What is the input voltage range of the k16 board? Does it have to be exactly 12v or is there a range?
The reason I ask is that I have a small solar system (430 watts) and I wonder if it's possible to connect a k16 board directly to my 12v battery bank.
The voltage varies between 11 - 15.5 volts depending on battery charge and load level.
The regulators will work up to 21V. Component selection may have issues with input below 12V. I don't think the input voltage would be a problem but stability or noise could be. You could test it and see but that would be entirely at your own risk. In theory it could work and shouldn't damaged by the voltage levels indicated - you may want to clamp voltage to ensure it cannot go higher.