Carbon Credits for Small Solar Systems

Dear All,

Please help me to find out:

How to Calculate Carbon Credits that one can accrue, by installing, say for example a solar water heater of 100 lit/day capacity and having solar collector area of 2 m². Inlet water temp~20⁰ C and the range of out let temperature attained is 70-80⁰ C. Average Solar Radiation at our location is 1200 watt/ m²

Similarly these days solar assisted air conditioning systems are being marketed. For which manufacturers are claiming that these A/c units consume only 60% electricity compared to normal a/c systems, as some new refrigerant is being used in these systems. These systems heat the refrigerant in solar collectors. Two solar collectors (total area of 2 collectors is 4 m²) is installed with each solar assisted a/c unit. Pl help how to calculate the carbon credits for these types of systems.

Regards,

Dr N P Singh