Thursday, August 27, 2015

Going Off the Grid: Is Solar Becoming the Best Option?

An off-grid solar system is one that has no connection to the utility grid. It therefore provides all of the electricity for the residence or business, and the owner is responsible for all of the repairs and maintenance.

Staying on the grid is arguably easiest for many people. As Just Energy Ohio points out, solar systems tied to the grid are generally reliable and efficient. Also, if the property owner is leasing the solar system, the solar company is responsible for the repairs and maintenance. On the other hand, being tied to the grid makes the property owner completely dependent on it. In the event of a societal collapse, the property owner will have to hope their power company somehow survives. If they are already off the grid, however, they will be well-prepared to weather such a breakdown.

The first step in going off the grid is to conduct a “load analysis,” in which the property owner estimates the amount of energy they typically use. Utilities measure electricity consumption in kilowatt hours (kWh), and utility bills will tell the property owner how many kilowatt hours they used during the last billing period. Using a year’s worth of bills provides even more information. The property owner should also factor in any energy conservation methods they are using, plus data about the amount of sun they get in their area. Doing all this will help the property owner determine how much energy they use and how many solar panels they will need to install. They will also need to find the best place for the solar panels—and that place may not necessarily be the roof. Solar panels need to be where they will get maximum sunshine and minimum shade.

An off-grid system will need all of the same items as a conventional system: solar panels, an inverter, safety equipment, and a monitoring system. In addition, it will need a charge controller, a battery bank, and a generator. The latter will act as a backup source of energy for those days when the sun doesn’t shine. The battery bank stores any excess energy and the charge controller keeps the battery bank from overcharging. The charge controller also helps maintain the batteries, so getting a good one is vital. Since an off-grid system produces all the energy that a building will need, it will probably be somewhat bigger than a grid-tied system. It is best to get the system components from a local source, for they will also probably have the parts and tools needed for any repairs.

The battery bank will likely be the weak link in the system. While solar panels and inverters can last for at least 20 years, a battery bank has to be replaced every 10 or 15 years – and that’s with good care. The battery bank will need to be cleaned and have its connections checked regularly to prolong its life. It will also need water. The most important aspect of its care, though, is fully recharging the batteries regularly every few days. Even the Tesla Powerwall, which needs little or no maintenance, has only a 10-year warranty. Made by the car company of the same name, it’s a wall-mounted lithium ion battery. It comes in two sizes with the larger battery storing up to 10kWh. Up to nine Powerwall batteries can be linked together in a bank – but a single Powerwall battery costs at least $3,000.

Solar systems work well in many climates, but extreme heat reduces their efficiency. They are at their best on cool, sunny days. Solar panels that can track the sun are more efficient than those that don’t. While getting an off-grid solar system is not something that should be attempted without a lot of thought and preparation, the independence makes it worth it.

Elizabeth Eckhart is a freelance writer with an interest in energy conservation, living off the grid and the outdoors. You can link to her on Twitter at @elizeckhart

Tuesday, August 18, 2015

Essential skills you'll need for survival - wallpaper A theme of a doomsday has become quite popular especially nowadays when we may see many TV-series on this particular topic, zombie apocalypse etc. lately. Almost each year, there are rumors about the end of the world and prognosis on when it is going to happen. Repeatedly again, these rumors fail and everyone forgets about it until next time. Nevertheless, it is important to be prepared for anything in general and doomsday to come in particular. To be prepared means to obtain certain knowledge upon this matter, knowledge and skills.

It is similar to being able to give the first aid and have a medicine box with you. Speaking of the TV-series, it might be useful to watch some to get oneself ready and see for oneself what might be in use under circumstances like those. In addition, you will be able to offer your medical help in exchange for food or else. To give the first aid is one of the essential skills you will need to survive yourself and to help others. Among the rest, to be able to start a fire, to know at least a few ways how to do that, to build a shelter, to hunt, to get clean drinkable water, to gather food, speaking of which it is important to know which mushrooms and berries are edible, for instance. Along with hunting, one should know how to create traps and how to cook right to avoid diseases and bacteria.

People depend upon electricity and the ability to generate it is highly important and valuable. Communication, cooking and heating are those areas where it is impossible to go without electricity. Also, it would be good if you had an understanding of how to consume and what insects are to consume. This is a technique of survival and one of the most important ones of all time. Insects contain protein and it takes nothing to prepare them. Moreover, one should know how to handle a weapon. To be able to shoot and clean the weapon is a crucial skill too. Think tactically otherwise you do not belong to survivalists.

Start preparing yourself now by refusing to eat fast food, by physical activity and, of course, getting knowledge and skills you will need in case of emergency situations like catastrophes, apocalypses or else. How to shoot a gun or a crossbow, how to drive a car, how to pick edible stuff in the woods will come in useful when the time comes even though it would be better if anything od the kind never happened. One cannot be too careful, you know.

About the author: Melisa Marzett is a wonderful writer who works for the service, which you may look through at: Her posts are great and you would definitely enjoy reading her writings. She is fond of reading and her worldview is unique. The way she writes will definitely touch the strings of your heart. You will find a lot of new stuff for yourself after being acquainted with her works.