Solar Thermal Systems
Hot water from the sun — up to 80% cheaper
India’s first MNRE-approved ETC manufacturer since 1999. Two technologies, four tank options, one name you can trust — Solar Hitech.
Up to 80% savings
Reduce your electricity bill for water heating every month
Power-cut proof
Hot water even during load shedding — no grid dependency
Zero emissions
Clean renewable energy with no carbon footprint
15-year lifespan
Long system life in areas with moderate water quality
Adds property value
Solar water heating increases your home or building’s value
Evacuated Tube Collector (ETC) Systems
Non-pressurised systems for homes, apartments, offices, hotels and industries. India’s first and most trusted ETC technology 94% sun tracking, vacuum insulation, no heat loss in cold weather.
The smarter choice for most Indian climates
Evacuated Tube Collectors use borosilicate glass tubes with vacuum insulation to trap solar heat with minimal loss. The result is reliable hot water even on overcast days — and at temperatures up to 80–90°C for industrial needs.
- 94% sun tracking from sunrise to sunset
- No heat loss in cold weather — vacuum insulation
- No scaling or corrosion — borosilicate glass tubes (ISO 3585)
- Absorptance >93%, Emittance <6% at 85°C
- 30% cheaper than other solar heating technologies
- Optional 2 kW / 3 kW / 5 kW backup heater
- PUF 50mm insulation, MS powder-coated support structures
Residential
Commercial
Industrial
Radian
Standard · PPGI outer tank
Colour-coated outer tank. Ideal for homes and apartments with standard water quality requirements.
Outer: PPGI colour-coated
Radian+
Premium · SS201 outer tank
Stainless steel outer casing for enhanced durability and a premium finish. Same tube specification.
Outer: SS201 stainless steel
Arc
Standard · PPGI outer tank
Longer 2100mm tubes for higher energy capture. Suited to smaller roof footprints needing more output.
Outer: PPGI colour-coated
Arc+
Premium · SS201 outer tank
Stainless outer casing with the efficiency advantage of 2100mm tubes. Best-in-class residential choice.
Outer: SS201 stainless steel
Choose your inner tank — matched to your water quality
India’s water quality varies widely across regions. All ETC systems are available in four inner tank variants — your Solar Hitech dealer will recommend the right one for your site.
Chrome
Inner SS304
For soft water and low–moderate TDS. Ideal where softeners or water conditioners are installed.
TDS range: 0–200 ppm
Warranty: 5 yrs (non-press.) · 2 yrs (press.)
Albus
Inner Galvanized Iron
For bore, river or municipal water with moderate hardness. Zinc coating prevents premature corrosion.
TDS range: 150–400 ppm
Warranty: 5 yrs (non-press.) · 2 yrs (press.)
Minerva
Inner Enamel Glass Lined
For hard water and high TDS sites. Chemical resistant, food grade, odour-free. Up to 150°C thermal resistance.
TDS range: up to 1000 ppm
Warranty: 10 yrs (non-press.) · 2 yrs (press.)
Mild Steel
Inner MS with Epoxy
Low-carbon steel with salt-water protective epoxy. Primarily used in pressurised applications.
TDS range: 150–400 ppm
Warranty: 2 yrs (pressurised)
Radian Range — 100 LPD to 500 LPD (58 × 1800mm tubes)
| Capacity | Tubes | Tube Size | Dimensions | Suitable For | Inner Tank |
|---|---|---|---|---|---|
| 100 LPD | 10 | 58 × 1800mm | 2m × 1m | 2–3 users | SS304 / GI / Glass Lined |
| 150 LPD | 15 | 58 × 1800mm | 2m × 1.4m | 3–4 users | SS304 / GI / Glass Lined |
| 200 LPD | 20 | 58 × 1800mm | 2m × 1.8m | 4–5 users | SS304 / GI / Glass Lined |
| 250 LPD | 25 | 58 × 1800mm | 2m × 2.5m | 5–6 users | SS304 / GI / Glass Lined |
| 300 LPD | 28 | 58 × 1800mm | 2m × 3m | 6–7 users | SS304 / GI / Glass Lined |
| 500 LPD | 44 | 58 × 1800mm | 2m × 4m | 12–13 users | SS304 / GI / Glass Lined |
Arc Range — 100 LPD to 500 LPD (58 × 2100mm tubes)
| Capacity | Tubes | Tube Size | Dimensions | Suitable For | Inner Tank |
|---|---|---|---|---|---|
| 100 LPD | 8 | 58 × 2100mm | 2m × 1m | 1–2 users | SS304 / GI / Glass Lined |
| 150 LPD | 12 | 58 × 2100mm | 2m × 1.2m | 2–3 users | SS304 / GI / Glass Lined |
