I think this was the case when solar panels were much more expensive. But home solar in the US has long ceased to be a useful driver of funding efficiencies and innovation. The cost of panels is now tiny and you are mostly paying for extremely overpriced installation and permitting. The 30% federal subsidy alone is enough to pay for an equivalent amount of utility scale solar outright. Australia has similar labor costs to the US but home solar is 1/3rd the cost to install.