This is a scam you can't call the number back. When the message first starts it sounds like a live person. They are asking questions that you would typically say yes to such as am I speaking too and your name. Are you the homeowner? They give you several opportunities to say yes. The scam to get a recording of people saying yes is what this is probably. They can use that recording then to invoice you or get into banking information and credit card information sometimes. It took a minute for me to realize this was actually a recording it's very well done and they go forward talking about solar panels being absolutely free and never have an electric bill again and then they hang up on you. It is just an attempt to get them to say yes. And you cannot call the number back you just get a real fast busy signal