FAQ

1. How big is a 10 kW solar system?

A 10kW solar system will require a roof area of between 30-40 m2 and will generate approximately 40-60 kWh per day. This is dependant on where in Australia you live and the quality of solar panels installed.

2. How much is a 5 kW solar system?

At the time of writing, it is estimated that a 5 kW system consisting of a 5 kW solar PV system and appropriately sized inverter will cost between $7,500 and $9,500 installed before any government rebates or incentives. A 5 kW system is estimated to generate between 20-30 kWh per day which is sufficient to meet the day time any requirements for an average Australian family of 4 people.

3. How many solar panels are needed for a 5 kW system?

A 5 kW solar system will require between 20-25 solar panels depending on the rating of the panels. The higher the rating, the less panels that are required. A system of this size would require an area of 15-22 m2.

4. How much will I save with a 5 kW solar system?

The average Australian home consisting of two adults and two children will save between $125 and $175 per month by installing a 5 kW solar system with NO battery storage. The amount saved will vary depending on how the person(s) utilises this system. The more the system can be utilised during the day for the electricity being generated, the more the user will save in contrast to selling it back to the grid at approximately 8-10 cents per kWh, and then buying energy back later in the day when the system is not generating energy at around 25-35 cents per kWh. Note a kWh is the same as what most energy providers will refer to as a “Unit” on your electricity bill.

5. What are the best solar panels in Australia?

There are a lot of different opinions on what is considered the best solar panel. Some say LG, others Trinar, however the most important thing to take into consideration when selecting a solar panel is the manufacturers warranty on the panels and the performance warranty provided. The performance warranty provides assurance to how much energy the solar panels will generate as they age over their life. For a good solar panel this will be 10-12 years for the manufacturer warranty and 10-15 years for the performance warranty. On completion of our obligation free “get a quote” tool, you will be provided with the warranty for the solar panels our recommended installers use.

6. What are the best solar panels to buy?

There are a lot of different opinions on what is considered the best solar panel, some say LG, others Trinar however the most important thing to take into consideration when selecting a solar panel is right for you is the manufacturers warranty on the panels and the performance warranty provided. The performance warranty provides assurance to how much energy the solar panels will generate as they age over their life. The performance warranty provides assurance to how much energy the solar panels will generate as they age over their life. For a good solar panel this will be 10-12 years for the manufacturer warranty and 10-15 years for the performance warranty. On completion of our obligation free “get a quote” tool, you will be provided with the warranty provided for the solar panels our recommended installers will provide you with.

7. How do I calculate my solar power needs?

To calculate your solar power needs, you firstly need to understand how much energy you use during both the day and night time and what it is you are trying to achieve i.e. working to a budget, wanting to cut your energy bill by a certain amount, wanting to live off the grid etc. Once these variables are known, you can then match the size of your solar system required to meet your energy demands. It is important to keep in mind that energy used during the day is different to energy used at night, as solar panels don’t generate electricity at night. At night time you can either buy energy from the grid or utilise energy storage i.e. a battery that may have stored energy during the day that was not used. Our solar quote tool has been purpose built to answer this question for you in less than 60 seconds, and we highly recommend you get an obligation free quote. This will determine what an appropriately solar system size is for you, how much it will cost, how much electricity it will generate and subsequently save off your bill.

8. How much do solar panels cost in Australia?

At the time of writing, the solar panels cost is between $180-$300 for a 250 W panel depending on their efficiency. However, as this price continues to fall, most companies will offer a discount on the per panel cost – the larger the system is. For example, a 1 kW system may cost $1500 with an inverter, but a 3 kW system may cost $3000 even though it is more than double the size.

9. How much does it cost to install solar panels?

The cost to install solar panels is usually included in the price of purchasing a solar panel system. This should be between 15-25% of the total cost of the system, including all required connection costs. Therefore for a 5 kW system, you would expect to pay between $1,200-$2,000 for installation & connection related costs.

10. Average cost to install solar panels?

This varies based on the size of the solar panel system being installed, but you should expect to pay between 15- 25% the total system cost. For a 3 kW system this would amount to between $800-$1200.

11. How much does it cost for solar panels?

Solar panels range from $250-$300 for a 250 W panel. This price varies based on the brand and quality of the panels.

12. How much does it cost to get solar panels?

The most commonly installed solar panel system in Australia is a 5 kW solar panel system with an appropriately sized inverter. This will cost between $7,500 and $9,000 full installed and ready to use. A system of this size is expected to have a 5 year payback period for an average Australian families energy demands. An average Australian family consist of two adults and two children.

13. How big is a solar panel?

The average 250 W solar panel is approximately 1.2m high X 0.8m wide X 0.2m deep. This will vary based on the manufacturer.

14. Do solar panels work at night?

Unfortunately solar panels are not yet at a stage where they can generate electricity at night. Solar panels rely on solar energy photons which are only available when the sun is shinning over them during day light hours. These solar energy photons can also be impacted by colour coverage / poor conditions which can “shade” the panels.

