hi playbyte.
assuming you have been on hookup
have you got your charger, on the mains/powersupply/charger unit, turned on.
i dont know the mcCloius setup but you should be able to turn on/off the charger unit.
on my kontiki the unit has a rocker switch on top to turn the charger on/off. this also has a fuse which on mine was not making a contact in its carrier thus no charge.
i think the red light will just be a visual warning that the 12v power is turned on.
hope this helps.
john.