BFL13 wrote:
"They started at (isolated) 11.5v which is close to Crowns claimed 50% SOC even though SG read 1.120"
I haven't looked at Crown specs, but Trojan uses 12.1v for 50% at 1.172SG. My Interstate and Exide 6s show similar numbers at 50% (as confirmed by AH count etc) Hard to believe 11.5 is near 50% with Crown.
Trojan has 10% SOC as 11.51V. They have 30% for SG 1.124 Another chart shows 1.120 as Zero % SOC.
Yes, those numbers definitely stray from the norm. Maybe I misinterpreted. This jpg shows end-cycle (50%) voltage as 1.94v per cell times 6 cells (2 batts) = 11.64v

Click For Full-Size Image.