Measuring V loss during charging
I know that a discharged battery can pull down the voltage at the charger. I was trying to measure voltage loss in my converter wiring, switches, etc. The two 105 AH batteries were 12.13v prior to ...
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You are way over thinking the issue. The math has been done and experience for the last 40 yrs shows me nothing new. As the battery internal resistance raises as it becomes charged the current will drop and the voltage will go up. Simple ohms law. You have no major issues.
This is a very simple thing to visualize if you pretend you are filling a bucket with marbles. You can fill it fast or slow and the size of the pipe letting the marbles in makes a difference to a point. One should not be in a major hurry to fill deep cycle batteries. They are designed to take 10-15 amps over a long time. These are not starting batteries that empty their contents quickly starting a huge engine and then the alternator fills them up fast. These batteries need to be loved and appreciated and not murdered as most RV batteries are.
IF you have a fuse holder that is dropping voltage it needs to be replaced or repaired. It should have a DC short and not represent any resistance. In theory of course. A heavy current across any connection is going to create the possibility of heat. But if one is getting warm it needs attention.
Since you are bent on chasing every ounce of energy be sure to take a dremel tool with a sandpaper attachment to every connection. I do this and it really makes for a great connection.
This is a very simple thing to visualize if you pretend you are filling a bucket with marbles. You can fill it fast or slow and the size of the pipe letting the marbles in makes a difference to a point. One should not be in a major hurry to fill deep cycle batteries. They are designed to take 10-15 amps over a long time. These are not starting batteries that empty their contents quickly starting a huge engine and then the alternator fills them up fast. These batteries need to be loved and appreciated and not murdered as most RV batteries are.
IF you have a fuse holder that is dropping voltage it needs to be replaced or repaired. It should have a DC short and not represent any resistance. In theory of course. A heavy current across any connection is going to create the possibility of heat. But if one is getting warm it needs attention.
Since you are bent on chasing every ounce of energy be sure to take a dremel tool with a sandpaper attachment to every connection. I do this and it really makes for a great connection.
