The cost of a custom box depends on its size, voltage, features, and certifications. Here's a breakdown of average ranges: 12V/24V Off-Grid Boxes: $200–$800. Panel Box 400 X 300 X 170. Electrical Enclosure Box for sale - Electric Plus Company ▷ Price: ₦ 35,000 on Jiji. Quality. In this guide, we'll break down what power distribution boxes are, why custom solutions make sense for specific applications, how much they cost, and how to choose a reliable manufacturer (including a look at CNC Electric's industry-leading offerings). By the end, you'll have all the tools to. EWJ are a professional metal enclosure manufacturer providing electrical enclosures, aluminum enclosures, stainless steel junction boxes, and IP65 outdoor enclosure solutions. A distribution box serves as a crucial component in electrical installations, housing circuit breakers, fuses, and other protective devices that ensure safe power distribution. Submit your requirements or design draft to us, and we'll provide a free design and deliver a high-quality prototype in just 15 days – ensuring your project stays on schedule with speed and precision. Choosing custom power distribution boxes from J&HW Group ensures cost efficiency through in-house. Self ship it at cheapest rate! We're available 24/7 to help you! Knockouts: This electrical outlet box is designed for multiple purposes with ten 1/2 inch knockouts and six side knockouts (two end knockouts & 2 top/bottom knockouts).