Battery Monitors
I've nearly completed my upgrade to my Solar System(Pics coming when I'm done). Thinking(after the fact of course)that I should have considered a Battery Monitor in the upgrade, or at least preparatio...
Forum Discussion
BFL13 wrote:
How do Li batts work for charging efficiency anyway? Wets go crazy for heat loss going past 80% SOC on up. AGMs heat up too.
If Li batts have better charging efficiency, then a straight AH counter when charging would be more accurate than with Wets. (The Trimetric has a built -in allowance for heat loss while charging, but it is not expected to fit all batts. You can adjust that if you do enough trial and error work on that for your own set of batts)
Not sure what it means that Li has that slow rise in voltage. I doubt it means poor charging efficiency. ?
Here is a follow up charging the lfp batteries with some #s. Using a eu2200i generator, using a Magnum inverter/ charger (max 125a charging) I set my AC input to 15a on the remote display.
Totally overcast today no charging from solar. Started at noon at 53% SOC (prior readings 13.13v), didn't really plan to do any recording and didn't get a starting voltage.
12:00 53%
12:24 Bulk 59% 13.60v(reading from monitor) 105.8a(charging) 57f(cell temps)
13:39 Bulk 86% 13.76v 102.5a 62f
14:01 Bulk 94% 13.90v 100.4a 64f
14:03 Absorb 95% 14.09v 80.4a 66f
14:08 Float 99% 13.76v 0.1a 71f
Generator turned off, reading after, cell temps drop.
14:20 Float 99% 13.60v -12.0a 64f
In 2 hours 8 minutes went from 53% (265ah) to 99% (495ah), total 230ah.
I would consider that pretty efficient. ;)
