Hello all genuises.
I have a scenario I will try my best to explain, but if you dont understand please let me know and I will try to clarify.
I drive a 4 litre Petrol Prado towing an Australian off road camper. Camper has 2 calcium batteries 120a/h each (240a/h total). Prado has an aux 4X4/Truck calcium battery, I think its 70a/h. I have a TJM IBS dual battery isolator seperating the starting battery from the aux/camper batteries. With this isolator you can manually parrallel all batteries together.
I was camping at a powered site this weekend with my CTEK 25A charging my camper batteries which will power an Evakool 50ltr fridge, lights and Water pump. I also had my car aux battery connected to the camper via an Anderson plug. I was listening to music from the car stereo (powered by starting battery) most of the day and thought that as I am connected to 240V with a 25A CTEK charger, why dont I charge my car batteries (both starting and aux). I could do this electrically by manually closing isolator to connect all 4 batteries together by the TJM IBS Controller.
So CTEK output was 14.5 volts in recondition mode and this volt was checked at camper batteries and Anderson plug from trailer. Car was still electrically connected to camper via Anderson Plug. Now the Voltage checked at both car batteries was 12.17 volts (car engine NOT running). Why I thought.
Anderson Plug wiring is off heavy gauge, I think 6 or 8 gauge. Both Car Batteries have a Projecta Fused Positive terminal post on them. They have a red cover on them and allow you to have 3 fused outputs straight of the positive terminal battery post. (Dont know if you know what Im talking about here, but I dont think its important.)
I electrically disconnected the positive terminal of the Anderson plug straight off the Aux battery post and voltage checked at 14.5V. And then when you connect it too the Aux Battery terminal post, this battery and the starting battery are again reading 12.17V.
With Camper and car electrically disconnected the car batteries are reading 12.17V with the 2 car batteries parralleled.
Why?? Shouldnt all batteries be reading 14.5V in this scenario.
Can anyone explain this. Could both car batteries have an internal resistance (a failed cell)
Would love an explaination, so please if you have a theory or better still, an answer to this problem, please take the time to jot it down. Its GMF'd
Tiger
I have a scenario I will try my best to explain, but if you dont understand please let me know and I will try to clarify.
I drive a 4 litre Petrol Prado towing an Australian off road camper. Camper has 2 calcium batteries 120a/h each (240a/h total). Prado has an aux 4X4/Truck calcium battery, I think its 70a/h. I have a TJM IBS dual battery isolator seperating the starting battery from the aux/camper batteries. With this isolator you can manually parrallel all batteries together.
I was camping at a powered site this weekend with my CTEK 25A charging my camper batteries which will power an Evakool 50ltr fridge, lights and Water pump. I also had my car aux battery connected to the camper via an Anderson plug. I was listening to music from the car stereo (powered by starting battery) most of the day and thought that as I am connected to 240V with a 25A CTEK charger, why dont I charge my car batteries (both starting and aux). I could do this electrically by manually closing isolator to connect all 4 batteries together by the TJM IBS Controller.
So CTEK output was 14.5 volts in recondition mode and this volt was checked at camper batteries and Anderson plug from trailer. Car was still electrically connected to camper via Anderson Plug. Now the Voltage checked at both car batteries was 12.17 volts (car engine NOT running). Why I thought.
Anderson Plug wiring is off heavy gauge, I think 6 or 8 gauge. Both Car Batteries have a Projecta Fused Positive terminal post on them. They have a red cover on them and allow you to have 3 fused outputs straight of the positive terminal battery post. (Dont know if you know what Im talking about here, but I dont think its important.)
I electrically disconnected the positive terminal of the Anderson plug straight off the Aux battery post and voltage checked at 14.5V. And then when you connect it too the Aux Battery terminal post, this battery and the starting battery are again reading 12.17V.
With Camper and car electrically disconnected the car batteries are reading 12.17V with the 2 car batteries parralleled.
Why?? Shouldnt all batteries be reading 14.5V in this scenario.
Can anyone explain this. Could both car batteries have an internal resistance (a failed cell)
Would love an explaination, so please if you have a theory or better still, an answer to this problem, please take the time to jot it down. Its GMF'd
Tiger
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