The "red box" in Dynon's product line is not VP-X. Vertical Power is owned by Astronics, inc. and they are in Kirkland, just down the road, but not the same people as far as I know.
I called the Kirkland number a couple of months ago and left voicemail. I got a return call in a couple of hours and my question was answered pretty quick. I think it's a one man operation. So, if no one is answering there, maybe call the Astronics corporate office in NY.
Astronics Worldwide Headquarters
130 Commerce Way
East Aurora, NY 14052 USA
+1.716.805.1599
The PPS is a new, high-current power system for experimental and light sport aircraft. EAST AURORA, NY, July 24, 2019 – Astronics Corporation…
investors.astronics.com