HS Code for Solar Combiner Boxes
The HS Code for solar combiner boxes is 853710. The MFN duty rate for importing to the US is 2.7%.
| HS Code (6-digit) | 853710 |
|---|---|
| US Duty Rate (MFN) | 2.7% |
| EU Duty Rate (MFN) | 2.1% |
| Chapter | 85 |
| Heading | 8537 |
| Last Updated | 2026-05 |
Description
Boards, panels for voltage not exceeding 1000V
HS Code 853710 covers solar combiner boxes, which are electrical panels for voltages not exceeding 1000V, with a US MFN duty rate of 2.7%.
Frequently Asked Questions
How does the material composition of a solar combiner box's enclosure affect its classification under HTS 853710?
The enclosure material is critical for proper classification. Boxes with enclosures made primarily of plastic or non-metallic composite materials are typically classified in heading 8537 (electrical control apparatus). If the enclosure is predominantly a metal housing that provides structural support or functions as a significant mechanical component, it may be classified elsewhere, such as in heading 8501 for electrical machinery housings, potentially altering the duty rate.
What specific customs risks are associated with importing Solar Combiner Boxes under HTS 853710?
The primary risk is misclassification, as combiner boxes with surge protection devices or communication modules could be argued by customs to belong under HTS 8536 as electrical apparatus for switching/protection. To mitigate this, ensure your commercial invoices and technical datasheets clearly specify that the unit is a 'panel' for connection and distribution only, with any secondary functions being incidental, to justify classification under 8537.10.
What additional import costs should I budget for when importing solar combiner boxes under HTS 853710?
Beyond the basic customs duty rate, you must account for the Merchandise Processing Fee (MPF), which is 0.3464% of the entered value with a minimum of $29.22 and a maximum of $649.23 per shipment. Importers should also budget for potential anti-dumping/countervailing duties if the solar combiner boxes contain components (e.g., aluminum enclosures) subject to such orders, which can add significant costs.
Material Impact on Solar Combiner Box Classification
The classification of solar combiner boxes under 8537.10 is primarily based on their electrical function, not the enclosure material. Boxes made of plastic, fiberglass, or coated metal (e.g., galvanized steel, aluminum) are all classified here if they perform the same electrical function of combining and protecting photovoltaic string outputs. However, if a unit is imported as just an empty enclosure without internal electrical apparatus (e.g., busbars, fuse holders, surge protection devices), it may be classified elsewhere, such as under 3926.90 for plastic housings or 7326.90 for metal enclosures. The key determinant is whether the box is presented as a complete, ready-to-use electrical apparatus at the time of import.
Alternative & Similar Codes for Solar Combiner Boxes
Solar combiner boxes (8537.10) are frequently confused with electrical enclosures or cabinets classifiable under 8536.50 or 8538.90. The key distinction is that 8537.10 requires the box to be specifically designed for photovoltaic use and contain internal electrical apparatus like fuses or surge protection. A bare enclosure housing only wiring and terminals, without such apparatus, typically falls under 8536.50. Furthermore, if the unit integrates a significant power conversion function (e.g., a micro-inverter), it may be classified as power supply equipment under 8504.40.
Related HS Codes
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