Yes, DMM sent me an application note after I blew my drive the first time I powered it up. They say they are good to 240v + 10% (264V, but they are apparently very sensitive to spikes, as my voltage was about 245V at the time.If you did go with the Dmm system and use there high voltage Servo Drives, you would have to use a line reactor, or a Transformer so you can stabilize your line voltage, or you would kill the servo Drives with the over voltage that you are experiencing, this would be a must to get under control for any system you use
I'm going to use a transformer to lower my voltage to 220V, and will also probably add the line reactor as well.
They did repair the drive for free. I just had to ship it to them, which cost me $40.