Larger solar panels are not necessarily a good option. The quality of each panel is affected by many factors, like wattage and warranty. Consider everything when making a hefty purchase like this.
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Do your best to reduce your energy consumption before investing in solar energy. Your solar energy system will be more affordable if you can live with a reasonable quantity of energy. Start by improving your insulation, make an effort to turn off appliances and replace old appliances with energy-efficient ones.
Ask your solar panel vendor about the certifications they have and about the testing of the panels you are interested in. You might qualified for some rebates offered by the government if you go through a certified vendor and choose panels that have received certifications too. Besides, this is a good way to make sure you are getting a quality product.