But it would require a stable power supply – which only a nuclear reactor can provide, as the Moon’s lengthy lunar nights make solar energy unreliable.
The trouble with solar on the moon is that the day-night cycle is a month long. You have to figure out what to do during the 2 Earth weeks worth of night.
I suppose with a polar base, you could have several solar farms strategically placed so that at least one of them is operational at any given time, but that's a lot of infrastructure and this is early days.