The Varistor 300 LPD FPC Pressurized Solar Water Heater is a flat plate collector system rated to 8 bar, built for homes with a booster pump and sized for a family of 6 to 8. It runs three collectors into a glass-coated galvanised iron tank at 3mm, handles water hardness up to 600 ppm, and carries a 5-year warranty on tank and panels.
Pressurized for booster-pump homes. If there is a booster pump on your terrace, this is the kind of heater you need. Rated to 8 bar, it holds up against the pressure a booster pump delivers and supplies hot water at the same pressure as the rest of your plumbing, so showers stay strong across a large home with several bathrooms drawing at once. A gravity-fed heater underperforms in a pressurized home, so matching the heater to your setup is the first thing to get right.
A thick tank. The inner tank is galvanised iron with a glass coating at 3.0mm noticeably thicker than most tanks at this capacity, which typically run 1.6 to 2mm. Tank thickness and coating together determine how long a heater survives your water. 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, sized for a large family. Three flat plate collectors absorb sunlight across their full surface and heat water directly into the 300 litre tank, serving 6 to 8 people. Flat plate is 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. 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. Our gravity-fed Varistor ETC 300 handles 2000 ppm at a 10-year warranty; if your water is hard and your building runs on gravity, that is the better buy. Where hard water and a booster pump combine, tell our team and we will find you a pressurized model with a higher hardness rating rather than sell you a tank your water will destroy.
Before you order: your terrace needs at least 9 feet by 10 feet of clear, unshaded space three flat plate collectors take a large footprint. Confirm you have a booster pump; if your system runs on gravity, the ETC model is the correct choice. An electrical backup coil is available separately for cloudy stretches.
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, and Varistor is our own brand we set the specification, we stock it, and we stand behind it directly. Our team confirms whether 300 LPD suits your family, 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, V-Guard, Sudarshan Saur and Racold on our platform we will tell you honestly which suits your water and budget, including when a branded unit is the better choice. Check the current solar water heater 300 ltr price and talk to our team for the installation timeline in your city.
