So I'm a bit of a goof and I managed to run my packs down to 0% SOC(LVD).
As a reminder I have 1xSOK 100Ah 48v and 2xAOLithium 100Ah 48v batteries in parallel.
I have a Victron shunt in line on the main negative where all current running in and out of all 3 batteries will pass through the shunt.
I noticed last night the voltage was around 50.4-50.6v, but the Victron shunt showed about 63% SOC or so.
One AOLithium said 93% SOC and the other one said 94% SOC. Obviously wrong, however the SOK showed 86%, so it was wrong as well.
So all of these shunts were way off with the actual SOC of the batteries with a constant but low power draw.
My system has a pretty constant ~35W power draw as it's main usage in the winter is just to run internet equipment and sort of act as a backup power system.
The solar setup stinks in the winter as it only produces ~1.2KWh at best, but would produce probably 10KWh+ in the summer.
Shading in the winter is the main issue as my back yard is on the north side of the house, and it's small. So the house shades it 90% of the time.
The BMS on the SOK and one of the AOLithiums has turned off.
The sun is coming up but I have to clean snow off the panels again soon.
Crossing my fingers that the AOLithiums will reactivate once some charge current starts flowing!
I ordered a cheapish 48v(8A) charger to have on hand so I don't do this by accident again but that won't be here until tomorrow.
It won't charge quickly but at least I can use it to keep things up if I don't pay enough attention to the pack voltages.
As a reminder I have 1xSOK 100Ah 48v and 2xAOLithium 100Ah 48v batteries in parallel.
I have a Victron shunt in line on the main negative where all current running in and out of all 3 batteries will pass through the shunt.
I noticed last night the voltage was around 50.4-50.6v, but the Victron shunt showed about 63% SOC or so.
One AOLithium said 93% SOC and the other one said 94% SOC. Obviously wrong, however the SOK showed 86%, so it was wrong as well.
So all of these shunts were way off with the actual SOC of the batteries with a constant but low power draw.
My system has a pretty constant ~35W power draw as it's main usage in the winter is just to run internet equipment and sort of act as a backup power system.
The solar setup stinks in the winter as it only produces ~1.2KWh at best, but would produce probably 10KWh+ in the summer.
Shading in the winter is the main issue as my back yard is on the north side of the house, and it's small. So the house shades it 90% of the time.
The BMS on the SOK and one of the AOLithiums has turned off.
The sun is coming up but I have to clean snow off the panels again soon.
Crossing my fingers that the AOLithiums will reactivate once some charge current starts flowing!
I ordered a cheapish 48v(8A) charger to have on hand so I don't do this by accident again but that won't be here until tomorrow.
It won't charge quickly but at least I can use it to keep things up if I don't pay enough attention to the pack voltages.
