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We at Solar Galaxy estimate that a typical home needs between 18 and 36 solar panels to cover 100% of its electricity usage. The formula for calculating the number of solar panels required is system size divided by production ratio divided by panel wattage.

How Many Solar Panels Do I Need For My Home

Solar galaxy offers Residential Solar Systems designed for small to big houses. Our solar system uses 18, 27, and 36 panels to adequately power your home according to your roof space.

  • To generate 6.66KW of solar panel power output, you’ll need 18 panels x 370W.
  • To generate 9.9KW of solar panel power output, you’ll need 27 panels x 370W.
  • To generate 13.32KW of solar panel power output, you’ll need 36 panels x 370W.

Considerations for How Many Solar Panels You Need To Power a Home

You can calculate how many panels you need for your solar energy system by multiplying your household’s hourly energy requirement by the peak sunlight hours for your area and dividing that by a panel’s wattage. The number you’ll need to install an effective solar array depends on geographic location, panel efficiency, panel-rated power, and how much electricity you usually use.

Common appliances – regular household

A solar energy system can meet all the energy requirements of a regular-sized home’s appliances. A property owner can decide on how many solar panels will be used in the solar system on his roof space to complement the supply from the main grid.

How much electricity is needed in a home plays a crucial role in influencing the type of the solar system, depending on whether the property is partially or totally disconnected from the primary grid. Going off the grid would mean that a different and more powerful solar energy system must be mounted to meet all the power demands. For a regular-size home, Solar Galaxy recommends using 18-27 solar panels to generate 6-9KWH.

Large houses and luxury homes

For large houses, we recommend using between 27-36 solar panels that can generate 9.9-13.32KWH since air conditioners account for the largest portion of home energy usage.

Panel size, roof space and output factors

The solar system size can be essential if your home is small or has an unusually shaped roof. While those with a large roof may sacrifice some efficiency and buy more solar panels to achieve the ideal energy output, homeowners with a smaller roof space must be able to use fewer small high-efficiency panels – like those from SunPower to get optimal output.

How to Calculate How Many Solar Panels You Need

You can calculate how many solar panels you need by multiplying your household’s hourly energy requirement by the peak sunlight hours for your area and dividing that by a panel’s wattage.

Your average energy requirements

Examine your utility statement for typical consumption. Look for “Kilowatt Hours (or kWh) Used” or something similar, and then take note of the time span (usually 30 days). If your statement does not display the number of kilowatt hours used, search for starting and ending metre readings and deduct the prior measurement from the most current one.

Your current electricity usage in watts

Your desired daily average for calculating your solar demands is your average energy use. That is the number of kilowatt-hours your solar system must generate in order to meet most, if not all, of your power demands.

The climate and amount of sunlight in your area

The peak sunlight hours for your particular location will directly impact the energy you can expect your home solar system to produce; it just means that in some areas, the homeowner would need more solar panels.

The efficiency and size of the panels

Not all solar panels used in a solar power system are alike. Photovoltaic (PV) solar panels (most commonly used in residential installations) come in wattages ranging from about 150 watts to 370 watts per panel, depending on the panel size (how many solar panels you need) and efficiency (how much solar power they can produce from sunlight) and on the cell technology. The more efficient the solar panels, the more watts they can produce and the fewer you will need on your roof to provide the same amount of electricity.

How many panels do you need for a specific solar system size?

To calculate how many solar panels you need, you need to know:

  • Your typical energy needs
  • Your current energy consumption in watts
  • The local climate and quantity of sunshine
  • The efficiency of the solar panels you’re thinking about purchasing
  • The actual dimensions of the solar panels you’re thinking of purchasing

A straightforward way of answering how many solar panels you need is to consult Solar Galaxy’s professional solar installers, who can give free home solar evaluations.

CEC Accredited Solar Installers and Engineers

Our team comprises industry experts and Solar Installers/Engineers accredited by the Clean Energy Council (CEC). We’re compliant with all Australian solar standards and work to deliver the best possible results, regardless of your needs. Additionally, the CEC approved all panels and inverters we supply and use Mono Crystalline perc technology to maximise efficiency.

Install a Solar System with Experts from Solar Galaxy

With solar panels becoming more efficient and government rebates making panels more affordable, there has never been a better time to get solar panel installation. Find out how many solar panels you need by calling our experts today if you’re considering solar power for your home or business. Get a Free Solar Consultation and all the information you need to decide. Call us today on 1300 339 596.

Frequently Asked Questions

What factors affect how many panels you need for your solar system?

The factors that affect how many solar panels you need are:

  • Your typical energy needs
  • Your current wattage consumption
  • The climate and quantity of sunshine in your location
  • The efficiency of the solar panel you’re thinking about purchasing.
  • The physical size of the solar panel you’re considering.

Are solar panels worth investing in?

Yes, since solar panel system has become much more efficient, their technology has become more reliable and affordable, making them a good investment for many Australians. A solar panel system can significantly reduce your electricity bill at your home or business.

How much electricity bill savings can you get from using solar?

If enough solar panels are installed to cover the average electricity consumption per month, a household may not have to pay for electricity usage at all.

What are the advantages of using solar power?

  • A residential solar system that produces solar power is a fantastic method to reduce electricity usage while mitigating carbon impact.
  • Solar panel installation helps prevent harmful greenhouse gas emissions, reducing global warming.
  • A solar panel emits no pollutants and is ecologically benign.

What type of solar panel is best for homes?

A solar array composed of monocrystalline solar panels is the best type due to their high solar efficiency.