What Size Solar Power System Do I Need?

Solar System Size

It depends on how much electricity you use. Two homes the exact same size will use different amounts of electricity and therefore require different size systems. Major electrical loads within a home are air conditioners, electric heaters, pools, and other heating elements or motors.

That being said, an average 2,500 sq. ft. single-family home uses about 5,000 kilowatt-hours of electricity per year. A 3 kilowatt (AC) system will generate nearly all the electricity required for such a home on an annual basis. Sometimes a PV system can be installed that is slightly over-sized to allow for the possibility of a growing family or other factors that may play a part. When a system overproduces electricity, the unused portion is fed back into the grid and will actually be credited back to your utility account in a program called net-metering.

How Much Does Solar Cost?

Solar System Cost

Since every customer’s needs are unique, the exact solar panel system cost will depend on system size (see What Size Solar System Do I Need?), ease of installation, and state rebates or incentives. Each installation is custom built depending on the unique power needs of each residence.

Another option you may want to consider is leasing a solar panel system. Initial costs for installation can vary and lease payments are on a monthly basis, typically lower than what you currently pay for your electricity from the utility company. To learn more about leasing, please see Purchasing Or Leasing a Solar Panel System.

Why Solar Energy in India?

  • India has tremendous scope of generating solar energy.
  • The geographical location of the country stands to its benefit for generating solar energy.
  • The reason being India is a tropical country and it receives solar radiatio almost throughout the year, which amounts to 3,000 hours of sunshine. This is equal to more than 5,000 trillion kWh.
  • Almost all parts of India receive 4-7 kWh of solar radiation per sq metres. This is equivalent to 2,300–3,200 sunshine hours per year.
  • States like Andhra Pradesh, Bihar, Gujarat, Haryana, Madhya Pradesh, Maharashtra, Orissa, Punjab, Rajasthan, and West Bengal have great potential for tapping solar energy due to their location.
  • Since majority of the population lives in rural areas, there is much scope for solar energy being promoted in these areas.
  • Use of solar energy can reduce the use of firewood and dung cakes by rural household.