How Much Solar ? First Hand Report
Just got set up here in Quartzsite, two 100 watt solar panels on my receiver hitch mounted polar mount, moving it 3 times during the day. Panes were partly shaded by an old power pole till 9 am, then...
Forum Discussion
The controller only knows the voltage, but the battery knows its SOC, and the battery has a "natural acceptance rate" which depends on its capacity, voltage, and SOC, so the battery decides what it will accept.
The higher the charging rate the lower the SOC when you get to Vabs and vv. My ugly graph shows that clearly. For a typical solar amps of say 15a on a 220AH bank (7% charging rate) you would hit Vabs at about 88% SOC but the same 15a on a 440AH bank would be only a 3.5% rate, and hit Vabs at 90something.
RJ sees 10a on two 12s. Using 220AH that's 4.5% charging rate so it looks like low 90s SOC to me.
The higher the charging rate the lower the SOC when you get to Vabs and vv. My ugly graph shows that clearly. For a typical solar amps of say 15a on a 220AH bank (7% charging rate) you would hit Vabs at about 88% SOC but the same 15a on a 440AH bank would be only a 3.5% rate, and hit Vabs at 90something.
RJ sees 10a on two 12s. Using 220AH that's 4.5% charging rate so it looks like low 90s SOC to me.
