15kW Residential Solar System
What is a 15kW Solar System?
How Many Solar Panels Does a 15kW Solar System Have?
The number of solar panels in a 15kW system depends on the wattage of each panel. Most panels today have wattages between 440W to 500W. Here’s a breakdown:
| Panel Wattage | Number of Panels |
|---|---|
| 440W | 34 |
| 475W | 32 |
| 500W | 30 |
Thus, a 15kW system typically requires between 30 to 34 solar panels, depending on the panel’s efficiency.
How Much Electricity Does a 15kW Solar System Produce?
A 15kW solar system can produce between 55 kWh to 65 kWh of electricity per day, depending on factors such as location, weather conditions, and the orientation of the panels.
| Location | Estimated Daily Output |
|---|---|
| Sydney | 55 – 60 kWh/day |
| Melbourne | 50 – 55 kWh/day |
| Brisbane | 60 – 65 kWh/day |
| Adelaide | 58 – 62 kWh/day |
This amount of energy is typically enough to power a large household or a small business
What Are the NSW Rebates for the 15kW Solar System?
In New South Wales, homeowners and businesses may benefit from several rebate programs:
Small-scale Renewable Energy Scheme (SRES): This federal scheme provides rebates in the form of Small-scale Technology Certificates (STCs). For a 15kW system, you could receive a rebate of approximately AUD 4,000 to AUD 5,000, depending on your location
Solar for Low-Income Households: Some NSW households may be eligible for additional rebates, especially for energy-efficient upgrades
How Long Will it Take for the System to Pay for Itself?
The payback period for a 15kW system depends on factors such as the local electricity rates, solar output, and available government rebates. On average, a 15kW system can take around 4 to 7 years to pay for itself.
With typical savings on electricity bills ranging from AUD 3,000 to AUD 5,000 per year, the investment can be recouped faster if energy prices rise or if you qualify for additional rebates
What is the Cost of a 15kW Solar System?
The cost of a 15kW solar system in Australia ranges from AUD 13,000 to AUD 18,000, depending on the quality of the solar panels, the brand of the inverter, and the complexity of the installation. Higher-end systems with premium components will cost more, while budget-friendly options will be less expensive.
| System Quality | Cost (AUD) |
|---|---|
| Budget | 13,000 – 15,000 |
| Mid-range | 15,000 – 17,000 |
| Premium | 17,000 – 18,000+ |
This cost typically includes installation and the federal Small-scale Renewable Energy Scheme (SRES) rebate
Inverter and System Performance
For a 15kW solar system, the inverter is a crucial component. A 15kW system typically requires an inverter that can handle 12kW to 15kW. Many homes opt for three-phase inverters to better distribute the electrical load, especially for larger systems.
In terms of performance, the inverter converts the direct current (DC) produced by the panels into alternating current (AC) used by household appliances. The system’s efficiency largely depends on the inverter’s quality and how well it is matched to the panels
Considerations for Battery Storage
Adding a battery to a 15kW solar system can significantly enhance energy independence by allowing you to store excess energy for use during the night or in case of outages. A 13.5 kWh battery is commonly recommended for such large systems. A battery helps maximize savings and reduces reliance on the grid.
What Are the Cost Implications of Adding a Battery?
The cost of adding a battery to a 15kW solar system typically ranges from AUD 10,000 to AUD 15,000, depending on the battery’s storage capacity and brand. The payback period for a solar system with battery storage is generally longer, extending to 7-10 years due to the additional upfront costs
What Warranties Are Included with a 6.6kW System?
Most 6.6kW solar systems come with robust warranties, including:
Panel Warranty
Typically 10-25 years for performance guarantees.
Inverter Warranty
Generally 5-10 years.
Workmanship Warranty
Installers often provide a 5-10 year warranty on installation work
Ready to Install a 15kW Solar System?
Start reducing your energy costs today with a customized 15kW solar solution. Get a free, no-obligation quote from certified installers in NSW.