This is an old revision of the document!
Yes, we can use a battery monitor to see how much power is going into the battery bank. And we can look at the solar charge controller to see how much power it is making.
But how can we tell how much untapped power the solar setup leaves on the table because aren't demanding it? Put another way: how much more stuff could we be running off the solar?
about these summaries
You can get a feel for overall system efficiency by
power available