first thing i did when i got home after purchase was charge the battery at 2amps... it took over 18hrs to float. the battery while sitting at the dealer was low.
i only motor my G and Z on the weekends... during the week i use a battery manager/tender. it's cheap (amazon has them) and worth every penny.
also during the 3month hibernation it's plugged in.
Amazon.com: Battery Tender 021-0123 Battery Tender Junior 12V Battery Charger: Automotive