Why Should You Buy Solar Panels for Your Home?

Solar panels make it possible to harness the energy from the sun. The rising cost of electricity generation has made solar power systems the new sought-after source of energy for Australians. Besides being good for the environment, they offer significant savings over their lifetime. Solar panels cost a lot less than conventional sources of energy and produce greener energy to align with the Nation’s Sustainable Development goals.
At National Solar Company, we offer solar panels for sale for all kinds of projects including home/personal use, commercial use as well as enterprise scope projects. solar1 Image

What Size Solar Panel System do You Need for Your Home?

The size of the solar power system is directly proportional to the electricity consumption needs of the house owner. You need to also assess the amount of electricity you need and your own power usage patterns to decide the side of the solar panel system you need for your home. On average, an Australian household uses 20kWh of energy per day. Solar experts suggest that a 5kW solar system is more than enough to meet the daytime power needs of such homes. Solar controllers, also known as solar charge controllers or battery controllers, are an essential part of the grid and solar systems. Solar charge controllers protect your batteries by regulating and optimizing the flow of solar power.

How Much do Solar Panels and Their Installation Cost?

  1. Power generation capacity (in Watts)
  2. Physical size
  3. Brand
  4. Warranty Period
  5. Certifications

The total cost of a solar panel installation also depends on the number of panels installed and the modules used that reduce the cost per unit. All in all, homeowners must always compare the costs of whole solar installation systems that they plan to get, instead of prices of individual panels.

How to Assess Solar Panel Quality?

Solar buyers must consider both manufacturing and material details in addition to cost when choosing the best solar panel for installation. There are three tiers of manufacturer quality of solar panels

  • Tier 1 Solar Panels

    Tier one solar panels are manufactured by the top 2 percent of solar PV (photovoltaic) panel manufacturers. Tier one manufacturers are usually vertically integrated, so they control each stage of the solar panel manufacturing process. They invest in R&D for their products, use advanced robotic technologies and have built their own brands in the solar landscape. These top-quality manufacturers use the best grade of silicon to produce solar PV cells that excel in terms of longevity. Tier 1 Solar Panels are cost-efficient in the long run. However, buyers should be wary of false claims of being 'Tier 1' that certain manufacturers make. A little due diligence will help you determine the best solar panels for your needs.

  • Tier 2 Solar Panels

    Tier two solar panel manufacturing companies invest a little less in research and development. They count on a mix of robotic and manual assembly on production lines and have only limited experience in manufacturing. Although they produce good panels at reasonable prices, it may or may not work in favour of the buyer..

  • Tier 3 Solar Panels

    A big chunk of Tier three solar PV manufacturers belong to this category. They only assemble panels and never manufacture their own cells. There make no investment in research and development. Offering the cheapest solar installations in the market, Tier 3 manufacturers serve as human production lines for manual soldering of solar cells. This is why the quality of Tier 3 solar panels varies from operator to operator and day to day. Although a cheap option at the point-of-purchase, these solar panels cost much more in terms of reliability and electricity output in the long run..


How Much Money Does a Homeowner Save by Using Solar Power?

The money you save when you install solar panels depends on the span of daily sunlight and the size and angle of your roof. It also depends on the local electricity rates you pay for conventional power generation

On average, solar power installations like solar panels can reduce the routine power bill by around $400 per year per kW of solar.

With a solar battery, you can replace your entire power consumption with solar power installations. Solar batteries help you store the excess solar power to be then used in the evening or as and when needed. Solar experts size up the solar power generation system in such cases based on the average daily power usage during 24-hour windows. For a rough idea, a small 5kW system usually generates around 20kWh per day. It can save you up to about $500 on a quarterly bill.

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Solar Panels: The Concise Buying Guide

Here are some significant points you should keep in mind when buying solar panels aside from looking at their prices

  1. Firstly, assess the system capacity you need and can afford.
  2. Seek help from a solar expert to see if your roof faces the right direction. Generally, north-facing solar panels produce energy to their optimal capacity
  3. Get a shading assessment of your roof done from a solar expert to ascertain that there are no trees or other structures that share your roof
  4. Get approvals from the local council, if needed
  5. Work out your system's payback time.
  6. Invite multiple quotes from CEC-accredited solar companies to get the best deal.
  7. Conduct research around how the panels perform in real-world scenarios. Get details about their positive tolerance, temperature coefficient rating, PID & LID resistance and also efficiency.
  8. Consider how the module is manufactured and the materials that have been used..
  9. Study the aspects of solar installations and performance warranties before you make any purchases
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What Factors Should Buyers Consider When Purchasing Solar Panels?

