I just received a 2nd 5kw op battery, and I would like to verify how to connect this correctly with my master battery without a bus bar. Can I use the 2nd battery connection terminals from my master battery to my new 2nd battery, or do I need to connect the cables going to my 2nd battery to the same connections on the master battery? Any other information on communication between batteries and OP inverter also would be helpful.

I've had my 48 V opsolar battery and 6.5kw inverter for less than a year. I also have a 2KW off grid solar panel set up with this system. Until today I was producing circa 1500 watts an hour when the sun was up, which would charge my battery and other loads. Today when I went to check on my system at around noon in full sun, I noticed my inverter only producing about 100 Watts on each of the two MPPT strings (200 watts total) to charge my battery, and my battery would not get above a 40% charge level. When I put another load on, the inverter then quickly went up in production to about 1300 watts, but my battery still did not charge beyond 40% with the inverter. Anyone have any clues for this, and how to rectify the situation? Another thing I noticed is that despite my turning the battery off and the inverter off, the inverter stayed on until the sun disappeared. Is my inverter supposed to stay on with the sun up, and the power button turned off? When the solar power to the inverter finally stopped and the inverter turned off, the inverter started a nonstop clicking noise. For fear of damaging the inverter, I turned the battery and inverter back on to stop the clicking noise.