| 200 LPD | 16 | 58 × 2100mm | 2m × 1.6m | 3–4 users | SS304 / GI / Glass Lined |
| 250 LPD | 20 | 58 × 2100mm | 2m × 2.4m | 4–5 users | SS304 / GI / Glass Lined |
| 300 LPD | 24 | 58 × 2100mm | 2m × 2.8m | 5–6 users | SS304 / GI / Glass Lined |
| 500 LPD | 32 | 58 × 2100mm | 2m × 3.2m | 10–12 users | SS304 / GI / Glass Lined |
Commercial ETC systems — 500 LPD to 5,000 LPD (with manifolds)
| CAPACITY | COLLECTORS | COLLECTOR AREA | OUTER DIA. | TOTAL HEIGHT | INSULATION |
|---|---|---|---|---|---|
| 500 LPD | 4 | 8.36 m² | 800mm | 1,510mm | PUF/50mm |
| 1,000 LPD | 8 | 16.72 m² | 1,100mm | 1,700mm | RW/100mm |
| 1,500 LPD | 12 | 25.08 m² | 1,400mm | 1,640mm | RW/100mm |
| 2,000 LPD | 16 | 33.44 m² | 1,550mm | 2,080mm | RW/100mm |
| 3,000 LPD | 24 | 50.16 m² | 1,550mm | 2,260mm | RW/100mm |
| 5,000 LPD | 40 | 83.6 m² | 1,550mm | 3,560mm | RW/100mm |
Available capacities: 500, 1000, 1500, 2000, 2500, 3000, 4000, 5000 LPD and above.
Manifolds in 500 LPD and 1000 LPD vertical and butterfly configurations.
Larger capacities available on request.
ETC or FPC — choosing the right technology
ETC Systems
Non-pressurised · 58mm tubes
Choose ETC if you need hot water for general use — bathing, washing, domestic hot water — without pressurised plumbing.
Best for:
Individual homes · Apartments · Hostels · Hotels · Factories
FPC Systems
Pressurised · up to 5 bar
Choose FPC if your plumbing is pressurised — Jacuzzis, showers with high pressure, or commercial/industrial sites with pressurised piping.
Best for:
Villas · Luxury hotels · Jacuzzis · Commercial establishments
System warranty guide
| Model | Inner SS304 tank | Inner GI / MS tank | Inner Glass Lined tank | Frames | Collectors |
|---|---|---|---|---|---|
| Radian, Arc (non-pressurised ETC) | 5 years | 5 years | 10 years | 1 year | 1 year |
| Verda (non-pressurised FPC) | 1 year | 1 year | 1 year | 1 year | 1 year |
| Turbo (pressurised FPC) | 1 year | 1 year | 1 year | 1 year | 1 year |
| Commercial systems (1000–5000 LPD) | 1 year | 1 year | 1 year | 1 year | 1 year |
Warranty covers the tank only. Tubes, rubber parts and accessories are excluded.
Refer to your warranty card for full conditions and exclusions.
Radian and Radian+ carry the same warranty coverage.
200+ dealers · 10 states · 200+ districts
Service requests responded to within 6–8 working hours. Replacement requests closed within 7 days. One of the fastest response times in the industry.
Annual and comprehensive maintenance contracts
For large commercial and industrial installations. Covers preventive maintenance, cleaning schedules, performance checks and fault response. Call us or enquire online.
Find the right system for your site
Not sure whether ETC or FPC is right for you, or which inner tank suits your water quality? Our team will help you choose.
Flat Plate Collector (FPC) Systems
Pressurised systems for Jacuzzis, showers, commercial and industrial applications. BIS approved. Built to withstand 5 bar working pressure — durable in rugged atmospheric conditions.
The preferred choice for pressurised applications
Flat Plate Collectors use electro-grade copper or aluminium absorbers with selective black chrome coating for maximum heat transfer. Toughened glass glazing and 50mm PUF insulation ensure performance and longevity across India’s varied climates.
- Peak sun tracking at noon — optimal for consistent output
- Toughened to withstand high thermal stress and weather impacts
- Absorptance >96%, Emittance <2% — highly efficient absorbers
- 4mm toughened glass glazing, powder-coated casing
- Up to 5 bar working pressure — pressurised showers and Jacuzzis
- Copper or aluminium absorber variants available
- BIS approved — every Solar Hitech FPC collector
Residential
Commercial
Industrial
Turbo
Standard · PPGI outer tank
Colour-coated outer tank. Pressurised FPC system for Jacuzzi, shower and commercial hot water applications. Up to 5 bar.
Outer: PPGI colour-coated
Turbo+
Premium · SS201 outer tank
Stainless outer casing with full pressurised capability. Premium choice for hotels, villas and upscale commercial properties.
