seeking advice from van dwellers.

He pool of water under cars is from condensation from the refrigerant line I think.

Learn something new every day!

chris21 wrote: That puddle is from condensation on the condenser... a part of the A/C system with the specific function of collecting water (condensation) caused by cooling the air to a temperature below the dew point.

Correct me if I am wrong, but this seems off to me. The condensers specific function is to state change the working fluid (not the ambient air) from a vapor to a fluid. In doing so heat is moved across the heat exchanger from the working fluid to the ambient. The evaporator works the other way... working fluid goes from fluid to vapor and heat is moved from the ambient into the working fluid. So I would think water vapor would condense from the ambient onto the evaporator coils, not the condenser, since in the evaporator step the air is being cooled. A quick google search seems to bear this out.

chris21 wrote: That puddle is from condensation on the condenser... a part of the A/C system with the specific function of collecting water (condensation) caused by cooling the air to a temperature below the dew point.

Xam is correct - condensation occurs on the external area of an evaporator, which is cold. The condenser (the tank that is pump-pressurized) is hot.