What Nav is saying is there will be a 10% drop across the wire itself. This is
on top of the serious drop caused by the 100 Amp load on the house bank.

Of course, the engine will likely be running, so the load might be partially
offset, depending on how the alternator behaves at low rpm.

BTW, my system has the windlass and inverter (i.e. microwave) off the house
bank. A few times I've noticed the affect of the voltage drops, especially if
it goes below 12, but I've never been "spiked."



"DSK" wrote in message
...
Nav wrote:
The voltage drop will be at the motor, not the house battery end.

If you have a 10% voltage drop at the motor, there will be a noticable
drop at the battery terminals too.

Ever notice the way an ammeter swings when you turn the starter? Hint:
very few cars wire the ammeter sensor leads to the starter terminals.

DSK