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
If I'm understanding correctly .... you're concerned about too high a voltage (i.e. "non-float" value voltages) being on your batteries after thay have already been fully charged from the solar.
This reminded me of something strange - and kindof good, I guess - I've noticed about our AGM RV batteries. I have an ammeter permantly installed in their common negative cable. That ammeter has for years shown zero current going into them once they've been fully charged (the ammeter is only 3-place, so can only resolve to only 100 milliamperes). Even if I experimently hit them with 14.4 volts after they're been fully charged, the ammeter still shows "zero" current being accepted by them. I've not read anything anywhere about that type of battery behavior with respect to wet cell batteries.
I think this means, that if you were using AGM batteries, having your solar system sit there supplying high non-float type voltages to them throughout much of the day would be of no concern to speak of ?
I might add, however, that Lifeline told me that a bit too-high voltage left on their batteries year after year during float periods would gradually dry them out and somewhat shorten their life span. Maybe my ammeter is not high enough resolution to show sub-100 milliampere dry-out current levels still flowing into my AGM batteries after them being supposedly fully charged. Even if so, it probably means that AGM batteries would have more dry-out resistance than wet cell batteries ... to too-high voltages from solar panels during much of the day.
This reminded me of something strange - and kindof good, I guess - I've noticed about our AGM RV batteries. I have an ammeter permantly installed in their common negative cable. That ammeter has for years shown zero current going into them once they've been fully charged (the ammeter is only 3-place, so can only resolve to only 100 milliamperes). Even if I experimently hit them with 14.4 volts after they're been fully charged, the ammeter still shows "zero" current being accepted by them. I've not read anything anywhere about that type of battery behavior with respect to wet cell batteries.
I think this means, that if you were using AGM batteries, having your solar system sit there supplying high non-float type voltages to them throughout much of the day would be of no concern to speak of ?
I might add, however, that Lifeline told me that a bit too-high voltage left on their batteries year after year during float periods would gradually dry them out and somewhat shorten their life span. Maybe my ammeter is not high enough resolution to show sub-100 milliampere dry-out current levels still flowing into my AGM batteries after them being supposedly fully charged. Even if so, it probably means that AGM batteries would have more dry-out resistance than wet cell batteries ... to too-high voltages from solar panels during much of the day.
