In a large pot, bring enough water to generously cover the beans to a boil, remove from heat and add beans. Cover and let soak for 1 hour.
In pressure cooker, Saute bacon until crispy, remove bacon from rendered fat and set aside.
Over medium heat soften onion in bacon fat, then add garlic and saute for ~30 seconds.
Add beans, bacon, tomato sauce, vinegar, chili powder, brown sugar, jalapeno, and measured salt and pepper to the pressure cooker. Top with enough water to cover beans and an extra ½ inch of water above the beans (~6 cups).
Cook at high pressure for 35 minutes, then quick release.