1. Standards
What to look for in the standards.
Regarding industry standards, the landscape is as follows: EN 50618 (commonly required for the European market; many manufacturers design products to comply with both EN 50618 and IEC 62930); IEC 62930 (the standard for 1.5 kV DC photovoltaic system cables—specifically copper conductor cables—adopts IEC 62930:2017; it covers tests for insulation and sheath materials, compatibility, ozone resistance, and UV resistance); IEC 62930 (IEC Webstore: IEC 62930:2017 covers single-core, cross-linked insulated and sheathed power cables for PV systems with a rated DC voltage up to 1.5 kV); EN 50618 (published by CENELEC as the European implementation of the technical framework; the standard most frequently cited on TÜV Rheinland certificates); UL 4703 (the North American standard; it mandates thicker insulation and permits direct burial and aluminum conductors, whereas EN 50618 strictly requires tinned copper conductors and Low Smoke Zero Halogen [LSZH] insulation); TÜV 2PfG 1169 (EN 50618:2014 and TÜV 2PfG 1169/08.2007 are the most widely accepted in Europe; UL 4703 applies to the USA and Canada; IEC 62930 is the international standard).
62930, EN 50618, UL 4703, TÜV 2PfG 1169—six standards fully met.
II.
Testing
What to look for in testing?
Based on testing practices, the focus is as follows: UV—Yangzhou Spring Cable (UV aging resistance test for finished cables per HD 605/A1 or UL1581; total test time 720h; cycle: 18 min water spray, 102 min xenon lamp drying; chamber temp 63°C, humidity 65%, wavelength 300–400 nm); Ozone—National Group Standard (Ozone resistance test for high-altitude, high-weather-resistance PV cables; ozone concentration 200 pphm, temp 40°C, duration 96h; no visible cracks under 2x magnification); Thermal Cycling—National Group Standard (Temperature cycling test: -40°C ±2°C for 4 hours to +120°C ±2°C for 4 hours, 30 cycles; no cracking or deformation); Voltage—National Group Standard (Electrical stability test under low air pressure; withstand voltage test at low pressure corresponding to specific altitude—approx. 62 kPa; 6.5 kV for 5 minutes without breakdown); Aging—ZMS (Every batch passes UV aging 500h xenon arc, ozone resistance, cold bend -40°C, high-voltage test 6.5 kV AC, flame retardancy IEC 60332-1, ozone concentration 250–300 pphm for 24h with no cracking at 180° bend); Cold Bend—wxsxcable (Cold bend performance down to -40°C, insulation resistance under wet conditions)—Six testing criteria: UV, ozone, thermal cycling, voltage, aging, and cold bend—all fully verified.
III. Certification
What to look for in certification.
Based on industry practice, the key aspects are: PV1-F—wxsxcable (The TÜV Rheinland PV1-F standard is arguably the most recognized benchmark for solar cables; TÜV-approved solar cables bearing the PV1-F mark have passed comprehensive testing, including a minimum of 1,000 hours of UV resistance; the “F” designation specifically indicates flame-retardant properties; wxsxcable); TÜV—Douyin Encyclopedia (Photovoltaic cables exported to Europe alongside other PV components must comply with the TÜV Mark certification issued by TÜV Rheinland; in late 2012, TÜV Rheinland Germany introduced a series of new standards for PV-compatible components, covering 1.5kV DC single-core cables and PV AC multi-core cables; Douyin Encyclopedia); EN 50618—Made-in-China (10mm² Photovoltaic Solar Cable TUV UL H1Z2Z2-K; fire resistance per IEC 60332-1; smoke emission per IEC 61034/EN 50268-2; low fire load per DIN 51900; Made-in-China); TÜV—Jiukai Cable (Dual TÜV-certified PV cables—EN 50618/IEC 62930—have received authoritative TÜV recognition; strictly compliant with EN 50618 and IEC 62930 standards; Jiukai Cable); Standards—Lapp (EN 50618 establishes an expected lifespan of 25 years under the normal operating conditions defined therein; Lapp); Crush Resistance—Lapp (Suitable for direct burial; the cable passes crush and impact resistance tests in accordance with UL 854, Chapters 23 and 24; Lapp)—Six key certification factors: PV1-F, TÜV, EN 50618, TUV, Standards, and Crush Resistance; these six factors ensure comprehensive certification coverage.
IV.
Materials
What to look for regarding materials. Based on practical application, here is what to check: XLPO—Jiukai Cable (uses highly weather-resistant cross-linked polyolefin material; adaptable to environments from -40°C to 90°C; maximum conductor temperature of 120°C); Halogen-free—UL Solutions (EN 50618 requires flexible Class 5 EN 60228 halogen-free cables from 1.5 to 240mm²; IEC 62930 has a broader scope covering both stranded cables from 16mm² and flexible stranded cables from 1.5mm² up to 400mm²); XLPO—Jianyun Cable (XLPO insulation; TUV certified; EN50618 standard; ozone resistance compliance); Tinned copper—FRCABLE (EN 50618 strictly requires tinned copper conductors); Hydrolysis resistance—Suntree (German-standard TUV photovoltaic cables designed to withstand UV exposure, ozone, hydrolysis, and temperature extremes while remaining halogen-free and low-smoke; design life matches the 25-year lifespan of solar panels); Sheath—Douyin Encyclopedia (test cycle: 18 min water spray, 102 min xenon lamp drying; temperature 65±3°C; relative humidity 65%)—Six material aspects to check: XLPO, Halogen-free, XLPO, Tinned copper, Hydrolysis resistance, and Sheath; covering these six points ensures material quality.
V.
Applications
What to look for regarding applications.
Practical application perspectives: Lifespan—Suntree (Solar wire/cable engineered specifically for the harsh conditions of photovoltaic installations, with a design life matching the 25-year lifespan of the solar panels themselves—Suntree); Global—Solencia (IEC 62930 is an international standard specifying requirements for cables intended for photovoltaic systems; it complements EN 50618 by addressing aspects such as resistance to environmental conditions specific to solar installations; particularly relevant for new installations—Solencia); Grid-connected—leadersolar (IEC 62930 international standard; 1,500 V DC voltage rating; global acceptance aligned with EN 50618; UV and ozone resistant; mandatory for grid-connected photovoltaic systems—leadersolar); DC—IEC Webstore (Cables for use on the DC side of photovoltaic systems—IEC); Certification—Made-in-China (Approvals: EN 50618:2014; Application standards: EN 50618:2014; Model: H1Z2Z2-K—Made-in-China); Weather resistance—National Standard Information Public Service Platform (Specifies test methods including low-temperature impact, dynamic cut-through, and UV resistance tests—National Standard Info…
