Just looked up the specs on the controller. The literature says 200-240VAC which I'm told by an engineer at work needs to be multiplied by 1.35 to get the actual DC voltage that is used after the power is rectified. So, that brings us to 270V DC. Talking with the electrical engineer here he didn't seem to think that it would hurt the controller to try out lower voltages. It will simply set off an alarm on the controller.
I did send an email to the mfg. We'll see if I get a reply.
Edit: Corrected formula
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