Quote Originally Posted by Leebo View Post
At idle, the dash gauge says I’m getting ~14v but as I start turning on switches/pumps, the voltage drops to sub-13v. At higher rpms, the voltage returns to ~14v w/ all 3 pumps running. My question is whether this is normal. A search of the forums indicates my alternator should generate 70amps at idle but this is clearly not the case (assuming 3 pumps draw ~45 amps).
Normal and it doesn't take much engine speed to get it back up to 14V, even about 1000rpm does it for me maybe just a bit more with 3 running. If I'm sitting still, I put it in neutral and bump the throttle a bit.