How do solar panels work step-by-step?
At first, the science of solar energy is mystifying.
I mean, how does solar photovoltaic (PV) panels magically transform common sunlight into useable electricity?
Well, when you dig a little deeper and dissect the panel (quite literally), you’ll find that it all starts to make a bit more sense.
The aim of this article is to uncover just how solar panels work, and what the benefits of using solar energy can have on our planet.
Let’s dive in!
Brief history on solar panels
The solar panels humble beginnings can be traced back over 100 years.
Back in the old ages, solar energies primary job was to help assist with the production of steam (hello industrial revolution) which could then be used to power machinery.
It wasn’t until Edmond Becquerel made the discovery of the photovoltaic effect, that sunlight would start being converted into solar electricity.
It was Becquerel’s discovery that led Charles Fritts to invent the worlds first genuine solar cell in 1893.
In 1941 an American inventor known as Russel Ohl patented the first silicon solar cell. Ohl’s invention led to the very first solar panel being invented in 1954.
Solar panels unsurprisingly found their first job far away from earth, way up in space in satellites.
Perhaps you remember your very own first encounter with solar panels, it was likely to be the one embedded in your new calculator!
What is a solar panel?
A solar panel is usually comprised of 6 different elements:
- Silicon solar cells
- Metal frame (typically aluminum)
- Glass sheet for protection and casing
- Standard 12V Wire
- Bus wire
Silicon solar cells are the main component of a solar panel and are responsible for converting sunlight into solar electricity.
How do solar panels work?
As already discussed, the main and most important part of a solar panel is the silicon solar cells.
Silicon has the atomic number 14 on the periodic table. It is a nonmetal with conductive properties that allow the element to convert sunlight into electricity.
When light interacts with a silicon cell, it forces the electrons inside of it to move, this movement initiates a flow of electricity.
This process is known as the “photovoltaic effect”.
It goes without saying though that silicon cells on their own can’t really provide your campervan or home with electricity.
In order for the solar cell’s electrons to escape and supply useful power, it needs to be paired with special wiring and a metal casing.
It’s also worth mentioning that solar panels come in different cell structures which I’ll go into more detail later on in the article.
Step-by-step process on how solar panels work
Step 1. The suns rays make contact with the solar panel and an electric field is created.
Step 2. The solar electricity generated flows from the silicon cells to the edge of the panel, and into the conductive wire.
Step 3. The conductive wire delivers the electricity to an inverter, inside the inverter the electricity is converted from DC to AC which is used to power buildings, vans and motorboats.
Step 4. Once the electricity has been converted to AC, another wire transports the electricity to a breaker box which distributes the electricity throughout the building as required.
Different types of solar panels
There are 3 types of solar panels, polycrystalline, monocrystalline and amorphous silicon.
Below I will go into more detail on each one:
What are the benefits of using solar energy?
|Advantages of Solar Energy||Disadvantages of Solar Energy|
|Renewable Energy Source||Installation Cost|
|Lowers Electricity Bills||Weather Dependent|
|Many Applications||Energy Storage is Expensive|
|Affordable Maintenance Costs||Takes up a lot of space|
|Tech Development||Associated with Landfill Pollution|
Renewable energy source
Solar energy is a true, clean, renewable energy source, unlike many of the other sources of energy.
Solar can be harnessed from anywhere on earth and is available almost every day.
Solar energy will be available for as long as we have the sun. Which, according to scientists should be for at least another 7 to 8 billion years!
Lowers electricity bills
Solar panels will allow you to use less of the grids energy supply which in turn will reduce your monthly utility bills.
Just how much it is reduced all depends on the size of the solar kit set up you have installed at your home.
Solar energy can be used for electricity (photovoltaics), yes that we all know. However, it can be used for heat (solar thermal) too.
Solar thermal can be used to distil water in regions with limited clean water supplies.
In the future, solar will most likely be introduced in mass to building materials, think solar bricks 😉
Affordable maintenance costs
If you install solar panels from a reliable company such as Renogy, you’ll likely see them last between 20 to 25 years.
Maintenance includes a simple cleaning every week to make sure you are maximizing your panels solar absorption rate.
As there are no moving parts there is generally no wear and tear, the only thing that will need to be replaced is the inverter, but you can do this every 5 to 10 years or so.
This means after your initial investment into solar energy, you can expect very little ongoing costs to maintain the equipment.
In the future we will no doubt see advances in quantum physics and nanotechnology.
This would greatly enhance the effectiveness of solar panels and double, or perhaps even triple, the electrical input of the solar systems!
I hope this article sheds some more light to the question “how do solar panels work?”.
Make sure to let us know how your experience with solar energy has been so far in the comments section below.