This guide covers the fundamentals of solar panel wiring for licensed installers: how series, parallel, and hybrid configurations work, when each is the right call, how to build a permit-ready string diagram, what field installation practices trigger the most inspection. This guide covers the fundamentals of solar panel wiring for licensed installers: how series, parallel, and hybrid configurations work, when each is the right call, how to build a permit-ready string diagram, what field installation practices trigger the most inspection. Parallel wiring adds current. Those three sentences cover every solar wiring decision you will ever make. Series: connect positive (+) to negative (−) between panels — voltages add, current stays the same. Let's get into further details. What to Consider Before Wiring Your Solar Panels? Before. There are three wiring types for PV modules: series, parallel, and series-parallel. Learning how to wire solar panels requires learning key concepts, choosing the right inverter, planning the configuration for the system, learning how to do the wiring, and more. Wiring solar panels together incorrectly can lead to damaging or destroying valuable components — it can even be. One very important step when constructing your own solar setup is putting together a solar panel wiring diagram (or schematic). This will essentially serve as your map as you connect all of your components.