RUDHRA SOLAR
The warmth of tradition.Engineered by the sun.
From fire-heated copper vessels in village homes to modern solar technology in today's houses, the way we enjoy warm water has evolved. The comfort remains the same.
A traditional fire-heated copper vessel in a village courtyard on the left, and a Rudhra Solar flat plate collector water heater on a modern rooftop on the right.
SOLAR WATER HEATERS
Modern technology.A warmer, cleaner tomorrow.
Still warmed in copper. Now by the sun.
For generations, Indian homes warmed bathing water in copper vessels over a fire. In a Rudhra Solar Flat Plate Collector (FPC), your water is still heated in copper: it flows through copper header and riser tubes, and the sun takes the place of the fire. The fins that gather the heat may be copper or aluminium; the water itself is heated inside the copper tubes.
Heated water is stored in an insulated tank for domestic, commercial and institutional hot-water applications.
Renewable Energy
Uses sunlight to heat water, reducing dependence on electricity or fuel.
Heated in Copper
Your water is heated inside copper tubes, as it once was in copper vessels.
Everyday Comfort
Hot water for bathing, cleaning and daily needs.
Choose the right system for your need
Select a category to explore models and specifications.
Non-Pressurised FPC Systems
A simple and reliable solution for homes with overhead tanks.
- Works with overhead storage tanks
- Thermosiphon (no pump)
- Insulated storage tank
- Suitable for residential use
- Available in 100 to 500 LPD
- Capacity
- 100 LPD
- System type
- Non-pressurised
- Circulation
- Thermosiphon (no pump)
- Collector type
- Flat plate collector (FPC)
- Number of collectors
- 1
- Collector size (L × B × H)
- 2030 × 1020 × 100 mm, 45 kg dry
- Area per collector
- Gross 2.132 m², absorber 2 m²
- Total absorber area
- 2 m²
- Absorber
- Aluminium–copper or copper–copper, black chrome selective coating
- Optical properties
- Absorptivity 0.96, emissivity 0.12
- Header and risers
- Copper: Ø 25 mm header, Ø 12.5 mm risers, 9 fins
- Glazing
- 4 mm toughened glass, transmissivity above 0.85, EPDM sealed
- Collector box
- Aluminium, rockwool insulated (50 mm back, 25 mm sides)
- Tank
- MS, SS 304 or SS 316; PUF 50 mm insulation
- Cladding and backup
- Aluminium or powder-coated cladding; backup electric heater available
- Operating pressure
- 1 bar
- Mounting and connections
- Powder-coated MS or galvanised (GI) structure; ¾-inch inlet/outlet
- Installation
- By the Rudhra team
- Service
- Annual maintenance contract (AMC) available
- Typical hot-water temperature
- 60–65 °C on a sunny day
- Warranty
- 2 years
System
Collector
Storage tank
Installation & service
Performance & warranty
Specification source: Rudhra Solar flat plate collector technical specification and Rudhra Industries product data, October 2026.
FLAT PLATE COLLECTOR
Sunlight in. Hot water out.
Sunlight passes through toughened glass onto a black chrome-coated absorber. Its fins pass the heat to the copper riser tubes, where your water is heated, and rockwool insulation in an aluminium box keeps the heat in.
EXPLODED VIEW
CROSS-SECTION
- 1
Collect
Sunlight falls on the collector's dark absorber plate and heats it.
- 2
Transfer
Water in the collector's tubes carries that heat away from the plate.
- 3
Store
The heated water moves into an insulated storage tank.
- 4
Top up
On cloudy days a backup heater or heat pump makes up the difference.
SIZE YOUR SYSTEM
Find the right capacity for your site
Choose your application and daily hot-water use. We suggest the smallest model that covers it; an engineer confirms the final sizing.
Your suggested model appears here.
Estimate savings with your own tariffREAL INSTALLATIONS
Installed across homes and businesses
Rudhra Solar water heaters on residential and commercial rooftops.
BROCHURES & ENQUIRY
Ready to explore solar hot water for your project?
Request a callback from our team, or ask us for the product brochure.
Product brochure
Product range, specifications and applications. Pending: request a copy with a callback.
Your request includes the model you selected (RSFPC-100). Only your full name and mobile number are needed.
