I dunno... it's expensive in the short term but you end up with an energy infrastructure that makes you energy independent and where costs will only go down over time since solar/wind/batteries are all on a Moore's law like cost trajectory.

Fossil fuels meanwhile will on average only get more expensive over time because they are being depleted, and this isn't considering other externalities besides CO2 emissions.

There are reasons besides climate change to get off fossil fuel.