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Adopting Solar for urban Homes

  1. Sunny Side Up Switching to Green Homes By free Spirits Green Labs
  2. Have you ever thought that sun can light up your home for free ? And by free we mean 0 electricity bill !
  3. What to discuss ? Covering almost everything you need to know 1 3 5 7 Solar Energy for Home What is it ? Advantages/Disadvantages All the pros & cons you need to know Is your home solar friendly ? Requirements to adopt solar energy Some other products Products that can be used in daily use 2 4 6 8 Why switch to solar ? Need of the hour Types of Solar Systems Various systems you can adopt Electricity bill savings How solar system makes your e-bill 0 Solar around us How others are utilizing solar energy
  4. Solar Energy for Home What is a Solar Power System ? A solar power system uses solar energy to produce electricity for your home. • Whether you’re powering up your computer, running your dishwasher or brewing a pot of coffee, the energy comes straight from the sun – not from burning fossil fuels.
  5. Why switch to solar ? What is the need to switch from fossil fuels to solar energy ? • Converting to solar energy is the biggest personal change you can make to fight global warming. • India is blessed significant amounts of land areas having good sunshine for over 300 days a year. If solar (either in the form of PV or thermal) becomes cost effective, the entire country’s electricity needs can be fully met from solar alone!
  6. What can one solar system change ? Impact of single solar system installed • Here are some ways to think about the environmental impact that an average (5 kW system) solar home can have on the planet over the life of the panels.
  7. Advantages/Disadvantages You must know the pros and cons before deciding ADVANTAGES • Emissions - Solar has a clear advantage over traditional electricity generation in its effect on the environment. • Fuel Costs – Solar produces electricity with no fuel or ongoing costs, and will do so for the life of the installation. Even for a small panel installation to supplement your home's power needs, you will be able to see the benefit on your monthly power bills. DISADVANTAGES • Installation - generating power with solar cells is essentially free, purchasing and installing those panels is not. • Installing solar power for your home can be an expensive proposition, especially if you are attempting to derive all your power from solar electricity • Reliability - only works when the sun is up. Hence you will need to have a backup power source or use storage batteries to provide power at night or during inclement weather.
  8. How does a solar system works ? How is the system installed ?
  9. Is my home good for solar ? Available Roof Space Determines How Much Power Your Home Can Produce
  10. Comparison based on location Which location best suits the solar power generation.
  11. Sizing the solar power system Steps to sizing your rooftop PV plant • Scoping the project • Calculating the amount of solar energy available • Surveying the site • Calculating the amount of energy needed • Sizing the solar system • System size • Panel size • Inverter size
  12. Scoping the project Clearly laying out what you wish to achieve with your rooftop solar PV installation is critical to designing a plant that fits your needs. Examples of different kinds of needs we encounter in our work include • Completely supports your daytime electrical needs • Supports lighting loads • Supports critical loads during power cuts • Provides power for night-time use
  13. Amount of solar energy available • We expect about 4-7 kWh/m2/day of solar insolation in India. • That means we can generate 4 kWh of power per day from a 1 kWp panel. This is an average measure that can vary across different regions in India. • To have accurate calculations, we find out the exact insolation level for a particular home.
  14. Surveying the site • Already been discussed before. • Space available – 1 kW of panels would require 100-130 SF (about 12m2) of shade-free roof area • Orientation – A south-facing roof is ideal
  15. Calculating the amount of energy needed • Calculating the amount of energy needed • This home would require 10 kWh of power per day to satisfy the load. • At this point the plant designer might wish to identify large/variable loads that need not be supported by solar power or that can be operated through some other power source to reduce the investment in the solar system.
  16. Sizing the solar system • System size - This load requires 1.8 kWh/day. Adding a 30% safety margin to this, and assuming the insolation to be 4kWh/m2/day, we get System size = (Energy Requirement*1.3) /insolation level = 1.8*1.3/4 = 0.585 or 585 Wp. • Panel size – No. of panels = System size/Panel Rating • Inverter size We use a 45% safety margin when calculating the inverter size. Required Inverter size = Total Wattage of all appliances*(1+45%)
  17. Saving on electricity bills How much can be saved on electricity bill if using solar systems ? • Having solar panels can reduce your electric bills by a significant amount. • Every watt-hour of electricity your panels produce is one less watt-hour you have to buy from your utility company.
  18. Some other products Other solar powered products that you can use around you.
  19. Solar around us Who is already using solar power systems to power up their buildings • Jungle Lodges and Resorts - Five of the 20 cottages at Bidar, five of 18 cottages at Bandipur and five of 22 cottages at Bhadra have been connected to solar panels and batteries. • Greenpeace Office, Wilson Garden - A 15KW grid comprises the solar rooftop system. With solar panels, inverter and a battery back-up for six to eight hours, this system generates 70-80 units of electricity per day, slicing their electricity bill by Rs 15,000 per month. • Max Mueller Bhavan, Indiranagar - The institute started putting solar panels in place in 2008 and installed 35 solar modules with a total capacity of 7.8 kilowatt during peak hours so far. • Karunashraya, Marathahalli - This hospice has a solar water heating system in place too. Streetlights on the campus and along the driveway are also enabled by solar energy.
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