I have 2 batteries.
The primary is a 9.5kwh and the secondary (the new one!) is a 5.2kwh.
When it was just the primary battery, if it discharged down to 5% that was as far as it would go. I understand that it is to protect it.
The new secondary battery was down to 3% last night (according to my app) - can I raise that one up to 5% also?
If so, how?
I have looked at Battery settings in the Cloud and it does not show the batteries individually.
I have the reserve set to 5% (it was on 4%)
I have already enabled winter conditioning.
So when I am looing at battery amounts - either on the app or the cloud - it is referring to the overall battery amount for both together?
If you have multiple batteries on the same inverter, the controls which are at a per-inverter level are for the two batteries combined. The inverter will manage the individual batteries itself.
The discharge-to lower level is the battery reserve, default value is 4%, and unless you want to save an amount of power for the event of a power cut (and you have EPS connected to your inverter), there’s not much point in changing this from the default, and certainly changing to 5% makes no practical difference.
In terms of discharging down to 3, 4 or 5%, bear in mind that the SoC figures are an approximation based upon battery voltage levels and a correlation between the two established when the batteries were calibrated. My inverter discharges my batteries down to usually 5% (despite the reserve being set to 4%), and this is because its hit the lower voltage level.
But sometimes I have seen it discharge down to 3%. Or 4% or 6%.
I wouldn’t worry about it.
If the battery level goes too low then the inverter will charge the battery up from grid to get it back to a safe level. This is automatic.
If your batteries are somewhere cold like outdoors then definitely switch winter conditioning on, but if you charge your batteries overnight then you probably won’t even need this. Mine are on the inside wall of the garage and I’ve never seen them get down to below 5 degrees even on the coldest winter days. But I leave winter conditioning on just in case