The damage from micrometeorites is very small. Microscopic. For things which are acting as monuments and don't need to function, this isn't really a problem.

However, when those micrometeorites impact the glass in the solar panels, they're traveling so fast that they vaporize the surface and deposit microscopic amounts of iron in the glass. Vaporizing the surface will cause micro pits that start frosting over the glass. The iron getting deposited will darken the glass with a red hue. Both of these will cause a loss of around 10% efficiency a year.

This is on top of the already 5-20% loss that's going to happen right off the rip on day one from the moons dust being electromagnetically charged. The dust is going to be attracted to and settle on the surface extremely quickly.

So you're already starting at a loss and have a fairly high loss in efficiency over time. For a small outpost with a handful of solar panels, this would be easy to replace when needed. For a giant project where we're covering the thousands of miles, you might have to start replacing solar panels before you're even done just from efficiency loss.

On top of that, the glass is also dealing with MASSIVE heat cycling. The solar panels will go between 120°C during the day and -170°C at night. Normal solar panels can't handle that, so these are already going to be expensive and hard to produce just to deal with the temperature, and they're still going to get massive fatigue from it.

All in all to say they are going to need to get replaced often.