question

revel65 avatar image
revel65 asked

High charge voltage

After 7 months without any trouble my Absorbtion Voltage has

risen up to 17v and then dropped down again. I have the battery sense fitted but it worked fine before. I was told to turn off the networking but it is still having the same problem. img-2447.png

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img-2445.png

img-2396.png

battery charging
img-2447.png (263.7 KiB)
img-2446.png (243.3 KiB)
img-2445.png (291.3 KiB)
img-2396.png (309.5 KiB)
3 comments
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Paul B avatar image Paul B commented ·

is there anything else connected that can charge the batteries.

when its showing 18v this is at the solar reg terminals. whats the voltage at the battery.


the battery sense is measuring the voltage at the battery, removing it or disconnecting it changes the setting back to the regulator terminals.

some screen shots are from the battery monitor, and the others from the regulator, what is the battery monitor showing at the same time as the solar reg



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kevgermany avatar image kevgermany ♦♦ Paul B commented ·
These graphs both show battery, not PV voltage
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Paul B avatar image Paul B kevgermany ♦♦ commented ·
thats what he is asking is why did he get a 17v reading on battery voltage.
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1 Answer
snoobler avatar image
snoobler answered ·

Peukert 1.05 screams LFP.

Battery imbalance triggering OVP due to single cell over-voltage?


Try reducing absorption to 13.8V. Under expert settings, set fixed absorption to 3 hours with tail current disabled.


See if the high voltage issue goes away.


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