needed high amp alternator

Different perspectives. I am OK w/ 11.75 V w/ the fans running as long as the battery stays charged. The battery is discharging under peak load, but I doubt that decreases its life. Some people expect the alternator to supply the peak load, meaning voltage holds at 14.3 V even with everything on. That would require a larger alternator. The main downside people see from the voltage dropping is that the (factory) headlights may dim slightly. In the near future, we may all have LED bulbs which regulate the voltage, so shouldn't dim. HEI bulbs may have regulators. For those old enough to remember 2 cycle 1970's motorcycles, many didn't even have a battery and their headlamps would vary greatly as they revved the engine at stoplights, which one had to do to keep them from stalling.