Well that bursts the bubble of having batteries that are more capable than AGM at lower SOC for half the price of LFP AND don't cause the A54 to list more to port. I can't believe my thought pattern at the moment, but if I could buy Lithium batteries that were as heavy as AGM's then my change to Lithium would be a fait-accompli.
I just don't like the thought of the boat listing even more to port!