What voltage is too low for LiFePO4 battery

How low a voltage can a LiFePO4 battery go? We bought a used 2022 Warwick Duo in Dec 2023. It has a LIFePO4 battery. I signed up to Sargeant Alerts before collecting the van and two days before collection got an alert and the data shows 11.2 volts triggered it.

However over winter it seemed okay and I didn't pay much attention to it! In April I did one night wild on the way to Mull and the voltage dropped to 0.6V. Starting the engine brought it back up and again it seemed to recover.

Over the summer it has been fine with the solar panel doing its job. Our usage has always been on site and plugged in.

Last week whilst away with family, and the van in storage, I received alerts and the voltage went down to 11.4V three times. In the preceding week when there was a bit of sun its voltage ranged between 12.4 and 12.8v.

I am guessing from these figures that it is a dud! Whether I can blame Brownhills for letting it go flat is another question!

It doesn't matter much what LB you have.  At this time of year, if the EC700 PSU isn't shutdown whilst the motorhome is in storage and not on an EHU, the standard fit solar panel is not able to generate enough electricity to keep the LB charged due to the load on it caused by the EC700.  When the EC700 PSU isn't shutdown, there is also a risk that something else has been left on which is adding to the load on the LB.  The only load on the LB when the EC700 PSU has been shutdown should be the Sargent communications & tracker unit which shouldn't flatten a fully charged LB.