Originally Posted by lsbrodsky
I could make a suggestion if I had a better idea of how your batteries are wired up. If they are all in parallel your controller is only going to tell you solar panel output when there is sun and the battery voltage of the "good" batteries when there is no solar panel output. % charged is not a useful parameter as it is really a proxy for voltage. A more useful device is something like the Trimetric that will let you better explore battery performance, but with 4 in parallel I do not know how you would see a problem in one battery.
Old thread but I am just getting to fixing my battery performance problem. The inside battery + connects ( through a 100 Amp fuse) to the outside battery + via a shared connection at the battery side of the solenoid. The -s are connected at the - buss bar. The inverter connects only to the inside batteries.
So when I blew the 100 Amp fuse, there was no charge going to the outside batteries and they eventually died. This went undetected by the solar controller because it was just picking up the SOC of the inside batteries and all appeared ok.
I have now purchased a Trimetric 2025, following your excellent advice, since this will tell me (among other things) if my tank is really full or, under the current set up, just half full if I blow another fuse. My goal is to connect all batteries in parallel and monitor with the Trimetric.
My understanding of the Trimetric instructions is that only the battery -s from both banks connect to one side of the shunt and all other -s connect to the other side. The other -s would include the inverter and all other -s that are attached to the - buss bar under the setee.
My process would be to disconnect both battery -s from their existing location on the -buss and attach them to the shunt and then attach the - from the inverter to the other end of the shunt as well as adding a wire to connect that end of the shunt to the - buss bar. The result is that all other -s are on the same side of the shunt in accordance with the directions.
Does this sound like I am on the right track?
The batteries that I killed still seem to be holding up at 13.197 today although they have only been providing the power required when sitting in the "use" mode since the Airstream is still in storage (-12 this am) and they are being charged by the solar. Jim