Low Battery Voltage alarm - starter clicks once

[blue_bayou]

I've got triple 2013 DF 300's. When attempting to start the stbd motor, I get one click from the starter and then get a Low Battery Voltage code and alarm. Brand new Odyssey Extreme battery and good voltage to and from the battery switch. I had this problem several times before, but then it corrected itself. Now it is consistent. What should I check next?

[STxFishing]

Maybe the white power wire at battery terminal?

[artdf175]

have not heard of this related to the white wire
double check the battery voltage, something may have run the voltage down
aldo check the battery terminals - make sure there is no corrosion

[tsturm]

have not heard of this related to the white wire
double check the battery voltage, something may have run the voltage down
aldo check the battery terminals - make sure there is no corrosion

Clean & tight at both / all ends (inc. at any sw or relay)