Price reflects not only rating and voltage level but also efficiency class, cooling type, degree of customization, accessories, and warranty. Higher-efficiency designs with low losses cost more up front but save energy over time. Industrial specs may require special enclosures, corrosion protection, or hazardous-area certifications, all adding cost. Delivery time, testing scope, and service agreements (commissioning, training, long-term maintenance) round out total price negotiations with manufacturers.