Reversing the eco-charger could have the unintended consequence of over-charging the start battery, leading to a premature death usually when you will most need it.
Reversing the charge scheme (putting the Eco-charger on the house bank) would severely limit the rate at which the house bank would charge.
The purpose of the Eco-charger is to ensure the start battery is not cooked as without it, the start battery would be charged at the same rate as the house bank. If, as most of us do, you have a large house bank, large charging source and a somewhat depleted house bank, the net flow of current into the house bank would be at a rate such that the start battery (presumably not equally discharged) would suffer.
In most respects, every boat should be able to start off a house bank if necessary. There is nothing sacred about a fully charged start battery as long as you have a means of switching over to a house bank for starting when needed.
Last edited by k1vsk; 10-13-2008 at 03:35 PM.