Wiring solar panels in parallel implies connecting positive terminals of each panel together and wiring the negative terminals of each panel together as well. Then, they are connected to the charge controller or t. The series connection is done by wiring the positive terminal of each panel to the negative. We have described the advantages and disadvantages of the series and parallel connections of solar panels, but what happens when we combine them together? It is often necess. There is another important topic related to the selection of one or another type of connection in the solar PV system. Do your solar panels share the same electrical characteristics?.