I presume it's ok as it is still being used on 240 at 50hz. Just a little thought does the ets150 not use plug it cables. Maybe use a plug it cable with the correct plug already on
It uses a plug it cord but I like having a cord in each systainer saves a trip back to the van if there's not one in the box,
I feel as doh it should not be a problem
Maybe a quick email to customer service will solve everything