6.6 kW solar system

Let Us Help You to Choose the Right 6.6 kW Solar System for Your Home

A 6.6 kW Solar System is designed for a household with 4-6 people on average. It produces a power of 20-27 kWh per day when panels are facing North.

Our 6.6kW solar system is ideal for medium-sized or standard households. Bring Ultimate Energy into your home and experience the Tier 1 solar technology.

6.6 kW solar system

Why you should choose a 6.6 kW Solar System

In Sydney, medium to standard-sized houses is increasingly opting for the 6.6 kW solar system. Moreover, it can provide around 6.6 kW per hour and better value for money than 5.5 KW solar system. Solar can also help to reduce carbon footprint while increasing the value of your property. Fifteen (15) solar panels are mostly used in 6.6kW solar system depending on the wattage of the solar panel.

The 6.6kW solar system is the ideal option for creating your own limitless source of electricity utilizing the sun’s energy.  It can provide enough electricity to completely reduce your power cost.

Undoubtedly, the 6.6kW solar system is the most comprehensive and cost-friendly system for medium families.

A 6.6kW solar setup, equipped with a battery, is an outstanding option for both homes and small enterprises aiming to lessen their dependence on the utility grid, cut down on energy expenses, and maintain power access during blackouts. Here’s a detailed analysis of such a system:

Components and Capabilities of 6.6 KW Solar System

Solar Panel

  • Opting for high-efficiency panels from well-known manufacturers can ensure the best possible energy yield even in tight spaces.
  • Opting for high-efficiency panels from well-known manufacturers can ensure the best possible energy yield even in tight spaces.
  • Warranties for these panels are usually 25 years, guaranteeing their reliability over time.
  • Typically, a 6.6kW system includes around 18-22 panels, each capable of generating between 300-370W of power


Warranties for inverters are typically 10 years.


  • The battery size can vary, but a common choice for a 6.6kW system is a battery with a capacity of 10-15kWh, enough to store surplus energy generated during daylight hours for nighttime or cloudy periods.
  • Lithium-ion batteries are the preferred choice due to their efficiency, durability, and compact size.
  • Warranties for batteries usually cover 10 years or a certain number of charge cycles.


  • A 6.6kW system with a battery allows for energy self-sufficiency, reducing reliance on the utility grid and shielding against escalating energy costs.
  • By utilizing stored energy during peak demand periods when electricity prices are higher, it’s possible to significantly reduce utility bills. Additionally, excess energy can be sold back to the grid for a feed-in tariff.
  • Solar energy is a clean and renewable resource, contributing to a reduction in carbon emissions.

Security of Power

The battery storage ensures a backup power supply during utility outages, providing peace of mind and continuous power access.


  • The initial investment for a 6.6kW solar system with a battery is considerable. However, government incentives, rebates, and financing options are available to help offset these costs.
  • Sufficient roof space and the right orientation are necessary to maximize the system’s energy production. The condition of the roof and any potential shading should be evaluated before installation.
  • Maintenance requirements for solar systems are minimal, but regular cleaning of the panels and monitoring of the system’s performance are essential to keep it operating at peak efficiency.
  • Performance and Return on Investment
  • On average, a 6.6kW solar system can generate between 24-30kWh of electricity daily, depending on the location and weather conditions.
  • The payback period for a 6.6kW solar system with a battery is typically between 2 to 3 years, after which the system can provide free electricity for the rest of its operational life.
  • Customer Reviews
  • Customers generally report high levels of satisfaction with their 6.6kW solar system with a battery.

CEC Accredited Designers & Installers

Ultimate Energy has Sydney’s most effective, skilled, and trained solar system installers for commercial and residential projects.

A system designer forms the layout of panels, inverters,  batteries and all the electrical components.  The solar panel’s system installer put the panels on the roof.

To be accredited by the clean energy council solar panel system installer is required to have an electrical license.

Clean Energy Council (CEC), is the sole body for accreditation in Australia.

How Long will it Take to Pay Off a 6.6 kW Solar System?

The 6.6kW solar system has been considered as one of the most cost and energy-efficient for medium homes and 6.6KW generally pay off in just 3 years.

6.6kW Solar System daily output

A decent medium to large house needs around 24kW of electricity in a day. Luckily, a 6.6kW solar system can easily generate 24kW or even more. However, A number of elements can have an impact on the overall construction of a system, including:

  • Shade (even if it’s only a small amount)
  • Number of peak sunshine hours
  • Panel adaptability

Every day, many rooftops receive at least 5 hours of peak sunshine in Australia. It implies that over the course of a year, a 6.6KW solar power system will provide an average of 20kW to 27kW of power in a day.

Battery & Inverter details

The 6.6kW solar system with a battery bundle allows you to harness the sun’s energy at any time of day or night. However, Battery backups options are rather expensive sometimes but can also extend backup time at night.

A 5KW inverter comes with a 6.6kW solar panel system. Ultimate Energy provides personalized inverter options to its customer, According to their need and choice and we deal in different brands like Solis, Fronius and Growatt etc.

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