Air Condition Assisted Solar Water Heating?

The picture, at left, shows a water tank and an air condition unit next to each other - you can see them better here, next to the Tatil sign.

That caught my eye because it's generally a bad idea to have a large amount of water that near an electric device, especially on the roof of a building. Water flows toward the ground, and can conduct electricity. Generally speaking, we would call that bad. But there was something else about it that made me think. Air conditioners basically cool an area by heating another area- actually, it's the removal of humidity, but air coming out of an air conditioner is generally warmer where it is venting. A copper tube array across the blow out from an airconditioner could make solar water heating more efficient (as long as it didn't block airflow). Maybe not much - a fraction of a degree, or whatever - but every little bit counts, and the latent energy could be used productively instead of simply heating the atmosphere.

Sounds good in theory, anyway. Integrating air conditioning and solar heating in that way could make for more efficient heating. Maybe. It doesn't hurt to think about it.