Those numbers seem low. I don’t doubt that’s what was quoted, but I don’t think they were fairly calculated. For example, a lot of times the greenhouse gases used in refining materials used to make panels are not included, on the assumption that they will be recycled. Turns out recycling is not economically worthwhile (mostly because of these externalized costs). But that’s most of the greenhouse gas emissions: turning silicon dioxide into pure silicon using coal.

Regardless it’s apples to oranges. You are comparing your solar output to the mix of fossil fuel power the grid supplies. But a small modular reactor would be a carbon-zero power source.