With the increase in the use of solar energy, both in civil and industrial environments, the problem of maintenance of photovoltaic panels becomes extremely important. In this work attention is restricted to the problem of cleaning and safety conditions of the photo-voltaic (PV) panels and a brief review of main effects determining their efficiency reduction are reported. The discussion related to problems and unsafe functioning conditions concludes this paper.
DeGraaff D, Lacerda R, Campeau Z. Degradation Mechanisms in Si Module Technologies Observed in the Field; Their Analysis and Statistics, Presentation at PV Module Reliability Workshop, NREL, Denver, Golden, USA, 2011. http://www1.eere.energy.gov/solar/pdfs/pvmrw2011_01_plen _degraaff.pdf
May M, Pillai R. Impact of dust on solar photovoltaic (PV) performance: Research status, challenges and recommendations. Renewable and Sustainable Energy Reviews 2010; 14(3): 124-3131. https://doi.org/10.1016/j.rser.2010.07.065
Griffith JS, Rathod NS, Paslaski J. 1981 Some tests of flat plate photovoltaic module cell temperatures in simulated field conditions. Proc. 15th IEEE Photovoltaic Specialists Conf., Kissimmee, FL, 1981: 822-30.
Report IEA-PVPS T13-01. 2014. Performance and Reliability of Photovoltaic Systems Subtask 3.2: Review of Failures of Photovoltaic Modules IEA PVPS Task 13 External final report IEA-PVPS March 2014