All parts of a photovoltaic system are important for the proper functioning of solar panels, including the materials used, but one of the parts that stands out the most is the solar inverter.
how to connect solar panel to inverter diagram
This is because it fulfills the essential function of converting direct current into alternating current, which is used to power devices within a home, office or business.
In this article we will explain how to install a solar inverter, how it works, what are the necessary tools and some extra tips to do the installation with higher quality.
1. How does the inverter work?
In addition to converting direct current into alternating current so that it can be consumed, inverters also perform other essential functions for the proper functioning and use of energy.
For example, this allows you to monitor the operation of the installation, the electrical activity and the signals when some type of problem arises. This helps that when a failure occurs, the appropriate repair can be made. The most specialized inverters report the problem to another device that is not necessarily where the installation is made.
It also helps to enhance the operation of the photovoltaic system, favoring the use of solar energy in each of the solar modules.
2. Types of solar inverter
Before you learn how to install a solar inverter, you should keep in mind that there are different alternatives when choosing a photovoltaic inverter, but this will depend on the type of installation you are going to carry out.
Inverters interconnected to the grid
This type of inverter adapts the wave of the panels to the characteristics of the wave of the network. And from this you can use:
– String inverters: This is mostly used in a photovoltaic system that deals with shadows and what characterizes it is that each of the modules is individually connected in a chain, but despite being an economical option, it must be taken into account that if one of the solar panels lowers its energy production, automatically all the other modules will reduce their production and will equal the one that produces the least.
– Microinverters: Unlike strings, this is characterized by the fact that each solar panel has its own microinverter, so if one will lower its performance, it does not affect the others, you can also check the status of each one and detect faults more easily.
– With power optimizers: The latter has a centralized inverter just like the strings. But, the difference is that it allows the supervision of each one of the boards individually, that is, if one of the modules will lower its production due to shadow, the others will continue to function normally and will not equal the fault.
Isolated installation inverters
When you carry out an autonomous photovoltaic installation, you must use an inverter that is compatible with an isolated and battery system, since this must protect the greatest amount of energy so that it can be used when the solar module is not working.
– Hybrid inverter : In addition to transforming DC to AC, this has the function of managing the electrical load to the system batteries, so that they work when the panels are not producing energy and inject the surpluses into the electrical network. They can also function as a backup system, that is, in the event of no electricity supply, this inverter is capable of taking the stored energy from the batteries and injecting it into the installation.
-Isolated inverter: This inverter works only with batteries and cannot be interconnected to the network. These systems are ideal for remote locations where electricity is not available. The inverter is responsible for converting all the energy stored by the batteries into alternating current so that the different electrical or electronic devices can work.
3. How to install a solar inverter?
The time has come for us to explain how to install a solar inverter, keep in mind that this is a complement and it would be best to take training.
Step 1. Check the circuits
You must make sure that all the distribution circuits of the house work correctly, for this you can be guided by their colors, for example:
- Yellow and green color: Earth connections
- Blue color: neutral circuit
- Black or brown color: Phase circuits
Remember that you must still separate the circuits belonging to the home, such as plugs, lighting, appliances, etc.
Step 2. Place the inverter
In this phase, you simply have to install the inverter on the wall that it is intended for, make sure that it is a space free of moisture and that it is not close to appliances that can increase its temperature.
We recommend that you install the inverter higher than the batteries, but not above them.
Step 3. Install the protections
You must also install a switch or fuse, in the positive line that links the positive pole of the batteries with the inverter, this helps is a protection for the batteries.
Step 4. Place the batteries (in case of being hybrid or isolated)
Now, the batteries are placed in a cool place, that does not get moisture and that in the same way avoids overheating. In this step, remember that the batteries must be installed on flat surfaces and that you must not be under the inverter.
Step 5. Make the connections
The time has come to make the connections from the battery to the inverter; Once this is done, connect the inverter lines to the installed connections of your client’s house or building.
Before where the inverter is located, install switches or fuses for the negative and positive poles so that you can make the connections of the lines of the solar modules.
Finally, connect the PV+ and PV- input to the line of the solar panels.
Step 6. Make sure it works
Put the fuse that corresponds to the batteries to check if the voltage is necessary to work, this fuse can be 12, 24 or 48 volts. Then test the batteries by connecting the fuses on the solar panels and check that they are charging.
Remember to reset the power line to the house and check that everything works effectively again.
As you may have noticed, the investor is an essential part for them, it is always necessary to be informed and trained. We invite you to visit our blog where you can find more useful information and if you have any questions do not hesitate to contact us .