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🌞 Solar Thermal

Solar Water Heater
ETC

Energy-efficient hot water using evacuated glass tubes. No electricity, no running cost — just pure solar heat year-round.

✓ No Electricity ⚡ 85–90°C Output 🛡 BIS-Certified 📋 Free Survey
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Solar Water Heater ETC
🏅 MNRE Certified
🔋 300K+ Installations
⚙️ In-House Team
📞 Free Survey
💰 Transparent Pricing
🌞 ETC Technology

How ETC Solar Water Heaters Work

Evacuated Tube Collectors (ETC) use rows of borosilicate glass tubes, each containing a smaller inner tube coated with a solar-absorbing material. The vacuum between the two tube walls eliminates heat loss to air, allowing the collector to reach temperatures of 85–90°C even on mildly cloudy days. Water circulates through the manifold at the top, absorbing heat as it passes over the tubes. With no moving parts and no electricity required, ETC solar water heaters are the lowest-maintenance hot water solution available. Kamal Solar systems include an insulated stainless-steel storage tank that keeps water hot overnight, so your first morning draw is always hot.

⭐ Key Features

Why Choose Kamal Solar Solar Water Heater ETC?

🌞
Zero Electricity Cost

Once installed, your hot water is free — powered entirely by sunlight. No fuel, no electricity, no running bills.

🌡️
High Temperature Output

Delivers 85–90°C on clear days, 65–75°C on overcast days. Suitable for bathing, cleaning, and commercial processes.

💪
Durable Borosilicate Tubes

Thermal shock-resistant glass tubes. The coating is UV-stable for 25+ years.

🔧
German Glass-Lined Technology

Advanced glass-lined tanks deliver superior corrosion resistance, longer lifespan, and reliable hot water performance.

🏗️
Easy Terrace Installation

Lightweight aluminium frame fits any terrace — flat or sloped up to 45°. Installation typically takes 4–6 hours.

🌧️
Cloudy Day Performance

The vacuum insulation retains heat even in diffuse light, providing useful hot water on cloudy and rainy days.

📐 Specifications

Solar Water Heater ETC — Technical Specifications

Capacity Range 100 LPD – 5,000 LPD
Tube Count 10–58 tubes per 100 LPD unit
Max Temperature 85–90°C (clear day), 65–75°C (overcast)
Collector Type Evacuated Tube (ETC) — borosilicate glass
Tank Material SS 304 inner / GI or FRP outer jacket
Installation Terrace — flat or sloped up to 45°
Annual Saving ₹8,000 – ₹30,000 vs electric geyser
❓ FAQs

Frequently Asked Questions — Solar Water Heater ETC

ETC (Evacuated Tube Collector) systems use glass vacuum tubes that retain heat even in cold or cloudy weather and can reach higher temperatures. FPC (Flat Plate Collector) systems use a copper absorber plate under a glass cover — they are more aesthetic, fully pressurized by design, and better suited to multi-storey buildings. ETC is the better choice for most ground-floor and terrace installations where maximum efficiency per rupee is the priority.
Yes. The vacuum in each tube acts as a thermos, preventing heat loss to cold ambient air. ETC collectors perform significantly better than FPC in cold climates. Even at 5°C ambient temperature, a well-insulated ETC system can heat water to 55–65°C on a sunny winter day.
Most households recover the installation cost in 2–3 years through electricity savings. A 200 LPD ETC system typically saves ₹10,000–₹18,000 per year compared to an electric geyser. The system itself lasts 20+ years, giving you 17+ years of virtually free hot water.
Yes, a 200 LPD ETC system comfortably serves a family of 4–5 people for daily bathing needs. If your household has higher usage (multiple bathrooms, long showers), consider a 300 LPD system. Kamal Solar offers a free site survey to assess your exact requirements.
Yes. Our in-house team handles everything from free site survey, structural assessment, plumbing connections, and commissioning. We do not use sub-contractors for installation, ensuring consistent quality and a single point of contact for warranty and service.

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