Design characteristics of a transparent honeycomb insulation device are presented and the performance of some transparently insulated solar thermal systems using water and ground (concrete/sand) as storage media is investigated for energy conservation applications. Simulation results of honeycomb solar ponds predict solar collection efficiencies of up to 40-60% at temperatures of 70-90-degrees-C. Field experiences with water storage cubes and cuboid using the transparent insulation on the surface and peripheries suggest that incorporating the transparent insulation on the central open cut would provide the benefits of added solar gain and thermal storage. The use of ground (sand/concrete) as the solar collector-storage media in the above application enables heat (DELTAT = 50-degrees-C) to be collected at a solar conversion efficiency of about 40%.