Yes. Are the battery terminals bright shinny clean, tight and connector to cable the same same?
What is the charging amp capacity of the charger? Mine can charge 100A DC and draw 11A AC. Add a A/C to the mix and things can get hot in a big hurry on 20A.
When I'm on a 15A or 20A plug I throttle the charger down to 10% or maybe 20% and the A/Cs are OFF.
And 2x 220 Ah GCs are undersized for a 2500 W inverter.
2009 Holiday Rambler 42' Scepter with ISL 400 Cummins
750 Watts Solar Morningstar MPPT 60 Controller
2014 Grand Cherokee Overland
Bob