100 LPD ETC GLC Varistor Solar Water Heater: 10 years warranty

The Varistor 100 LPD ETC GLC Solar Water Heater is an evacuated tube system with a glass-lined-coated tank, sized for a family of 2 to 3, carrying a 10-year tank warranty. It uses 8 tubes (2100mm each) to heat a 100 litre tank rated to handle water hardness up to 2000 ppm. It is a gravity-fed, non-pressurized system.

Built for hard water the 2000 ppm rating. The number that decides this purchase is 2000 ppm. The inner tank is galvanised iron with a glass-lined coating (GLC) at 1.6mm, and that coating is a barrier between your water and the metal. On borewell supply, where mineral-heavy water corrodes an ordinary tank in three to four years, the 2000 ppm rating is what lets this unit carry a 10-year tank warranty. If you are choosing a solar water heater for the hard water common across Bangalore and Hyderabad, this hardness rating is the specification that matters most.

Evacuated tube heating. The 8 evacuated tubes, each 2100mm long, hold a vacuum layer that traps heat like a thermos, so the system keeps producing on cold winter mornings and overcast monsoon days when a flat plate system slows. For a small family bathing early, that keeps hot water available.

Compact footprint. This unit needs only 8 feet by 3 feet of terrace space among the smallest in its class, suiting a compact or shared rooftop.

Two things to confirm before ordering. Your overhead tank or Sintex must sit at least 6 feet above terrace level, because this system runs on gravity. And if you have a booster pump on your terrace, this product is not for you — you need a pressurized model instead. Send our team a photo of your terrace and we will confirm before you spend anything.

On sizing, 100 litres serves 2 to 3 people. If you are 4 or 5, step up to 200 LPD.

The price includes transportation to your house, lifting to the terrace, and installation. You arrange the plumbing connection.

SolarClue is India's managed solar marketplace. Our team confirms whether 100 LPD suits your family, whether your water hardness suits this tank, and whether your terrace and tank height work for a gravity-fed system, before you pay anything. You book with a token payment rather than the full amount upfront. Delivery, terrace lifting and installation are coordinated by us through verified partners, and we handle warranty support afterwards. Check the current solar water heater price on our platform and talk to our team for the installation timeline in your city.