100kW Solar System | Price Guide to Commercial Solar Installations

100kW Solar System Price and Specifications

100kW Solar System | Price Guide to Commercial Solar Installations

Installing a 100 kilowatt commercial solar power system is the perfect way to cut your electricity bills, reduce your carbon footprint and boost your profits. The falling cost of solar products has resulted in many Australian businesses making the switch to solar energy. Taking advantage of clean energy is a great way to improve your brand in the modern economy. It shows business savvy to embrace forward-thinking energy solutions.

A 100 kilowatt solar photovoltaic system (100 kW solar pv system) is ideal for medium to large sized businesses with high energy costs. Installing solar can be extremely cost effective. Federal government and state government solar rebates help to reduce the upfront installation cost. 100kW systems have payback periods of just a few years, which is nothing compared to the 25 year lifespan of the system.

Power bills are a huge burden for large businesses. Australia wide, electricity costs have been rising significantly in recent years. Installing solar for businesses allows companies to turn this problem into an asset. Through energy cost reduction and electricity tariffs, your solar arrays will quickly pass their payback period and become highly profitable over the long term.

What is the cost of a 100kW solar PV system?

The Changing Solar Market

In recent years solar technology has improved and more manufacturers have entered the market. This has resulted in prices falling and product choices increasing. Businesses looking to install commercial solar are now able to customise their systems to suit their needs. Finding a balance between commercial solar costs and energy efficiency is easier than ever before.
For this reason it can be difficult to find an accurate estimate on the price of a commercial solar system. The range of prices has become so broad due to the number of ways you can customise your system. From the inverter and solar battery options, to the number of cells and type of technology in your solar panels. Prices also differ depending on which state you live in and the rebates available to you.

Solar Product Prices

The price range we have provided below is to be used as a guide only. The figures are intended to give an idea of the market value for 100kW commercial solar systems. For a personalised quote that is specific to your business, request a quote through our online form or give our specialists a call today.
Starting prices for 100kW solar systems in:

StateSolar PV System Cost
Queensland$65,000 – $80,000
South Australia$65,000 – $80,000
Western Australia$65,000 – $80,000
New South Wales$65,000 – $80,000
ACT$65,000 – $80,000
Victoria$75,000 – $85,000
Tasmania$85,000 – $95,000

Rebates (STCs & LGCs)

The amount of money you can save through government rebates are based on where in Australia you live. The Renewable Energy Council (REC) split the country into four zones based on the levels of solar irradiation in those areas.Those zones are each offered different levels of subsidies for the purchase of solar products.

The level of subsidy you receive is also dependent on which rebate you are eligible for. There are two distinct types of rebate.

Small-scale Technology Certificates (STCs) are available for purchases of solar systems that are under 100kW in size. These certificates are given as an up front rebate based on your solar system size.

Large-scale Generation Certificates (LGCs) are awarded to solar systems that are 100kW or larger. These certificates are not awarded upfront as they are with the STCs. Instead they are awarded annually based on the amount of energy your system generates. As such the amount you recieve is provided over the lifetime of your system rather than a single upfront payment.

The amount of certificates you receive per kilowatt varies in different zones. The value of certificates also fluctuates, making it difficult to provide you with an exact estimate.

As an example, in Melbourne you will receive roughly 14 STCs for every kilowatt of energy installed. Where the price of certificates is $35, this would result in a $49,000 upfront discount for a 99kW System. Installing a 99.9kW system would make you eligible for STCs rather than LGCs. In many cases STCs have a greater ROI than the large-scale rebate.

How much roof space is needed for 100kW commercial solar panels?

The amount of roof space that you will require will depend on the exact dimensions of the solar arrays that you choose. Lower quality panels with less efficiency will require more panels to generate 100kW. Higher quality panels will require less panels and therefore less space. Two key components to calculating the roof space required are the power of the panels and the size of the panels:

  • Most types of solar panels will be between 275 watts and 350 watts
  • Most panels are approximately 1.6 metres x 1 metre

Roof space needed to power a 100kW solar PV system with:

For an idea of the amount of roof space you will require for solar panels to power a 100kW solar system we have provided a guide below. These are approximate estimates based on the most common panel types. For an exact estimate of the roof space required for your commercial solar installation, contact our specialists on 1300076527.

  • 275-watt panels would require 364 solar panels = approximately 582 m2
  • 300-watt panels would require 334 solar panels = approximately 534 m2
  • 350-watt panels would require 286 solar panels = approximately 458 m2

How much electricity will a 100kW solar pv system generate?

The amount of electricity that your commercial 100kw solar pv system can generate is based on the quality of the components in your system and the amount of solar irradiation it is exposed to.

As such, a 100kW solar system in Brisbane will generate more solar energy than the same system would in Hobart. A 100kW system with a high quality inverter and panels will produce more electricity than a 100kW system with lower quality components in the same location.

Generally speaking you can expect your 100kW commercial solar system to generate around 150,000kWh (kilowatt hours) of energy each year. This works out to be 411kWh per day. This average takes into consideration the differences across locations and types of systems. You could therefore expect to produce more than this with high quality components and in areas of high solar irradiation.

How much value can a 100kW solar pv system bring my business?

A 100kW solar system is sure to save your company costs on energy bills while adding value in your sustainability profile and public image. In terms of quantifying your Return On Investment (ROI), that will depend on a number of factors.

How much you pay for electricity and the amount of electricity your business uses are two key considerations. You must also consider how much you paid upfront and how much of the costs you had subsidised by a government rebate. Some rebates can cover up to 45% of the initial price.

Most businesses with 100kW solar systems report annual savings between $20,000 and $50,000.

What is the payback period for a 100kW solar pv system?

The “payback period” of your solar installation is the amount of time it will take for your system to pay for itself. Through your reduced energy bills and tariffs earned from feeding excess energy back into the grid, your solar production will eventually cover the upfront costs of the system. Once you have completed this period, all of the energy produced by your system can be regarded as direct profit for your business.

With the aforementioned factors like rebates, energy prices and component quality taken into consideration, most 100kW commercial solar installations will complete their payback period within 3 to 5 years.

How can I improve the Return on Investment for my 100kW solar system?

There are many ways to improve the ROI of your system. Ensuring your system is appropriately sized for your energy usage is the most important step. After this, you can boost the efficiency of your solar system by choosing high quality components.

Finally there is the choice of what you do with the electricity you generate. Self-consumption has the highest value, as this way you are reducing the costs of buying electricity from an energy provider. If you are producing too much electricity to consume, you should then weigh up the value of either feeding that back into the grid for a tariff, or storing it with a solar battery.

Solar Inverters

Solar inverters are the part of your system that converts the energy you receive from the sun into usable A/C electricity for your home or business. The better your inverter, the higher the efficiency of this conversion. It’s always best to get a high quality inverter with a reliable warranty.

Solar Battery Storage

Storing your excess electricity is a great means of boosting your ROI. Rather than relying on the tariff rates offered by your energy provider, batteries allow you to retain your electricity for use at your convenience.

Feed-in Tariff Rates (minimum feed-in tariff & time varying tariff)

If you don’t have a solar battery, you should ensure you are getting good rates of tariffs from your energy provider. For more information on FITs, including minimum feed-in tariffs and time varying tariffs, check out our page on feed in tariffs.

Getting Started

If you would like to speak to a specialist about how installing commercial solar could help your business, give us a call on 1300 076 527.
For a free quote, call our helpline or request a quote from the online form on our website.

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