Support & Service Center

Empowering your connections. Whether you bought a standard cable, need small-batch wholesale, or are developing a highly customized OEM prototype, our engineering and support teams are here to help.



Sunluytom

Standard Wire Harnesses

Applications: E-Motorcycle standard replacements, standard solar MC4 extensions, basic battery cables.

Support: Downloadable Pinout Diagrams; Step-by-step waterproof connector assembly videos; Instant replacement requests for retail orders.

Sunluytom

Highly Customized & Non-Standard

Applications: Concept E-Motorcycles, proprietary Home Energy Storage walls, unique solar farm grids.

Support: Prototype Validation (Submit feedback for your 1-set custom order); Design Revisions (Upload updated requirements); Scaling Up (Start OEM Onboarding for 100+ pcs).

Warranty & Returns FAQs

A: All standard wire harnesses sold via our Shopify store come with a 12-month standard warranty covering manufacturing defects, terminal crimping failures, and IP-rating compromises under normal use.

A: Because custom harnesses (from 1-piece prototypes to OEM batches) are built exclusively to your specifications, they are non-refundable. However, if the product fails to meet the agreed-upon CAD drawing or fails our 100% continuity test, we will rework or replace it free of charge.

A: We offer a 30-day hassle-free replacement for standard products. Please submit a ticket with your Order ID and a clear photo of the damage, and we will ship a replacement within 24 hours.

A: For applications exposed to harsh environments, please provide photos showing the installation context. Our engineers need to verify that the cables were routed correctly to validate the warranty claim.

Open a Support Ticket

Empowering your connections. Whether you bought a standard cable, need small-batch wholesale, or are developing a highly customized OEM prototype, our engineering and support teams are here to help.