Hi all, I.know it's a weird thread but hopefully it'll soon make more sense.
Anyone had any issues with dual battery systems? Got a d40 navara in which I have installed a red arc smart start isolator and agm batteries in the tray. All has been going good running rear lights and fridge until I decided to help charge the batteries via the caravan system which was plugged into 240v. I had wired the supply from the car to secondary batteries via an andersen plug so it could be disconnected and Andersen charge lead from caravan could be ran directly to rear batteries without charging crank battery or interfering with and vehicle electronics. This worked fine, and left overnight to charge. I disconnected lead from caravan and reconnected car dual battery plug the next morning and drove about 3km without van no problems, fridge running for about 2 hours. Got back to van and hooked up, 12 pin too for fridge aes and when I started car there was a random clicking noise coming from the engine bay. Inspection found it to be coming from the alternator, so I disconnected dual battery Anderson plug and it went away. Is it possible that the caravan battery management system overcharged agm batteries causing the alternator to have an overcharge fault? Thinking that although with the fridge running for 2 hours it would have drawn from this charge. Multimeter is buried in the back of the ute and with daylight hours depleted I was found to wait until tomorrow to further investigate. Caravan battery system set to agm as van battery is and charging no higher than 14.4v which would be acceptable but why only fault when caravan plugged in? Any ideas?
Anyone had any issues with dual battery systems? Got a d40 navara in which I have installed a red arc smart start isolator and agm batteries in the tray. All has been going good running rear lights and fridge until I decided to help charge the batteries via the caravan system which was plugged into 240v. I had wired the supply from the car to secondary batteries via an andersen plug so it could be disconnected and Andersen charge lead from caravan could be ran directly to rear batteries without charging crank battery or interfering with and vehicle electronics. This worked fine, and left overnight to charge. I disconnected lead from caravan and reconnected car dual battery plug the next morning and drove about 3km without van no problems, fridge running for about 2 hours. Got back to van and hooked up, 12 pin too for fridge aes and when I started car there was a random clicking noise coming from the engine bay. Inspection found it to be coming from the alternator, so I disconnected dual battery Anderson plug and it went away. Is it possible that the caravan battery management system overcharged agm batteries causing the alternator to have an overcharge fault? Thinking that although with the fridge running for 2 hours it would have drawn from this charge. Multimeter is buried in the back of the ute and with daylight hours depleted I was found to wait until tomorrow to further investigate. Caravan battery system set to agm as van battery is and charging no higher than 14.4v which would be acceptable but why only fault when caravan plugged in? Any ideas?