After Reading all the FAQs here i’ m still not sure, where my problem is…
my configuration (Van, 12V)
Bulltron Lifepo 210Ah battery
Victron Smartsolar MPPT 75/15 and a 110W Panel
Victron Smartshunt 300A
Victron BlueSmart IPP 22 12/20 charger
Problem: after a few weeks without charging, only solar the battery was around 60% according to the Shunt.
charging let the shunt went to 100% after “filling” the Ah, he was showing as missing. This was at a current of 13.5V.
Since 2,5 hours the Charger is still loading with 17A and the Shunt rests at 100%.
My settings:
The Charger and the Solar Charger settings are Standard set to Lifepo.
View from the portal:
Thanks for any help!
Moved to a separate topic.
One observation is you have very small charge sources for your battery so setting synchronisation on your shunt is harder.
Ideally your tail current should be 4% but your solar is less than this so I understand why you have 1%, but this is quite low. The charged detection time of 30 mins is very long. This means your shunt may not reset to 100% even if the battery is full. A shorter detection time may be better.
Having said all that, you are showing a higher SOC than real which the above comments do not answer because hard to synchronise makes the SOC lower.
The SOC does drift with time so regular charges to full are useful. If you have a low quality BMS that has high self consumption power then over a long period this takes energy from the battery that the SmartShunt does not measure. If you have a battery with built in heating then this can consume power from your chargers to warm the battery up that does not go into actually charging the battery. The Smartshunt will read this power and assume it is charging the battery. Both these give you a higher SOC than reality. The battery heating can be an issue with such a small solar supply, all the solar tries to warm the battery but it is not enough to get the battery warm enough for charging so the SOC never increases but the shunt says it does.
You probably want to say a VOLTAGE of 13.5V. Or is it really current of 13.5A?
The SOC is completely irrelevant as long as the voltage does not reach the final charging voltage (probably 14.4V?). The SOC is not a result of an accurate measurement, it is always caculated an a rather unreliable base.
sorry, yes sould be Voltage, not current
Thanks, what setting would you recommend?
Given you only have at most 8A from solar a choice of 2% may be a better compromise. It could be argued that 4% tail current would still be OK because if your solar was charging at 6A and it got to 14.0V you would be fully charged.
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And for the time setting?
Default it 3 mins, sometimes with solar longer is better, say 5 mins at most.
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