I like my vacuum wipers which I guess are also electric because I power them with a Mercedes diesel electric vacuum pump mounted where the battery box was. The hose to the wiper motor is in the wire harness and no one notices. Instead of single speed, 2 speed, or 3speed wipers I can have from one cycle an hour to launch the wiper blade like a javelin fast. Pulling a loaded trailer uphill has zero affect on wiper function.
