If Jonathan Lockwood had to spring for a new roof, he was determined to find a versatile cover that could go beyond just keeping his 1981 townhome dry. He also wanted to slash his escalating electric bill.  Aware that greenlighting traditional rooftop solar panels would be a tough slog in his hyper-regulated planned community in Northern Virginia, he opted for a lower-profile product that integrates solar technology into nailable asphalt shingles.     Read the article………………………..