  • Size and Power Generation Capacity

    The power generation capacity of solar panels is determined in watts and is a significant determinant for its pricing. You must assess the output of each solar module in watts before making any purchase

  • Tolerance

    Tolerance factor describes the range that a solar panel will either exceed or fail to meet its rated power. In an ideal case scenario, the solar module has a positive tolerance rating where the module generates power equal to its nameplate wattage and sometimes even more in stars testing conditions. In case of negative tolerance rating, the solar module generates an output below the nameplate wattage even in ideal conditions due to quality control issues.

  • Longevity

    The longevity of a solar polar panel warranty is a measure of the manufacturer's confidence in its products. Premium solar panels boast of a performance warranty that pays back for their cost in full.

  • Temperature Coefficient

    The temperature coefficient rating determines the impact of heat on the way a solar panel operates after installation. Buyers must choose solar panels that come with a low percentage per degree Celsius for better outcomes. Although the price of a solar module with low-temperature co-efficiency can be a bit steep, given Australia's extreme heat, the extra cost would pay for itself

  • Conversion Efficiency

    To estimate the efficiency of a solar panel, assess how well it converts sunlight into electrical energy in terms of how much power your system generates. For solar panels priced the same, one with a higher conversion efficiency would be better value for money

  • PID Resistance

    PID is an abbreviation for potential-induced degradation. Stray currents that result from certain climate conditions can cause substantial power loss. However, the right solar panels offer little or no PID

  • LID Resistance

    LID is an abbreviation for Light-induced degradation. LID Resistance occurs in the first few months after installation. This kind of resistance usually stabilises after a period and can reduce the amount of power the module produces. Choose solar panels with low or negligible LID resistance

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How to Assess Solar Panels in Terms of Installation, Standards and Warranties?

Australian residents must look for a CEC-accredited company for solar panel installation. Choosing a solar panel vendor that is CEC-accredited makes you eligible for Small-scale Technology Certificates (STCs).This useful commodity can be applied against the purchase of a renewable energy system

Also, the warranty is only honoured as long as the company operates. Choose a trustworthy, established brand of the module instead of an obscure one

Since you would buy the best solar panels from retailers or installers, the choice you make here is important too. An installation company that is a certified service agent for solar panel warranty work with the manufacturer you select would be the best choice.

A solar panel vendor that is a signatory to the CEC's code of conduct and has significant experience in the field would be the perfect fit. Choose a solar panel manufacturer who has a distinguished track record, specialist expertise and relevant experience.

What are Some of the Best Solar Panels Buying Hacks that Customers Must Keep in Mind?

  • Focus on the power output on the solar installation as a whole, instead of the size and number of solar panels being installed.
  • Focus on the nominal power rating and actual power output of each solar panel. This will limit the total number of solar panels you need to buy and install.
  • Homeowners with spacious roof space enjoy the liberty of installing cheaper panels with low efficiency. However, they end up investing in a large number of such panels.
  • A smaller number of panels means you save in terms of installation cost.

Why Buy Solar Panels from National Solar Company?

National Solar Company offers solar panels that generate optimal savings in Australian conditions. Being a 100% Australian owned and operated company, our expertise ranges beyond solar installations and includes geographical and topographical knowledge. We have been around more than 18 years, delivering long-lasting and technologically revolutionary products that excel in their own right. With our state-of-the-art products, we aim to create a sustainable future and minimise the carbon footprint of Australian families and business organisations.


Solar panels are a vital part of solar energy systems. Without them, you wouldn't be able to harness the energy from the sun. We've drawn on years of experience to bring you the panels best suited to generate reliable savings in Australian conditions. Delivering long-lasting and technologically-proven products, our products stand the test of the time.


  • Local Australian Warranty
  • 25 Year Linear Power Output Warranty
  • 10 Year Parts and Labor Warranty
  • 10 Years Guaranteed 90% Power Output
  • 25 Years Guaranteed 80% Power Output
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