I have no idea how that would work. I do see sugar free dry jelly pectin. Not sure if they sell sugar free liquid pectin.I wonder how a sugar-free version of your recipe would be???have you ever considering trying monkfruit in place of the sugar??
My recipe calls for 6 1/2 cups of sugar, and I made a double batch so 13 cups of sugar is what I ended up using.
And it's called Jalapeno jelly but it should be called green pepper jelly, lol. 1 1/2 cups of green and red pepper and only 1/4 cup of jalapenos. All mixed in the food processor.