Where did you measure the voltage ?
We don't have enough information yet to make any decisions about alterations.
My suggestion would be to ditch the fans.
Good plan.
Another way to test the charge state of the battery is as follows:
Do a slow charge. 2 to 3 amps. If its a trickle - go overnight. If its an automaticly adjusting charger run it until it says fully charged.
Connect the voltmeter to the battery and unless you have really long leads, have a helper watch the meter while the engine is cranking. If it drops below 9.5 Volts the battery is weak.
