Just in case, you have two solar panels with the same power and voltage, you can easily connect them parallelly. All you have to do is to wire the positive pole of one panel to the positive pole of another panel. Then, connect the negative poles of the two panels. To establish these connections, you need MC4 Y-branch solar connectors. Only a few panels with the opportunity to expand come with this connector. If not available, buy the connector separately. The power generation ability of both panels will be at their best when you place them close to each other. Also, ensure that they are oriented to the sun at the same angle. Also, according to the distance of the panels, ensure the selection of the most suitable section of electric cable.