I thought my seven-year-old solar panels were causing a leak into my attic. The company I'd used was no longer in service, so I contacted Advanced Solar. Even though they don't normally service the model we had, the supervisor, sent a technician out immediately to check and caulk the fittings.Turned out, I had a roof leak under the panels so they would have to be removed and replaced to fix the roof. Advanced Solar gave me an estimate to upgrade the system. Due to an extremely rainy month, it took a number of service calls to complete the job but each technician who came here was extremely professional and knowledgeable. Very pleased with the work performed.