How big a solar power system do I need to power my house? The appropriate sizing of a solar power system to supply a home’s electricity needs is one of the most common questions from people considering buying solar panels. Energy Matters offers a number of tools and ways to help you determine the best size system for your house and circumstances. One of these is our solar calculator.
If you’re interested in obtaining personalised insights, you can also get FREE solar quotes through Energy Matters, ensuring that you have all the information you need to make an informed decision about harnessing solar energy for your home.
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Solar panel system size at a glance
How big a solar power system you will need is largely determined by your usage. The following image displays grid-connected solar panel systems suitable for various household sizes.
Understanding your energy consumption
Understanding your current energy usage is the first step in sizing your solar system. Review your electricity bills for the past 12 months to accurately understand your average daily and monthly consumption. This data will help you estimate how much solar energy you need to generate.
- Look for the kilowatt-hours (kWh) used on your bill. Knowing this allows you to compare your usage with the potential output of various solar system sizes.
- Consider seasonal variations in your energy use. For instance, air conditioning in summer or heating in winter can significantly impact consumption.
Considering solar battery storage
If you want to maximise your energy independence and use more of the solar energy you generate, consider adding solar battery storage. Battery storage allows you to store excess solar energy during evenings or cloudy days.
- Solar battery storage systems can increase energy independence, allowing you to use solar energy even when the sun isn’t shining.
- Integrating battery storage with your solar system enhances self-consumption and reduces reliance on the grid.
Exploring residential solar options
Before making any decisions, explore Australia’s various residential solar options. This includes understanding different solar panel types, inverter technologies, and installation considerations. Researching and comparing options will help you make an informed choice.
Factors affecting solar system size
The size of the solar system you need will be determined by the following factors:
- Your current and future energy needs. You must consider future purchases or changes that may impact your usage, ie. purchasing an electric vehicle.
- The space is available on your roof. Limited or unviable roof space may significantly impact the size of the system that can be installed.
- Your budget. Budget constraints may play a role in the size of the system you choose to install.
- The orientation and tilt angle significantly impact the system’s performance. North-facing roofs in Australia typically receive the most sunlight, enhancing energy production.
How many solar panels do I need?
This is a common question; the answer depends on the abovementioned factors. A typical residential solar panel in Australia produces between 300 and 400 watts. To calculate the number of panels needed, divide your daily energy consumption (in kWh) by the panel’s wattage and the average daily sunlight hours.
- Using a solar panel calculator can be very helpful for getting a more precise figure. These calculators take into account various regional sun exposure levels.
- When considering how many solar panels I need, consider the roof space available and the panels’ efficiency.
Using a solar calculator in Australia
Online solar calculators can quickly estimate the system size you need. These tools typically ask for your location, average energy consumption, and roof details. While calculators offer a good starting point, consulting with a professional solar installer is essential for accurate sizing.
- A solar calculator can give a preliminary estimate, and a professional installer can provide a more detailed assessment.
- Understanding that these calculators are estimates is essential, and a site-specific analysis is always recommended.
Looking to find out what size solar system you need for your home?
Use Energy Matter’s Solar and Battery Calculator to estimate the system you will need and the price you can expect to pay.
Professional Installation and solar expert advice
Working with a reputable solar installer is crucial for a successful solar system installation. A professional installer can assess your needs, recommend the right system size, and ensure proper installation. They can also provide valuable advice on maximising your solar investment.
- A professional installation will ensure your system operates at peak efficiency.
- A professional can assist with the correct sizing and help with understanding any available government rebates.
Energy Matters is here to help
Finding out the right solar PV system size for your home is as easy as completing a simple form! Our FREE solar and battery quote service connects you with solar experts. These experts are local to you and will determine the best size system for your needs.
This service is completely obligation-free. You will receive up to 3 quotes for you to compare. Click the button below to begin your solar journey today!
