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Vacuum Insulation
The vacuum between the tube walls greatly limits heat transfer by convection, helping reduce heat loss from the absorber.
Heat water with sunlight
Hot Water.
Smarter Energy.
Better Tomorrow.
Rooftop solar water heating solutions for homes, schools, colleges, government hostels and public/commercial buildings. Use sunlight to heat water and potentially reduce electric geyser use with the right system.
⌖ Paldi Meena, Agra Road, Jaipur, Rajasthan
Evacuated Glass TubesSolar heat collection technology
Insulated Hot-Water TankStores water and slows heat loss
Residential & CommercialAsk about your required capacity
A solar water heater: storage tank + evacuated glass tubes
Our core product
Not Solar Electricity Panels. Solar Water Heating.
A solar water heater captures the Sun’s thermal energy and uses it to heat water. An ETC model typically has a row of double-wall glass tubes connected to an insulated storage tank.
The tubes absorb solar radiation. A vacuum layer between the glass walls helps reduce heat loss, while the insulated tank helps keep the collected hot water warm for later use.
- Uses sunlight as a heat source
- May reduce electricity or fuel used for water heating
- Available system designs vary by capacity, water quality and pressure needs
- Backup heating may be useful during prolonged cloudy weather or high demand
Designed around useful heat
Why Consider an ETC Solar Water Heater?
Benefits depend on the actual product specification, installation, sunlight, water quality and usage. These are technology advantages—not a guarantee of identical results at every site.
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Solar Absorption
A selective coating on the inner tube helps absorb incoming solar radiation and convert it into heat.
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Natural Circulation
In compatible thermosiphon systems, warmer water rises and cooler water moves down, allowing circulation without a circulation pump.
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Insulated Storage
An insulated tank slows heat loss, helping keep collected water warm after sunshine hours.
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Tube-by-Tube Replacement
Some ETC designs allow a damaged tube to be replaced individually. Confirm design and spare availability for the selected model.
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Many Hot-Water Uses
Can be evaluated for homes, guest houses, hostels, hotels and other suitable hot-water applications.
Important: ETC glass tubes can break and hard water can cause scale build-up. System selection should consider local water quality, hail risk, pressure requirement, maintenance and the manufacturer's instructions.
Sunlight can do the heating
Hot Water Without Regular Geyser Electricity
Solar water heating sunlight ki thermal energy use karta hai—electricity generate karne wale solar PV panels se alag technology.
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Suitable passive systems mein
ETC jaise thermosiphon solar water heater mein sunlight se paani garam ho sakta hai aur natural circulation ke liye circulation pump ki zarurat nahi hoti. Is design mein water heating ke liye normal electric geyser jaisi direct electricity consumption nahi hoti.
Simple idea: Sunlight → heat → hot water. Jab solar heat aapki demand poori karti hai, to electric geyser ka use kam ho sakta hai.
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Important: har system same nahi hota
Kuch commercial systems pumps, controllers ya electric/heat-pump backup use kar sakte hain. Badal, winter, high demand aur installation design ke hisaab se backup heating ki zarurat bhi pad sakti hai.
Honest claim: Electricity saving system aur usage par depend karti hai. Website kisi fixed percentage ya zero-bill guarantee ka claim nahi karti.
Product-focused solutions
Solar Water Heater Systems
See the actual type of equipment used for solar water heating. Product models, prices and availability should be confirmed directly before ordering.
ETC — Evacuated Tube Collector
Rows of double-wall glass tubes connect to an insulated tank. The vacuum layer reduces heat loss from the absorber.
ASK ABOUT ETC ↗Rooftop Tube Installation
Collectors should be positioned with suitable sunlight exposure, safe structural support and service access.
ASK ABOUT INSTALLATION ↗Commercial Solar Hot Water
For hotels, hostels and institutions, sizing should use actual daily hot-water demand and peak usage patterns.
ASK ABOUT COMMERCIAL ↗Product photographs are used as visual examples from an external solar-thermal manufacturer page; they do not imply affiliation, dealership or that these exact models are sold by Goldstar. Replace them with your own authorised product photos when available.
Real-world installation examples
Rooftop Solar Water Heater Gallery
Homes se lekar schools, colleges, government hostels, hospitals, staff quarters aur large campuses tak—solar thermal hot-water systems alag-alag scale par install kiye ja sakte hain. Neeche ki photos illustrative references hain, Goldstar ke apne completed projects ka claim nahi.
