I'm starting backwards.... 1000 euros down the drain! In the first few days, everything was fine. When I installed new lead batteries, even though it recognized them and worked, when they drained during the first charge, it never worked again. I started changing the settings and gradually increased the charging amps. And still nothing! And when one night I set the charging from the grid, after 4 minutes it was like Easter came early! Short circuit, sparks, and smoke. Permanent fault indication 09. All the IGBTs burned out. I sent a message to the seller, he accepted my explanation, and after much effort and suffering, after 2 months I received the new motherboard from the Sorotec factory. I installed everything and again fault 09. I’m doing this review mainly for the company!!! I then dealt with the technical department and there was no willingness at all! They told me to check 2 basic things (to see if the MOSFETs and IGBTs are visually fine and to check the wiring). After pestering them, they replied to take it to a technician! They sent a new board and the response was to take it to a technician!!! The word Sorotec is erased from my memory..... I will tinker with it myself by changing the IGBTs, and if it works, it works! 1000 euros without an inverter. For the record, I got an Easun power!!!! Perfect! For 270€!!!!!!!!!!!