Solar FAQs

Frequently Asked Solar Questions

Over the years we’ve become accustomed to hearing the same questions relating to having a solar photovoltaic (PV) system installed. So, as we are dedicated to education and helping our customers as much as we can, we have compiled a list of our most frequently asked questions to help you on your journey.

1. What is a grid-connected solar system?

A home without a solar system draws its energy from the electricity grid. A grid-connected solar system is a solar PV system that is connected to the electricity grid. Your household will consume the energy that is created from your solar system first, and if more is needed, it will draw the remaining electricity from the grid. It also allows your system to send power back out to the grid. If your household is not consuming the entire amount of energy that your system is creating, then that surplus is sent back out to the electricity grid. This surplus is measured and credited back onto your power bill. Depending on what state you live in and what electricity supplier you are with, this value will vary.

2. How much will my solar system cost me?

As an extremely broad question, the answer is dependent on a number of factors. The final price depends on what brand of system you choose, how many panels you have installed, whether you decide on a string inverter or microinverter and much more.

ALWAYS get multiple quotes to compare prices and remember that the most expensive quote doesn’t necessarily mean equate to the best system. In South Australia, on average a 5kW (kilowatt) system costs approximately $5,500 but there are some elements that will affect this price.

3. What size system do I need?

To answer this question, your system designer will need to understand your energy habits such as your daily usage amount, your energy usage patterns, your location, etc. From here, they will be able to offer you the correct sized system. While your installer should be able to offer you a rough estimate just by receiving your latest electricity bill, they should not be able to present you with an ACCURATE system size without first asking these questions.

4. How many solar panels will I need?

Once your installer determines the system size that your household requires, they will then look at what panels will best suit your system. Not all panels are created the same, or yield the same amount. So your installer should be working out which panels are most appropriate for your lifestyle and energy patterns. They will also need to look at elements such as your roof size and budget.

5. Will anything else affect the price of my system?

There are a few added elements that will affect the overall price of your system. Each solar PV system is tailored individually, so don’t assume that just because your family member has a 5kW system with X amount of panels on their home, means that you will pay the same price for the same system. Factors need to be taken into account such as additional labour costs for things like a double storey roof, panel mounting brackets to angle your panels correctly if your roof is flat and much more.

6. How much money will I save with my solar system?

Typically, it can take anywhere from four to six years for a system to pay itself off in South Australia. Payback times depend on a number of things such as your location, your energy consumption, daily usage patterns, how well you maintain your system, the size of your system and your feed-in tariff.

Ensuring that you have the correct sized system will speed up your payback times. Having a system that is large enough is important as it will not only cover your power consumption, but it will maximise your return on investment. But having a system that is too large will mean that you’re exporting a large surplus of energy back into the grid and as feed-in tariffs are no longer as high, you will be selling your power for less than your electricity rates. So it’s important to ensure that your system is correctly sized to maximise your return.

7. Is my roof right for solar?

Not every roof is suitable to have a solar system installed on it. Generally, there are six key factors that will determine the suitability of your system.

  • Orientation: While a north-facing roof is best for optimum production in South Australia, it has been proven that panels facing north.
  • Shade: Solar panels only produce maximum energy in full sunlight. If a part of a panel becomes
    Image showing partial shading of solar panels
    Shadows on solar panels can affect the generation values of the entire system.

    shaded, then the output level is reduced. It is therefore necessary that your roof does not experience any shade if possible. Vegetation and overgrown trees can easily be removed, but shade from chimneys or poles on the roof is much more difficult to work around. If there are certain ares of you roof that do experience shading during the day, then your installer may offer you a system with microinverters to avoid your output dropping too much.

  • Size: Your roof has to be large enough to have the space for the number of panels that you require. The minimum sized system that can be installed in Australia is a 1.5kW, which generally equates to 6 solar panels. If your roof is not large enough for 6 solar panels, then you may need to look at other options.
  • Age: The age of your roof will be an indication of its structural integrity. If you are in an older home and are unsure about whether your roof will be able to safely support a solar system then it is best to have an inspection done beforehand.
  • Pitch: Solar panels
    Solar panels installed on a roof with a very steep pitch
    The pitch of your solar panels can greatly affect their power generation values.

    generate maximum power when they are positioned perpendicular to the sun. Your installer will need to take the pitch of your roof into account when installing your panels at the optimal angle. If the pitch of your roof is too flat or too steep, then your installer will need to use mounting brackets to angle the panels correctly for maximum yield.

