Find the optimum of two variables in complex code

Hi all!

So I'm investigating the optimal battery size and consumption power to achieve even power consumption in a smaller smart grid for all hours of a year. The code is built up as: if the power consumption is higher than set allowed, discharge batteries, and if the power consumption is lower than set allowed, charge the batteries (w. solar power or from the grid).

Now I'm just testing different battery sizes and set allowed power consumption to see what combination results in my goal: 10 % of the hours can be ~= allowed_power.

Is there a more efficient way of doing this?

Thanks!