1Hussein H M S, Ahmad G E, EI-Ghetany H H. Performance evaluation of photovoltaic modules at different tilt angles and orientations[J]. Energy Conversion and Management, 2004, 45(15- 16): 2441 -2452.
9Amit Kumar Yadav, S.S. Chandel. Tilt angle optimization to maximize incident solar radiation: A review[J]. Renewable and Sustainable Energy Reviews, 2013, 23 (23): 503- 513.