WHY SOLAR PANELS IN PERTH ARE A WISE CHOICE
Perth is one of the sunniest cities in Australia.
We also have some of the highest electricity prices compared to other states.
If you are considering solar panels for your home or office, then I am sure you have thought about the costs and returns so lets break it into easy to understand segments.
If you have a business that uses a lot of energy then solar becomes a lot easier to understand and justify.
Lighting a showroom or using energy for cooking or manufacturing is in most cases carried during the day when the sun is out which is why solar for business is a no brainer.
As a rough guide if you have an annual energy bill of $4000 then a 10kw solar system will greatly reduce this dependent on the sun received etc.
Recovery costs can be much faster due to the high daytime useage. Return on your investment and insurance against future price increases.
So what are the benefits for residential premises?
Well the first and the most obvious is the saving on your energy bills.
Solar panels will pay for themselves and after this happens you are actually getting a return which could be one of the best investments you make.
Rebates off set a large cost of the system but these are reducing every year – the longer you leave it the less you will receive. Having solar panels is an insurance against future energy cost rises.
New to solar panels? Here's a good place to start.
Like the idea of solar power, but not totally convinced it’s for you?
The best way to find out either way, is to speak to our consultant.
They can help you to understand how solar power works and which system is best suited for your needs.
An experienced consultant will determine the best system to suit your needs.
Call us on 08 9592 9099 for obligation free advice and quote.
How solar saves you money
When you’re producing your own power, you’re buying less from your retailer and selling your excess to them. Consider the following examples. If you have 3kW of devices running and you’re producing 2kW, after one hour you would have consumed only 1kWh instead of 3kWh, saving between 45c to 60c in that hour.
If you’re producing 3kW and only using 2kW, after one hour you would have sent 1kWh back to the grid and not purchased 2kWh, saving even more. Remember that kWh is “units” on many power bills.
Choosing the right system
Firstly, you need to check your power bill, as it will state your average daily consumption in kWh. Then you need to consider when you use your power, as you want to cover your daytime consumption as a minimum. Each kW of solar power will produce on average approx. 4.6kWh per day, but this will vary based on your location, roof orientation, shading etc.
So if your average daytime consumption was 12kWh, you’d need at least a 3kW system, if it was 20kWh, then a 5kW system. An experienced consultant will determine the best system to suit your needs.
Some frequently asked questions for newbies
Australia is a great place to take advantage of solar energy. Systems here will produce more than they would in most places throughout Europe, despite the uptake being higher there. In Australia, a north facing roof between 20 and 30 degrees is the most ideal aspect. Lower or higher pitches can also be used, often to great effect. Panels facing east or west will still generate good yields, typically only 15-17 percent less than they would on the north. Eastern panels will generate power earlier in the day then north and western panels will produce power later in the day. Many people decide to put a portion of panels on the western aspect, as it improves the production later in the day when many appliances are commonly used. Using the power you’re producing has financial advantages, which is why it can make sense despite the lower production.
Solar panels work on sunlight, not heat. Hotter days generally have more sunlight and hence better production, but the heat actually has a negative impact on them. Panels will never perform at their peak power output, as the test conditions they are subject to when they receive their rating will never be replicated in the real world (even in Australia). This is why suppliers give you an estimated energy yield in kWh (units) per day, as this is what you buy and sell from your energy retailer. In the middle of a perfect day in summer, you could expect to see your panels reach around 85 percent of their peak power output. Early in the morning, late in the day or in overcast conditions, this will be reduced. Your power output will bounce around a lot, so focus on your energy (kWh) yield when looking at the performance of your system.
Yes, and it’s usually quite significant. Solar panels facing north should ideally be in full sun from at least 9am till 3pm, as this is when they will produce the majority of their power. If they are eastern facing panels, then this changes to 7.30am to 1.30pm and for western facing panels, 11.30am to 5.30pm.
Shading from objects like flue vents, trees and other structures should be avoided where possible. Careful design with a consultant and your install team can help with this. If this is not possible, then consider micro inverters or panel level optimisation, as this will reduce the impact of the shaded panels on the non shaded panels. Most larger inverters will have two maximum power point trackers (MPPTs), which means shaded panels on one tracker will not effect panels on the other. Also be mindful of future shading issues, as new structures may be built and trees often get bigger.
Other objects like power lines and antennas can cast a very thin and small shadow. While not ideal and to be avoided where possible, these will not have a drastic impact on your system. Panels should not be placed directly under antennas though, as birds are likely to perch on an antenna and leave excrement on the panels.
Yes, however it can be quite expensive if the correct provisions are not made.
An AC coupled or DC coupled system can be retrofitted to almost any solar power system currently installed. However, this is not very cost effective, as it requires extra components in addition to the batteries. There are many more cost effective ways to include batteries (now or in the future) to your system, so if you’re considering adding batteries down the track, we recommend discussing this with one of our renewable energy consultants. Different batteries will require specific components to integrate them into your system, and there is often more than one approach that will work. We can determine the most suitable option for you and provide you with a system that has, or has the capability to add, your desired battery solution.
Yes. The cost varies between states and energy providers. Households that already have a smart meter will be charged a fee to configure the meter to accommodate for solar. If you do not already have a smart meter, your retailer will need to install one for you. Most energy providers have these costs absorbed into your billing so you don’t pay a lump sum cost for your new meter.
AAPL provides a five year comprehensive warranty on the entire solar power system. This covers both parts and labour for all the components in your system. There are no extra costs associated with maintaining this warranty and while we recommend keeping an eye on the system performance, no scheduled maintenance is required.
The manufacturers also provide a warranty with their products. The panels all have a performance warranty (commonly 25 years) and a product warranty (usually 5-12 years). The product warranty covers any defects of the panel that doesn’t impact the performance. After the product warranty, any defects must impact performance before you’re eligible for repairs or replacement. Note that the panel warranty typically does not cover the labour costs involved in replacing the panels, although we will do this in the first five years as apart of their comprehensive warranty. Inverters typically have a five year product and labour warranty, however some will have longer warranties or offer them for an additional fee.
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Thank you very much Nick and Mandy. I would certainly recommend your company to any of my friends. You were very nice to deal with.
Elizabeth Salvaris | October 2012