The size of the solar system we recommend for you, will depend on how much energy is necessary to meet your electrical usage. We always advise you to review your most recent energy bills first.
Assuming –
1. An energy efficient Australian three bedroom home,
2. An average sized family and reasonable use of air conditioning,
We expect an average daily consumption of around 15 kilowatt-hours (kWh) to 25kWh.
The majority of electrical consumption occurs during daylight. This influences the solar installation we recommend. For instance, assume that you consume 30kWh per day, but only a third during daylight. We recommend a system that generates about 10kWh per day. This article will give you an idea on how much money you will save on a solar system.
3kW Solar Power System
We expect a 3kW solar system will produce around 12 kWh per day. More electricity is generated during summer and less during winter. This is due to the difference in daylight hours. In most cases, a 3kW system typically has a 12-panel PV array. As a guide, it can save you up to around $300 a quarterly power bill if all of the solar power is consumed in the home.
5kW Solar Power System
If you consume an average of 25kWh of electricity daily, a 5kW solar system is the ideal solar system size. It would generate enough solar energy to offset a large proportion of your daytime usage. At the same time, most of the electricity is exported to the grid. A 5kW solar system usually has an 18-panel array. It produces around 20kWh a day. At this size, it can save you up to $500 on your bill every quarter.
7kW Solar Power System
A 7kW solar system can typically produce around 28 kWh a day. More is generated on summer days (35-40kWh) and less during winter. This solar system is best for medium to large homes, that uses around 30kWh daily during daytime. A 7kWh solar system can save you around $600-$750 on your electricity bill depending on your usage.
As you can see, there are a number of different system sizes that supports different uses. The larger your system, the larger savings you can make. For most domestic uses, small to medium solar installations are sufficient. However, for more people, a larger system may be better. If you are looking for the right system size for your home, complete the form below.