Just look at the prices you pay for heating your water and houses.
My brother build a 12m² solar heater for heating his water and house on his roof and saves 1/3 of costs every year.
He insulated his house and saves another 1/3 of costs each year.
In the long term he saves money, because he doesn't has to spent it to the gas supplier. And by rising prices it's the best you can do.
And if you use photovoltaic panels to power your air conditioner it's the best you can do.
1. shadow for your roof, if installed above and not in the roof. (helps to cool the house)
2. saves energy costs.
Money is the best motivation to change others viewpoint.
Just look at the
oilprices.