Join Date: Oct 2012
Location: North Carolina, US
The role of our battery is to first start the engine.
Then the battery actually powers everything once it's running.
The alternator does provide power but in an indirect way.
Power from the alternator flows up to the rectifier, which converts the power from AC to DC, then the regulator steps the voltage down to the usable range... around 14 volts average.
That power then flows to the battery.
The battery then powers everything.
All the lights and ignition system take their power directly from the battery whether the engine is running or not.
When the engine is running, as the lights and ignition uses the battery's power, the regulator monitors the battery's voltage and kicks in as needed to maintain the battery's charge level to be able to restart the engine and keep a constant supply for everything to operate.
If the battery's voltage drops below a certain point because it's failing and cannot accept the power coming from the alternator while the engine is running, the ignition coils literally can't provide enough current to fire the spark plugs reliably... because the battery is unable to provide the coils with the power they demand.
Our bike works slightly different than a vehicle..... Have you ever had a vehicle that the alternator has stopped putting out any power?
The vehicle is then running off of nothing but the battery... until the battery goes dead.
Cars use their battery just to start, then the alternator takes over to power everything.
Our bike uses the battery to power everything and the alternator just keeps it charged as the power is used.
Last edited by one_evil_monkey; 3-20-2017 at 2:30 AM.