Gidday Staffo,
There is a formula to work out whether your accessories are greater than what your elect system can handle. I.E The no of watts divided by the voltage equals the amperage drawn from the system. I should imagine the phone would be very small but the music system could be another story and the driving lights wattage is easy to work out. Triumph should issie a spec on what the charging system can handle-i.e alterator output in amps. Must be a tad cold riding over your way!!!
