Had to Lower My Solar Float Voltage-Update
Updated 9 July Just a note for folks in a similar situation. My usual procedure in a normal summer here with my set-up with the Eco-Worthy controller (adjustable Absorb and adjustable Float ) is...
Forum Discussion
Today was a little different, so this needs more watching.
I checked SG when battery voltage passed through 14 and it was not up to "full SG" like it was very close to being yesterday. So waited until it went from Bulk to Float and SG was just a titch less than baseline SG. Say 1.280 instead of 1.285 for size.
Trimetric says minus 2.4AH so that fits. (it should be up to plus 10 or so at full SG) Apparently, it could do with a little time at Vabs today and not be down to Float already.
However, there is such a thing as "SG Lag" and even at Float the AH counter should gain some like it did yesterday, so I will check SG again later and see if it got up any.
I wonder if being at 13.2 for so long yesterday slowed it down somehow, so it needs more effort to get to baseline SG than it did with the 14.5v float previously. Or it might be that the cycle was a little deeper today where a few more AH got used. Or both.
I believe there is some sort of line you cross when going deeper that it takes more effort to get back up than if you start shallow. IE it is not a linear effort. ISTR that was one of the things that came out of the Screwy 31 study? Not too clear on that.
Anyway, this has to run a few more days before general conclusions can be made, so I will not adjust the plan yet.
I should have known this would not be so easy to get right the first time.
I checked SG when battery voltage passed through 14 and it was not up to "full SG" like it was very close to being yesterday. So waited until it went from Bulk to Float and SG was just a titch less than baseline SG. Say 1.280 instead of 1.285 for size.
Trimetric says minus 2.4AH so that fits. (it should be up to plus 10 or so at full SG) Apparently, it could do with a little time at Vabs today and not be down to Float already.
However, there is such a thing as "SG Lag" and even at Float the AH counter should gain some like it did yesterday, so I will check SG again later and see if it got up any.
I wonder if being at 13.2 for so long yesterday slowed it down somehow, so it needs more effort to get to baseline SG than it did with the 14.5v float previously. Or it might be that the cycle was a little deeper today where a few more AH got used. Or both.
I believe there is some sort of line you cross when going deeper that it takes more effort to get back up than if you start shallow. IE it is not a linear effort. ISTR that was one of the things that came out of the Screwy 31 study? Not too clear on that.
Anyway, this has to run a few more days before general conclusions can be made, so I will not adjust the plan yet.
I should have known this would not be so easy to get right the first time.
