Sorry for the bad photos above. My camera battery died, and I tried using photos off my phone.
My preferred option to stock up sweet potatoes, is freezing them. Click here to see that post.
I made beet chips way back in 2012, before I even had a mandolin or a dehydrator, and they were delicious! Info on that post, CLICK HERE
We tried "chips" this time in the dehydrator. My dehydrator guide book stated 125°F. They literally tasted just like sweet potatoes. I highly recommend, that if you want snacking "chips" to season them with maybe garlic, cayenne or other spice/herb. I used a tiny bit of organic avocado oil and salt. They are bland. So season it up if you want flavor.
You can also dehydrate just the sweet potatoes, and grind them into powder for smoothies etc. I have not done that, but I may try it in the fall when it's cooler out.