Heat a large skillet to medium/low. Add 4 tablespoons of unsalted butter to the skillet & melt. Whisk in the brown sugar, low sodium soy sauce, garlic powder, & onion powder until smooth. Cook on medium heat for a couple of minutes until it starts to bubble.
Stir in the drained green beans, tossing to combine with the sauce. Cook on medium/low heat for 20-25 minutes, stirring occasionally. The sauce will thicken up as it cooks.
Stir in the bacon & cook for another 5 minutes on low. You can also opt to stir in half of the bacon & garnish the top of finished green beans with the other half. I do this sometimes for texture.