More on AGM State of Charge open circuit voltage...
SOC Flooded, Gel, AGM
100% 12.70 12.85 12.80
75%.. 12.40 12.65 12.60
50%.. 12.20 12.35 12.30
25%.. 12.00 12.00 12.00
0%.... 11.80 11.80 11.80
From here...
http://www.energymatters.com.au/renewable-energy/batteries/battery-voltage-discharge.phpI like Lifeline. Not sure why they’ve chosen to stray, but the parent company, Concorde also says 12.3VOC is 50%.
http://www.concordebattery.com/otherpdf/ownermanual.pdfhttp://www.concordebattery.com/otherpdf/5-0324-rg-manual.pdfFrom here...
http://www.concordebattery.com/main_air_tech.php