I’m looking for someone who can share their experience with long‑term use of Pylontech 5000 batteries. How are the SOH and SOC evolving over time? I currently have 6× Pylontech 5000, and I’m planning to upgrade to 12 units. I’m also expanding my installation to 4× Multiplus II 5000 and a 24 kWp PV array.
Thinking 3 and more years
thanks
Peter
Hi mine are 3 years old (3x us5000, 4th us 5000 is from 2025), soh of those 3 batterys is 98%
They are used daily and discharged to a minimum of 40% soc and charged to 100% (if enough solar)
i do have batterylife active so the system controls discharging and charging year round, works perfect for me, never have to change any settings (summer/winter)
I have 16 x US5000 connected via 8 pairs as per instructions. SoH is at 98% after 3Y.
I let min soc move along with solar forecast. In summer it’s mostly 20~30%. In winter it’s 50~70%. I did drain them to 5% 2 or 3 times over the years to allow the BMS to see all ends of it. Not even sure if that’s a good idea but from an EV car battery perspective it seems to be widely recommended to ensure decent capacity readings on LFP type cells.
Depends how you treat them. We have seen many issues with cell failures later in life.
The heavier you push them, the more common the failure.