Place the roasted peppers, beans, onion, garlic, chili powder, paprika, cumin, broth, salt and tomato paste in a 6-quart crockpot.
Stir until the tomato paste disperses, cover, and cook on low for 5 hours until the onion is completely soft.
Transfer 4 cups of the chili to a blender and vent the lid carefully.
Blend until smooth, return the puree to the crock, and stir until the remaining whole beans are suspended in a thick red broth.
Add the sherry vinegar and cook uncovered on high for 15 minutes before serving.