The Varistor 500 LPD ETC Solar Water Heater is a large-capacity evacuated tube system with a glass-coated tank, sized for 10 to 15 people, carrying a 10-year tank warranty. It uses 32 tubes (2100mm each) to heat a 500 litre tank rated to handle water hardness up to 2000 ppm. It is a gravity-fed, non-pressurized system.
Capacity for a joint family or establishment. At 500 litres this serves a joint family, a PG, a hostel, or a guest house where 10 to 15 people need hot water in the same morning window. Thirty-two evacuated tubes feed the tank.
Built for hard water and at this size it matters most. The 2000 ppm rating is what separates this from most large-capacity heaters, which typically handle 600 to 1000 ppm. On borewell supply, where mineral-heavy water corrodes an ordinary tank in three to four years, that rating supports the 10-year warranty. On a 500 litre system the stakes are higher than on a domestic unit: replacing a corroded tank means dismantling a 32-tube array off a roof, which is an expensive, disruptive job. Getting the tank matched to your water the first time is the single most important decision in this purchase.
Evacuated tube heating. Each of the 32 tubes holds 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 an establishment where many people bathe in the same window, that consistency is what keeps hot water available rather than running out halfway through.
Which 500 LPD do you need? We make two at this capacity. This ETC GLC model is gravity-fed and rated to 2000 ppm the choice for hard water and buildings running on an overhead tank. Our pressurized 500 LPD uses a stainless steel tank and suits buildings with a booster pump serving multiple bathrooms at once. Tell our team whether your building runs on gravity or pressure, and how hard your water is, and we will point you to the right one.
Two things to confirm before ordering. Your overhead tank or Sintex must sit at least 6 feet above terrace level, because this runs on gravity. And if you have a booster pump on your terrace, this product is not for you the pressurized 500 LPD is the correct choice. Send our team a photo and measurements of your terrace and we will confirm before you spend anything.
Before you order: your terrace needs at least 8 feet by 9 feet of clear, unshaded space. The price includes transportation, lifting to the terrace, and installation. You arrange the plumbing connection.
SolarClue is India's managed solar marketplace, and Varistor is our own brand we set the specification, we stock it, and we stand behind it directly. Our team confirms whether 500 LPD suits your household or establishment, 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. Compare the Varistor against Supreme, Sudarshan Saur and other large-capacity heaters on our platform we will tell you honestly which suits your water and budget. Check the current solar water heater 500 ltr price and talk to our team for the installation timeline in your city.
