Solaray Energy is now 1KOMMA5° Sydney and 1KOMMA5° Melbourne.

background image

The Price of a 13kW Solar System in Sydney

A 13kW solar system offers substantial benefits for large Sydney households. By considering factors like system quality, power usage patterns, and microinverter technology, you can maximise your investment and experience significant savings on your electricity bills.
Tom Sedgwick
Updated at
Reading time
3 min

Thanks to dropping prices and government incentives, 10kW-15kW systems are becoming increasingly popular. A high-quality 13kW system, including a top-tier inverter and premium solar panels, can start around $10,500 fully installed. That pricing is after the rebate.

In Australia, the Small-Scale Renewable Energy Scheme (SRES) offers rebates that can significantly reduce the upfront cost of your system. This incentive helps households to slowly transition to solar energy.

There are more cheaper options available in the market. However, lower-priced systems may use less reliable panels with shorter lifespans and lower overall output.

Here at 1KOMMA5°, we focus on quality and performance. That's why we recommend using premium brands that offer high efficiency with excellent warranties. This ensures your system produces maximum power for years to come.

For a large system like 13kW, we install solar panels from Trina's Vertex Series and Enphase Microinverter. Trina and Enphase are known for their best-value products and reliability. These recommended brands were based on our successful installations over the years.

10KW LG EN Glenhaven

The Output of a 13kW Solar System

Estimates suggest a 13kW system facing north in Sydney will produce an average of 51kWh daily. However, our systems often outperform expectations, thanks to high-quality components.

As we can expect, your daily average energy output is higher during the summer season than in winter. On a sunny summer day, you could even generate over 70kWh! That's enough power to offset your daytime energy use.

Because a 13kW system can produce so much power, you might want to consider ways to use it all.

We recommend installing your panels across multiple roof sections to spread power generation throughout the day. Battery storage can also be a great option. It allows you to use extra solar power in the evenings when the grid produces less electricity and rates are often higher.

13kW Solar System Output

A 13kW Solar System – The Key Numbers

13kW System
Number of Panels30 x 440W Panels
Output50 kWh a day average (see below)
Potential Savings$1000 – $1300 a bill depending on your cost of power
Average Payback Period3 to 6 years
CostFrom around $10,500 to around $16,300
Suited toLarger homes using on average around 50 kWh a day during the daytime (or over 24 hours with battery storage)
Battery Enphase IQ Battery Tesla Powerwall
Capacity5kWh per battery13.5kWh
Availability Currently on pre-orderIn stock
Warranty15 years & 6000 cycles10 years
Dimensions 98cm x 55cm x 18.8cm115cm x 75cm x 15cm
Compatibility Enphase Solar Systems (Not the M-Series MIcroinverters)All inverters
Backup when grid is downYes Yes
Storm GuardYes Yes
Power3.84 kVA continuous power (200% surge) per battery5kW continuous and 7kW peak
Price for retrofit to an existing solar system1 Enphase battery with monitoring and installation from $9,990Tesla Powerwall 2 including installation around $14,500
Repayments From $206/month*From $287/month*

How Much Will a 13kW Solar System Save Me?

A 13kW system can significantly reduce your power bills, saving you up to $1,000 to $1,300 per quarter. However, these savings depend on your energy usage during the day.

To maximise your return, you'll ideally use a lot of power when your system is generating the most. For instance, large families or households with pools and air conditioning are good candidates for large solar systems.

To increase your solar savings, find out more about how solar power reduces your power bill.

Number of Solar Panels for a 13kW System

The number of panels depends on their efficiency. High-efficiency panels allow us to use fewer panels while still achieving the desired output.

A 13kW system can use 34 high-efficiency 390W panels instead of 47 standard 275W panels. It not only saves you roof space but can also potentially improve the aesthetics of your solar installation.

13kW Micro Inverter System

For larger systems like 13kW, we highly suggest using microinverters. Microinverters make each solar panel independent, allowing for more flexible panel placement and maximising power output in all conditions.

This technology is especially useful if you want some panels facing west to capture the afternoon sun for time-of-use billing. Microinverters also bypass a potential weak link in traditional systems - the central inverter.

If the central inverter fails, your entire system goes down. With microinverters, even if one panel experiences an issue, the rest of your system continues to generate power.

Microinverters offer several advantages, especially for large systems. To learn more about the benefits of microinverters, check out our guide on 10 key benefits of microinverter systems.

Request for a solar or home battery storage quote today to see how much you can save!


Read more articles from the blog: