the application and why do you want to change over to 220V AC? Are you trying to convert from heavy batteries to a portable AC generator (or a really long extension cord)?

Can you provide more information please.