20kW Residential Solar System
What is a 20kW Solar System?
A 20kW solar system is designed for larger homes, businesses, and commercial properties with significant energy consumption. This system generates enough electricity to cover high-demand usage, making it ideal for customers who aim to reduce their electricity bills while contributing to environmental sustainability.
How Many Solar Panels Does a 20kW Solar System Have?
The number of solar panels in a 20kW system depends on the wattage of each panel. Panels typically range from 440W to 500W.
| Panel Capacity | Number of Panels |
|---|---|
| 440W | 45 panels |
| 475W | 42 panels |
| 500W | 39 panels |
Higher-efficiency panels reduce the overall number required, making this more suitable for those with limited roof space.
How Much Electricity Does a 20kW Solar System Produce?
A 20kW solar system generates between 70 to 90 kWh of electricity per day depending on location, orientation, and local weather conditions. In areas with abundant sunlight, like NSW, the annual production can reach 25,000 to 32,000 kWh
| Location | Average Daily Output (kWh) |
|---|---|
| Sydney | 80-90 |
| Brisbane | 85-95 |
| Melbourne | 70-80 |
What are the NSW Rebates for a 20kW Solar System?
NSW residents can benefit from the Small-scale Renewable Energy Scheme (SRES), which provides a rebate in the form of Small-scale Technology Certificates (STCs). The value of these STCs depends on the size of the system and the location. For a 20kW system, this rebate can save homeowners up to AUD 5,000 to AUD 6,000 upfront
How Long Will it Take for the System to Pay for Itself?
The payback period for a 20kW system ranges between 3 to 7 years, depending on energy usage, feed-in tariffs, and the cost of electricity. Given the average savings of around AUD 5,000 to AUD 8,000 per year on electricity bills, customers can expect a substantial return on investment
What is the Cost of a 20kW Solar System?
The cost of a 20kW system in Australia typically ranges from AUD 15,000 to AUD 25,000. The price depends on the quality of the panels, inverter, and other components, as well as the complexity of the installation. Government rebates and incentives like the federal Small-scale Renewable Energy Scheme (SRES) can further reduce the upfront cost.
| Component/Factor | Estimated Cost (AUD) |
|---|---|
| Solar Panels | $10,000 – $15,000 |
| Inverter | $2,000 – $3,500 |
| Installation and Labour | $2,500 – $4,000 |
| Government Rebates (STCs) | -$5,000 to -$6,000 |
| Total System Cost (Post-Rebate) | $15,000 – $25,000 |
These costs can vary depending on the quality of the panels, inverter, and the complexity of the installation
Inverter and System Performance
A 20kW system is typically paired with an inverter of similar capacity. Inverters convert the direct current (DC) generated by the solar panels into alternating current (AC) that can be used by appliances. Common inverter sizes for a 20kW system range between 15kW to 20kW, depending on the grid regulations and specific requirements of the property
Considerations for Battery Storage
Adding battery storage to a 20kW system can enhance energy independence by storing excess electricity for use during peak times or when solar production is low.
- Recommended Battery Size: 15 kWh to 30 kWh, depending on the desired level of self-sufficiency
- Cost of Battery Storage: Solar batteries generally cost between AUD 1,000 to AUD 2,000 per kWh of storage capacity
What Are the Cost Implications of Adding a Battery?
The total cost of adding a battery to a 20kW system can range from AUD 15,000 to AUD 30,000, depending on the size and brand of the battery. Although this adds to the initial cost, it offers long-term benefits like increased savings by reducing grid reliance and greater protection during blackouts
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 20kW Solar System?
Start your journey towards energy independence today! Contact our certified installers for a free, no-obligation quote tailored to your property and energy needs.