For example, one set solar panels on my roof yielded 5.2MWh in 2017. Their nameplate capacity is 5kW, so the nameplate yearly generation is 5 * 24 * 365 = 44MWh, so my yield is about 12%. The other, smaller set (better panels, better site) yielded 4MWh or 15%. Actual generation is roughly an order of magnitude smaller than nameplate suggests.
And I live in California, where we don’t get a lot of rain - these numbers could be worse.
If you look at the power that will be actually generated by this new solar capacity referenced in the article, it’s far less than the power that will be generated by the other technologies, just because solar has such a bad yield.
So it’s not even true that incremental power generation is dominated by solar.
I love solar power, but I don’t think articles like this advance the cause, because they aren’t thinking critically enough. Lazy reporting does us no favors.