question

cheese avatar image
cheese asked

LiFePo4 12V charges through MPPT max to 13,3V and never reaches absorption or bulk mode

I noticed on the Victron connect app that last time my SmartLithium 'fully charged last time' was 62d ago. So SmartSolar history tells me the MPPT never goes into absorption and the trend line of accu voltage show a maximum it can reach of 13,3 V (during solar peaks of 100 W) . Is it possible that my solar panel from 200W should be catching min 180 W before I can reach this stage on my 200Ah battery?

MPPT SmartSolarLithium Batterypv limitbattery status
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2 Answers
klim8skeptic avatar image
klim8skeptic answered ·

@Cheese As reported by the LSB and the mppt it appears that your solar is not supplying enough power to fully recharge the battery regularly.

You have 2 options, reduce the loads, or increase solar output.

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cheese avatar image
cheese answered ·

So to give it a try I disconnected my fridge from the LSB and barely used the power last week (I think I charged 3 times an accu from a tool), and still it stabilizes around the 13.3V. When there is full sun on the solar panel the power goes up to 13,48V, but whenever the sun is gone it drops again.


the current status of SLB without sun

img-0804.png

3 days history:

img-0805.png img-0806.png

SLB and MPPT status during sunshine:

img-0802.png img-0803.png


img-0804.png (190.3 KiB)
img-0802.png (191.4 KiB)
img-0805.png (257.0 KiB)
img-0806.png (274.3 KiB)
img-0803.png (214.0 KiB)
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