Almot,
I ordered the GT Power RC 130A Power Analyzer you mentioned earlier from Amazon for $13. It should be here today. It had lots of great reviews. It should do what I want. As I stated earlier, I just want something that I can glance at and tell me my 12 volt system is where it needs to be. We do a good job of monitoring both of our RV 12 volt systems and we get many years out of a set of batteries with near zero no problems.
The little cheap solar charger I have seems to do a good job, I just don't want to get the multi-meter out every time I want to see the status of my 12 volt system.
mtnman