Connectors
PV connector design, intermateability and failure
Articles
- How a Small MC4 Connector Has Stayed on Top in PV for Twenty YearsThe connector is the humblest line on a module's bill of materials, yet many overseas projects specify \"Original MC4\" by name. We look at its history, the physics of contact resistance, its four lines of defence, the same-maker rule and installation practice, plus newer developments such as the 2000 V version and Sandia's 2025 teardown study.
- MC4 vs. MC4-Evo 2: What Is Actually Different?MC4 and MC4-Evo 2 both come from Stäubli and mate with each other, yet their ratings differ. Checked against the latest datasheets, we explain the four real differences (voltage, current, temperature and materials, cable sealing and assembly), what has not changed, the "lower rating applies" rule for mixing, and how to choose and identify them on projects.