Vannautical engineer
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- Feb 5, 2021
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I have a DC to DC charger, specifically the Renogy DCC50S that has a solar controller in the same unit.
My question is, if I have the vehicle running, and therefore power from the alternator is going into the charger, and I have something drawing power out on the house battery side of the charger, will the charger provide power directly to the device that is drawing power, or will it be drawing power out of the battery itself, and then the battery will get topped up by the charger once it's drawn down a little bit?
Now that I type this out and think about it, I think I might have answered my own question, but I'm still not 100% sure. I would think that the charger is just supplying out whatever current is demanded on the house battery circuit, and the charger really has no knowledge or ability to provide power specifically to either the battery or a device that is using power. So I guess the device would just be powered directly off of the charger in this case, and the battery is just not really part of this whole exchange of power at all since the charger is probably keeping the voltage of the whole system slightly higher than the battery would on its own anyway?
Only reason I'm asking is that I'm wondering if I install accessories on the house battery circuit that will primarily be used when the vehicle is running, does that mean my house battery is constantly getting a little bit of a cycle and then replenished all the time when I'm driving? But I'm thinking that no, it wouldn't be.
My question is, if I have the vehicle running, and therefore power from the alternator is going into the charger, and I have something drawing power out on the house battery side of the charger, will the charger provide power directly to the device that is drawing power, or will it be drawing power out of the battery itself, and then the battery will get topped up by the charger once it's drawn down a little bit?
Now that I type this out and think about it, I think I might have answered my own question, but I'm still not 100% sure. I would think that the charger is just supplying out whatever current is demanded on the house battery circuit, and the charger really has no knowledge or ability to provide power specifically to either the battery or a device that is using power. So I guess the device would just be powered directly off of the charger in this case, and the battery is just not really part of this whole exchange of power at all since the charger is probably keeping the voltage of the whole system slightly higher than the battery would on its own anyway?
Only reason I'm asking is that I'm wondering if I install accessories on the house battery circuit that will primarily be used when the vehicle is running, does that mean my house battery is constantly getting a little bit of a cycle and then replenished all the time when I'm driving? But I'm thinking that no, it wouldn't be.