EB 240 charging from AC and car charger?

I have been trying to rig my EB 240 to charge with the regular Bluetti AC charger and combining a car charger output to it to increase the charging wattage. My 240 will not recognize the additional power from the car charger and only shows the 160-170 watts from the AC charger. (my AC charger is one of the older units)
I have only tried this when the 240 is only down about 1 bar on the meter (only about 20% down).