When looking for a solar panel system, try to find discounts. So while theses initial costs are intimidating, know that there is help available. Verify whether state or federal rebates and grants are available to assist you. This reduces the costs greatly. You can even get some deductions at tax time.
Carefully consider the types of solar panels you plan on having installed. Long ago, if you didn't have enough roof space, you'd need very expensive high efficiency mono-crystalline panels. There are now more advanced polycrystalline panels and even thin film panels. If you've got enough roof space, you might wish to look at the size of the panels in relation to their output capacity to avoid having insufficient panels that you need more of later.
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Before installing any form of solar panels, be familiar with local rules and regulations. There are lots of places where some permits are required. The last thing you want is to have the system put it and then you are forced to remove it later.