Installing a 15kW solar system in your home can be a magnificent way to reduce your monthly cost of electricity bills. There are several things you need to keep in mind when investing in solar energy to maximize your long-term savings. Different offers for 15 kW solar system Compare prices with other solar installers in your area. So that you can get a good idea about the solar panels, solar inverters, batteries and their prices of your choice. The “Solar world power” gives you a guide on 15 kW solar panel systems, learn more about the cost of a 15 kW solar system in your location, the quantity of electricity you can expect your system to produce, and the smartest method to calculate your payback period.
The output of any solar system depends on the amount of sunlight the panels receive. And one of the conditions for receiving sunlight is the degree to which the panels are mounted. We arranged the table below using sunlight data from the weather bureau and assuming the solar panels were mounted at a 30-degree angle to the north.
City | Daily Production | Yearly Production |
Sydney | 54kWh | 19,710 kWh |
Melbourne | 52kWh | 18,341 kWh |
Brisbane | 61kWh | 21,900 kWh |
Adelaide | 59kWh | 21,079 kWh |
Hobart | 50kWh | 16,973 kWh |
Perth | 64kWh | 22,995 kWh |
Darwin | 66 kWh | 24,090 kWh |
Canberra | 58 kWh | 21,079 kWh |
Depending on the panel’s wattage, a modern 15kW solar system will have between 37 and 45 panels and require 75 to 90 m2 of roof area (which are typically between 330-400W each). Solar panels for homes typically measure 1.7 meters by 1 meters. This means that unless it is ground-mounted, a 15kW solar system won’t be a possibility for the majority of households.
Roof area and number of panels for 15kW solar panel systems:
Solar panel watt capacity | 450W | 550W |
Number of panels, approx | 34 | 28 |
Required roof area, approx | 74m2 | 71.40m2 |
A 15 kW solar system generates 54–60 kWh daily, making it ideal for large homes, commercial sites, or properties with EV chargers and heavy daytime energy use.
Net System Cost: $10,000 AUD (after federal STC rebate)
Payback Period: 2.2 – 3.2 years (High self-consumption) | 3.8 – 5.0 years (Low self-consumption)
Project IRR: 26% – 45% p.a.
Key to Maximum ROI: Self-consume as much solar as possible during the day. Grid feed-in tariffs (~4¢–8¢/kWh) are much lower than retail electricity (~28¢–36¢/kWh), so running appliances, heat pumps, or electric vehicles during peak generation hours fast-tracks your payback.
As you begin your search for a solar energy system for your home, these figures can help you have a better idea of what to expect. However, the cost of your solar energy system is influenced by a variety of factors. Your system will cost extra if you want to install high-efficiency equipment or if you require special accommodations for a difficult roof. Simply ask for an explanation if you receive a price from a solar farm that is much more or lower than the range for a 15 kW solar system in your state. A reputable solar installer will gladly go over their plan with you in detail. The average cost of solar in the Australia is $7,000 for a 15 kilowatt system (without battery) as of January 2022. After the federal Gov. rebate.
The new invention of AC Coupling, Battery Storage Systems can now be fitted in all currently operating PV Systems. As it connects directly to the main power supply, you can hook a battery up to any property. You could enjoy the power of the Sun day and night if you chose to add our Tesla Powerwall 2 Battery Storage Option to the 15kW Solar system bundle. However, keep in mind that battery backup choices tend to be quite pricey and can greatly lengthen your back period. As a result, before you take the plunge, talk to us; we’ll be pleased to let you know if this is the best course of action for you.
In Summary, a 15kW solar system is a powerful and efficient way to harness the power of the sun to meet your energy needs. It’s important to choose a renowned and dependable provider if you’re thinking about installing a 15kW solar system. Solar World Power is a leading provider of solar systems in Sydney, Australia, with a track record of delivering high-quality products and exceptional customer service. Customers who have taken solar systems from Solar World Power have provided positive feedback about our experience, citing the company’s professionalism, expertise, and commitment to customer satisfaction. We also offers competitive pricing and financing options to make solar power accessible to everyone.
We are dedicated, passionate, and committed to renewable energy, and eager to contribute our share to better the environment.
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