On LEAD ACID BATTERY 12.0-12.1= 50% charged, and 11.5 would be close to ZERO%, where 12.6-12.7vdc= 100% charged. Did you leave a light on somewhere when you were touring unit? State of charge VOLTAGE best read 30-minutes after removing charger and loads, as you get a FALSE HIGH surface voltage from charger that disappears.
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THenne1713
2000 Conquest LE 6266, Class-C on 99-E450SD, 6.8, 2v, V-10
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