There is an extra layer at the back of the panels which reflects the unabsorbed sunlight back again towards the solar cells for further more absorption in the sunlight. Sudarshan Saur is actually a designer and company of solar water heater. Established in 1989. Sudarshan Saur is among the 1st https://randomsingapore.com/solar-panel-maintenance-in-singapore-best-practices-for-longevity/