2014BS EN 61427-1:2013 Secondary cells and batteries for renewable energy storage. General requirements and methods of test. Photovoltaic off-grid application
2006BS EN 61427:2005 Secondary cells and batteries for photovoltaic energy systems (PVES) — General requirements and methods of test
2002BS EN 61427:2002 Secondary cells and batteries for solar photovoltaic energy systems - General requirements and methods of test