Hi all, I have three SMA Sunny Island 8.0H-11. I just got some new Cegasa eBick Pro 280 batteries, they are 8 modules. These are the first lithium batteries I have and I do not know exactly how it all works. My understanding was that you set a new batterie on the SI and set it to lithium external BMS and no other configuration is needed.
The problem I am having is that the batteries are going to be at for example 70% SOC and SI will rise frequency and there fore PV power is reduced (using fronius AC coupled inverters), charging the batteries at only 1,5kW.
I do not understand why they charge so slow, the batteries control panel show that for this SOC it can charge up to 648 amps. I am attaching a photo of the control panel HMI (the photo is not of when charging only 1,5kW).
Does anybody have experience with SI and lithium or with Cegasa batteries and can help me?
Thank you
The problem I am having is that the batteries are going to be at for example 70% SOC and SI will rise frequency and there fore PV power is reduced (using fronius AC coupled inverters), charging the batteries at only 1,5kW.
I do not understand why they charge so slow, the batteries control panel show that for this SOC it can charge up to 648 amps. I am attaching a photo of the control panel HMI (the photo is not of when charging only 1,5kW).
Does anybody have experience with SI and lithium or with Cegasa batteries and can help me?
Thank you