The inverter that seemed to have random overnight shutdowns was returned.
Instead, I paid little more and got a newer version that has been installed and running without event for over a week.
I ordered and received fifteen Staubli MC4 connector pairs. Staubli is the original designer and manufacturer of MC4 connectors. This will, I hope, resolve any intermittent connection errors due to cheap, marginally standardized, connectors.
Another improvement is the addition of fifty feet, each, of red and black #8 AWG cable that will reduce any line losses due to existing #10 AWG cables.
A hand crimper, for smaller gauges, and a hammer crimper, for #8 AWG and larger sizes, have been added to my tool set.
A series disconnect switch has been placed in the PV array-to-charge controller circuit. A series 40A fuse has yet to be installed in the charge controller-to-batteries circuit.
A second Epever Triron charge controller was purchased as a replacement/backup for the existing unit. For a while, random fluctuation in csv recorded data occurred in the first 30-45 minutes of operation, in the mornings. I reset the start time to 6:30AM and the fluctuations have stopped. The repair mentioned previously, seems to be holding up.
After some calculations and some thought, and a consultation with Epever, I came to the conclusion the reason my system was not charging at a full 1KW was the batteries are in parallel. If I wire them in series-parallel with a resulting voltage oof 24VDC, instead of 12VDC, the controller will increase the rate of charge. for the inverter input, at a maximum current of 170A.
However, I would have to use an inverter that takes a 24VDC input and mine are rated for 12VDC. The 24VDC verison of my inverter, Xantrex Freedom X 1200W/2000W, is hard to find, especially on ebay, and is very expensive.
I could add a 'buck', or step-down, converter, but they are expensive. The converter would convert 24VDC to 12VDC
For the time being, I'll settle for a 600W maximum charge rate.
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