More of a PV than PW question – I have pole-mounted PV arrays with 1 axis that I can crank to change the angle, and have been using the website suncalc.org monthly to determine what that angle should be for optimal production. However, there is also a formula commonly shown on other sites (latitude * 0.92 - 24.3 [for summer]) that gives a very different angle. Anyone have a reliable resource for determining the best angle throughout the year for a non-major city?