The Varistor 500 LPD FPC Pressurized Solar Water Heater is a large-capacity flat plate collector system rated to 8 bar, built for buildings with a booster pump and sized for 10 to 15 people. It runs three collectors into a glass-coated galvanised iron tank at 3.5mm, handles water hardness up to 600 ppm, and carries a 5-year warranty on tank and panels.
Pressurized for booster-pump buildings. At 500 litres serving 10 to 15 people a joint family, a PG, a hostel, or a guest house this is the pressurized large-capacity option. Rated to 8 bar, it holds up against the pressure a booster pump delivers and supplies hot water at the same pressure throughout the building's plumbing, so showers stay strong across multiple bathrooms drawing at once. That simultaneous-demand performance is exactly what a gravity-fed system struggles with at this scale.
A thick tank at 3.5mm. The inner tank is galvanised iron with a glass coating at 3.5mm thicker than the 3.0mm used on the smaller Varistor FPC units, and considerably heavier than the 1.6 to 2mm typical of the market. On a 500 litre installation, where replacement means dismantling a three-panel array off a roof, tank substance is what protects you from that job. That is the advantage of a house brand: the specification is set by what lasts rather than by what a distributor's margin permits.
Flat plate technology at scale. Three flat plate collectors absorb sunlight across their full surface and heat water directly into the tank the proven, low-maintenance technology, reliable in strong direct sun, warming more slowly than an evacuated tube system on cold mornings and heavy overcast.
An honest point on hard water at this size. The 600 ppm rating suits soft to moderately hard supply. If your borewell water runs harder as much of Bangalore and Hyderabad does this tank will scale and corrode before its time, and on a 500 litre three-panel system that failure is expensive to put right. Where hard water and a booster pump combine, tell our team: our gravity-fed Varistor ETC 500 handles 2000 ppm at a 10-year warranty, and we can look at pressurized options with higher hardness ratings from other brands. We would rather route you correctly than sell you a tank your water will destroy in year three.
Before you order: your terrace needs at least 9 feet by 14 feet of clear, unshaded space three flat plate collectors take a very large footprint, so measure carefully. Confirm you have a booster pump; if your building runs on gravity, the ETC 500 is the correct choice. An electrical backup coil is available separately.
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 pressure setup matches this model, 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. Check the current solar water heater 500 ltr price and talk to our team for the installation timeline in your city.
