How much is the lithium titanate battery fully charged
240KW/400KW industrial rooftop - commercial rooftop - home rooftop, solar power generation system.
Cells are nominal 2.3V max charge 2.7 so your options are NEVER go above 14.4V charging (and have much of your usable power happening <13V) with 5S or you go 6s and either charge at 15.5 or leave a bit on the table there never fully charging them.