Batteries

[stationone]

RE:2018 Ranger Tug 27: Issue with onboard battery charger and the three battery bank, The battery bank consist of inverter,bow thruster and house batteries. All three batteries load tested bad. The inverter and bow thruster batteries were replaced this past winter. All batteries are aAGM batteries. Laast week we had to replace all three batteries and the battery charger. Any comments?

 

[Submariner]

RE:2018 Ranger Tug 27: Issue with onboard battery charger and the three battery bank, The battery bank consist of inverter,bow thruster and house batteries. All three batteries load tested bad. The inverter and bow thruster batteries were replaced this past winter. All batteries are aAGM batteries. Laast week we had to replace all three batteries and the battery charger. Any comments?

There should be three battery banks. Engine battery, thruster battery, and house battery bank (2 batteries).

If they are all AGM's, double check the battery charger configuration to make sure it's configured to charge AGM (and not Flooded lead acid). Battery testers only test starter batteries. The house bank should be comprised of deep cycle batteries.

Additional comments would require more information about what batteries you've installed, and the battery charger.