Genuine 4mm² solar PV cable sells for J$200 per foot at BTECH in Ocho Rios, with 6mm² at J$250 per foot — and choosing between them is a maths decision, not a guess, because undersized cable silently burns your production as heat.
Prices below are BTECH shelf prices as of mid-2026 and can change — live JMD prices with stock levels are always at btechj.com/shop.
4mm vs 6mm: the practical rule
4mm² (12AWG) suits shorter runs and typical string currents; 6mm² (10AWG) earns its extra J$50/ft on longer runs and higher-current strings, where voltage drop would otherwise eat several percent of your harvest — permanently. On a 25-year system, cable is the cheapest insurance you will ever buy.
Why real PV cable (not ordinary wire)
PV cable is double-insulated, UV-stabilised and rated for decades on a tropical roof. Ordinary household wire cracks in the sun and fails inspections. Every foot BTECH stocks is true PV-rated cable.
The connectors matter too
Pair cable with proper MC4 connectors (J$250/pair at BTECH) and an inline fuse where strings parallel (MC4 30A fuse, J$2,000). Loose or fake MC4s are among the most common causes of solar fires.
FAQ
How much cable does a typical installation need?
Commonly 100–200ft depending on roof-to-inverter distance — J$20,000–J$40,000 at 4mm pricing. We calculate exact runs free with your quote.
Do you sell by the foot or by the roll?
Both — by the foot over the counter, roll pricing for installers.
Is 4mm cable in stock?
Yes — thousands of feet, live count at btechj.com/shop. Call 876-777-5488.
