One aspect to consider is that poor people might consume little enough that they're actually less dependent on the grid than large McMansions with lots of appliances.

I lived for 3 years with 1040 watts of solar, traveling around the US in a motorhome. I really did not even feel like I was compromising on anything to save power, I had a tower PC, I watched movies with television + stereo system, etc. 1 kW of solar is tiny by residential solar standards. It's not hard to go solarpunk and live off of just solar, once you let go of large homes.