What I see is the difference between L1 input and L1 output is 369Watts which not surprisingly is the same amount of watts that are going into your battery. 13.2 V x 26A = 343Watts. (not sure where you are seeing 3A, one screen shot shows 25.9A and the other 26A.)
As to why the battery charging current is only 26A vs. 120 may have something to do with charge voltage settings that work together with amperage settings. What is the amp hr rating of your battery? 120A charging is fairly high implying the battery bank should be 300Ah or more.