Try getting recommendations for solar energy home equipment. If you have loved ones or colleagues that have solar energy at home, ask them to provide details of their experience or any issues they've been through with their system. It's important to consider other opinions on what you should or should not do.
While it may seem that your solar panels are always affixed to your roof permanently, the best ones permit repositioning of the angles. Fixed angle panels are just not that efficient.
If you know that you cannot reach your solar panels to clean them, the best thing to do would be to hire a professional to clean it for you. if you are not sure of who to call, you should ask the company that came and installed the panels for you.
Do not let a salesperson pressure you into purchasing solar panels. A solar energy system is an important investment and you should take the time to compare your different options. If a vendor feels the need to pressure you, they might not be confident about the quality of their products.