The nominal output of the alternator is 18 amps at 3000rpms. You'll have about five or so amps to spare at the maximum output of the alternator on the bike. It is, of course, advisable NOT to run the alternator at maximum output all the time as the windings may fail from being overheated. That failure won't be covered under the factory warranty. Be mindful of the total consumption of the items that you add to the bike.