The Anu Solar 500 LPD ETC GLC Solar Water Heater is an evacuated tube system sized for 10 to 15 people, using 34 vacuum tubes to heat a 500 litre tank. The inner tank is galvanised iron with Anu's Crystal Blue glass-lined coating, rated to handle water hardness up to 2000 ppm, and carries a 10-year tank warranty. It is a gravity-fed, non-pressurized system.
At 500 litres this is not a small-family decision. It is the capacity for a joint family, a PG, a hostel, or a guest house where 10 to 15 people want hot water inside the same two-hour window. Thirty-four evacuated tubes feed the tank, and at that scale the technology choice matters more, not less, because a system that warms slowly on a cold morning leaves the last few people with nothing.
The number that decides this purchase is 2000 ppm. That is the water hardness this tank is rated for. The inner tank is galvanised iron finished with Anu's Crystal Blue glass line coating at 1.6 mm, a physical barrier between your water and the metal. A glass lined solar water heater is what you need on borewell supply, where mineral-heavy water quietly eats through an ordinary tank in three to four years. That coating is why this unit carries a 10-year tank warranty rather than the 5 years Anu's FPC range offers at the same capacity. If you are choosing a solar water heater for hard water at this size, where replacement means dismantling a 500 litre system off a roof, the tank rating is not a detail.
Each of the 34 tubes holds a vacuum layer that traps heat the way a thermos does. That is what makes an evacuated tube solar water heater keep producing on cold winter mornings and through overcast monsoon days, when a flat plate system slows down. For a household or establishment with people bathing from 6am onward, an ETC solar water heater is the technology that keeps up.
The tube design also suits a smaller footprint than you would expect at this capacity. This unit needs 8 feet by 9 feet of clear terrace space, considerably less than the four-panel FPC system at the same 500 litres. The outer tank is galvanised and powder coated to survive years of sun and rain.
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 the pressurized model instead. Send our team a photo of your terrace and we will confirm before you spend anything.
On sizing, 500 litres serves 10 to 15 people. If you are six to nine, the 300 LPD is the right size and the cheaper one. Buying more capacity than you use is money on your roof doing nothing.
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 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 Anu Solar warranty support afterwards. Check the current Anu Solar water heater price and solar water heater 500 ltr price on our platform, and talk to our team for the installation timeline in your city.
