I am not sure, I will try and find a spec, but I thought the minimum voltage was often a problem. If I look at the wiring diagram, then I would say that the direct battery connection is part of the solution.
Edit:
It should be 14.0-14.6Volt
https://sunonbattery.com/properly-charge-lifepo4-battery/
12,6-14.4V is the voltage that I measure. And I use a not-so-accurate digital voltage meter/USB charger. But that is nice to see if the voltage is stable.
But as said, I plan to go to the LiFePO4 but the cheap Yuasa is for the moment good enough.