Voltage should of been at least 14. Sounds like a bad battery or not charging properly. I’m not driving my cars very much. Don’t have this issue. Cold *** weather can really do a number on batteries.
Fully charged battery out of factory is 13.2. Running voltage is minimum 1 volt above battery voltage with accessories on. So with Daves battery at 12.7, engine on and all the goodies running should be no less than 13.7. Ideal is 14.2 to 14.6.
