6.6 kW solar systems:
6.6 kW Solar Systems are the top selling size in the complete solar panel industry. If you are surfing the internet researching solar energy we bet you have seen an ad to get a 6.6 kW solar system Brisbane. If you are confused about what a 6.6 kW solar system is, why it is so popular among households and why everyone is recommending this system then stick around as we explain all of this and more today in our ultimate guide to 6.6 kW solar system in Brisbane. We will tell you the reason why this size is considered as adequate for most Australian households and if it is for you or not.
The Basics of a solar system
Before telling you about the 6.6 kW solar system, let’s understand what the major parts of a solar system are so that you can understand about the 6.6 kW solar system better. This information will also help you in making a better purchase for your solar system and you will also understand it better.
A typical solar system is made up of 4 components: the solar panels, the solar inverters, the racking for the solar panels and the consumption monitor.
We will explain each of these in brief below. Let’s start with the most basic equipment that is the solar panels.
These are the most basic part of a solar system and they are what does the main job of converting the solar energy to electrical energy. All the other parts are made to support and facilitate the process of solar panels, so that they can work smoothly. The solar panels soak in sunlight from the sky and convert it to usable electrical energy, this energy can be used at any place they are required. The solar panel is a rather simple yet complex piece of engineering which has allowed many households to live a life free from energy bills, while saving the environment by using renewable energy sources to generate electricity.
A typical solar panel consists of solar cells, which are miniature silicon chips which help in converting the solar energy into electricity. These solar cells are arranged in a definitive pattern to make functional solar panels which can be used on the roof of your house. The solar cells are of two types namely polycrystalline and monocrystalline. Both are very similar in working but differ in the physical appearance. While the monocrystalline panels are sold in the industrial black color, the polycrystalline ones are blue in color. You can pick either of them as per your taste, but let’s clear that they have little to no effect on efficiency as both operate in a similar pattern.
The solar inverter is the second most important piece of equipment in a solar system after the solar panels. This is because your solar panels generate electricity in the form of Direct Current or DC and all your appliances require Alternating current or AC to function. This is where the solar inverter comes into play, because it’s only work is to convert the energy generated by the solar panels i.e. DC into energy which is accepted by your home i.e. AC.
The inverters mainly come in two types which are the string inverters and the micro inverters. We have explained each of them in detail below:
The string inverter is the big piece of equipment which is the only one required in order to convert your DC energy to AC. The string inverter is called so because it gets connected by all the solar panels with the help of wires or “strings”. The string inverter is the size of a paper book and it should be kept away from the contact of direct sunlight to protect it from burning and overheating issues, hence increasing its longevity.
The micro inverters are much smaller as compared to string inverters, that’s why they are named so. Where the string inverter is the only component required to solve your inverter needs, the micro inverters are required as per your number of panels. If you have got 10 solar panels on your roof then you require 10 micro inverters to make the system work. The micro inverters stick to the back of the solar panel hence they are always in shade that’s why they last relatively longer than the string inverters. The micro inverters, because they are individually connected to each solar panel, provides you with complete control on your system. You can minutely control each panel and its efficiency in order to get the maximum output out of your system.
Another advantage of a micro inverter over the string inverter is that if any problem comes in the string inverter, the whole system will come to a stop, hence will not generate any energy in this time, whereas micro inverters doesn’t cause the system to fail if one of them stops working because there are many present in the system which keeps the system up and running in spite of a failure.
Solar Panels Racking
The next component which comes into play after getting the solar panels and the solar systems in place is none other than the solar panels racking. As the name suggests they help to mount the solar panels in place on your roof. These are made up of aluminum and are the only parts which ever come into contact with your roof. You must get them of good quality as the main component of your solar system i.e. the solar panels are counting upon them to survive on your roof. The racking will hold the solar panels in place for as long as 30 years so you better not save money in this part.
If you don’t use a consumption monitor in your build, it will still work without any problem, but the catch is that you will not be able to tell what your solar panel is generating in kW and if it is holding up to your expectations or not.
We have added this in our list of fundamentals because we want you to understand the importance of this small tool which will help you big time in maintaining your expensive solar system.
