The Sudarshan Saur 500 LPD ETC Solar Water Heater is a large-capacity evacuated tube system with a glass-lined-coated tank, sized for 10 to 15 people, carrying a 10-year tank guarantee the longest in its class. It uses 32 tubes to heat a 500 litre tank. It is a gravity-fed, non-pressurized system.
Capacity for a large household or establishment. At 500 litres, this serves a joint family, a PG, a hostel, a small guest house, or any setting where 10 to 15 people need hot water in the same morning window. Thirty-two evacuated tubes feed the tank, and this is the largest capacity in Sudarshan's glass-lined gravity-fed range.
The 20-year guarantee is the headline, and it matters more at this size. Most solar water heaters cover the tank for 5 to 10 years; a few reach 15. Twenty years is the longest guarantee available, and it counts for more on a 500 litre system, because replacing a large tank means dismantling a 32-tube array off a roof an expensive, disruptive job you want to avoid for as long as possible. The inner tank is glass-lined-coated at 2.5 mm, thicker than most glass-lined tanks in this class, putting a robust barrier between your water and the metal. Buying a tank this size once, and having it last two decades, is the economic case for this unit.
Built for hard water. On borewell supply, where mineral-heavy water destroys an ordinary tank in three to four years, the glass-lined coating is what lets this unit carry a 20-year guarantee where a plain tank would fail early and on a large-capacity system, tank durability is the single most important spec, because the replacement cost is highest.
Evacuated tube heating. The 32 tubes each hold a vacuum layer that traps heat like a thermos, so an evacuated tube solar water heater 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 matters.
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. Send our team a photo of your terrace and we will confirm before you spend anything.
The price includes transportation to your house, lifting to the terrace, and installation. You arrange the plumbing connection. At 500 LPD this is a large installation, so terrace access and space are real considerations our team confirms upfront.
SolarClue is India's managed solar marketplace. 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, and we handle Sudarshan Saur guarantee support afterwards. Compare the Sudarshan Saur 500 LPD against Supreme and other large-capacity heaters on our platform, and check the current solar water heater 500 ltr price. Talk to our team for the installation timeline in your city.
