diy solar

diy solar

3x 100w panel in series produce voltage but no amps / charging battery

MartinBe

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Joined
May 22, 2023
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Hi,

I have 3x 100W panel 20.4v vmp 4.91a imp wired in series, a victron 75/15mppt, a 100AH 12v lifepo4 battery. Using 10AWG cables.
I used the preset lifepo4 setting in victron.
The voltage spike from solar and current stay 0 and battery voltage is good but current from 0.00 to 0.10 to 0.20

current in battery section mean the battery is charging but at a very low rate?
The setting 14.20v absorption and float 13.5v seem ok value
0W to 1W showing


Screenshot_20231209_141257.jpg
 
voltage spike from solar and current stay 0
BMS shutdown the charge path. Apply a load to the battery and it should recover. Use expert mode to reduce charge voltage to 13.8 volts. Use this charge voltage with a long absorbtion period.
 
BMS shutdown the charge path. Apply a load to the battery and it should recover. Use expert mode to reduce charge voltage to 13.8 volts. Use this charge voltage with a long absorbtion period.
I did apply a load and it did not recover. Should I add a tail current to trigger the absorption or reduce the voltage to my battery voltage to trigger the absorption?
 
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