SanTan Solar appears to be a legitimate company offering a variety of solar panels, both new and used. Customers have reported satisfaction with the company's products and customer service. Some customers have even installed SanTan Solar panels on their RVs and have been using them for over six months with positive results. However, as with any purchase, it's recommended to do thorough research and read reviews before making a decision. It's also important to read the fine print, especially when considering used panels. Some panels may not have manufacturer labels anymore, which could affect their eligibility for grid tie. Overall, the feedback on SanTan Solar is mostly positive, but it's always best to proceed with caution when dealing with any company.