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FJR Motorcycle Forums
Technical & Mechanical Problems
How to check R/R voltage on a Gen II?
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<blockquote data-quote="Fred W" data-source="post: 1313931" data-attributes="member: 3828"><p>The current from the Alternator through the R/R is not just recharging the battery. It is also providing <em>all of the power</em> needed to run the bike and any and all accessories that you have added to the bike. You need to size any fuse or breaker and the wires that carry the current to accommodate your full expected load current.</p><p></p><p>Do not be confused into thinking the bike is running off the battery and we are just recharging that. The battery is just a very large capacitor. It is an electric power storage device and is only really "used" or supplying power when the bike is not running, i.e. to start the bike.</p><p></p><p>Once the bike is running the voltage from the alternator is higher than the battery voltage, so the bike runs off that power while simultaneously recharging any power lost from the battery running the starter motor. Once the battery is fully charged it just sits there. THat is unless you place so much of a load (current demand) on the system that the alternator output begins to sag. When the alternator voltage sags below the battery voltage you start to discharge the battery and it will not be able to start the bike the next time you require it to.</p></blockquote><p></p>
[QUOTE="Fred W, post: 1313931, member: 3828"] The current from the Alternator through the R/R is not just recharging the battery. It is also providing [I]all of the power[/I] needed to run the bike and any and all accessories that you have added to the bike. You need to size any fuse or breaker and the wires that carry the current to accommodate your full expected load current. Do not be confused into thinking the bike is running off the battery and we are just recharging that. The battery is just a very large capacitor. It is an electric power storage device and is only really "used" or supplying power when the bike is not running, i.e. to start the bike. Once the bike is running the voltage from the alternator is higher than the battery voltage, so the bike runs off that power while simultaneously recharging any power lost from the battery running the starter motor. Once the battery is fully charged it just sits there. THat is unless you place so much of a load (current demand) on the system that the alternator output begins to sag. When the alternator voltage sags below the battery voltage you start to discharge the battery and it will not be able to start the bike the next time you require it to. [/QUOTE]
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FJR Motorcycle Forums
Technical & Mechanical Problems
How to check R/R voltage on a Gen II?
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