(805) 691-8000 michael@solarearthinc.com

Types Of Solar Panel Connections

Considering solar panels for your home, it’s important to understand the connections available. This blog post will discuss three common types of solar panel connections: series, parallel, and series-parallel. We’ll also provide tips on choosing the right connection type for your needs. Read on to learn more!

Series Types Solar Panel Connections: A series connection is the most basic type. In this configuration, each solar panel is connected to the next in a single line. Series connections are typically used for small solar arrays, as they are easy to set up and require less wiring than other configurations.

Parallel Types Of Solar Panel Connections: A parallel connection is similar to a series connection, but each solar panel is connected to its dedicated power source. This connection is typically used for larger solar arrays, allowing each panel to operate independently.

Series-Parallel Types Of Solar Panel Connections: A series-parallel connection combines the two previous types. In this configuration, some solar panels are connected in series while others are connected in parallel. This type of connection is often used for larger solar arrays, as it provides the benefits of both configurations.

Difference Between Types Of Solar Panel Connections Connections

The main difference between the three types of solar panel connections is how the solar panels are connected to the power source. Series connections are the most basic, with each panel connected in a single line. 

Parallel connections are more complex, with each panel having its dedicated power source. Series-parallel connections are a combination of the two, with some panels connected in series and others in parallel.

Brief Explanation Of Solar Panel Connections

Solar panel systems come in several different shapes and sizes. To connect them there are three different methods of connection. Each of these methods is designed for a specific purpose.

Examples include producing a higher voltage or producing a greater amount of current. A solar panel may be connected in series to increase the voltage or connected in parallel to increase the output amperage.

Parallel-wiring multiple solar arrays is a great way to power more devices and better use the roof’s limited space.

Here is a brief explanation of types of solar panel connections with diagrams created by Solar Earth Inc hope this gonna help you to understand types of solar panel connections well.

Connecting Solar Panels in Series

The first method we will look at for types of solar panel connections is wwhat’sknown as “series wiring.” This method increases the total system output voltage. Generally, series-connected solar panels are used when you have a grid-connected inverter or charge controller that requires at least 24 volts.

Wire the solar panel panels together so that the positive terminal connects to the negative terminal. Then connect one more panel to the positive and negative terminals. This creates a working battery.

Solar panels in series add the voltages produced by each panel to get the total output of the series.

Solar Panels in Series Of Same Features

types of solar panel connections

This method uses the same type of solar panel for each set of panels.

All the solar panels have the same type and power rating in this method. The total voltage output will equal the sum of all the panels in the system. By using the same three 6-volt,3.0 amp panels from above, you can see that when these PV panels are connected in series, they will produce a voltage of 18 volts at 3.0 amps, giving a total power output of 54 Watts.

We need to use different types of connectors to connect solar panels in series with different nominal voltages.

Solar Panels in Series Of Further Voltages

In this method, the solar panels have a different maximum power outputs, but all have the same current rating. The array produces 21 volts at 3.0 amps or 63 watts when you connect them in series.

The output power remains constant at 3.0 amps, but the output voltage jumps to 21 volts (5 + 7 + 9).

Finally, let’s examine connecting solar panels in series with different nominal voltages and current ratings.

types of solar panel connections

We Are Connecting Solar Panels Solar Panels in Series of Different Currents

In this method, different types of solar panels have different power ratings. The individual panel voltages add together, but this time the amps will be limited to the value of the lowest panel in the string in the case of 1 A. Then the array will produce 19 Volts (3 + 7 + 9) at 1.0 Ampere only, or only 19 watts out of a possible 69 watts available, reducing the array’s efficiency.

The solar panel is rated at 9 volts, 5A, and we can see from this that it will only use one-fifth or 20% of its maximum current capacity reducing its efficiency and wasting money on the purchase of this solar panel.

types of solar panel connections

Solar Panels Together In Parallel

Parallel wiring is the next step in connecting solar panels. It is similar to the earlier methods, but it requires more wires. Series connection is when the solar panel wires are connected to make a string of panels, while connecting them in parallel means each solar panel has its wire. A parallel connection is the opposite of a series connection.

Solar panels should be connected in series so that each panel supplies power to the next. Connect the positive terminal from one panel to the negative terminal of the next panel, then do the same for all remaining panels.

If you connect the panels in series, the total output voltage decreases, but the output current becomes the sum of the outputs of the individual panels.

Solar Panels In Parallel Of Same Characteristics

types of solar panel connections

This project combines the same three 6-volt, 3-amp panels connected in parallel. The total output of the panels remains the same, 6 volts, but the total amperage has increased to 9.0A (3 + 3 + 3), which means that the project is running at 54 watts at full sun.

But what if our newly acquired solar panels are non-identical? How will this affect the other panels? We have seen that the currents add together, so there is no real problem there, just as long as the panel voltages are the same and the output voltage remains constant—LLet’slook at connecting solar panels in parallel with different nominal voltages and different current ratings.

There is an important consideration here because how one array operates can influence the operation of the other arrays. We’re in good shape when the panel’s voltage is equal, and their currents add up.

Solar Panels In Parallel With Further Voltages and Currents

types of solar panel connections

The parallel currents add up as before, and the voltage adjusts to 3 volts. Parallel solar panels must have the same output voltage to be useful in parallel. If one panel has a higher voltage, it will supply the load current to the degree that its output voltage drops to that of the lower voltage panel.

We can see that the solar panel rated at 9 volts, 5 A, will only operate at a maximum voltage of 3 volts as its operation is being influenced by the smaller panel, reducing its efficiency and wasting money on the purchase of this higher power solar panel.

Installing different-sized solar panels in series is not recommended because the smaller-sized panel will determine the overall voltage output of the larger panel.

In connecting solar panels in parallel, all of the solar panels must have the same nominal voltage value. However, it is optional that they all have the same ampere rating.


The more solar panels you have connected to form bigger arrays, the cheaper it is to buy electricity. TThat’sall there is to it. Depending on how much voltage or current you want to work with, there are many different types of arrays that you can use.

Parallel wiring is the best option when designing a 12-volt battery charging system. For most residential solar installations, the most efficient installation is a series-parallel setup and will generally require more wiring than a series setup.

But for a simple reference in how to connect solar panels, remember that parallel wiring = more amperes and series wiring = more voltage. And with the right type and combination of solar panels, you can power just about any electrical device you may have in your home.

Our Services

Our Latest Posts

Contact Us


(805) 691-8000