Which model should I choose: the Lybra 6K-T, 10K-T or 12K-T?

“The three models differ in terms of rated output power (6, 10 and 12 kW), maximum power (6.6, 11 and 13.2 kVA) and maximum output current (10, 16 and 20 A). They all support up to 18 kW of photovoltaic power across 3 MPPT channels and the same Heiwit sodium-ion batteries.”