Battery power/charging gauge accuracy

Joined
Feb 14, 2021
Posts
4,518
Likes collected
10,289
Location
Milton Keynes, UK
Funster No
79,219
MH
Burstner Lyseo 727G
Exp
3 years 30,000 miles UK and Europe.. Campsites and off Grid.
When I got the van it had one Leisure battery . Since then I have added two more. Same type/make/power.

If I take the reading from the Burstner gauge it always seems to be at least 0.5V lower than a reading direct from the battery on my multi meter.

Is the Burstner gauge reading incorrectly because it was set up for one battery and now has 3 or is it just not very accurate. I am not aware there is anyway of resetting/calibrating the gauge.

Below is shown when the batteries are receiving charge from the solar. It's reading max of 13.5 but the multimeter is showing 14V. Probably not the best example as the gauge stops at 13.5.

Any thoughts/ideas?
IMG_6723.JPG
 
Those guages are never brillantly accurate. Only .5v out is pretty good really, and it cant read more than 13.5v anyway.
 

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