Outer: SS201 stainless steel
Inner tank options — same four variants as ETC
All FPC systems share the same inner tank range as our ETC products — Chrome (SS304), Albus (GI), Minerva (Glass Lined) and Mild Steel. Your dealer will advise based on your site’s water TDS.
Chrome
Inner SS304
Soft water, low–moderate TDS. Ideal with softeners installed.
TDS: 0–200 ppm
Warranty: 5 yrs (Verda) · 2 yrs (Turbo)
Albus
Inner Galvanized Iron
Bore, river or municipal water. Zinc coating for long life.
TDS: 150–400 ppm
Warranty: 5 yrs (Verda) · 2 yrs (Turbo)
Minerva
Inner Enamel Glass Lined
Hard water and high TDS. Chemical resistant, food grade, 10-year warranty on non-pressurised.
TDS: up to 1000 ppm
Warranty: 10 yrs (Verda) · 2 yrs (Turbo)
Mild Steel
Inner MS with Epoxy
Used in Turbo pressurised systems. Epoxy-protected, handles moderate TDS and high pressures.
TDS: 150–400 ppm
Warranty: 2 yrs (pressurised)
Turbo Pressurised Range — 100 LPD to 500 LPD (up to 5 bar)
| CAPACITY | COLLECTORS | ABSORBER | PRESSURE | DIMENSIONS | SUITABLE FOR | INNER TANK |
|---|---|---|---|---|---|---|
| 100 LPD | 1 | Copper / Aluminium | 5 bar | 2.5m x 1.2m | 2–3 users | SS304 / GI / Glass Lined |
| 200 LPD | 2 | Copper / Aluminium | 5 bar | 2.5m x 2.4m | 4–5 users | SS304 / GI / Glass Lined |
| 300 LPD | 3 | Copper / Aluminium | 5 bar | 2.5m x 3.6m | 6–7 users | SS304 / GI / Glass Lined |
| 500 LPD | 4 | Copper / Aluminium | 5 bar | 2.5m x 4.8m | 12–13 users | SS304 / GI / Glass Lined |
Commercial FPC systems — 500 LPD to 5,000 LPD (with solar collectors)
| CAPACITY | ABSORBER OPTIONS | THUMB RULE | GLAZING | CASING |
|---|---|---|---|---|
| 500 LPD | Copper or Aluminium | 2 m² heats ~125 LPD | 4mm toughened glass | Powder-coated |
| 1,000 LPD | Copper or Aluminium | 2 m² heats ~125 LPD | 4mm toughened glass | Powder-coated |
| 2,000 LPD | Copper or Aluminium | 2 m² heats ~125 LPD | 4mm toughened glass | Powder-coated |
| 5,000 LPD+ | Copper or Aluminium | 2 m² heats ~125 LPD | 4mm toughened glass | Powder-coated |
Available capacities: 500, 1000, 1500, 2000, 2500, 3000, 4000, 5000 LPD and above.
Pressurised and non-pressurised options available.
Collector sizing as per project requirements.
ETC or FPC — choosing the right technology
ETC Systems
Non-pressurised · 58mm tubes
Choose ETC if you need hot water for general use — bathing, washing, domestic hot water — without pressurised plumbing.
Best for:
Individual homes · Apartments · Hostels · Hotels · Factories
FPC Systems
Pressurised · up to 5 bar
Choose FPC if your plumbing is pressurised — Jacuzzis, showers with high pressure, or commercial/industrial sites with pressurised piping.
Best for:
Villas · Luxury hotels · Jacuzzis · Commercial establishments
System warranty guide
| Model | Inner SS304 tank | Inner GI / MS tank | Inner Glass Lined tank | Frames | Collectors |
|---|---|---|---|---|---|
| Radian, Arc (non-pressurised ETC) | 5 years | 5 years | 10 years | 1 year | 1 year |
| Verda (non-pressurised FPC) | 1 year | 1 year | 1 year | 1 year | 1 year |
| Turbo (pressurised FPC) | 1 year | 1 year | 1 year | 1 year | 1 year |
| Commercial systems (1000–5000 LPD) | 1 year | 1 year | 1 year | 1 year | 1 year |
Warranty covers the tank only. Tubes, rubber parts and accessories are excluded.
Refer to your warranty card for full conditions and exclusions.
Radian and Radian+ carry the same warranty coverage.
200+ dealers · 10 states · 200+ districts
Service requests responded to within 6–8 working hours. Replacement requests closed within 7 days. One of the fastest response times in the industry.
Annual and comprehensive maintenance contracts
For large commercial and industrial installations. Covers preventive maintenance, cleaning schedules, performance checks and fault response. Call us or enquire online.
Find the right system for your site
Not sure whether ETC or FPC is right for you, or which inner tank suits your water quality? Our team will help you choose.