Beat the heat this summer ! Stop worrying about electricity bills….

Beat the heat this summer ! Stop worrying about electricity bills….

Its summer time and you can literally feel the heat. As you wipe the sweat from your body and reach for your AC remote, a thought comes to mind. What about the electricity bill?

Your split AC could be consuming 1.8 units of electricity per hour. Then there’s all those late night football matches on TV. With cricket matches and movies, your TV is on a 24 hour schedule. The fan to keep you cool and the lights switched on all day? The electricity bills will kill you this summer.

Is there a way to escape this nightmare? Why not go solar this summer?

Why Go Solar This Summer?

The answer is right before you. To save electricity of course, and help the nation save precious fuel.

1. Solar energy cuts down electricity bills

House owners are turning to solar energy because its free and it cuts down the electricity bills. I am not asking you to cut off your electricity connection from the power grid. That would be unwise.

Just install a rooftop solar plant and tap the power of the sun during the day. You can use the electricity from the power grid at night. This would cut down on costly electricity bills.

So why not go completely off the power grid? If you are completely cut-off from the power grid, you will need batteries to store solar power and batteries can be costly. Then there’s maintenance.

A good idea would be net-metering. Net-metering allows consumers who generate electricity from solar panels to use it anytime, instead of when it is generated.

So its simple isn’t it? Use all the electricity you want in the day from the solar panel and at night, use the power grid. You will save a lot on electricity bills this summer, right?

2. Get subsidies on going solar

The Government wants to save precious fuel. The Ministry of New and Renewable Energy has set a target that by 2022, renewable energy generation in India would go up 5 times to 1,75,000 MW.

The Government is serious on solar energy and provides you a subsidy of 30% on the total cost of installation of a rooftop solar plant. There is a special subsidy of 70% for people who reside in special category states.

So go solar this summer.

3. What about the cost of going solar?

The cost of a solar power system of 1KW which can generate an average of 120-150 units of electricity in a month can cost close to Rs. 40000-50000. But, you can save close to Rs. 15000-18000 a year on electricity bills. You could recover the cost of investment on solar equipment, within 4-5 years.

If your electricity bill exceeds Rs 1,500 a month, then consider going solar this summer. The solar panels could last for 25 years and require very little maintenance. A great investment, right?

So if you find electricity bills shooting up in summer, consider a grid-connected PV power system. This is going to be cheap as it requires less maintenance and no batteries, as energy is not stored. If there is ample sunlight in your area, go for a grid-connected PV power system. You can use solar power during the day and the power grid for electricity at night.

Go solar with  Greenergize India Solar and enjoy peace of mind this summer.



PV systems can be small and very simple, consisting of just a PV module and DC load. On the other hand, PV systems can also be built as large power plants with a peak power of several MW: these are connected to the electricity grid. Many systems are placed on residential homes. When a whole house or building needs to be powered and is not connected to the electricity grid, the PV system must be operational day and night, It may also have to feed both Ac and Dc loads, have reserve power, and may even include a backup.
Depending on the system configurations, we can distinguish three main types of PV systems:

  • Stand-alone/Off-Grid Systems
  • Grid Connected Systems
  • Hybrid Systems


Off-grid solar electricity is for homes that do not have access to grid electricity – i.e the house cannot be or chooses not to be supplied electricity from a power company.  These systems offer complete autonomy and independence from the national grid and power companies, meaning you never have an electricity bill. These panels generate electricity which is used to power your home and charge your batteries. The batteries allow you to store electricity for use at night or times of low production like cloudy days.

  • This kind of a system will allow a customer to go off the grid
  • However, these are the most expensive type as additional battery cost is incurred to provide a backup of up to 48 hours for a normal household or business functioning (including autonomy for a 1-2 rainy days)
  • This is the most common installation type for areas that have no grid connection but are not very useful for urban areas.
  • These systems are usually sized to not include air conditioning, as it is only a seasonal load. A larger system installed to meet peak summer demand will lead to wastage of power in the winters, making it un-economical
  • Savings from the system lead to a payback period of up to 10 years. After that, you get free power for 10 more years


Grid-connected Systems

Grid-connected PV systems have become increasingly popular for applications in the built environment. They are connected to the grid via inverters, which convert the DC power into AC electricity. The inverter is connected to the distribution board, from where the PV generated power is transferred into the electricity grid or to AC appliances. In principle, these systems do not require batteries, since they are connected to the grid, which acts as a buffer into which an oversupply of PV electricity is transported. The grid also supplies the consumer with electricity in times of insufficient PV power generations.

  • It is important to note that this type of system will not run if the grid is down and the diesel generator is also not running
  • For this type of system, solar power is always given preference over both grid and diesel. An intelligent solar inverter ensures that solar is first fully utilized and then remaining power requirement is drawn from the grid or diesel generator
  • Most systems being installed in Haryana for meeting obligations are also of this type.
  • This is the most economically viable system as there is no requirement to install a battery bank. For Gurgaon, we recommend this system for customers who already have 100% power backup. When you install this system, you will still need to run the diesel generator when the power goes off but your fuel consumption will be lower.


3. Hybrid Systems

These systems combine PV module with a complementary method of electricity generation such as a diesel, gas or wind generator. In order to optimise system the different methods of electricity generations, hybrid system typically require more sophisticated controls than stand-alone or grid-connected PV system. For example, in the case of a PV/diesel system, the diesel engine must be started when the battery reaches a given discharge level, and stopped when the battery reaches an adequate charging state. The backup generator can be used to recharge batteries only or to supply the load as well.

  • This type of system combines the benefits of both a grid tied system and an off-grid system. It is the most useful type of system for houses, bunglows, nursing homes and other smaller establishments. It acts like a home inverter.
  • It allows for the system to provide 6-7 hours of backup for part of the load during power cuts while still delivering the benefits of a grid-tied system.
  • These systems are usually sized to not include air conditioning and other seasonal induction loads. A larger system installed to meet peak summer demand will lead to wastage of power in the winters, making it un-economical
  • Perhaps one air-conditioner can be used on this system when the power goes out. It will just reduce the back-up hours to 4-5 hours. For running more A/Cs in a power cut, it is recommended that the customer use a diesel generator



 Photovoltaic (PV) modules make electricity from sunlight, and are marvelously simple, effective, and durable. They sit in the sun and, with no moving parts, can run your appliances, charge your batteries, or make energy for the utility grid.

A PV array is the energy collector—the solar “generator” and does so via the photovoltaic effect. Discovered in 1839 by French physicist Alexandre-Edmund Becquerel, the photovoltaic effect describes the way in which PV cells create electricity from the energy residing in photons of sunlight. When sunlight hits a PV cell, the cell absorbs some of the photons and the photons’ energy is transferred to an electron in the semiconductor material. With the energy from the photon, the electron can escape its usual position in the semiconductor atom to become part of the current in an electrical circuit.

Most PV cells fall into one of two basic categories:
  • Crystalline silicon  
  • Thin-film.

Crystalline silicon modules can be fashioned from either monocrystalline, multicrystalline, or ribbon silicon. Thin-film is a term encompassing a range of different technologies, including amorphous silicon, and a host of variations using other semiconductors like cadmium telluride or CIGS (copper indium gallium diselenide). Thin-film technology generates a lot of the current R&D chatter, but crystalline modules currently capture more than 80% of the marketplace.

To use the energy from the array, you may also need other components, such as inverters, charge controllers and batteries, which make up a solar-electric system. The components required are dependent on the system type design, that we will discuss in our next post.

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