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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Battery weak after ride - C Rapide
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<blockquote data-quote="Monkeypants" data-source="post: 47146" data-attributes="member: 2708"><p>danno, is your existing battery topped up with fluid?</p><p>It sounds as though you have quite a high draw on your charging system, though it depends greatly on the type of lighting used. Your ignition draw is going to be quite high with Lucas Rita, I believe it is around 30 watts at idle. You mention that you always run your headlight during the day. If it is a 55 watt Halogen like my main headlight, then you have 85 watts so far. Add to this another 15 watts or so for incandescent bulbs in the tailight and two speedo lights (big speedo)</p><p></p><p>This gives a total of 100 watts dead load on the charging system. While sitting idling in traffic all of this power is being pulled out of your battery. In fact power is being removed from your battery all the way up to balance speed, which might be 50 mph with this load. So the only time the charging system can build the battery voltage back up is when you are crusing above 50 mph. If you are on slow roads or riding in congested areas, you might not be spending much time riding at speeds that will charge the battery.</p><p> </p><p>You can (and may have already) reduce this electrical load by using a pilot light for daytime riding. Paul Goff sells LED pilot light bulbs that draw next to nothing for power and are quite bright. Same with the speedo bulbs and tailight, if they are all in led then this will reduce the draw quite a bit. </p><p>So it makes a big difference if you have a bike fitted with al LED lighting and low draw EI ignition such as Pazon (7 watts at idle for standard Pazon) or zero draw such as original mag or BTH.</p><p>Your total daytime electrical load could be down around 10 watts with lights and ignition on or as high as 100 with the first scenario.</p><p>Obviously with just 10 watts of load your charging system will be working on the plus side at a much lower speed and for a much greater percentage of your ride, so this will be reflected in the battery voltage at the end of ride.</p></blockquote><p></p>
[QUOTE="Monkeypants, post: 47146, member: 2708"] danno, is your existing battery topped up with fluid? It sounds as though you have quite a high draw on your charging system, though it depends greatly on the type of lighting used. Your ignition draw is going to be quite high with Lucas Rita, I believe it is around 30 watts at idle. You mention that you always run your headlight during the day. If it is a 55 watt Halogen like my main headlight, then you have 85 watts so far. Add to this another 15 watts or so for incandescent bulbs in the tailight and two speedo lights (big speedo) This gives a total of 100 watts dead load on the charging system. While sitting idling in traffic all of this power is being pulled out of your battery. In fact power is being removed from your battery all the way up to balance speed, which might be 50 mph with this load. So the only time the charging system can build the battery voltage back up is when you are crusing above 50 mph. If you are on slow roads or riding in congested areas, you might not be spending much time riding at speeds that will charge the battery. You can (and may have already) reduce this electrical load by using a pilot light for daytime riding. Paul Goff sells LED pilot light bulbs that draw next to nothing for power and are quite bright. Same with the speedo bulbs and tailight, if they are all in led then this will reduce the draw quite a bit. So it makes a big difference if you have a bike fitted with al LED lighting and low draw EI ignition such as Pazon (7 watts at idle for standard Pazon) or zero draw such as original mag or BTH. Your total daytime electrical load could be down around 10 watts with lights and ignition on or as high as 100 with the first scenario. Obviously with just 10 watts of load your charging system will be working on the plus side at a much lower speed and for a much greater percentage of your ride, so this will be reflected in the battery voltage at the end of ride. [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Battery weak after ride - C Rapide
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