Unique keyword rich content for a new website

I am looking for someone to write product descriptions for my solar products. I want those descriptions to be unique and keyword rich since I will not be using meta keywords. I have basic descriptions(about 100 words) written for them already but I am looking for someone who can write them better so that it also helps my SEO. I have a list of keywords I want to target and would thus like my descriptions to include these in a manner that is understandable and also helps conversions. Currently, I require descriptions for 10 products, 1 About page and a few FAQs. For all the products, I will be also requiring short descriptions so that they can be used in meta descriptions as well. If the person can also write Terms and Conditions, that would be great. Please find the products on [login to view URL]