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How to connect solar panels in parallel or in series for you van or home?


We have decided to purchase our solar panels and we are considering whether to install a photovoltaic system on our own or with the help of a professional. It is then when some doubts arise such as; How are they connected to each other? Is it better to connect solar panels in series or in parallel?


The need to connect our solar panels in series arises because we want to obtain higher voltages than those currently offered by the panels. So, for example, to obtain 48v we will need to connect several panels in series because there are no solar panels that offer that voltage. Or because the working point of the inverter requires a minimum voltage or working voltage.


Depending on our objective, the solar panels can be connected in series if we want to increase the voltage of the system, or in parallel once the working voltage is reached if we want to increase the amperage to have more power.


The way the connection is made can affect the design of the photovoltaic installation. We explain in detail in this post the best way to connect your solar panels and get the right performance.


In the following image we can see an example of parallel connection for one of our solar kits:


Connecting panels in series and in parallel (mixed)

This type of combined connection is used to increase both the current and voltage of the system. The most important thing is not to exceed the maximum voltage allowed by the charge control or the maximum power.


It is normally used in installations where 4 or more solar panels of 60 or 72 cells are connected. In this case we seek to multiply the voltage and the total amperage of the installation. For this type of installation MPPT inverter chargers are used.


Important: All parallel series must be equal in number of panels.


So ... is it better to connect solar panels in series or in parallel?

Depending on the size of the photovoltaic installation, the working voltage of the batteries (in case of isolated self-consumption), the output voltage to the inverter (in case of large installations), and the specifications of the solar panels themselves, one or the other, or a combination of both, will be used.


It is very important to make the right decision in order to obtain the right performance for your type of installation and to obtain the desired voltage.


However, as long as the system allows it, working in series always reduces losses. If it is technically feasible to connect for example two modules in series or two in parallel, always choose two in series.


Do not forget to consult with our team of professionals. We will help you make the decision that best suits your photovoltaic installation.


Related Articles: Before You Go Solar Panel System of 2022 - Use This Renogy Solar Calculator Power Tool.

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