Using solar energy to light our house is not only beneficial economically but also helps saving our environment. For a regular house electricity consumption 1 kilowatt solar panel system is enough to install. Installing this system on the roof of your house may require 9 square-meter or 100 square-foot of space.
Introducing solar lighting panels
In this article, we will review the elements of a solar energy system and this will help understand, select and design your solar power project. Once you have a general understanding of how the solar energy system functions, choosing the right parts will become much easier.
You would also like to check to optimize/reduce your energy consumption. Using led lamps will give you energy savings also check if you are using energy-star rated equipment.
In a grid tie system, electricity is first generated by one or several solar modules (also known as photovoltaic or PV solar panels). A shutoff switch disconnects the system. Solar inverter will turn the direct current (DC) from the panels into alternating current (AC).
Then a home breaker box is used to distribute the power to the household appliances. Power meter will measure the unit of electricity going in and out from the system, to be sold back to the utility company.
Finding out how many sq.ft of roof or balcony area you have in order to install a solar panel, which varies by some factor like location, season etc.
|PV Module Efficiency (%)||PV Capacity Rating (Watts)|
For example, to generate 2,000 Watts from a 12%-efficient system, you need 200 square feet of roof area.
There are 3 options for mounting the panels on your roof, on the ground, or on a pivoting stand. Roof mount is found mostly convinient. There is a consideration facing the panel towards the equator, facing south in the northern hemisphere and facing north in the southern hemisphere. Pivoting stands is another alternate, they can be more effcient as they can follow the sun throughout the day. Another option is a ground mount. Also check with local ordinances, despite if you could take care of a flying bird getting burn in a hot summer day.
Systems rated between 1 and 5 kilowatts are generally sufficient to meet most of the needs of home and small business owners. You could work with your PV provider and examining past electric bills to determine the size of the PV system we need.
Let’s take an example. If you use a thousand watts daily, and you receive five hours of sunlight in a day, you’ll need a 200 watt panel to produce sufficient electricity for consumption. In New England sun light hours may be four hours so we require 240 watt panel or Like.
A regular 2/3BHK household using a microwave, will need about 15,000 Watts of power everyday. Depending on your location, 15kWh/day/ 5 peak sun hours = 3kW array, or 3,000 watts. For this you will need 15 200-watt panels.
Once you know what your target monthly output is in kilowatt hours (kWh), you can plan to install solar lighting panels. The cost of installing solar panel array starts from Rs.40,000. This system will last upto 25 years and have very low maintenance cost. Government also gives subsidy upto 30%. More grants and tax incentives are given by local and state government.
Solar Panels (Modules)
Basically There are two types of solar panel OnGrid and OffGrid panels.
OffGrid panel - Charge of installing offGrid solar panel is higher. In this an additional battery is charged from solar panels which can be used afterwards at evening time and when there is no solar light available.
OnGrid Panel- In this the solar panels are attached to electricity grid system so that produced additional electricity can be sold. Charge of installing these panels is lower although produced electricity cannot be stored.
Solar Inverters Are a Critical Component to your Solar Energy System
Now, having chosen your solar modules, you’ll need to decide on a solar inverter. the inverter changes direct current (DC) from the panel into alternating current (AC) that your appliances can use.
There are some considerations, make sure the inverter can handle the wattage as produced by solar panels. Also you can consider solar micro inverters, that are connected to each panel instead of the entire system as a whole.
Control unit is a compact system having in-built battery and a controller to protect the battery from overcharging or deep discharge.
For Metering contact your local utility company, mostly they will give you two way meter.
Benefits of installing solar system are it is economical as you save 30% on your power bills and it has lower maintenance cost, it lasts for long time and requires little attention.
It is a renewable source of solar energy. Consuming solar energy using this system will save production of green house gases like carbon dioxide upto 1.8 tonne per year.