More on the Eaton devices. They do support a CSV export. But this has to be done manually through a Java-enabled web browser. It also has intervals no smaller than 5 minutes. I need at least as small as 1 minute and I need to get that data into my software within a minute after the interval ends. Their metering device, and the web service is includes, does provide a lot of features for what I call "review analysis". That might be useful. But the automation I'm planning does not seem to be doable with Eaton's equipment. Of course, I will call them up to see what more is really possible at the engineering level.