SOLAR SELF ASSESSMENT
Self-assessment helps you Getting solar done right at first place.
Let’s get started…
There are three Main factors important to have self-assessment done right.
- Your energy consumption & behavior
- Good area for proposed Installation
- How much you are prepared to spend.
Understand your energy consumption
Well, your energy statements are the perfect tool to study your energy consumption and behaviors
We need to look for the following
- Average Daily consumption
- $/kwh rate peak
- Off peak rates and usage
- Rough estimate on time of usage.
As a home owner, ‘self-consumption’ would be the biggest benefit you have going solar. If your state has a feed-in tariff and you wish to take advantage of this for the financial return, you also need to maximize your annual production by tilting your system
Do you have enough space for solar?
Solar Modules can be installed on roof with a mounting frame, on the ground with Ground mount, on a wall or integrated into the building fabric.
The fixing of a solar array mounting system on a tiled roof. Tile hooks are installed by attaching a bracket to the rafter. They stick out from underneath a tile and provide a strong mounting point for the rail, the long bar to which the solar modules are mounted. The vast majority of PV systems installed in Australia between 2000 and 2011 were less than 100kWp. Most systems were installed for the domestic market and were therefore rooftop installations. A very small percentage of installations were mounted on the ground and an even smaller number were integrated into the building fabric.
is north is the best side installing solar panels?
If you are looking to reduce the impact of time-of-use metering and avoid this additional energy cost, then facing your array NNW and having a greater tilt angle for the array could offset peak energy use. If you want a stand-alone system, your performance expectations include a fairly consistent energy supply: a greater tilt angle would increase winter energy output at the expense of the energy generated in summer.
Lets see How this work?
The angles, altitude and azimuth, which specify the position of the sun in the sky. Orientation (azimuth) Solar modules produce most power when they are pointed directly at the sun. They should be installed so that they receive maximum sunlight. As a general rule of thumb for the southern hemisphere, install the solar modules to face north (towards the equator) to produce the most energy across the year. If the particular installation requires loads during either summer or winter to receive maximum solar contribution (peak loads), the orientation of the array can be changed.
Tilt angle (angle of elevation or plane inclination or altitude) Generally for grid connected systems the tilt angle should be within 10° of the site’s latitude, to maximize the amount of energy produced annually. For example, in Sydney, at latitude 34° south, an acceptable installation tilt would be 24° from the horizontal. As most roof pitches are 20–22°, installing the modules flat onto the roof is acceptable for all of Sydney. For a stand-alone PV system , where usually winter operation is crucial (i.e. needing to get maximum charge into the batteries when available sunlight hours are minimal), the tilt angle should be the site’s latitude plus 15°.
Array frames Solar array frames are tilted so that modules face the sun. In Australia, modules are installed to face north. In tropical areas this means the sun is south of the array for part of the summer but this does not greatly affect output (see ‘Siting’ above). Array frames can be fixed, adjustable or tracking. The system designer selects the right frame for your system./p>
Fixed frames are set at the optimum tilt angle for the system, which depends on the location, type of load and available solar input (see ‘Siting’ above). For stand-alone systems, as a rule of thumb, if the main loads are in the winter months when the solar resource is reduced, make the array’s tilt angle more vertical (approximately latitude plus 15°) to maximise exposure to the low winter sun. If the installation has major cooling and refrigeration loads, reduce the tilt angle (approximately latitude minus 10°) to maximise output during summer when those loads are greater for longer. For grid connected systems, use the site’s latitude angle to maximise the annual output of modules; +/- 10° is still acceptable and within the range of the typical roof pitch.
