Solar credits are not income-limited. At all.

You might be able to use your low income year to qualify for low income green incentives, however. This would probably be something for 2024 when you can document your low income with your 2023 tax returns. There are state programs available (I'm getting nearly $13k off of my solar project). By the time you can use it, the High Efficiency Electric Home Rebate program should be up and running.

Other stuff you'll qualify for include the full child tax credit, but you don't have to do anything special to get this.