you can drive with lights on ( including high beams ) and AC or heater at max speed and will release the load and voltage system. Just in case of maximun emergency because your home is 1 hour or so far and your batt could not hold the load. There is a solution or an option anyway being external, imposible to deal being internal.
I'll be honest Nacho, this is a tough call. At night, I'd do it with 37 - but with a higher output alt I don't know. I'm not sure even with everything on the voltage will stay under 15.
Daytime is different. I would definately prefer to run on battery for an hour. Ignition takes so little power - could even jumper the ballast if voltage got really low.
