Hristov, Nikolay, Maik Jurgen Streblau, and Tatyana Dimova. 2021. “Online System for Monitoring and Analysis of the Operation of a Small Photovoltaic Plant”. ANNUAL JOURNAL OF TECHNICAL UNIVERSITY OF VARNA, BULGARIA 5 (1):76-85. https://doi.org/10.29114/ajtuv.vol5.iss1.228.