Can I use a Navitron vacuum tube solar panel with a drain-down system?
Drain down systems are a fairly primitive method for frost-protection. The components are large, expensive, and can easily be avoided using Navitron solar antifreeze or the frost-protection feature of the Navitron controllers. However, if you already have a drain-down system, it is possible to replace your existing panel with a Navitron panel in most cases.
