[cknuth]

One more speculation IF I continue using the CC/CV mode: as shown on my timeline, it took less than five minutes to bring the house batteries back to essentially 100%SOC from the Recharge level of 13.3V. Presumably, it will take a little longer from my new setting of 13.0V. But certainly not the two hours called for in the Charge Time recommendations. Is there some other reason for that long "absorb" time?

And if the CC/CV configuration doesn't have a float mode but rather a "freefall" mode, is it healthy to yo-yo the batteries through endless small-percentage charge/discharge cycles?

A lot to talk about with BB.