EMMVEE Solar Systems Pvt. Ltd., since 2007 a JV with SolarCAP A/S Denmark, has grown to be the largest manufacturer of Solar Water Heating Systems in India and probably in Asia. EMMVEE's latest 120.000 sq. ft. state-of-the-art production is in operation since June 2009 on a 21 acre plot at Dobaspet, near Bengaluru.

EMMVEE Solar Water Heating Plant

Flat Plate Collector

EMMVEE has a semi-automated production centre for manufacturing solar collectors. A online quality monitoring process at each stage of the production ensures the highest quality of the collector.
The production process can be listed as follow:

• Brazing the fins with header tubes
• Leak and pressure test on fin assembly
• Assembly of fin assembly with aluminium box
• Rock wool insertion at bottom and sides of the box
• Back sheet assembly and assembly of glass with EPDM rubber

Tank (boiler)

The in-house manufacturing of the tanks is done using sophisticated machineries like auto controlled hydraulic press, auto linear and circumferential welding machineries along with online quality procedures. Each tank is subjected to leak test and pressure test before it proceeds to the enamel coating section.

Enamel coating

The tanks which pass the quality tests are then subjected to enamel coating. Here, the tank's inner surface is chemically washed and rinsed with water through a 7 stage process; the tank is then dried using hot air. Once the inside of the tank thoroughly dries, enamel is flooded inside the tank and it is rotated to achieve uniform coating thickness. A thin layer of enamel is also coated on the outer surface of the tank to prevent the corrosion. On completion of the flooding process, tank is again dried by using hot air and fired at 870°&C to ensure proper bonding of the enamel with base material. These tanks are further subjected to leak and pressure test after fixing the gasket, backup heater and anode.

Insulation

Enamel coated tanks are insulated with a high density insulation material to prevent heat loss. Uniform thickness of the insulation material is maintained by using auto controlled machines & fixtures.

Final quality inspection and documentation

Before packing these insulated tanks are subjected to a final quality inspection.