Battery SOC minimum %

Spizz

Spizz

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I'm just wondering what everyone has their minimum SOC % set to? I used to have it set to 30% min but with loadshedding less of a threat, I've recently moved it to 25% to get an extra bit of Eskom free power when needed during the early mornings.
 
If I had one, I would use 0%. Also, I guess it depends how low the BMS goes.
 
I used to use a homeassistant automation and the modbus interface on the victron to change the soc according to the time of day - so stepping it down from say 60% at 8pm down to 10% just before sunrise - this meant I didn't have to worry about changing it during loadshedding or power outages, just make sure that it wasn't going to be too cloudy if there were power issues expected.
 
Set to 20% as per manufacturer specs. If grid goes down, the battery will discharge till 10% before switching off. Manufacturer says the occasional drop to 10% will not affect the warrantee.

1766054317504.png
 
20% for my 5kWh Sunsynk battery (which according to Powerforum Store is actually a rebranded Eenovance).
 
Used to be 20% but currently 25% due to some issues I had when our sub station burned down.
Should probably move it back to 20.
 
Last edited:
60%. During the past 12 months, it has never fallen below 62%

As a result, a battery which is now 3 years old has completed 219 cycles so should last a long time

12 x 550 watt panels
4 x 5100 wH batteries
7.2 kWh inverter

Incoming AC is switched off from September to April
 
I have 4 pylontech batteries the up5000
Set to 30% but never had it switch over to grid for a very long time
Wish there was a way to see cycles.
 
chrisc said:
60%. During the past 12 months, it has never fallen below 62%

As a result, a battery which is now 3 years old has completed 219 cycles so should last a long time

12 x 550 watt panels
4 x 5100 wH batteries
7.2 kWh inverter

Incoming AC is switched off from September to April
Click to expand...
Nice, wish I had space for a 4th.

Do you set it lower in winter? I don't think it's really worth chasing super low cycles as age will also cause the battery to deteriorate so there is definitely some balance here. Looks like the average "calendar life" for LFP batteries is around 10-15 years so it's probably fine if you try and match that to how long it would take to use your battery to its rated cycles.
 
30%. Could go as low as 10%. I make sure I get to 30% overnight. I am using the battery bank when I can.
 
My battery turned 5 years old at the beginning of October. I'm happy with the 100% state of health (obviously).

1766068047168.png
 
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