Solar Wire 6mm Black is a 6mm solar cable for the negative side of each PV string. Homeowners, farms and installers across South Africa run it on new arrays. Browse our full Solar Cable range.
Most orders follow a new panel string, an inverter upgrade or an installer quote by the metre. Businesses, factories and off-grid properties use the same cable on larger arrays.
Why Choose Solar Wire 6mm Black
- Black jacket marks every negative run.
- Sized for PV strings, not battery leads.
- Free system sizing and quotes included.
What 6mm PV Cable Is For
PV strings carry DC power from the panels to the inverter’s PV input. This cable handles that run on hybrid, off-grid and grid-tied inverters.
Pick one colour per pole and keep it on every run. On site, we use black for every negative and red for every positive. Clear polarity speeds up fault-finding, because each string is easy to trace at the combiner box.
South African roofs get hot in summer, so string cable must cope with heat and UV. Your quote confirms the cable size for each string, based on run length and system design.
Compatibility And Fit With Your Array
Pair it with the red 6mm PV cable so polarity stays clear. Each end takes an MC4 solar connector at the panel and combiner box.
Strings feed a 2-string combiner box with 1000VDC solar fuses. Larger arrays suit other solar combiner boxes. Spares sit in our solar connectors range.
Cable and MC4 fittings sit under Cables & Connectors. Crimp each MC4 with the correct tool, because loose crimps heat up on sunny days. This wire for solar strings won’t replace 35mm battery cable or suit AC mains.
Planning Your String Cable Runs
Good planning keeps every run short, tidy and easy to inspect. Measure each string before you order, so the cable arrives in the right lengths.
- Measure panel to combiner box for each string.
- Add the combiner box to inverter run.
- Order black and red in equal lengths.
- Count MC4 ends at every panel and combiner box.
Route cable away from sharp roof edges and secure it along the mounting rails. Leave enough slack at each panel for clean MC4 connections.
Best Use Cases For PV Strings
- Homeowners adding a new roof string.
- Farms wiring off-grid arrays.
- Installers handling inverter upgrades.
Businesses and factories use it when adding strings to larger rooftop arrays. Match solar panel wire to our PV panel range. Our solar installation team can wire it.
Warranty Compliance And Trust
Thin or non-UV cable risks voltage drop, overheating and a failed inspection. Installers must wire DC runs to SANS 10142-1 under the electrical installation regulations. Check the jacket against the IEC 62930 standard.
A registered person issues the Certificate of Compliance after commissioning. Grid-tied systems also need SSEG registration with your local municipality.
We bring 13 years of experience and 500+ completed projects. Installations include a 12-month workmanship warranty, confirmed with your quote. Expect nationwide delivery in 2 to 5 working days.
Collect stock at our Midrand, Bloemfontein, Cape Town, Durban or Gqeberha pickup points. Pay by EFT, card, cash or PayFast. We offer a 7-day return period.
Order Solar Wire 6mm Black or request free solar quotes on how to wire solar panels. Contact our sales team to check stock.
Last Updated: October 2026
