Products Supplied:
- JZD H1Z2Z2-K Photovoltaic Cables (TÜV Certified, EN 50618)
- JZD YJV 0.6/1kV Power Cables (for main distribution)
- JZD BVR Building Wire (for classroom internal wiring)
Specifications & Quantities (Preliminary):
- H1Z2Z2-K Solar Cable: 1x4mm² — 2000 m; 1x6mm² — 2000 m; 1x10mm² — 2000 m
- YJV Multi-Core: 4x25mm², 3x16mm²+1x10mm² — 2000 m
- BVR Building Wire: 2.5mm², 4mm², 6mm² — 5000m each
Client: Solomon Islands Ministry of Education
Project Name:Rural School Solar Electrification Program, Solomon Islands
Project Commencement Date:2025.2
Project Status: Completed
Project Details & Narrative:
Background — Powering Education in Remote Islands
Across the Solomon Islands’ 900+ islands, many rural schools lack reliable grid electricity. Classrooms rely on diesel generators — expensive, polluting, and prone to fuel supply disruptions. Solar photovoltaic (PV) systems offer a transformative solution: reliable, sustainable power for lighting, fans, computers, and educational equipment.
In early 2025, a multi-school solar electrification program was launched, targeting one schools across two islands. The program was funded by development partner and aid agency and implemented by 3 contractors.
The Cable Challenge — Solar in the Tropics
Solar installations in tropical island environments impose unique demands on cables:
- UV Resistance: Rooftop solar cables are exposed to intense equatorial sunlight year-round — standard PVC cables would embrittle and crack within years
- High Ambient Temperature: Roof-mounted cables must handle continuous operation above 70°C without degradation
- Moisture & Salt Resistance: Coastal schools face salt spray corrosion, and tropical rainfall demands water-blocking cable construction
- Rodent Protection: Rural school installations risk rodent damage to exposed cables
- Long Cable Runs: Solar arrays on school roofs connect to inverters and battery banks often located in separate buildings — requiring low-resistance cables to minimize power losses
Why H1Z2Z2-K Cables?
H1Z2Z2-K is the European standard for photovoltaic system cabling under EN 50618, specifically engineered for solar applications and recognized globally by development agency specifications:
- Cross-linked polyolefin insulation with XLPE outer sheath: Rated -40°C to +120°C, far exceeding PVC in heat and UV resistance
- Halogen-free, flame-retardant: Critical for occupied school buildings
- TÜV certified (EN 50618 / IEC 62930): Internationally recognized certification required by development agency specifications
- Double-insulated construction (Class II): Enhanced safety for exposed rooftop installations, no separate earth required
- 1.5kV DC rated: Suited for modern string inverter system voltages
How JZD Cable Won the Bid
JZD Cable’s solar cable expertise was the decisive factor:
- Core Competency in Solar: H1Z2Z2-K is one of JZD’s flagship export products, with established production lines, testing protocols, and TÜV certification already in place — not a side product manufactured on demand.
- Proven Tropical Performance: JZD’s H1Z2Z2-K cables were already performing successfully in solar installations across Southeast Asia and the Pacific, with documented field performance data.
- Complete Package Supply: JZD offered H1Z2Z2-K solar cables, YJV distribution cables (solar inverter to school distribution board), and BVR building wire (classroom lighting and outlets) — a single-source solution reducing procurement complexity.
- Competitive Pricing at Scale: Manufacturing all three cable types in-house enabled competitive volume pricing across the multi-school program.
- Development Project Experience: JZD demonstrated familiarity with international development project requirements — documentation standards, compliance reports, and transparency in procurement.
Installation & Performance
The solar systems were installed across the target schools throughout 2025. Each school’s system includes rooftop PV arrays (H1Z2Z2-K cables), inverter-to-distribution board connections (YJV cables), and classroom wiring (BVR building wire).
Post-installation monitoring shows:
- Solar generation meeting or exceeding design estimates
- Zero cable-related faults or degradation after two months
- Schools reporting reliable daytime electricity for lighting, fans, and computers
- Significant reduction in diesel fuel costs and generator maintenance
Strategic Significance
This project positions JZD Cable as a qualified solar cable supplier for international development-funded electrification programs — a growing market segment as Pacific Island nations pursue renewable energy goals.
JZD Cable H1Z2Z2-K Solar Cable Highlights:
| Property | Specification |
|---|---|
| Conductor | Tinned copper, Class 5 flexible |
| Insulation | Cross-linked polyolefin (halogen-free, XLPE) |
| Outer Sheath | Cross-linked polyolefin (halogen-free, UV-resistant) |
| Rated Voltage | 0.6/1kV AC; 1.5kV DC |
| Temperature Range | -40°C to +120°C (at conductor) |
| Flame Retardant | IEC 60332-1 |
| Certification | TÜV EN 50618 / IEC 62930 |
| Expected Service Life | 25+ years |
About JZD Cable
JZD Cable is a leading Chinese manufacturer of photovoltaic cables, exporting TÜV-certified H1Z2Z2-K solar cables to markets worldwide. Our Shenzhen factory produces solar, power, and building cables under ISO 9001 quality management, with products deployed in residential, commercial, and utility-scale solar installations across Southeast Asia, the Pacific, Africa, and beyond.
