Littversions offers a unique replacement labels designed to adapt to all brands, different use case scenarios and load type devices such as Load Centers. Photovoltaic solar system warning and caution labels and stickers, meet the NEC Requirements and they are UV resistance. Photovoltaic Labels For Passing the Electrical Final inspection, Water & UV Resistant. The Label Sizes are Standardized to NEC Requirements, Service Equipment Labeling ,Safety labels for electrical equipment & facilities management.