No. The article is a coded call for subsidies of solar through "improved" financing. Subsidizing a specific activity means the government picks the technology. A carbon tax would bring all the same benefits and would not have the government deciding which technology to favor. For example there is a competing technology called "smaller houses". A carbon tax would promote that and leave the choice in private hands.
I am not sure why y'all are arguing. Either a carbon tax or better financing would help.
They both help reduce climate change? Not sure. Without a carbon tax you could burn 100 tons of coal to make a "green device" and nobody would know the exact figure. With it, you don't even need to do the calculation. It's in the price.