A 19.9kW solar system is a good fit for large residential properties with high energy demands and small to medium-sized businesses. Perth and Adelaide households with 5+ residents, daily electricity usage exceeding 25 – 30 kWh or who run ducted air-conditioning, electric pool pumps or have multiple electric vehicle (EV) chargers, find that a 19.9kW solar system is perfect for their current and future needs, as do small commercial and industrial sites with heavy energy demands during daytime hours.
Homes and businesses looking for future-proof solar setups find that 19.9 kW solar systems pair well with high-capacity battery systems, enabling them to store large amounts of energy for use during nighttime, peak and other periods, and provide backup and blackout protection.
MLEC Solar designs, supplies and installs 19.9kW solar systems with high-quality components from leading brands for Perth and Adelaide residential and commercial clients. Get in touch with the MLEC Solar team in your local area to book your free site consultation today!
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A 19.9kW solar system in an Australian metro area like Perth or Adelaide typically needs 40 to 45 solar panels, depending on each panel's output. This is because higher-output solar panels require fewer panels overall to make up the system. To install a solar system this size at home or work, you'll need approximately 100 m² of unshaded roof space.
In Perth and Adelaide, a 19.9kW solar setup is typically paired with a 15kW solar inverter. There are several reasons for this, including the DC-to-AC ratio, which allows solar panel capacity (DC) to exceed inverter capacity (AC) by up to 133% and still qualify for the relevant solar rebates and schemes at the Federal, State and Local Government level.
The key racking system components for a 19.9kW solar system include mounting rails (these are extruded lightweight aluminium channels that run beneath the solar panels to provide support and weight distribution), roof attachments, along with a variety of specialised earthing and grounding hardware, brackets, clamps, and metal clips.
You'll find that most high-quality 15kW inverters – the size typically paired with a 19.9kW solar setup– come with built-in Wi-Fi and manufacturer apps. This enables you to view real-time energy data and make informed choices about your energy usage. What's more, you can add third-party hardware for more features or functionality with your solar setup.
Taking factors such as location, weather and site conditions into account, on average, a north-facing 19.9 kW solar system produces 75–100 kWh of electricity per day (27,000–36,000 kWh annually). For homeowners in sunny regions, like Perth and Adelaide, the average is higher than most other capital cities and metro areas across Australia.
However, the amount of electricity your system produces depends on the season, with summer production usually stronger than in winter because of the longer daylight hours, and site conditions, including roof direction and roof pitch, and the shade from trees, parapets and nearby buildings. If you’d like to gain a stronger understanding of how much energy a 19.9 kW solar system will produce at your home or workplace, book a consultation with MLEC Solar today.
To accommodate the 40 – 45 solar panels required for a 19.9kW solar system, you’ll need approximately 95 to 110 m² of unshaded roof space. Ground-mounted systems require more space than roof-mounted systems, with the typical ground-mounted system requiring approximately 110 to 120 m² of unshaded space.
While a setup this size has considerable space requirements, with strong long-term benefits, including a future-proofed solar system and significantly reduced – if not eliminated – energy bills, a 19.9kW solar system is a worthwhile investment for many Aussie households and businesses. Book a site consultation to determine whether your property has the space to accommodate a 19.9kW solar system.
Whether you’re looking at a 19.9kW solar system as a residential solar system in Adelaide or a commercial solar system in Perth, a setup this size delivers notable benefits. These include:
Along with the considerable financial benefits, installing a 19.9kW solar system at homr or at work delivers significant liveability, usability and technical benefits.
A local MLEC Solar expert will provide a comprehensive assessment of the site to determine the optimal location for the solar panels and mitigate any shading issues.
Once the completion of the site assessment is complete, we then obtain all the required permissions and documentation from your local energy network operator and retailer.
Depending on site complexity, accessibility and other site-specific factors, it generally takes 3-5 days to install a 19.9kW solar system in Perth or Adelaide.
To ensure your solar system continues to work optimally and identify issues early on to mitigate long-term problems, regular and ongoing solar panel maintenance is essential.
To ensure your 19.9kW solar system delivers the highest efficiency levels over its 25-year lifespan, solar system maintenance is essential. However, maintaining your system is simple and cost-effective. Solar panel and system maintenance involves routine cleaning, digital performance tracking, and periodic inspections by a local solar expert, like MLEC Solar. Be sure to discuss the maintenance required to keep your system operating optimally during your initial site consultation – book your site consultation with MLEC Solar in Perth or Adelaide today!
Most solar panels on the Australian market are backed by a 20 to 25-year warranty and most inverters are backed by a 10 to15–year warranty. When researching products for your new system, you’ll find that higher-quality products are typically backed by longer and more competitive warranties. Always review the warranty terms carefully before choosing your components and discuss your energy needs and goals, and the products you’re considering with a trusted local solar expert, like MLEC Solar in Perth and Adelaide.
By producing around 27,000–36,000 kWh annually and displacing the power that would be drawn from a fossil-fuel-reliant electricity grid, a 19.9kW solar system generates an annual carbon offset of approximately 11 metric tons of CO₂. That equates to approximately 275 to 330 tons of carbon dioxide over its 25 – 30 year operational life – this equates to taking 2.4 passenger vehicles completely off the road or planting 185 trees and letting them grow for 10 years. While it has have a manufacturing energy footprint, a 19.9kW system pays this back in 1 – 4 years and operates ‘in the green’ for the remaining 20+ years of its lifespan.
Yes, most 19.9kW solar systems are designed to be easily expandable, allowing you to add more panels if your energy needs increase.
While most roofs can accommodate a 19.9kW solar system, factors such as roof orientation and angle, shading, and structural integrity may affect the feasibility of installation. A professional assessment is strongly recommended to ensure your roof is suitable. You should also assess the condition of your roof, which should be in good condition and, ideally, less than 15 years old. This will minimise the need for repairs or replacements after installing your new 19.9kW solar system.
A 19.9kW solar system can significantly increase your property’s value and make it more appealing to homebuyers if and when you decide to sell. This is because a solar system represents a valuable asset that can reduce electricity bills and provide a source of income through net metering or selling excess electricity back to the grid.
Before installing a 19.9kW solar system in Perth or Adelaide, consider factors such as your property’s sun exposure, roof condition, local regulations, financial incentives, and your energy consumption patterns. Consulting with a solar professional can help you make an informed decision.
The excess electricity generated by a 19.9kW solar system is typically fed back into the grid, earning you credits (i.e., a ‘feed-in tariff’) through a process called net metering. If you have a battery system installed, the excess electricity is first stored in your battery for use at night or during low solar production periods.