The main reason why you should get a consumption monitor is because it will help you keep track of the energy generated by the solar panel with the amount of energy consumed by you, and the energy sent by you to the grid. This information is critical to you because this is the one which will tell you if your solar investment is paying off or not.
Another reason why getting a consumption monitor is recommended is because by using this you can know when your solar panels require any maintenance. You can figure this out by seeing a decline in the energy generation by the panels, which can only be observed with the help of this.
Now when you know about what components go into making a solar system work, now let’s discuss today’s topic i.e. 6.6 kW solar systems.
In this part of the guide, we will discuss everything you need to know about the much hyped 6.6 kW solar systems.
The topics that we will discuss today are:
· Type of panels required
· Space Required
· Size of Solar Inverter Required
· Output of a 6.6 kW solar system
· Capital (Cost) involved in a 6.6 kW solar system installation
· Period of complete payback
Let’s talk about each one of them in detail.
Type of Panels Required for a 6.6 kW solar System
The answer to this question completely depends on the size of modules you chose to install in your solar panel. Whether they are of high efficiency or they produce low output. If you can use the modules which generate 370 watts of power per module installed, then your system will be marked as complete in only 18 modules, the number of modules required will grow higher or lower depending upon the efficiency of the module.
Required Space for the installation
This will again depend on what you chose to install on your rooftop, 60 cells, 72 cells or some other configuration. To give you a rough idea we will consider a standard panel which is the most common in residential solar installations of this kind. The dimensions of this type of panel is 1.8 x 1 meter and they will take 32 sq. meters from your roof’s free space.
Size of Solar Inverter Required
As explained above the solar inverter is an essential in every solar installation and the 6.6 kW system is no exception. But the confusion starts when we tell you that the adequate size for a 6.6 kW solar installation is 5 kW. You can argue how, and we are here to answer the same.
Our recommendation of 5 kW solar inverter is backed by two solid reasons which we will explain now
The first reason to why a 5 kW solar inverter is adequate for a 6.6 kW solar installation is because the solar panels you are purchasing doesn’t seem to work on the energy rates they are rated because they lose 10% of their capacity at a mere 25 degree Celsius temperature, and tend to lose more as the heat rise, and we very well know how harsh Australian summer can become. That’s why getting a solar inverter less than required size is beneficial.
The second reason why using a 5 kW solar inverter is recommended is because in most Australian regions the maximum limit of solar inverter which can be connected to the grid to export energy is only 5 kW. That is also a big reason why a 6.6 kW solar system is much popular in Australia.
Output of a 6.6 kW solar system
The output or electricity generation from a 6.6 kW solar system is directly dependent on the shade your house receives and the angle of your solar panels. Quality of the solar system including the panels and inverter plays a major role in increasing the output of a 6.6 kW solar system.
Giving a tentative idea, let’s take a situation of a 6.6 kW solar system which is of good quality and installed at a good solar angle and it also receives sunlight for the most part of the day. It will generate 24 to 25 kWh of energy in one day. An average Australian family requires 15 to 20 kWh of energy every day, hence you can satisfy your energy needs easily with this kind of system.
The energy you consume is very much more valuable than if you sell the same to the grid, because the feed in tariffs of every grid is less than what they sell the same amount of energy. If you work on self-consumption more than you can make your solar system work most efficiently for you.
Capital (Cost) involved in a 6.6 kW solar system installation
Cost required in getting a solar system of 6.6 kW in size is somewhat around 5400 dollars to 9100 dollars. The price we mentioned is subject to change based on when you read the article and where you reside in the country. These prices are taken from Brisbane. The solar installer you chose to get your solar system installed also plays a major role in making your solar system cheaper.
Period of complete payback
The period of complete payback is the time taken in covering the costs of your solar investment through savings on the energy bills and the feed in tariffs. The normal 6.6 kW solar system will pay itself back completely in less than 5 years, post which your system will generate complete profit. This means that you will be getting your solar system for free if you wait for five years and focus more on self-consumption of energy rather than looking for feed in tariffs.