I made syrup this spring. I tapped a couple of small BoxElder trees in my yard, and one of my sister's Maple trees. It was huge and I got three taps in it. She has 2 other large maples in her yard, and I might tap them this spring too. I didn't have enough taps for all of them and those two trees are on the sidewalk and I'm leary of schoolkids messing with them on the way to/from school.
Anyway, I just poured the sap into my electric keggle and it did fine. I could leave it running for hours without worry. I ended up with 2 gallons of syrup, but it was kind of dark. It tasted good, but I found it sugared up in short order. Next time I will definitely go by the temperature, and not worry about the expected finished volume. For some reason I ended up with nearly twice the syrup I was supposed to get.
I'd like to improve the boiling equipment and make a large surface electric rig. My keggle worked fine, but boiled off slower than I'd like. I could easily build a large pan with 3-4 smaller elements and boil the syrup a lot faster.
A wood fired system would be better, but I don't have the time and ambition to manage one. The electric is just VERY handy to operate.