Battery SOC Low - Voltage Normal
Hi All. I'm new here so go easy on me. I've Googled for hours but can't find any solid answers. My setup is in my signature. So here's my issue.... Whether plugged into shore power, running my ...
Forum Discussion
5erToyHauler wrote:
- My display measures SOC as well as Voltage. It does take into account the battery capacity
That voltage doesn't seem to drop abnormally when loads are placed on the system. It's just the SOC that does.
There are only TWO ways to know (or estimate) the state of charge:
Testing the specific gravity
OR
Measuring the voltage after a good rest or under a very small (known) load.
So.....if the "display" doesn't have a probe into the acid (unlikely), then all it REALLY knows is voltage.
The ONLY way for it to make an educated guess at SOC is go measure the voltage while a known load is applied. It can't do that when ANYTHING else is drawing power: NOTHING.
Bottom line: your SOC numbers are varying wildly because the test conditions aren't right or the "display" has gone haywire.
To repeat (this is important): The "display" can't give you an accurate SOC number under varying loads.
The more I read this thread, the more I think that the SOC number you are seeing is really more like a "time remaining" approximation assuming that the current load continues as is.
I think you should ignore that fake SOC number and just watch the voltage and use the provided chart. It is similar to the one I have and assumes no load or a real small one.
