This guide gives you the diagrams for each configuration, the decision matrix, the wire gauge chart, and the step-by-step for connecting 2, 3, or 4 panels. I wired my own 6 kW grid-tie array in 2024 — 14 panels in two series strings of 7, feeding a dual-MPPT inverter. When you have multiple solar panels, you have to connect them somehow to build a system. In this article, we'll take a close look at a latter type: here is a short step-by-step guide on how to connect solar panels in series. Each affects voltage, current, and performance differently, making them suitable for various solar installations. In this guide, we focus on. Connecting solar panels to form a functional array is a fundamental process in any photovoltaic system, and series wiring is one of the two primary configuration methods.