Where do you get this info?
Being a numbers guy, did you ever check the math on that? The Wikipedia page on solar efficiency gives an example of Central Colorado (not far from NM), which receives annual insolation of 2000 kWh/m2/year. So, a m^2 panel with 20% efficiency is good for 400 kWh/year.
NM has an area of 315 * 10^3 km^2, which translates to 315 * 10^9 m^2. At the above insolation rate and efficiency, that's 126 * 10^15 Wh/year of energy. The IAEA says global electricity consumption in 2019 was 22,848 TWh (22.8 * 10^15 Wh).
So, it seems to me that using standard PV cells and realistic insolation rates, covering NM with modern solar panels would yield
5.5 times that amount of energy.
A while back, I heard that perfectly harnessing the solar energy reaching the Gobi desert was like 800 times the world's electricity needs. For that to be true, my math says it'd need an insolation rate 7 times as high as central Colorado, which seems a bit unrealistic. So, maybe just a couple hundred times. Then again, the stat is old enough that maybe global electricity usage was quite a bit lower, at the time someone computed it.