Yes--at any given moment during the sunshine charging
day, the MPPT
Controler gives a reading of the amperage throughput from the solar panels
to the battery
. If the charging
exceeds the demand, eventually, the controller shows decreasing throughput and a lovely little red LED light begins doing little flashes that eventually turn into a constant red glow showing that "float" had been achieved.
After I had designed and installed this system on my boat myself, I sailed to/from Hawaii
from/to U.S. West Coast
and had exceeding enjoyment, (rapture?), while I sat and watched the MPPT
controller little red LED light flash and then shine steady, flash and then steady again, and so on, while the refrigeration
unit cycled every 25 minutes drawing 3.5 amps, and the autopilot
drove the boat drawing amps all the while I sipped a huge ice-filled tumbler of cold refreshment.
Originally, I talked to the owner of Aurinco about his thin flexible panels
as I thought I would "sprinkle" them around the boat deck
as an installation
. He told me that he was behind on orders because the panels weren't meeting the output specs. After further research/investigation of solar panels/efficiency of various panels/manufacturers, I decided to go with the rigid panels--'glad I did. They are very efficient--all in parallel, so if any one of them gets shaded, it doesn't reduce production throughput from the others. These panels were much less expensive as well.