There are different ways to get your solar panels. Which way to go greatly depends on how much money and time you have. You can simply buy solar panels with delivery and installation. There are also kits available that you have to install yourself. The cheapest solution is definitely to get all required parts separately and to build your own solar panels.
If you can afford to buy solar panels, getting a quote from a solar power company is definitely worth it. If you think you can’t afford it, check first. If you choose the right supplier, you can expect high quality products and service, and you get warranties that won’t come with DIY solutions. For Australian residents I personally recommend Energy Matters, who provide everything from solar panel kits to complete energy systems. When deciding for a solar energy system also get information about possible government rebates. Energy Matters can also help you with personalised information about rebates when you buy solar panels.
If you prefer getting a cheap system, you might not want to buy solar panels. Instead of purchasing complete systems you could use DIY instructions that are easy to follow and still result in products that can compete with bought ones. For example Earth 4 Energy explains all required steps in detail. Also for solar thermal solutions you can get great DIY instructions (e.g. Solar Stirling Plant).
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