300 amps alternator Prostar Cummins ISX

[Nostalgic]

I ran a 160 amp "$300" Bosch alternator for years with 4 starting/4 deep cycle batteries for electric APU with a simple voltage disconnect, and then moving to 4 agm/4 lifepo4 with a dc/dc charger. I upgraded this year to a brushless 240 amp Delco, 8600338, to give me a little quicker charge for <$1k. Pays to shop around and see if your local dealer will price match. All depends on how long you drive daily if it's enough to recharge and what kinds of loads you have while driving.