wifi problem

2 weeks ago, I began having Wi-Fi problems. It started 2 Thursdays ago and everyday since then my Wi-Fi goes out at 11am and doesn't come back on until 4pm. I've had a technician come out 3 times and troubleshoot and they say everything is perfect on their end, they've given me 3 new routers and checked everything that could have a problem. After 3 new routers and looking at everything, I am still having the same problem. The Technicians think its a power problem where there's not enough power, I checked to see how much power I am getting when the Wi-Fi stopped working and I got what I should be getting which is around 120 Volts. I even had an electrician come out and check and he said it wasn't a power issue. Has anyone ever had this problem before? How did it get fixed?

This has nothing to do with the product. I have no where else to go and need help. 

Thank you in advance.