Which one do I believe?

[Raptor Dave]

The inverter readout on the inside.....
The in-command readout on the app.....
The Victron readout on my phone.....

All 3 of these give a what I presume is the current stage of the battery voltage.
All 3 of them always have a different number.

Which one is the most accurate?

 

[jasin1]

The inverter readout on the inside.....
The in-command readout on the app.....
The Victron readout on my phone.....

All 3 of these give a what I presume is the current stage of the battery voltage.
All 3 of them always have a different number.

Which one is the most accurate?

i would think the victron is the most accurate, thoroughly tested piece of equipment but if i remember correctly the displayed info is only as good as the user supplied input that tells it what kind of batteries and reserve hours you are starting with when you install it…the inverter is probably equally or slightly less correct and finally the incommand engineering is on par with a two dollar alibaba purchased battery monitor

 

[NH_Bulldog]

There are too many setup variables involved. Close is about all you can expect. Right now my shunt says 13.68 volts and my solar smart controller says 13.66 volts. Watching in realtime, the numbers change in tandem by equal amounts. It isn’t enough difference that I want/need to sync them. I don’t have InCommand.

 

[JRTJH]

EVERY electrical monitoring device has an acceptable range. For some devices, that range might be 12.6VDC +/- 0.03 volts while another device monitoring the same battery might have an acceptable range of 12.6VDC +/- 0.3 volts (that's 10 times wider range both positive and negative for a spread of over half a volt) and both devices are "working correctly".....

We had a number of missile "accepted range variations" that were MUCH tighter than the aircraft accepted range variations. What that did is add confusion to someone trying to "match set up procedures" but in reality, did not change the fact that both were acceptable settings and with the ENTIRE system attempting to shoot down a target 15 meters wide, whether the missile tracked at 3" variance from 0 and the aircraft tracked at 6" from 0 was of no consequence when all the "SYSTEM" had to do is get within 30 feet.

It's pretty much the same with your solar system when you consider that the battery is storing 100 amps (1360 watts) of energy and the solar panel is providing power to the controller that is providing power to the charger which is replenishing the battery charge. Whether it charges to 1360 watts or to 1361 watts or to 1358 watts, all are "within the acceptable range".... It's the same with the settings to monitor that system. One monitor is set slightly different from the next and NONE will read "exactly the same" but all are within their correct adjustment.

Step back, consider making a margarita and while making it, don't count the drops of tequila, just the jigger marking.... Same principle applies to the grains of salt on the rim.... "Acceptable is close enough"

 

[Raptor Dave]

Step back, consider making a margarita and while making it, don't count the drops of tequila, just the jigger marking.... Same principle applies to the grains of salt on the rim.... "Acceptable is close enough"

Thanks for the explain.
There is no measuring the tequila when a Davearita is being made! :whistling:

 

[JRTJH]

Thanks for the explain.
There is no measuring the tequila when a Davearita is being made! :whistling:

Same with mine when I become a "mixologist".. That said, if I were to be "held to the same standards as those electronics adjustments, with the amount I pour into the glass, I'd have the meters pegged and all the magic smoke boiling out the vent holes in the charge controller case !!!!!

 

[GlasNav]

Let's see, you are observing a 2 one hundredth of a volt difference, if these readings were taken with a conventional nondigital volt meter, you wouldn't even notice any differences or fluctuations.
Don't get consumed by the gadgetry, remember when we use to feel phantom buzzing from our cell phones while in silent mode? This obsession with the readouts from solar and LiFePo installations can be the same! My neighbor is addicted to his, I thought he was watching his stock portfolio all the time, nope, glued to the Victron display.