If you are planning to go solar and take advantage of the economic and environmental benefits of solar power systems, you will have to choose a solar power system size that will suit your residence and will meet all your energy requirements.
Choosing the right size of solar panels is essential as size plays a major role in the amount of electricity your panels generate. If you choose a wrong sized panel, then the electricity generation will not meet your energy requirements.
In this article, we will talk about the factors that need to be considered while choosing the size of the solar panels.
- Size of the roof:
In order to utilise the sun’s power, you will have to capture the sunlight, and the roof of your house is the best location to capture the sunlight. How many panels can you install and how much electricity the panels can generate will depend on the size of your roof.
Keep in mind that all areas of your home will not be suitable for solar panels. For example, any part of the roof that is facing the south will not produce enough efficient solar power as that part of the roof will not receive enough sunlight. However, the majority of the households in Australia have sufficient roof space.
Solar installers use satellite solar mapping systems to help homeowners find the right sized panels and ensure that they will fit on the roof space. The installers directly map the panels on the roof and prepare a report that contains the annual electricity production of the solar power system and estimates the amount of money you will save each year by using solar power.
- The amount of electricity bill:
If you want an idea of how much electricity you consume in a day, take a look at your electricity bill. The majority of electricity companies will present you a bill that contains a graph on the back of the bill which indicates your average daily consumption of electricity.
An average three bedroom house in Australia with a standard sized family and a fair usage of air conditioning will typically have an average daily consumption of 15 kWh to 25 kWh.
A solar power system of 1 kWh will generate about 4 kWh to 5 kWh of electricity in a day, depending on where you live in Australia and how many hours of sunlight you receive on a normal day.
- The amount of your electricity consumption during the daytime:
A solar power system will only meet the energy requirements of your home during the daytime if it is not connected to battery storage. It is better to use your solar energy directly in your home if you are not granted access to a benevolent feed in tariff.
The electricity that is generated from your solar panels will flow to the appliances in your residence and will save you money by reducing the amount of electricity that is supplied to your home from the main grid. If there is any extra electricity produced by your solar panels, then it will move to the grid and will net you about 6-10 c/kWh. This means that you will need a solar panel that can produce enough electricity to meet your daytime electricity consumption.
To estimate your energy consumption during the daytime, take a look at your electricity bill and check the average amount of electricity your home consumes when daylight. Contact a reputable solar installer to get an accurate amount of your energy consumption.
- Choose a solar panel that can generate enough electricity to meet your energy consumption:
If your home has average daily electricity consumption of 25 kWh, then a solar power system of 5 kWh would most probably be enough to meet the daytime consumption of your home.
If you choose a 10 kWh solar power system, then it probably would be larger than you need, and a lot of energy will be supplied to the main grid if you do not have battery storage with the system.
If you install a solar panel without battery storage, then you will have to remain connected to the main grid as your solar power system will not be able to generate and supply electricity after sunset.
The amount of energy produced by solar panels is usually affected by the weather conditions, such as rain, cloudy days, and snow. In these cases, you will have to import electricity from the main grid.
Take the condition of your roof into account before installing a solar power system as a typical solar power system lasts from about 25 to 30 years; therefore, make sure that the condition of your roof is good enough before installing the panels.
Choose the right solar installer to install your panels. Look for reputable solar installers near you, ask for recommendations from friends, family, and neighbours, and check the ratings and reviews online before finalising the solar installer that suits you best.
Before choosing the right solar panel for your residence, research about the brand, quality, performance, product, and a performance warranty of the solar panel. Receive at least three solar quotes from three installers and compare the quotes to find the one that suits your home and your budget best.
Going solar is an important contribution to the wellbeing of the world. It is a necessary step towards a greener future for the planet and the next generation. Consult our Solar Power Buyer’s Guide before you plan to convert into solar power!