Sunrise Solar Pvt. Ltd. Offers Domestic Solar Water Heaters with Black Chrome Coating. Sunrise Solar Pvt. Ltd. Is an ISO 9001:2000 and ISO 14001 awarded company. The Domestic Solar Water Heaters with Black Chrome Coating has unique proprietary aluminum Retainer of 1.6 mm thickness. It has Transmissivity of 88.8% at near normal incidence. The storage tand insulation is done with 75 mm thick Resin bonded Rock wool with density 1.05 g/cm3.