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  • Post in thread: Charging issue with thermal circuit breaker? SOLVED

    Bypassed the breaker and the charger output dropped from 14.4v to 13.9v but that 13.9v was carried all the way to the battery. The battery voltage drops to 13.5v when I turn the van off. I assume the 13.9v is the "average" of the battery state of charge plus the 14.4v charge current? And...
  • Post in thread: Resettable Circuit Breaker - Voltage Drop

    I'm using a 50a T Tocas on the output side of my 40 DC/DC charger and seeing a drop of nearly 1 volt at the breaker. So instead of charging at 14.4v, I'm seeing 13.5v. I assume I'll be having the same issue with my Victron 100/30 as it has a 40a Tosca breaker on it. I assume this means I'll...
  • Post in thread: Charging issue with thermal circuit breaker? SOLVED

    Measured at the studs and wire terminals. Same 13.9v at various points of the system since bypassing the circuit breaker. Pulling 14.39 volts at the input side of the DC/DC charger and it's producing the rated 40 amps. Windy Nation 4 AWG copper wire. The negative is terminated on the load...
  • Post in thread: Charging issue with thermal circuit breaker? SOLVED

    Do I have a negative wire voltage drop or am I reading the battery voltage? Hence the questions below: These questions are important to me because I'm not one to chase a problem until I'm sure it exists. Should I really be reading 14.4v on the battery side when the battery is currently at...
  • Post in thread: Charging issue with thermal circuit breaker? SOLVED

    With the breaker bypassed the output of the charger gradually rose to 14.35v as the battery voltage gradually rose to 14.35v. I think I might have answered my own question. I'm no electronic wiz kid, but it looks like the measured voltage output of the charger is based on the current SOC on...
  • Post in thread: Charging issue with thermal circuit breaker? SOLVED

    I'm using a 50a T Tocas thermal circuit breaker on the output side of my 40 DC/DC charger. I am getting a drop of nearly 1 volt at the breaker. So instead of charging at 14.4v, I'm getting 13.5v max. (I assume I'll be having the same issue with my Victron 100/30 as it has a 40a Tosca breaker on...
  • Post in thread: Charging issue with thermal circuit breaker? SOLVED

    It is the breaker. I measured 14.4v on the input and 13.5v on the output of the breaker. I'm sure it will charge at 14.4v if I bypass it. Is this a faulty breaker? A common problem with thermal breakers? Should I get a different breaker or fuse? Do I really need a breaker on a 12" run...
  • Post in thread: Charging issue with thermal circuit breaker? SOLVED

    I put the breaker in question back into service and I'm now seeing 14.34v to 14.35v at all points in the system. I believe I was mistaken when I thought the breaker was causing a voltage drop. I think I was simply reading the battery voltage on that side of the breaker and mistook that as my...
  • Post in thread: Resettable Circuit Breaker - Voltage Drop

    I created another thread for this issue but I think I figured out that I was confused by my readings and I don't actually have a problem. Please comment in that thread if you have anything to add. Thanks...
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