Preheat oven to 300F. Line a cookie sheet with parchment paper.
Toss the pecans in a large bowl with the maple syrup and salt.
Place pecans on the parchment-lined baking sheet in a single layer.
Roast on the middle rack of the oven for 7 minutes. Toss the pecans and continue roasting for 3-7 minutes, until golden and caramelized. You want the nuts to get a bit toasted and for the maple syrup to caramelize so that it hardens when cooled. Aim for the full 14 minutes, but watch them very closely to prevent the nuts from burning.
Remove the maple roasted pecans from the oven and toss. Allow them to cool completely on the baking sheet, breaking apart any large clumps of nuts if necessary. Once cool, pour toasted pecans into a large bowl.
In a microwave-safe bowl, melt dark chocolate chips and coconut oil in 20-30 second intervals until smooth and creamy, stopping to stir between each interval.
Pour melted chocolate mixture over pecans and toss with a spoon until pecans are fully coated with chocolate. Next, use the spoon to drop the pecans in 12 small clusters on a clean parchment-paper lined pan.
If desired, lightly sprinkle sea salt on top of each of the dark chocolate pecan clusters.
Place the pan in the fridge for at least 30 minutes or until chocolate has cooled and the clusters of pecans have hardened. Serve, or store in the fridge or freezer for later.