  • Material: While solar panels can generally be installed on any roof, there are some exceptions. Metal roofs are often the best to install a system on, while tile roofs can be quite fragile and generate an extra cost.

8. Does the temperature during the day affect production results? Does hotter weather equal greater energy production?

Many people believe that hotter weather produces more energy, however, it is much the opposite. The hotter the day, the less energy that your system will produce. This is because a solar system converts LIGHT into energy and not HEAT.

A solar panel has an optimal temperate range that is best for producing the greatest amount of energy. As the temperature rises out of this optimal range, the production efficiency begins to decrease. Excessive heat is therefore detrimental for a solar panel’s production. Instead, the days that you will find you produce the most energy are on sunny, cooler days.

9. Is there any maintenance involved in having a solar system on my roof?

Despite the rumours, solar panels are NOT self-cleaning. So, like any other appliance or installation around the home or office, we do ask that you occasionally inspect and perform a small amount of maintenance on it. You can find a copy of our maintenance manual here.

10. Do I need developmental approval to have a solar system installed?

Generally speaking, you shouldn’t need to get council or planning approval when having a solar system installed, however, there are a few instances in which you may. If you live in a council strata development, then getting approval from the body corporate may be required, or if you live in a heritage listed home then you will need to get council approval. If you are unsure whether or not you should be receiving approval, you can ask your solar installer or local council for guidance.

11. Will I still be using energy from the grid?

Yes. Your solar system only generates energy when there is sunlight, and when this energy is generated it needs to be used immediately. At night time when there is no energy being produced, your system will draw energy from the electricity grid so that you can continue to use the appliances within your home. Should you have a battery system however, it can store energy produced by your system to use when your system is not generating power.

Still unsure?

Solar systems are all individually tailored to ensure maximum power generation for your household. If you have any further questions, please do not hestitate to give us a call on (08) 8297 3422 today, to speak to one of our qualified installers.

Solar Shading – What Is It and How Do You Deal With It?

Up-close image of a residential solar installation being partially shaded by trees

What Is Solar Shading and How Can You Deal With It?

We all know by know that solar panels produce electricity from the sunlight. So it makes sense that when there is shade cast upon them, they produce less electricity. It would seem fairly obvious that the power output produced by the panels is reduced proportionally to the amount of area that is shaded – this isn’t true.

Most domestic solar systems include anywhere between 5-30 panels, and most of the time these panels are connected in a ‘string’. Smaller systems may only have one string while larger scale systems may have more. We find it easiest to explain a string of panels as a string of Christmas lights. Electricity flows from one bulb to the next, lighting up the entire string of lights. However, when one bulb blows, the whole string of lights fails. This is the same for a solar system connected in strong. Even if a small amount of shade falls on just one cell in the panel, the output of the whole string of panels is reduced for as long as the shadow remains. Instead, it is because when one panel fails, it begins to become an energy consumer, rather than an energy generator. The shaded panel begins to draw power from the other panels, who in turn are not producing their optimum or maximum output.

There are many different factors that can result in solar panel shading. Shade from overgrown vegetation (trees and plants), cloud cover, dirt, bird feces, etc. all cause an effect on overall power production. During the design and layout stage of having your solar system installed, your installer should have taken a look at your roof from above, using technology, and be taking into account many factors such as optimal sun direction. They should be designing your system to sit in a location where it is not shadowed for half of the day, e.g. behind a chimney or a tree.

Fortunately, while there aren’t many ways to completely eliminate solar shading, there are ways to manage it.

https://www.civicsolar.com/support/installer/articles/string-layout-shade-mitigation
https://www.civicsolar.com/support/installer/articles/string-layout-shade-mitigation

How To Manage Solar Shading

1. Regular cleaning of your panels

Cleaning your panels every three or so months ensures that they stay free of any on-surface shading that may occur. Running a hose from the top of your roof, directly down to wash away leaf litter and debris that can get caught on top of your panels. Using a squeegee or cloth to gently clean the more tough dirt and grime is fine, but scourers and high-pressure water cleaners are not.

2. Be aware of vegetation

Be aware of overgrown plants and trees that may cast a shadow on your panels. Make a point observing this every three months or so, to ensure that your panels remain in maximum sunlight for as long as they can. Also, remember to observe this at all times of the day, to see how they are affected as the sun moves.

