Fitting a spot light

[Jonle]

I have a full dc set up with a battery.
The 12v dc supply comes from the regulator and connects to the wiring loom and heads off to the headset via the rear brake. I also have a wire connected from that point to the battery. I know I need to get an inline fuse on each of these feeds, just haven’t got them yet. I’m just using a kill switch so no key ignition, which means lights and horn work when the engines not running.
When I come to wiring in a spot light is it just a simple case of just wiring a supply to it through a switch? The only issue I can see is overloading the stator, but with a 35/35w headlight and an led taillight. If I fit a 55w in the spot the max load is going to be just over 90w if I have my foot on the brake whilst beeping the horn. I think the stator is 120w. Or am I missing something?

[coaster]

Unless you have an Electrex or similar stator with 6 lighting coils then you wont be getting any more than between 70 and 90 watts despite what it says on the box. I have a BGM stator on one of my scoots and a scootronic stator on the other. Both run full DC systems and spot lights. First and MOST IMPORTANT thing is dont use it until you have fitted an inline fuse to the battery' I have had two narrow escapes with accidental short circuits whilst riding, the fuse needs to be rated below the capacity of the wiring so around 7 amps max.
Also bare in mind that your spots should only operat with full beam although I doubt an MOT test would look at it. In terms of actually using your DC system, I have an HID headlamp which is also rated at 35 watts and an LED rear light and also power my satnav and iphone charger. At 55mph and above there is plenty of power from the stators,13 plus volts with the lights on and 14.2 with the lights off, I have led bulbs in the spots and they are only used briefly on country lanes so dont really affect anything. BUT at lower speeds especially around town, the stator output falls away and the battery will start to didscharge slowly requiring regular top up from a battery charger.

This is still a worthwhile conversion though, I would never go back to AC lights

[missing lynx]

If I were you I would put a kill switch on your battery circuit to save accidental discharging your battery also a switch for the spot light

[Jonle]

thank you for the info.