15. How effective is a solar panel?

At present, the average solar panel will convert 18% of the lights energy received, known as solar irradiance (measured in kWh) to electrical energy (also measured in kWh) for use in your home. There are solar panels that have higher conversion efficiencies however these become more expensive as they utilise more expensive materials. The most efficient solar panels are found on space craft i.e. the International Space Station which have solar panels that are capable of converting >35% of the lights energy received to electricity. Unfortunately, in these circumstance there isn’t the luxury of connecting to the grid for energy in which case the extra money spent outweighs the cost of running an extension cord into space – if that were possible…

16. How long do solar panels last in Australia?

Solar panels will generally come with a manufacturers warranty of 10-12 years depending on brand. This however does not mean that the panels stop working and there are reports of some solar panels still generating electricity 25 years after they were first purchased. Overtime, the efficiency of electricity conversion that the panels are able to achieve will reduce as materials in the panels degrade or the surface of the panels becomes covered in matter that blocks sunlight to the active part of the panel. Australia is considered a harsh operating environment for solar panels, however the majority of panels sold here have been designed with this taken into account.

17. How much solar do I need?

The amount of solar you require depends on your homes energy usage and when you use it. If you are home all day and subsequently use most of your energy during daylight hours, then a solar system sized to match your day time energy usage will be sufficient. However, if you are at work all day and use the majority of your energy in the early hours of the morning and later at night when there is no sunlight, you would require a smaller solar system paired to an appropriately sized battery to store the energy for usage at night time. It is very important that when you do decided to install solar, you discuss this with the solar provider who will be able to recommend a system to match your energy usage profile. The LetsGoGreen “Get A Quote” tool will help you quickly determine what your energy usage profile is for each season of the year. We believe this is the perfect tool to help you start this conversation equipped with all the right information.

18. How many solar panels do I need in Australia?

The amount of solar panels you need in Australia depends on how much energy you use and when you use it. As a rough rule of thumb, the further north you are in Australia, the more solar energy there is available and as result the fewer number of solar panels you require. Our solar quote tool has been purpose built to determine exactly how many solar panels you will need based on your energy usage and where you live in Australia.

19. How many kilowatts does the average home use?

The average Australian home consisting of two adults and two children will use between 20-30 kWh (known as units on most electricity bills) per day. The amount of energy the average home uses varies throughout the year. This is proportional to the ambient temperature during that time of year, and the hours of light. Peak Summer, and peak Winter are times of high energy demand for most households due to cooling and heating requirements respectively.

20. How many solar panels are needed to produce 1 kW?

This depends on the rating of the solar panels installed, but typically 4-5 solar panels will generate 1 kW.

21. How many solar panels are needed to run a house?

The number of solar panels required to run a house depends on the energy demands of that household. For the average Australian home consisting of two adults and two children, a 5 kW solar system would be required. A 5 kW system would generally consist of anywhere between 20-25 solar panels which would require a total area of 22.5 – 27.5 m2 depending on the rating of the panels installed.

22. How many solar panels do I need in Perth?

The number of solar panels a Perth home would require varies based on the home’s energy usage requirements. For the average Australian household consisting of two adults and two children, anywhere between 20-25 X 250 W solar panels would generally meet all of that households day time energy requirements.

23. How many watts does it take to run a house?

Electricity usage is generally measured in kW, sometimes referred to as “units” on electricity bills. One kW = 1000 W which means that 1 kW hour = 1000 W used per hour. The average Australian household will use between 20-30 kWh per day. It is important to understand that this is split between day and night time usage which varies from household to household. Solar panels do not generate electricity at night time, therefore it is important to ensure that when you do decide to install solar, you consider how much energy you use during the day, and how much you use during the night time as it may be more beneficial to install a solar system paired with a home battery to meet your household energy requirements. Our “get a quote” tool takes less than 60 seconds to complete and will instantly tell you what size system you need to install, how much this will cost and what benefits your household will gain from installing it.

24. How many kWh does a 4 kW solar system produce in a year?

A 4 kW solar system installed in Perth will produce between 10 – 20 kWh per day or 3650 – 7300 kWh per year. This variation exists due to the change in seasons and light available during these times.

25. How many solar panels do i need for 100 kW?

A 100 kW solar system would require between 330-400 solar panels depending on the rating of the solar panels. This would require an area of between 400-500 m2 for installation.

26. How many solar panels do I need for 2 kWh?

A 2 kW solar system would require between 8-10 solar panels. This would require an area of between 10-12 m2 for installation.

27. How many solar panels do I need for a 10 kW system?

A 10 kW solar system would require between 40-50 solar panels. This would require an area of between 50-60 m2 for installation.

28. How many solar panels do I need for a 6 kW system?

A 6 kW solar system would require between 24-30 solar panels. This would require an area of between 30-40 m2 for installation.

29. How much money do you save with solar panels in Australia?

The average Australian home consisting of two adults and two children will save between $125 and $175 per month by installing a 5 kW solar system with no battery storage. The amount saved will vary depending on how the person(s) uses this system.