I have been wanting to do something similar.
Just to clarify, are you not allowed to export or just don’t obtain any credit (Feed in tariff).
How do you control your air conditioner?
I have partial control of the air conditioners via WiFi to InfraRed bridged. I have two commercial ones, but I have also built two using ESP8266 and control with ESP Easy. When I say partial control, none of the WiFi controllers can change the Powerful/Quiet/Normal mode. There are many different IR protocols used for air conditioners even within the same brand.
To make the controlling of the air conditioners more complicated, I have found the available power can be highly variable. I am not just talking about 3 or 4 minutes when cloud comes over, but days when it is overcast and the light varies greatly over 30 to 60 minutes. By controlling the temperature setting of the air conditioners the power demand can be varied, however there can be a 5 minute delay for the demand power to drop off.
Just to make my situation more complicated, I also want to run our pool pump when sufficient power is available. I already have the system working to run the pool pump to run when there is sufficient power and this works well if the air conditioners are controlled manually.
In the period between the transition between summer and winter, I want to control the air conditioners depending on available power and a set of predetermined conditions.