SmartShunt setup - wrong SOC
Hello guys, thank you for the great help on this forum.
I just ran out of power after 3 days of almost no solar charge, but I am confused because:
- the Smartshunt indicates 82% state of charge while the batteries are 9.7V. I doubled check with a multimeter and yes the batteries are 9.7v.
- I have 2x150ah=300ah lifepo4, and the Smartshunt indicates a deepest discharge of 118ah, which matches my recent consumption: laptop 5 hours/day 5x3x5ah=75wh, smartphone 5ah x3= 45ah, total: 120ah
2x150ah lifepo4 ECOWORTHY batteries in //, with 3x150w solar panels in //, through Victron MPPT SmartSolar 100/50, monitored with the Victron Smart Shunt, and converter / charger Victron Multiplus 12/800.
My questions are:
-Does the SmartShunt not supposed to show 0% as batteries are fully discharged? I previously set the capacities and types of the batteries in the Smartshunt, I synchronized at 100% when batteries fully charged, I calibrated with zero current... what else should be setup?
-The batteries have 300ah, considering a max discharge at 20% I should have been able to get 240ah at minimum. Could my batteries out of services or low quality? What should I do?
after full shore recharge:
only 118ah deepest discharge with 300ah lifepo4 batteries Ecoworthy
what is strange is that about 3 weeks ago, I went deeper into discharge SOC +/-70%, but the voltage stayed higher. With equal settings.
Thank you again