Custom Solar WireHarnesses & PV Cable
Photovoltaic cable assemblies engineered for panel arrays, inverters and battery storage — UL 4703 PV wire, 1500V DC rated, MC4-terminated and built for 25+ years of outdoor service.
What makes a solar wire harness different
A solar wire harness is not ordinary cable cut to length. A photovoltaic array spends 25+ years outdoors under UV, heat, cold, moisture and thermal cycling, while carrying DC at system voltages up to 1500V. General-purpose hook-up wire degrades, cracks and fails in that environment — so PV harnesses use solar-grade materials, validated connectors and tested terminations from the start.
Across a system the wiring changes job at every stage: module jumpers and string leads on the array, combiner-box harnesses gathering strings, power cable into the inverter and power-conditioning equipment, high-current interconnects for battery energy storage, and shielded comms back to monitoring and tracker controls. We build all of these as custom, pre-terminated assemblies — so your installers bolt them on instead of field-crimping MC4 connectors on a rooftop or in a field. For the deeper engineering detail, see our solar energy wire harness guide.
Solar applications we wire
UV-resistant cable assemblies for every stage of a PV + storage system
PV Panel Arrays & String Wiring
Module-to-module jumpers, string leads and combiner-box harnesses for residential, commercial and utility-scale arrays. Built with double-insulated UL 4703 PV wire and pre-terminated MC4 / MC4-EVO2 connectors so installers drop them straight onto the racking.
Battery Energy Storage (BESS)
High-ampacity battery interconnects, rack busbar cables and BMS sense harnesses for grid-tied and off-grid storage. Flexible fine-stranded copper handles repeated handling and vibration without conductor fatigue.
Inverter & Power Conditioning
AC/DC power cables and control harnesses for string inverters, microinverters, optimizers and power-conditioning units. Low-loss conductors and optional foil+braid shielding keep MPPT and comms signals clean next to switching power stages.
Monitoring, Tracking & Control
Communication and sensor cables for monitoring platforms, single-axis trackers, irradiance sensors and SCADA/data-acquisition equipment — shielded twisted pairs that run long distances across an array without picking up noise.
Built solar-grade, layer by layer
Conductors
Tinned, fine-stranded copper for corrosion resistance and flex life — sized for ampacity and voltage drop across long array runs.
Insulation
Cross-linked (XLPE/XLPO) UL 4703 PV-wire insulation, plus USE-2 and EN 50618 (H1Z2Z2-K) options for the dielectric strength a 1500V DC system demands.
Jacket
UV-, ozone- and moisture-resistant jackets rated for 25+ years of direct sunlight, with -40°C cold-bend and +90°C continuous service.
Connectors
Factory-terminated MC4 / MC4-EVO2 / Amphenol H4 connectors with IP67/IP68 sealing and verified contact resistance — no field crimping required.
Solar-grade technical capabilities
UL 4703 / IEC 62930 construction with UV-resistant materials, validated for long-term outdoor and 1500V DC service.
Why choose our solar wire harness services
PV cable assemblies that pass inspection and last as long as the modules
Solar-Grade Materials
UV-resistant XLPE insulation and tinned copper conductors engineered for 25+ years of outdoor exposure — not repurposed general-purpose wire.
UL 4703 / TÜV / IEC 62930 Compliant
PV wire and assemblies built to the international photovoltaic standards (UL 4703, UL 9703 for PV wiring systems, IEC 62930 / EN 50618) that AHJs and EPCs require.
1500V DC Engineering
Dielectric, spacing and insulation choices validated for modern 1500V DC string architectures, not just legacy 600/1000V systems.
100% Electrical Test
Every harness gets continuity and Hi-Pot (dielectric withstand) testing, with MC4 contact-resistance checks, before it ships.
Solar industry standards
Our PV cable assemblies are built to the international photovoltaic standards inspectors, EPCs and AHJs require.
Solar wire harness FAQ
What wire and insulation do you use for solar harnesses?
We build with UL 4703 photovoltaic (PV) wire — tinned, fine-stranded copper with cross-linked UV-resistant insulation. For European and IEC projects we also supply EN 50618 (H1Z2Z2-K) solar cable and USE-2. Conductor sizes run from 14 AWG up to 4/0 AWG depending on array current and voltage-drop targets.
Are your solar cable assemblies rated for 1500V DC systems?
Yes. Our PV wire and harness construction is rated for systems up to 1500V DC, which is standard for modern utility-scale and most commercial arrays. We select insulation thickness, conductor spacing and connectors validated for 1500V rather than only legacy 600/1000V ratings.
Which connectors do you terminate for solar?
We factory-terminate MC4 and MC4-EVO2 connectors, plus Amphenol H4 and equivalents, with IP67/IP68 sealing. All terminations are crimped and tested in-house (including contact-resistance checks), so installers do not field-crimp connectors on the racking.
What certifications do your solar harnesses meet?
Our PV wire and assemblies are built to UL 4703 (PV wire), UL 9703 (distributed-generation wiring harnesses), and IEC 62930 / EN 50618 for international projects, manufactured under our ISO 9001 quality system with TÜV-recognized materials.
How long will the cables last outdoors?
Solar-grade jackets and UV-stabilized insulation are engineered for 25+ years of direct outdoor exposure, matching typical module warranties. They withstand UV, ozone, moisture, and a -40°C to +90°C temperature range.
Can you handle BESS and battery interconnect cables too?
Yes. Alongside array and inverter wiring we build high-ampacity battery interconnects, rack busbar cables, and BMS sense harnesses for grid-tied and off-grid energy storage — combining power and signal in a single tested assembly.
What is your MOQ and lead time for solar projects?
We support prototypes from 1–10 pieces with 7–10 day sample lead times, scaling to production batches (typically 500+ units, negotiable). This lets developers validate a harness on real racking before committing to volume.
Do you offer design support for solar harnesses?
We do not provide standalone design services, but our engineering team gives DFM feedback on your existing drawings — connector selection, conductor sizing for voltage drop, strain relief, and labeling — to optimize manufacturability and cost.
Ready for your solar wire harness project?
UL 4703 PV cable, MC4-terminated and 100% electrically tested, with 7–10 day samples. Talk to our solar specialists.
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