My biggest gripe against the title of the poll "Climate or economic growth?" is the underlying assumption that economic growth comes with comfort growth. Going from oil heating to heat pumps will decrease GDP while improving comfort. Making durable fridge will decrease GDP while improving comfort, etc. Not fixing the climate will increase the GDP because of all the mitigations we'll have to implement (iirc French government estimated 15% of GDP will go to climate mitigations in 2050)
Now about the thesis of OP, even if we assume a full solar + battery world, and manage to keep that +2C, electricity pricing will swing a lot (it'll probably often go negative or at least to 0) which will lead to discomforts (people not able to pay for electricity in the winter) without state protections, even if economic growth is here.
And then electricity is not enough. Simply keeping the production of autos has a considerable CO2 cost.
Now about the thesis of OP, even if we assume a full solar + battery world, and manage to keep that +2C, electricity pricing will swing a lot (it'll probably often go negative or at least to 0) which will lead to discomforts (people not able to pay for electricity in the winter) without state protections, even if economic growth is here. And then electricity is not enough. Simply keeping the production of autos has a considerable CO2 cost.