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Givi S310 Lights - issues encountered

Alex Blanc

Alex Blanc

Just got it firing!
Joined
Oct 2, 2020
Messages
4
Location
Los Angeles
Has anyone been able to install and successfully use Givi S310 lights on their bike (V9 or otherwise)?

I installed Givi S310 (2x55W) lights on my MotoGuzzi V9. I turn it on as the bike is running and the battery is charging, reading about 14.4V. As soon as I turn on these lights though (the bike is still running), the battery voltage starts gradually dropping, eventually going all the way down to below 12V. Once I turn off the engine, it would not start again as the battery is depleted.

I even disconnected one of the two lights (presumably cutting the power consumption by half?) but still have the same issue, although to a lower degree.

This has been puzzling me for a few weeks now - hoping someone has an idea... Thanks!!
 
These two lights are drawing 110 watts. If only at idle, I can see them draining the battery. What is the wattage output of your V9 charging system? Calculate all the lights on wattage. If you are near capacity then these lights are not for you. See if you can find LEDs that use much less wattage.
 
Thanks John, that makes sense. Admittedly, I don't know how to determine the wattage output of the charging system and the collective wattage of everything that's already connected. I was hoping someone else had these lights and what their experience has been.
 
it's about 268 and barely runs the stock lights. Mine with a LED head and tail light drops from 14.5 at 4000RPM to 13.5 with just heated grips at 50% turn on the gerbing jacket with a heat troller to 50% and it's 12.5. just take them off and save for your next bike.
 
vagrant said:
it's about 268 and barley runs the stock lights. Mine with a LED head and tail light drops from 14.5 at 4000RPM to 13.5 with just heated grips at 50% turn on the gerbing jacket with a heat troller to 50% and it's 12.5. just take them off and save for your next bike.
Click to expand...
Extremely helpful, thank you! I wasn't sure if 'something is wrong' with my battery / alternator /etc. or these lights are just 'not meant to be'. For better or worse, sounds like it is the latter......
 
Yes it probably is the latter. Each lamp uses a compact 55W H3 halogen bulb. Finding a reliable, compact (eg, without a fan or large heatsink) H3 LED replacement that fits within what appears to be a small housing may be problematic.

The V9 probably uses the same alternator as the V7 III which as Vagrant said is 268W.

Fitting an H4 LED headlight bulb increases brightness and reduces power but there isn't much room in the headlight shell so do your research. RY10W LED turn signal bulbs provide necessary brightness but most don't fit in the MG housings. 1157 LED brake/tail light bulb provides useful brightness with reduced power -- make sure you get red for maximum performance although your license plate will look pink but LAPD won't bust you for that (neither will CHP as they have other concerns these days).

Returning to your original question, you were also observing battery drawdown with just one 55W lamp in operation. This is worrisome as the alternator should have sufficient reserve for one lamp. This may need further investigation. Vagrant has BTDT.
 
Bert Remington said:
Yes it probably is the latter. Each lamp uses a compact 55W H3 halogen bulb. Finding a reliable, compact (eg, without a fan or large heatsink) H3 LED replacement that fits within what appears to be a small housing may be problematic.

The V9 probably uses the same alternator as the V7 III which as Vagrant said is 268W.

Fitting an H4 LED headlight bulb increases brightness and reduces power but there isn't much room in the headlight shell so do your research. RY10W LED turn signal bulbs provide necessary brightness but most don't fit in the MG housings. 1157 LED brake/tail light bulb provides useful brightness with reduced power -- make sure you get red for maximum performance although your license plate will look pink but LAPD won't bust you for that (neither will CHP as they have other concerns these days).

Returning to your original question, you were also observing battery drawdown with just one 55W lamp in operation. This is worrisome as the alternator should have sufficient reserve for one lamp. This may need further investigation. Vagrant has BTDT.
Click to expand...

Thank you Bert! I just got a few different versions of LEDs on Amazon. They are all in the 'may be' category in terms of potentially fitting in as you are pointing out but hoping at least one will fit. I am also planning to take the bike to the dealer to check it out - to your point, I was definitely expecting things to work just fine once I took down one of two lamps... but they did not.
 
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