As terrible as the human cost would be if Iran and the other Gulf states were to target each others' solar plants, it would be contained to tha region. India, and China, and America, and Africa, and Europe's PV would continue to generate electricity. Compared to what we have now, where a war in one part of the world makes energy expensive everywhere else.

Not to mention: PV generation is way more distributed than drilling oil and gas. Commercial PV generation facilities are smaller and more spread out. And even if the enemy bombs them all in a war, you can disconnect your rooftop solar panels from the grid and keep your house going. Do you have an oil well and refinery in your backyard?

I'll repeat it again: you don't burn solar panels to make energy. We need growing numbers of panels today because we're going solar. If the world were already at 100% solar then we wouldn't need nearly as much manufacturing or mining. We'd mostly just recycle old panels.

This is unlike fossil fuels. If you burn gas you will always need new gas. Forever.