I left my bike on the factory charger and each time I came back after 60 days the battery was dead. The charger defaults to error about 5 - 10 minutes after it is plugged in so everything looks fine when you plug in and leave. The dealer says that this is a software glitch that won't have a patch until sometime in fall. I put a pigtail on and now charge directly to the battery. If you are riding the bike and then leaving in storage for more than a couple of weeks, I recommend that you do the same.