Wiring 2 Solar Panels Together

Solar panel wiring aka stringing and how to string solar panels together is a fundamental topic for any solar installer.

Wiring 2 solar panels together.

The connection of multiple solar panels in parallel arises from the need to reach certain current values at the output without changing the voltage. Wiring solar panels in series. Solar panels are usually connected in series to obtain higher output voltage. There are two ways to wire up solar panels.

When a solar installer wires your solar panels in a series each panel is connected to the next in a string the total voltage of each solar panel is summed together but the amps of electrical current stay the same. Connect all the positive terminals of all the solar panels together and all the negative terminals of all the panels together. The following wiring diagram shows that the two 12v 10a 120w solar panels connected in parallel will charge the two 12v 100ah parallel connected batteries as well as power up the ac load through batteries and inverter during the day in normal sunshine. You have two different higher voltage solar panels i e one 100w 24v and one 200w 24v that you want to connect to the already working 12 v solar power system comprising the two 12v 50 w solar panels connected in parallel from the previous scenario see the picture above.

Both have their own purpose and applications and both have different outcomes when hooking up solar panels of different wattage together. Firstly lets take a look at connecting solar panels in series. You need to understand how different stringing configurations impact the voltage current and power of a solar array. If you had 4 solar panels in parallel and each was rated at 12 volts and 5 amps the entire array would be 12 volts at 20 amps.

Wiring solar panels in a parallel circuit. When you wire in series there is just a single wire leading from the roof for each string. Wiring solar panels in parallel causes the amperage to increase but the voltage remains the same.