DC Extension Cable MC4 — 4m

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Overview

Why this product

The longest MC4 extension in the range at four metres — for the awkward installs where the module and its inverter ended up genuinely far apart.

When you need four metres

Detached arrays are the usual reason. A pair of modules on a shed roof feeding an inverter mounted on the wall below. A carport section wired back to equipment on the adjacent structure. A ground-mount row where the inverter had to sit at the accessible end rather than mid-row. In each case the distance is real and structural, not a mounting compromise you can design out.

The point where you should stop extending

Four metres is near the sensible limit for a module-to-inverter DC run. If your layout needs substantially more than this, the answer is usually to move the inverter rather than to keep adding cable. Microinverters are designed to live at the array — that is the entire architecture. Long DC runs back to a distant inverter reintroduce exactly the problem module-level electronics exist to eliminate, and every extra metre is more cable exposed to weather, wildlife and mechanical wear for the life of the system.

Practical notes

Long spans need proper support — plan the route and the fixings before you pull the cable
Where the run leaves the array structure, protect it: conduit, cable tray, or routing beneath the frame
Rodent damage to exposed PV cable is a genuine and frequently underestimated failure mode on ground mounts and outbuildings
Keep positive and negative together along the whole run

Also available in 1m, 2m and 3m. If you find yourself needing more than 4m, get in touch — there is usually a better layout.