You would need the entire roof filled with solar and corner the market in 120 amphere batteries to get that kind of power

The trick is in the insulation factor ans if you are thinking of a new build massive earth banks and roof could get you to a comfortable tempreture without the need to spend much on aircon if your by a large water source you can also "air con by heatpump taking the coolness of the water and concentrating it you can gain a 1-4 oir five advantage that way