Following up on the last post I completed the monitor install. My first attempt at reading the output off my phone failed but when erased the Victron app and re-installed it everything worked. That was two weeks ago. Today I took out the out $40 solar charger (which had worked well) and put in the new Victron 75/15 which like the monitor communicates with my phone. Voila, worked right away and to my surprise my solar array (150 watts ) was putting out 20.20 volts. I'll follow it and put some of the stats on here.
The only remaining issue is connecting the starter battery (as opposed to the house batteries) to the monitor so that I can get a readout from it as well. Easy job. I'll take some pics and show details.