Slow cooker wattage and cooking quality are connected, but wattage is not the most important factor. Higher wattage may heat faster, but slow cooking depends on steady, gentle heat. The best results come from even heat distribution, accurate temperature control, the right crock size, and a tight-fitting lid. A cooker that runs too hot can dry food out, even if it has impressive power. Choose a size that fits your meals and keep it halfway to two-thirds full. For tender stews, soups, and roasts, consistency matters more than wattage.