3. Micro Inverters

Microinverters are just as the name suggests, however, they are much smaller and designed to sit underneath each individual panel. They perform the same function as a string inverter, however, they accept the output of that panel only, rather than a series of panels collectively. This maximises your total production output because if one panel fails, the others are not compromised.

They are slightly more expensive upfront, but as time goes on, the product price is dropping. Microinverters allow for an expansion of your system, so there are no restrictions when it comes to your system’s future and they are often labeled as the safer choice due to the minimised voltage running through them.

4. DC Optimisers

DC Optimisers are similar to microinverters in that they are also located on each individual panel. However, DC Optimisers, or power optimisers, are used in systems where a string inverter is involved. These DC Optimisers work with the string inverter to enable the maximum production from each panel individually, despite the fact that the panels are connected in a string. When a panel becomes shaded and its power output differs from the unshaded panels, the optimisers correct ‘mismatch’ of energy production between each panel by allowing it to function at its Maximum Power Point (MPP), and then converting that energy to the optimum voltage and current for the string inverter.

https://singingvegan.com/solar-power-best-worst-customer-service/
https://singingvegan.com/solar-power-best-worst-customer-service/

All of these factors should be looked at by your solar installer and they should be informing you of the best choice for your situation and requirements. Green Efficient Living solar installers use a number of programs to look at all of the factors required to provide you with a system that will work best for you.

To speak to one of our solar professionals today, call (08) 8297 3422 or fill out a request form on our contact page.

Why Do We Choose Enphase Energy?

Image of technicians phone showing a solar monitoring system

Enphase

 

Green Efficient Living made it very clear at the inception of our company that we would only align ourselves with businesses who project the same values as us. These values focus on providing our customers with high quality and reliable products, impeccable customer service, a dedication to innovation and being strong advocates for reducing environmental impact.

This is why Green Efficient Living promote and install Enphase Energy products for our solar installations. Enphase is a company dedicated to pushing the boundaries of solar technology and are passionate about developing new technologies that make energy ‘more intelligent, more connected and cost effective’.

Enphase Microinverter
Enphase continually design and update their products to provide their customers with the very best.

They design and manufacture products for solar generation, energy storage and web-based monitoring and are currently the market leader in microinverter manufacturing and distribution. The company was founded in 2006 and since then has grown to become a global leader in solar energy technology. In 2008, they introduced the world’s first microinverter system and just three years later they hit the milestone of having shipped one million micro inverters worldwide.

Eight years on and they have begun operating in 21 countries across the globe, opened their own research and development facility in New Zealand (March 2016), and have shipped over 15 million microinverters worldwide. During this time, they have won awards such as ’14th Fastest Growing Company (2013)’, ‘Technology Pioneer (2013)’, and ‘#1 Residential Inverter Supplier’.

But it isn’t just their size or expertise that makes them the industry leader and Green Efficient Living‘s choice. It’s their dedication to providing the very best products and services for their customers. Their web-based monitoring software, MyEnlighten, allows for complete connection and communication between your solar PV system and your home via an app on your phone or tablet. It lets you track your energy production in real time and monitor your system’s health through a status indicator. It also allows your solar installer to monitor and track your system’s production to make sure that everything is running as it should be.

Enphase Energy MyEnlighten
MyEnlighten allows your solar installer to view your energy production.

Enphase also has an Australian head office, which can give you peace of mind knowing that if something was to go wrong, or if you have any questions as all, we can easily get in touch with somebody local and get you an answer straight away.

They have a passion for providing an alternative energy resource that reduces our environmental impact and are driven by a sense of responsibility towards our planet and communities. Their systems have already helped to offset almost 6 trillion pounds of carbon dioxide worldwide…yes, 6 TRILLION! And that number is continuously growing.

Consistent and rigorous quality testing means that their products are at a consistently high level and are reliable in all conditions and climates. All Enphase products undergo one million ‘power-on’ hours of accelerated, long-term reliability testing prior to their release. Our confidence their products extends far beyond our business, as we have installed them in our own homes as well! This way, our customers can be assured that their products and systems are there to last.

Green Efficient Living always have our customers in the forefront of our minds with every decision that we make, so it is imperative to us that we work with companies who see the same value in that. This is why we use Enphase microinverters.

If you are considering having a solar PV system installed, or to see the MyEnlighten app working in real time, come into our office and let us discuss how using Enphase micro inverters can work for you. Alternatively, you can contact us here!