Revision history [back]

I am simulating an off-grid building with PV-battery system in Shanghai, where I expect that we shall have excess energy some part of the year. I have set the initial battery changing state to 100%, but it never recharges to more than around 70% over the year. Even if I doubled the PV capacity, this did not change. Does anyone have some ideas about what can be wrong in my settings? I supposed it might be a wrong setting that limit the maximum charging power. I tried to change the "Design Storage Control Charge Power" under ElectricLoadCenter:Distribution to 300 W * 24 stk = 7200 W and the Design Storage Control Discharge Power to 570 W*24 stk = 13860 W, instead of my initial setting that was for 1 battery (300 W, 570 W). It is 24 batteries connected in series. But that led to a fatal error "ElectricLoadCenter:Storage:Battery named="LEAD ACID BATTERIES". Battery discharge current could not be estimated due to iteration limit reached." Here is a PDF which shows my PV and battery settings.

I am simulating an off-grid building with PV-battery system in Shanghai, where I expect that we shall have excess energy some part of the year. I have set the initial battery changing state to 100%, but it never recharges to more than around 70% over the year. Even if I doubled the PV capacity, this did not change. Does anyone have some ideas about what can be wrong in my settings? I supposed it might be a wrong setting that limit the maximum charging power. I tried to change the "Design Storage Control Charge Power" under ElectricLoadCenter:Distribution to 300 W * 24 stk = 7200 W and the Design Storage Control Discharge Power to 570 W*24 stk = 13860 W, instead of my initial setting that was for 1 battery (300 W, 570 W). It is 24 batteries connected in series. But that led to a fatal error "ElectricLoadCenter:Storage:Battery named="LEAD ACID BATTERIES". Battery discharge current could not be estimated due to iteration limit reached." Here is a PDF which shows my PV and battery settings.