RENOLIT Ondex developed FIX O Bat and FIX O Ser overlays for easy installation of photovoltaic panels on PVC roofs and greenhouses. These lightweight panels preserve existing roofs, reducing costs and increasing solar panel efficiency. RENOLIT Ondex HR SOLAR panels limit roof temperatures, improving comfort for animals and people inside. The Bio2 range, in greenhouses since the 1980s, allows light for optimal plant growth. With resistance to fire, corrosion, impact and low temperatures.