"If you are stating that current poverty should be made worse ... "
Raising electricity prices a fraction of a percent on poor people who are already receiving subsidized utilities, is not making their poverty worse. As you noted, solar isn't widespread, and thus is obviously not raising electricity prices in a meaningful way.
The price of coal moving up or down 1% does more to impact the price a poor person pays for electricity than all of the solar tax credits in the first world combined.
It's clear that the poor in the US are not going to pay a lot more for energy. They're going to receive higher subsidies from the welfare state to compensate for any price increases. Given the poor are already running a negative tax basis, it's accurate to say they're not paying for electricity at all to begin with. And to make this point easily clear: show me the negative tax basis of the average poor person in the US, and then show me the average poor person's electricity bill.
If one actually cared about the poor and their electricity bill, the only meaningful place to start is the Federal Reserve, putting an end to their 40 year debasement of the US dollar and this chart that it has caused: