iansmith Report post Posted June 22, 2019 I tend to leave my car for a month unused while traveling 2-3 times a year and am worried about killing the 12v battery. I've seen mention about people using solar chargers (smart chargers so it doesn't over charge) and was wondering if anyone has any brand recommendations or success stories? Should I hook it up to the trunk battery, or the front hood terminals? Other that potential hydrogen gas buildup when doing the initial hookup in the back, any reason not to wire it up there? Am I correct that the HV battery charges the 12v ONLY when the car is started and running? So I don't have to worry about killing the HV batteries if it sits? Any downsides to this? Thanks! Quote Share this post Link to post Share on other sites
murphy Report post Posted June 22, 2019 If the car is off, the HVB will not lose any charge. I always use the terminals under the hood since the car goes in to the garage front first and that is where my charger and outlet are located. I use a Schumacher XC103 charger. Quote Share this post Link to post Share on other sites
