Did you increase the charge rate based on calculation I gave, so not to overload main cutout? However, I find EON nextdrive a better tariff overall, as the peak day rate is discounted in the deal and not at the price cap Octopus charge!
Maybe hold off/part discharging a couple of days, to get them float to 100% over the a couple of nights, it’ll be better in the longrun.
I can’t see Sodium batteries ever having the WhKg density of LFP and their size will be much greater to achieve the same density.