If all battery switches are turned to 'off'..

[ramblinrod]

Originally Posted by skipmac

No correct. All three battery banks are being charged since, according to the diagram, all three banks are connected. So the wind charger output can be connected to the + of any bank and charge all three.

No doubt that all 3 sets of 6Vdc batteries are being charged by the wind generator (assuming it is operating properly), however, group C is receiving preferential charge current, as it is seeing the least voltage drop due to the wiring connections directly to it.

The others that have posted that it would be better to move one of the wind generator regulator connections to better equalize the charge current among the batteries, are correct.

For proper SOC reporting, the negative wind generator regulator terminal should be moved to the Xantrex coulomb counter shunt distribution panel side, and the wind generator regulator positive terminal moved to produce the most equidistant battery bank connections.

[dbrandt6]

Skipmac... the starter battery is independent. I think you are probably correct.... age plus not running the engine since April 25 was the problem. Already made an arrangement to have my buddy start her up next season once a week while in the water before she goes on the hard.

[skipmac]

Originally Posted by ramblinrod

No doubt that all 3 sets of 6Vdc batteries are being charged by the wind generator (assuming it is operating properly), however, group C is receiving preferential charge current, as it is seeing the least voltage drop due to the wiring connections directly to it.

The others that have posted that it would be better to move one of the wind generator regulator connections to better equalize the charge current among the batteries, are correct.

This is the common thinking but a previous discussion and some comments from an EE that designs builds marine electrical equipment has caused me to revise my opinion on this issue. Assuming the cables between the pairs in the three banks are 1) properly sized 2) reasonably short 3) clean, solid connections then the voltage drop between banks is insignificant.

Example. Battery banks connected with 12" of 1/0 cable with a 50 amp current the voltage drop in the cable is 0.01 V and insignificant amount. Longer cables or smaller cables only add another couple hundredths of volts drop. Not enough to impact charging at all. Of course it doesn't hurt to split the + and - cables across a bank but it doesn't seem worth making an awkward wiring configuration to do it.

Originally Posted by ramblinrod

For proper SOC reporting, the negative wind generator regulator terminal should be moved to the Xantrex coulomb counter shunt distribution panel side, and the wind generator regulator positive terminal moved to produce the most equidistant battery bank connections.

The diagram shows the wind charger's current is not going through the Xantrex monitor so only amps out to the boat are being metered. If the OP wants to show amps in and out of the battery banks then he should move the wind charger - cable to the other side of the shunt.