BFL13 wrote:
westend wrote:
red31 wrote:
different sg from different battery makers or different batteries will yield different voltage @ the same temp.
x2
I wouldn't be concerned with a voltage of 12.6 in the morning. I sometimes average 12.0 or even lower. As soon as sun hits the solar panel, the voltage is rising. In a perfect world, batteries should only be drawn down to an 80% level for most efficient use. I may increase my battery capacity so that I can get close to 80%.
Just means lugging around extra weight of AHs you will never use (50-80) IMO only good reason for more batteries is to keep the inverter from alarming off at 11v when you make your morning toast.
I'm using the inverter 24/7 to power a 120V fridge. I know I would sleep better with an extra 220 AH available. Weight means little to me as my batteries are inside, just forward of the axles. An extra 150 lbs (maybe a bit less) isn't going to mean much. What I plan to do is replace the small 100AH AGM bank with a larger AGM bank. All it takes is cable, a wrench, and a fuller wallet.