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How to Install a Solar Water Heater on Your Roof: A Beginner's Guide


Welcome to our comprehensive guide on how to install a solar water heater on your roof. Whether you’re looking to save on energy costs, reduce your carbon footprint, or ensure a reliable hot water supply, installing a solar water heater is a fantastic investment. This guide will take you through the entire process, making it simple and accessible for beginners. We will cover everything you need to know, from selecting the right system to the actual installation process. So, let's get started on your journey to sustainable hot water!

How to Install a Solar Water Heater on Your Roof

Understanding Solar Water Heaters

What is a Solar Water Heater?

A solar water heater harnesses the power of the sun to heat water. It’s an eco-friendly solution that can significantly reduce your electricity bills. Solar water heaters are ideal for homes, apartments, hospitals, guest houses, and even PG accommodations.

Types of Solar Water Heaters

There are two main types of solar water heaters: active and passive systems. Active systems use pumps to circulate water, while passive systems rely on natural convection. Both have their pros and cons, so choose the one that best fits your needs.

Choosing the Right Solar Water Heater

Factors to Consider

When selecting a solar water heater, consider the following factors:

  1. Capacity: The size of the system should match your hot water needs. A typical family might need a 200-liter system. For larger setups like hospitals or guest houses, you might need a larger capacity.
  2. Climate: Your local climate will influence the efficiency of your solar water heater.
  3. Budget: Consider the initial cost and the long-term savings. The solar water heater 200 litre price can vary, so shop around for the best deal.

Top 10 Solar Water Heater Companies in India

Choosing a reputable company ensures quality and reliability. Here are some top companies to consider:

  1. Varistor Solar
  2. Tata Power Solar
  3. V-Guard
  4. Racold
  5. Supreme Solar
  6. EMMVEE Solar
  7. Solarizer
  8. Sudarshan Saur
  9. Havells
  10. Kamal Solar

Preparing for Installation

Assessing Your Roof

Before you start, ensure your roof can support the solar water heater system. Check for structural integrity and the angle of the roof, as it needs to be oriented towards the sun.

Gathering Tools and Materials

You will need:

  • Solar water heater kit
  • Mounting brackets
  • Piping and insulation
  • Wrenches and screwdrivers
  • Sealant

Installing the Solar Water Heater

Step-by-Step Guide

  1. Mounting the Solar Collector:
    • Secure the mounting brackets on the roof.
    • Attach the solar collector to the brackets, ensuring it is tilted at an optimal angle to capture sunlight.
  2. Connecting the Pipes:
    • Connect the cold water inlet pipe to the bottom of the collector.
    • Attach the hot water outlet pipe to the top of the collector.
    • Insulate the pipes to prevent heat loss.
  3. Installing the Storage Tank:
    • Place the storage tank close to the collector.
    • Connect the hot water outlet from the collector to the tank.
    • Ensure all connections are tight and sealed to prevent leaks.
  4. Connecting to the Water Supply:
    • Connect the cold water supply to the storage tank.
    • Ensure there is a pressure release valve installed to prevent any build-up.
  5. Testing the System:
    • Fill the system with water and check for leaks.
    • Turn on the system and monitor the water heating process.

Maintenance and Troubleshooting

Regular Maintenance

  • Check for Leaks: Regularly inspect the system for any leaks.
  • Clean the Collector: Keep the solar collector clean for maximum efficiency.
  • Monitor the Performance: Ensure the system is heating water effectively.

Troubleshooting Common Issues

  • No Hot Water: Check the connections and ensure the collector is receiving sunlight.
  • Leaks: Tighten any loose connections and replace damaged pipes.
  • Poor Performance: Clean the collector and check for blockages in the system.

Benefits of Installing a Solar Water Heater

Cost Savings

A solar water heater can significantly reduce your energy bills. The initial investment is offset by the long-term savings on electricity costs.

Environmental Impact

Using solar energy reduces your carbon footprint and contributes to a sustainable future. It’s a clean and renewable energy source.


Solar water heaters are suitable for various applications, including homes, apartments, hospitals, and guest houses. They are especially popular in cities like Bangalore and Jaipur, where sunlight is abundant.


Installing a solar water heater on your roof is a smart and sustainable choice. With this guide, you now have the knowledge and confidence to take on this project. Not only will you save money, but you'll also be contributing to a greener planet. Remember, choosing a reputable company like Varistor Solar ensures you get a high-quality system that will serve you for years.

Now It's Your Turn:

Making the switch to solar water heaters in Delhi is a smart and sustainable choice. The top brands like Varistor Solar™, Racold, Havells, V-Guard, and AO Smith offer reliable options to meet your hot water needs efficiently.

Among these, Varistor Solar™ stands out as the top choice in India, trusted by many. We provide a variety of solar water heaters, catering to different preferences and requirements. Our clients trust us for our quality and performance.

For more details about our solar water heaters, call us at 9113690456 or email sales@varistorsolar.com. Choose Varistor Solar™ for a greener and more energy-efficient future.


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