Need to take a bit of care interpreting those voltage readings and there is nothing I can see that indicates a crook
battery
Picture 1 shows leisure
battery at 14.3V which might be expected if the sun was shining or the mains was plugged in and the
battery was part way through the charge cycle
Picture 2 shows the engine
battery at 12.8V - resting voltage or a while since the engine was running probably and indicating a reasonably charged
battery. More info needed to comment accurately.
Picture 3 shows Amps ?????? so perhaps charging amps if you have the charger running. Need info on conditions when that image was taken.
Unless I'm missing something critical, no conclusion can be drawn from those pictures.
Cigar lighter socket could well be getting power from the engine
battery.
Switch your
battery monitor to show only the leisure
battery, charge it up fully with a decent mains charger, switch the charger and the
solar regulator off and let the
battery sit for at least six hours and read the
battery voltage. Should be 12.7V or higher.
Switch on a couple of interior lights having a known wattage rating - not fluoros or LEDs - and take a voltage reading every half an hour until the voltage drops to 11.5 volts.
Report back.
Or charge the
battery fully and take the vehicle to a specialist
battery shop or decent workshop and get them to do a load test for you. Not 100% reliable but will give an idea if one or two cells have had it.
BTW, the panel will put out a maximum of around 3 or 4 Amps on a good day, so I don't know what the 49 Amp reading is unless the engine is running or mains power is hooked up.