I have a problem with my new battery I have bought. My system is a 100watts solar panel, Victron mppt 75/15 and I had 2 vehicle battery’s and that worked fine. But I needed more power, so I bought a Lifepo4 300Ah Battery. I am able to do my things with that, everything works but the mppt won’t charge. It stays always on absoption. I don’t know if I have to change anything in the mppt settings, I chose the “smart lithium (Lifepo4)” profile in the mppt. It shows always 0 watts from the solar panel.
Check your cabling, crimps, fuses. The battery reports 12.6V but the MPPT 14.2V, thats way too high of a voltage drop for no 0A. Also double check those voltages with a multimeter.
Further, the Victron MPPTs need a PV voltage of Vbattery+5V to start. Your PV only had 17.2V in the second screenshot, but 19.2V on the PV are necessary to start charging
Thank you for the answers. The PV Voltage is that low because of the time I made that screenshot. There was not much sun anymore at 20:30 pm. I think the blown fuse/open breaker is the answer. I bought a fuse a few minutes ago and will check that tomorrow. I’ll let you know and it is really possible that this may be the fault because of my inexperience..
