I've regularly used a v2 steamate and never had problems with tripping customers electric, I dont use the heaster on the machine with it if theres any hot water on the job as I just fill up from the customers hot tap and use the inline heater to bring it up to heat, cant see the use in running 2 heaters on the job.
Ive got a spare steammate here thats 4 years old and has only been used occasionaly that I'm thinking of getting rid of, again it can come with a chewing gum wand, small extension hose, powerlead and manual, Andy