Posts tagged Solar Energy
Do You Need a License to Install a Solar Powered Electric System?
Sep 6th
This is a controversial topic in which many people feel that they should be allowed to perform their own solar panel system installations without being told that they need licensing. It is true that as a homeowner you can do whatever you like to your property because after all it is YOUR property but when it comes to what your property is connected too outside of its boundaries then this is where utility companies and building inspectors draw the line. For the most part homeowners tend to want what is known as a grid-tie solar panel system configuration and this simply means that the home will be powered by both your solar electric panels and electric utility grid provided power where the solar energy takes precedence and is used first. However, this type of configuration is what I would refer to as a give and take configuration which requires the approval of both the homeowner and their electric utility company.
During the daylight hours while your solar panels are supplying electricity to your home there may be times when the solar is generating more energy than the home needs.? It is at this time when the excess energy is actually being sent back out onto the utility grid power lines through a bi-directional electric meter. This process is more commonly known as “Net Metering” and is how a home can generate and bank electric credits with their electric utility. These same credits are then used in whole or in part during the evening hours when the solar panels can no longer generate electrical power and depending on your energy usage at night could result in there being left over credits each month. These credits are then paid out either monthly, quarterly or annually at a given rate per kilo-watt hour depending on your electric utilities payment schedule.
Considering all of this it is reasonable that the electric utility company expects the solar to have been installed by a licensed electrician who has full knowledge of all electrical codes that must be met during its installation. The fact of the matter is that any grid-tie configuration immediately goes beyond the boundaries of the homeowners property when this connection is made to the grid. So not only will your utility require this work to have been performed by a licensed installer it will also require an inspection by their personnel to ensure that all safety precautions have been taken for shutting off the solar matrix. The reasoning for this is in the event that their personnel have to conduct repairs to any part of their grid that is connected to a solar power source they can de-energize it to protect their workers from potentially lethal electrical shock.
Agencies such as the North American Board of Certified Energy Practitioners (NABCEP) take these requirements even further by requiring solar installers to receive additional training in a mentored program which maintains their certifications through continuous training requirements. Licensed electricians are also required to maintain their licenses through on going training credits and these programs are in place to ensure that safety procedures and building regulations are adhered too always. Only through using professionally licensed personnel who abide by these program requirements is the onus of responsibility placed squarely on the installer. Homeowner’s who attempt these installations without proper training and certification or licensing are in fact opening themselves up to potential problems that could mean very expensive financial ramifications. After all, if a family member needed surgery would you actually consider performing it yourself without actually being a trained and licensed surgeon?
Solar Energy Science Projects – Solar Water Heaters
Sep 6th
There has always been a lot of interest in the field of solar energy ever since it was first discovered that there was an immense potential in this field because of the kind of useful things that you can do with nature’s free source of energy, the sun. Since it is abundantly available all over the world for use for all human beings, it comes as no surprise that anything useful generated from this will generate a lot of interest from a lot of people.
In this article, I aim to take one step further and teach you how these solar water heaters work and how you too can get one of your own. This would be a very interesting solar energy science project to pursue and is something I would definitely recommend from my own personal experience since it won me a very valuable prize at a certain reputed science fair a couple of years back.
Basically the way they work is that water is made to flow through pipes that are pretty long and placed in a coiled shape under a glass panel (this helps in trapping heat and therefore increased efficiency). A water pump is connected to one end of the pipe and the other end of the pipe has hot water flowing out from it. This whole set up is placed under the sun and it is very effective in generating hot water. In this way, solar energy science projects can be very productive. In fact, by being innovative (such as by using mirrors, etc.), you can even generate a lot of heat that remains so even during the night. To go in more detail about using the mirrors that I mentioned just now, I did that at one of the science fairs myself and it helped it make my water heater much more effective and that impressed the judges. Basically, what I did was to place 4 mirrors around the water heater all angled such that they would reflect the sun’s rays onto the magnifier depending on what time of the day it was. Mirrors can be very effective when used in this way. This is just one of the creative things that you can do. You can probably think of many more ideas similar to that.
I hope that this article on solar water heaters as possible solar energy science projects helped you in making the best choice.?
