My uncle gift me a solar water heater. I used last 4 months it was nice. V-Guard is a old company. Storage tank made of aluminium . High quality oPUF insulation minimizes the heat loss of water inside the tank. It generates hot water without electricity. Huge saving on electricity.Efficient performance in summer and cloudy days. Its availiable in capacities -100, 125, 150, 200, 250, 300 LPD. V-Guard solar water heater comes in compact size, low height, light weight. These are inexpensive, safe, reliable and are esay to maintian. They are eco friendly and provide trouble free service for year.