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sometimes when charging battery it's jump form 60% to 100% or 70 to 100%. I feel it's look like battery bms bugs or old growatt firmware bugs.

look like the problem was cause by battery. My battery was 16 cells and look like bms not interpret well with growatt. Try check the battery.

my battery bms not working perfect with growatt Li mode. With Li mode battery only charged around 60-80%. Now i used user2 mode and battery are fully charged.

can i use trina vertex 550W solar panel with 18.4A (Isc(A)) on SPF6000ES 2 strings?