The Supreme Heavy Plus 400 LPD ETC Solar Water Heater is a large-capacity evacuated tube system with a porcelain-enamel-coated GI tank, carrying a 20-year tank warranty. It uses 34 tubes to heat a 400 litre tank rated to handle water hardness up to 2000 ppm. It is a gravity-fed, non-pressurized system.
A 20-year warranty, and the construction behind it. Most solar water heaters guarantee the tank for 5 to 10 years; a few reach 15. Twenty years on a large-capacity system matters more than on a domestic unit, because replacing a corroded 400 litre tank means dismantling a 34-tube array off a roof an expensive, disruptive job. The inner tank is 1.6mm galvanised iron finished with porcelain enamel, which is glass fused to the metal at high temperature rather than a coating applied on top. That fusion is why it bonds permanently and resists the scaling that destroys ordinary tanks. The outer shell is powder-coated steel or stainless.
Built for hard water. On borewell supply, where mineral-heavy water destroys an ordinary tank in three to four years, the porcelain enamel surface and 2000 ppm rating are what let this unit carry a 20-year guarantee. Across the water heaters we stock, only Sudarshan Saur's glass-lined range and our own Varistor ETC match this rating most V-Guard and Racold models handle 600 to 1000 ppm.
Capacity for a large household or establishment. At 400 litres this serves a joint family, a PG, or a guest house where many people need hot water in the same morning window. Thirty-four evacuated tubes feed the tank, each holding 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.
Two things to confirm before ordering. Your overhead tank or Sintex must sit high enough above the terrace for gravity feed. And if you have a booster pump on your terrace, this product is not for you — you need a pressurized model instead. If your overhead tank sits lower than required, ask our team about Supreme's Sleeper models, which need only 1 foot of height.
The price includes transportation to your house, lifting to the terrace, and installation. You arrange the plumbing and electrical wiring.
SolarClue is India's managed solar marketplace. Our team confirms whether 400 LPD suits your household or establishment, tests your water hardness against this tank, and checks your terrace and tank height 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 Supreme warranty support afterwards. Compare the Supreme against Sudarshan Saur, V-Guard and other large-capacity heaters on our platform, and check the current solar water heater price. Talk to our team for the installation timeline in your city.