Face solar modules due north. Sydney’s angle of latitude is 34o. Adjustable frames allow the tilt angle to be varied manually to maximise output throughout the year. This type of framing is used for stand-alone systems where the installation is usually on the ground. Unless there is some guarantee that the tilt angle will be regularly varied for the life of the system (rather than the first few years of operation while the owner is still motivated), it is best to fix the array at the optimum angle. Tracking array frames follow the sun’s path across the sky throughout the day and year. They are controlled either by an electric motor or a refrigerant gas in the frame that uses the heat of the sun to move the gas around the tracker’s frame as it follows the sun. Trackers are more expensive than fixed array frames but by following the sun they provide more energy throughout the day. They are most beneficial at higher latitudes where the available solar energy is lower. Tracking arrays, being mechanical devices, require maintenance and this may reduce system reliability. The outputs of crystalline modules are affected by temperature: as the temperature increases, the output decreases. Thin film solar modules are less affected. To keep crystalline modules cool, they should be well ventilated, with a gap of at least 50mm behind them to allow airflow.
Avoid corrosion. If the array frame and module frame are made from galvanically different metals (in contact with each other, the two metallic components will corrode), they must be separated by an isolating material to prevent electrochemical corrosion. This also applies when installing the modules and mounting structure on a metal roof. Array frames must be designed so that their installation meets Australian wind loading standards under AS/NZS1170.2:2011, Structural design actions — wind actions. Check the ability of any roof structure to withstand the structural wind loading arising from the PV installation for that specific location and if necessary have the installation redesigned. Check how to find a good solar installer here.
Roof integration Rooftop systems can be either partially or fully integrated. In full integration the elements must also fulfil the usual functions such as strength, watertightness and drainage. The installation must be carefully planned and the appropriate products and services confirmed. Some partially integrated systems use special mounting structures to hold the modules but require an additional waterproof membrane under the solar component. Solar tiles or shingles are designed to replace conventional tiles or roofing. They allow easy access to the rear of the tiles for ventilation and maintenance. The roof space must be ventilated to keep the tiles cool. The pitch of roofs is often close to the optimum PV module tilt angle. For example, the optimum tilt angle for a grid connected system in Sydney is about 34° (Sydney’s latitude) and with the acceptable margin of 10° variance from optimum, 24° is very close to the most common roof pitch. PV roofing elements need to be compatible with any other roofing elements for structural and aesthetic reasons. Shading elements such as BIPV awnings reduce cooling loads at the same time as generating electricity. They are also usually quite accessible for cleaning purposes. Semi-transparent PV modules can replace glass skylights and glass roofing in many situations. The dappled light quality can be used effectively by skilled designers.
Now Hope we have captured some perfact spot for our solar PV installation.
Now Let's see what is the best way funding Solar?
Majority of customers think this way, but Honestly there are lots of options available and always different personalities choose different ways. Each funding/financing options offers their own advantages. We have highlighted some of the best methods of financing solar.
- Funding Solar power system with CASH, this is the most common method used to fund solar pv project in australia. This approach is always most benificial and simple. You will be owner of your own energy generation unit(solar) from Day 1 and you own all energy generated by your solar panels. Not every one has this options on hand to pay the system outright, many customers also look for second finance option
- Funding Solar power system with 0% or Low interest solar finance. This type of funding sourced from bank or other financial institutes to pay for your solar power system including parts and installation. you will then pay monthly installements to your bank or financial institute for the agreed term to pay it off. Lots of our installers also design your system in a such a way where customers able to manage monthly payment lesser than what they save from solar pv, thus you enjoy rewards having solar. AS customers will be borrowing money for solar installation, the upfront cost is minimal which also makes this method of funding very poppuler now a days.
- Funding Solar power system with a solar lease, this is method allows customers to "rent" solar power system, Customers upfront cost is nil to small token and then customers need to pay for the energy generated- used. With solar lease, thierd pary (usually Funder)will manage commissioning and maintanance of solar power system, in other words they takes all hassels away from you and you enjoy clean energy at a cheaper rates.many solar leases have longer tearms and also attracts purchase options.
Which Funding option is best for you? all options offer immidiate as well as long term savings allowing you reducing carbon foot print. The option you choose totally depends on your financial planning and budget. If you need help deciding the perfect way funding your solar project, you can contact us by simply filling our quote form.