Modern Vespa

All leader engines 125-150-200cc 200 watts 16 amp @ 4000 RPM

you have some extra to run heated gear.....like a jacket liner and a pair of heated gloves or maybe 2 heated vests.........use heat controllers....thermostats.

The GTS (at speed) will produce 24 amps when cold (approx. 307 watts) and 21 amps when warm (approx. 269 watts).

We run 2 Gerbing Heated jacket liners and 2 sets of gloves with the dual control thermostats for each, so the gloves and jackets can be contolled separately. We also never turn anything on until we're moving. Switches are OK but are always giving you FULL power and always need to be turned off when stopped, even at a stop lights.

The alternator can handle the heated gear. We're careful when we turn our stuff on and always adjust it lower when warmed up. Turning the thermostats down uses less power form the scooter electrical system.

With 26k on my GTS now I'm still on the original battery.

Hope that helps,

There we go! That's what I was looking for. Thanks. If the ~8 amps (96 watts) leftover for accesories is correct then there is not a lot of margin for lights and heated gear. My Gerbing jacket liner draws 55 watts. Maybe some extra for gloves but that's about it.