Just wanted to say that I have a backyard "garden shed" observatory and I have the benefit of permanent AC power. That being said, I run all my equipment off of a DC converter. I originally used a simple 70W 10 Amp "generic" power supply which I ran to a Power Distribution Block mounted to my Scope, and from there to the mount, mini PC, Camera, EAF, etc...
Well, I had a few strange issues lately and decided that just MAYBE it was power related, so I went out and bought a much beefier Power Supply. Figuring that automotive batteries that everyone seems to use are 13.8 V, I bought a nice 13.8 V, 30 Amp power supply. Now, I recommend you check all your equipment first, but ALL of my Astronomy Gear will safely work at 13.8 Volts. HOWEVER, the Mini PC will not boot at that voltage... So, here is the whole point of my post... I picked up a beautiful little DC voltage regulator. It is small, very lightweight, and works wonders!
If anyone needs an inexpensive Buck Converter / Reducer, I highly recommend it!
I now run 13.8 Volts to the Power Distribution block, and then out to all my Astronomy gear, but I added the converter in between the Distribution Block and the Mini PC. All is well again!