Marie's Baked Bean Soup

• 1 onion
• 575 gr beans (baked)
• 500 gr dark kidney beans (red)
• 475 gr pineapple (chunk)
• 425 gr dry butter beans (cooked)
• 425 gr bacon
• 300 gr stewed
• 28 gr brown sugar
• 22 ml wine vinegar (red)
• 22 ml apple cider vinegar