Adding DC (photo)

I've started working on the solar system. It's not really a good time of year to be doing solar, but I've had the panels for over 2 years now, and I'm interested to put it all together. Besides, it does add a battery backup component, which is a good thing to have during winter storms.

On the left (gray boxes) is the AC side. On the right is the start of the
DC (solar) side.