College / Hostel Rooftop
Campus accommodation mein hot-water demand ke liye solar thermal installation ka example.
Institution source ↗
Large Campus Installation
High hot-water demand wale colleges, government hostels aur public campuses ke liye centralised arrangement evaluate kiya ja sakta hai.
Institution source ↗
Commercial / Institutional Scale
Multiple collector arrays aur insulated tanks wale larger hot-water setup ka example.
Image source ↗
College Rooftop Example
Educational building par solar water heater equipment ka illustrative example.
Institution source ↗Commercial ETC Collectors
Commercial hot-water systems mein collector banks ko site demand ke mutabik size kiya jata hai.
Image source ↗Central Solar Hot-Water Plant
Hostels, hospitals, hotels aur institutions ke liye engineered central systems evaluate kiye ja sakte hain.
Image source ↗Flat Plate Collector (FPC)
Glazed thermal collectors connected to insulated storage tanks; suitable system selection depends on site requirements.
Image source ↗Evacuated Tube Array
Close view of parallel vacuum tubes that absorb solar radiation and transfer heat to the system.
Image source ↗
Residential Rooftop Example
A tube-based solar water heater on a home rooftop; shown as a general reference installation.
Wikimedia Commons · CC BY-SA 4.0 ↗Photos are displayed as external illustrative references. Their respective owners retain applicable rights. They are not represented as Goldstar installations or endorsements. Image availability depends on the external source website.
The science in simple words
How the Tubes Turn Sunlight into Hot Water
Solar thermal collectors convert radiation into heat; they do not generate electricity like photovoltaic panels.
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Absorption
Sunlight reaches a selective absorber coating inside the tube, where radiant energy is converted into thermal energy.
2
Lower Heat Loss
The evacuated space between glass walls limits convection and reduces conductive heat transfer across the vacuum gap.
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Water Heating & Storage
Heat moves into the water through the system design. The insulated tank stores hot water; circulation method depends on the model.
ETC vs FPC: ETC uses evacuated glass tubes; FPC uses a glazed, insulated flat collector with an absorber plate. Neither is automatically best for every site. Water hardness, pressure, local weather, impact risk, maintenance and budget matter.
Understand electricity use
How Much Electricity Can a Geyser Use?
Use this simple estimate to understand the energy used by an electric geyser. Solar savings vary and should be estimated for your own usage.
Geyser Unit Calculator
Enter the geyser’s rated power and daily running time.
Estimated monthly electricity60 unitsAbout 2 units per day
Estimate assumes full rated power for the entered time; actual use may be lower due to thermostat cycling.
Example: 2 kW electric geyser
At full power, a 2 kW geyser running for 30 minutes uses approximately 1 kWh (one electricity unit). Running for one hour uses approximately 2 units.
Daily use: 1 hour
2 kW × 1 hour = 2 kWh/day
2 kWh × 30 days = 60 kWh/month
2 kW × 1 hour = 2 kWh/day
2 kWh × 30 days = 60 kWh/month
A solar water heater may offset some of the energy otherwise needed to heat water. The amount depends on solar availability, tank size, incoming water temperature, hot-water demand, insulation, backup use and system condition.
Scientific formula: Electrical energy (kWh) = power (kW) × operating time (hours). This is an illustrative calculation, not a guaranteed saving or bill reduction.
From sunlight to storage
How a Solar Water Heater Works
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Collect Solar Heat
Glass tubes and the absorber coating capture solar radiation and convert it into heat.
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Transfer Heat
Heat warms water through the collector's designed circulation or heat-transfer arrangement.
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Store for Use
An insulated tank keeps water hot for later use. Backup heating can help when sunlight is insufficient.
Choose the Right Solar Water Heater for Your Needs
Tell us your location, daily hot-water requirement and property type. Enquire about product options, capacity and pricing.
SEND AN ENQUIRY ↗Get in touch
Talk to Goldstar Solar Water Heater
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Contact Details
BUSINESSGoldstar Solar Water Heater
PHONE 1+91 9829663805
PHONE 2+91 8949513877
ADDRESSC-443, Paldi Meena, Agra Road, Jaipur, Rajasthan, India.
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