[fizzwheel]

It could be the alarm, but I've left my GSXR alarmed for a couple of months and the battery on it was good enough to start the bike.

How old is the battery ? Remember deep complete discharge is not good for a battery. Also if your battery is old / getting on it may not be holding its charge that well in the first place. Also it would be wise to check that your charging circuit is working properly. Give the battery the best chance you can.

Also colder weather has been known to finish them off and you do need a decent battery at the top of its game to give yourself the best chance of starting the SV, especially as you leave it outdoors all the time.