Thermal insulation of thermal solar container device

The typical solar flat plate collector relies on materials like rock wool for insulation to minimize heat loss. However, the use of such inorganic materials raises substantial concerns for both the industry and the envir. Do thermal solar collectors produce electricity?YouTube [pdf]
[FAQS about Thermal insulation of thermal solar container device]

Insulation resistance requirements for solar container systems

To pass International Electrotechnical Commission (IEC) standards for insulation resistance testing, PV systems with an open circuit voltage rating greater than 120 Vdc must have an insulation resistance greater than 1 MΩ. [pdf]