... . Header centerline distance: 1500Number of panels: 12, 14, 16, 18, 20, 22Geomtrical radiation area: 20.40, ... 27m2 Header centerline distance: 1600Number of panels: 12, 14, 16, 18, 20, 22Geomtrical radiation area: 21.72, ... 25.34, 28.96, 32.58, 36.20, 39.82m2Effective ... 26Geomtrical radiation area: 31.68, 35.64, 39.60, 43.56, 47.52, 51.48m2Effective cooling ...