I can tell you that the 2000w rating is complete BS and so is that over-rated fuse so ill use 60. im suprised it poped a 40a. haha
watts = volts x amps
w = 13.8 x 60
watts = 828 (in a perfect world.. give or take a few)
I believe the stock alternator is rated at 115a for the v6. Generally, youd want 35a for your vehicles accessories, and at night its more along the lines of 50. so at the minimum of 60 which i based it on, you are right at full capacity. Battery could have dead cells which could be a cause of your problem. if your amp pulls more than 60.. well say 80, thats 1100w, you are maxing out by 25a.
even though i rated it at 13.8v, its realistically lower than that when it reaches your amp, but is pulling 14v+ from the battery.
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