Author Topic: Fog light - max draw?  (Read 478 times)

Offline Haioku_Mantan

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Fog light - max draw?
« on: July 29, 2025, 01:27:57 AM »
I have a pair of 10W and 24w spot/flood LED's I wanted to put on.
Max draw would be about 1.668A for the 2x10's and 4A for the 2x24's (Given that we calculate the draw by dividing the wattage/voltage)

Would it be overtaxing the Norge alternator/charging system to mount all 4 and light up the night?
Current:
'07 Norge

Previous:
'07 Honda Deauville
'12 KTM SuperMoto
'94 ZZR 400
'92 ZZR 1290
'92 Bandit 250

Offline Kiwi_Roy

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Re: Fog light - max draw?
« Reply #1 on: July 29, 2025, 01:54:29 AM »
What is the rating of the Norge Alternator?
I run a pair of 10W LED spots on my V7III Special, they make the bike more visible for other road users

One nice thing about LEDs, they are maximum brightness with only 9 Volts or above so its ok to have some Voltage drop in the wiring.
17 V7III Special
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Offline Haioku_Mantan

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Re: Fog light - max draw?
« Reply #2 on: July 29, 2025, 02:10:15 AM »
What is the rating of the Norge Alternator?
I run a pair of 10W LED spots on my V7III Special, they make the bike more visible for other road users

One nice thing about LEDs, they are maximum brightness with only 9 Volts or above so its ok to have some Voltage drop in the wiring.

They say 550W at 2,000 rpm
Current:
'07 Norge

Previous:
'07 Honda Deauville
'12 KTM SuperMoto
'94 ZZR 400
'92 ZZR 1290
'92 Bandit 250

Offline kingoffleece

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Re: Fog light - max draw?
« Reply #3 on: July 29, 2025, 09:47:14 AM »
You have a volt meter built into the dash.  keep a weather eye on it.
I've had other motorcycles that should have been ok but at low rpm did not put out enough juice.
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Offline PeteS

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Re: Fog light - max draw?
« Reply #4 on: July 29, 2025, 09:55:17 AM »
Assuming you install an on/off switch, just turn them off in stop and go traffic. Shouldn’t be an issue on the highway.

Pete

Offline Kiwi_Roy

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Re: Fog light - max draw?
« Reply #5 on: July 29, 2025, 10:23:20 AM »
They say 550W at 2,000 rpm
There you go then try it out but be prepared.
Have a switch on the bars and turn it off under 2000 revs
When my V7III Special was having alternator problems I would turn off my heated gear well before I knew i was going to stop so the battery had a chance to recover
Lets face it overloading a motorcycle electrics is risky business
the 2 10 Watt units should be ok.
« Last Edit: July 29, 2025, 12:33:17 PM by Kiwi_Roy »
17 V7III Special
76 Convert

Moto Guzzi - making electricians out of riders since 1921

Offline Haioku_Mantan

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Re: Fog light - max draw?
« Reply #6 on: July 31, 2025, 07:35:43 PM »
Assuming you install an on/off switch, just turn them off in stop and go traffic. Shouldn’t be an issue on the highway.

Pete

I checked the other day when riding and it was showing 12.2 with not much difference over 2000rpm or below.
Mind you this is without any accessories or additional lighting installed.

The previous owner was a bit of a tinkerer but in true SG fashion half-asses the wiring. He mentioned he created an additional direct link from the alternator to the battery with an inline fuse which I see but haven't traced yet. I'm going to get a PC-8R from Eastern Beaver and wire that in, whilst cleaning up all the additional loose wiring under the seat before adding any lights or farkles.
Current:
'07 Norge

Previous:
'07 Honda Deauville
'12 KTM SuperMoto
'94 ZZR 400
'92 ZZR 1290
'92 Bandit 250

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