As it turns out, the term LVDC is simply an acronym used for "Low Voltage DC Current" AKA. The method in which most everyone uses to make Colloidal Silver at home. Be it a kit or a home-made circuit(as I prefer), these all fall under the low voltage DC Colloidal Silver processing method.
That said, if you'd like to know more on this, such as how to make one yourself, then I'd be more than happy to post a few simple plans to get you going in a thread on the forums. As I'd prefer to keep such information public for all to see and hopefully benefit from. :)