Radical Sportscars SR3 XX, Owner'S Manual, Page: 36 / 56

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8.2 CHARGING ISSUES
Your SR3 should be charging between 13.5-14.5 V when running on circuit. If you see it running below this,
me sort of issue with the charging of your car. After each run it is important to check the
eing in
below guide on how to diagnose the problem and deciding on the solution. When checking the car is
charging, make sure the RPM is held above 3000rpm
For a 1500 SR3 an additional battery is fitted in the sidepod to allow for 24v starting to assist with the
increased compression ratio. This additional battery is only discharged when the starter is depressed, aside
from a physical wiring fault nothing else will discharge it. It is recharged using a charging module (silver box
under passenger side of dash).
On this module you will find two lights, power (green when on) and charging (orange when charging). If no
lights are showing check connections and consider replacing the module. If the charging light is not showing
check the condition of the side pod battery and consider replacing.
The dash and data can only show the voltage of the engine bay battery, this is charged by the stator on the
engine. Problems with this battery can be diagnosed by following the below chart.
B a t t er y
Check the charging
fuse in sub loom
Trickle charge the battery, consider replacing with
a new known good battery.
Testing with a multimeter, is
it above 9V? Check for
deformation
Check/Replace
Loom
Check the
Charging Relay
Check for AC
voltage from Stator
Check/Replace
Rectifier
Try new battery
No Yes