List & Promote Your Business to the Right Audience — Starting at $100
EV Charging & Components
Compare the top ev high-voltage wiring harnesses suppliers for 2026 — vetted manufacturers and vendors in the EV Charging & Components category, with sourcing and certification guidance for US buyers.
TE Connectivity manufactures high-voltage cable assemblies, AMP+ connectors, and robust power distribution harnesses engineered for electric drivetrains, hybrid powertrains, and fast-charging systems.
Visit website →Aptiv engineers shielded high-voltage wiring harnesses, busbars, and power distribution systems designed to withstand extreme thermal environments in commercial and passenger electric vehicles.
Visit website →Yazaki supplies high-voltage wiring harnesses, service disconnects, and connectors for electric and hybrid vehicles, ensuring safe, high-amperage power transmission from batteries to e-motors.
Visit website →Sumitomo Electric produces high-voltage wiring harnesses and lightweight aluminum cable systems built for EV battery packs, inverter connections, and high-current onboard power architectures.
Visit website →LEONI provides tailored high-voltage cable harnesses, specialized HV wiring systems, and battery interconnect assemblies engineered for battery electric vehicles and automated charging docks.
Visit website →Lear develops integrated high-voltage wiring assemblies, electrical architecture systems, and battery pack wire harnesses that deliver safe power transfer for electric vehicle platforms.
Visit website →Rosenberger manufactures high-voltage interconnect assemblies, HVR connectors, and EMC-shielded power harnesses tailored for electric vehicle drivetrains and fast-charging infrastructure.
Visit website →Amphenol designs custom high-voltage wire harnesses, Radsok power connectors, and high-power charging cable assemblies supporting demanding hybrid and all-electric vehicle applications.
Visit website →Huber+Suhner produces RADOX high-voltage cable harnesses, cooled charging cable assemblies, and specialized onboard powertrain connection systems designed for electric transport and charging.
Visit website →Furukawa Electric manufactures lightweight high-voltage automotive wire harnesses, aluminum alloy cables, and battery terminal connectors for commercial and passenger electric vehicles.
Visit website →This page profiles 10 suppliers of ev high-voltage wiring harnesses that serve US original-equipment manufacturers, charge-network operators and fleet buyers. We weigh manufacturing maturity (ISO 9001 / IATF 16949 where relevant), certification coverage such as UL, CE and UN38.3, lead time and minimum order quantity, spare-parts and firmware support, and the ability to sign US procurement terms including warranty, NDA and EOL plans.
Companies featured on this list include TE Connectivity, Aptiv, Yazaki Corporation and Sumitomo Electric Industries.
Sourcing footprints on this list span Schaffhausen, Switzerland, Dublin, Ireland, Tokyo, Japan and Osaka, Japan. That lets you decide between onshore US suppliers, Asian manufacturers priced for volume, and European suppliers that often lead on automotive-grade quality.
Qualification usually follows the same arc regardless of product: a technical datasheet review, a sample or small-batch build, in-house test and integration, then a pilot batch before you commit to volume. Budget for that cycle to take 6–14 weeks per supplier on this list.
Cost depends heavily on volume and spec. For modular power and controller hardware, unit costs typically sit in a $34–$168 range at small volumes and fall by 15–40% as you move to container or reel quantities. Ask for a cost breakdown by BOM, assembly and test so you can compare suppliers on structure, not just sticker price.
Always request the spec in writing: ambient and thermal ratings, IP class, communication stack (OCPP, ISO 15118, CAN), firmware update path and warranty terms. A supplier that cannot commit these to a datasheet now will be hard to hold to them later.
Before you scale with a ev high-voltage wiring harnesses supplier, verify the compliance and quality posture in writing: UL or ETL certification for the North American market, CE marking for Europe, REACH and RoHS declarations, and — for anything with a lithium battery or high-voltage electronics — UN38.3 transport testing and an IEC 62196 / 61851 conformance statement where applicable.
Supply-chain risk matters as much as certification. Ask for component sourcing maps, single- versus dual-sourced critical parts (chips, connectors, power semiconductors), inventory depth for long-lead items, and a documented EOL/obsolescence plan. For anything that goes into a charge network, confirm the controller talks OCPP 1.6J or 2.0.1 and that firmware updates are versioned and remote-deployable.
For US buyers, also confirm the supplier can meet your indemnity, warranty and recall-remediation expectations in a written agreement — many overseas suppliers will match an open PO and datasheet but push back on liability clauses.
Run these questions past two or three suppliers from this page and compare the written answers — the depth of the response is a reliable early signal of whether they can support a volume programme.
Based on the 10 companies profiled on this page, TE Connectivity, Aptiv and Yazaki Corporation are strong options for US buyers. Shortlist two or three, request samples and datasheets from each, and compare certification, lead time and warranty terms before committing to a pilot build.
Costs scale with volume and specification. In small volumes unit pricing typically sits in the tens of dollars per unit for controller and power-module hardware, falling 15–40% at volume. Always request a cost breakdown by BOM, assembly and test so you can compare suppliers on structure rather than headline price.
Choose US suppliers when you need fast logistics, local support and easy legal recourse; Asian manufacturers when cost per unit at volume is the priority; and European suppliers when you need automotive-grade quality and documentation. Many programmes combine a volume Asian source with a qualification partner closer to home.
For the North American market expect UL or ETL certification, CE marking for Europe, REACH and RoHS declarations, and UN38.3 transport testing for anything with a battery or high-voltage electronics. Where the part interacts with charging standards, confirm IEC 62196 / 61851 conformance and OCPP or ISO 15118 support.
A typical qualification cycle is 6–14 weeks: datasheet review, sample or small-batch build, in-house test and integration, then a pilot batch. Longer if the part needs custom firmware or new certification. Ask every supplier for a written timeline up front so you can compare.
