Price of Photovoltaic Secondary Distribution Box

The price of a photovoltaic (PV) secondary distribution box typically ranges from $50 to $300 for residential and small commercial units, depending on specifications and features.

Typical Pricing

Amazon Listings: A 2-string PV combiner box with DC and AC circuit breakers, surge protection, and IP65 waterproof rating is available for around $120–$150 for residential 8–10 kW solar inverter systems (Amazon.com). Manufacturer Pricing: Chinese manufacturers like LEIDUN offer PV distribution boards and combiner boxes with competitive pricing, often in the range of $50–$200 depending on string capacity, voltage rating, and additional features (Made-in-China). Commercial and Industrial Units: Larger or more advanced combiner boxes with monitoring, anti-reverse diodes, or higher amperage ratings can cost $200–$300 or more, especially for multi-string or high-voltage systems (Power Home, ETEK Solar).

Factors Affecting Cost

Number of Strings: More input strings increase the complexity and price. Single or 2-string boxes are cheaper, while 4–6 string boxes cost more. Voltage and Current Ratings: Higher DC voltage (up to 1000V or 1500V) and higher amperage capacity increase the cost.

Protection Features: Built-in surge protection, lightning protection, and DC/AC breakers add to the price. Material and Durability: IP65 or IP66 rated enclosures made from ABS, PC, or metal are more expensive due to weatherproofing and corrosion resistance.

Monitoring and Anti-

Reverse Functions: Boxes with real-time monitoring or anti-reverse diodes are priced higher due to added electronics and safety features. Installation and Accessories: Some packages include circuit breakers, surge protection devices, and mounting hardware, which can affect the total cost.

Summary

For residential solar systems, expect to pay $100–$150 for a standard 2–3 string PV combiner box with basic protection. For commercial or industrial applications, prices can rise to $200–$300+ depending on the number of strings, voltage, amperage, and additional features. Considering durability, IP rating, and included accessories is important for long-term reliability and safety of the solar installation (Sunnom).