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I believe you could substantially improve efficiency using larger discarded water heater tank for thermal mass and mounting home baseboard radiator underneath the tank to eliminate need of pump outside sunshine hours. That would allow turning pump off when not collecting heat - and place checkvalves in the risers to your dish to prevent night time chilling of thermal mass. Your heated airflow would become more efficient and longer lasting.
I believe that no 2 people like their breakfast prepared identical, they always have a variation that makes a difference to them. I would bake mine about 8 - 10 min and serve on a pancake, or put a tiny bit of butter in the bottom and pour the pancake batter inside the bacon before adding the egg.