Wednesday, December 1, 2010
Residential Solar Energy Explained
On the environmental side, going solar can reduce pollution, slow global warming, reduce your carbon footprint, reduce dependence on fossil fuels, and can generally make you feel good about the energy you're saving. Just read what Andrew Kin had to say about having solar panels on his townhouse in Los Angeles. It's inspired him to use less energy too. Better yet, your friends may follow your lead and switch their homes to solar energy.
Federal, state, and local solar rebates are bringing the price of residential solar energy way down such that it is getting competitive with the heavily subsidized coal energy that makes up much of the grid energy. In some states like New Jersey, the incentive programs are so aggressive that a system will pay for itself in 3 or 4 years, and will end up saving a homeowner a tremendous amount of money over it's 25+ year life, all the while supplying clean energy to their home.
In other areas, like San Francisco, it may take closer to 7-10 years for a system to pay for itself if you buy it outright from the start. You'd pay a larger lump sum up front, then have an extremely small energy bill for the next 25 years and the savings from the energy bill will pay for the system in 7-10 years. Beyond that the savings are all upside and home owners often end up saving tens of thousands of dollars, if not hundreds of thousands over the life of the system.
However, if you don't want to pay for a system up front, there are several ways to get around that. Solar leases and Solar Power Purchase Agreements (SPPA or PPA) are both gaining in popularity and availability. In both cases it's similar to leasing a car. You could pay $20,000 up front for a car, or you could pay a much lower monthly lease price, then either buy the car once the lease is up, or turn it back in effectively only having paid for the time you used it. With a solar lease your solar provider actually owns the system after they install it on your roof, but you pay them a set monthly fee to lease the system. That least payment combined with your new, much smaller energy bill will generally be lower than your current electricity bill. If you go with a solar lease you will have a predictable energy bill and predictable, stable lease payment and you'll be getting clean, green, renewable solar energy. You'll also be protected from rising energy costs. Solar lease payments do increase around 2.5% to 3.9% a year, but that's a lot less than the annual 6% or more increase in the price of grid electricity.
A solar power purchase agreement is very similar in that your solar provider owns the panels, but in the case of an PPA you only pay for the energy produced rather than a flat rate for the lease. A lease payment is fixed, but a PPA payment fluctuates with how much power your system produces each month. But at the end of the year a lease and a PPA cost about the same. In both cases the solar provider owns the system so they handle and any all cleaning, maintenance, warranty issues, replacement parts, etc. Generally residential solar energy systems require very little maintenance - maybe spraying them with a hose or hiring window washers to clean them once or twice a year. However inverters (the part of the system that turns the electricity from direct current (DC) to alternating current (AC), which is what our homes can use) do only come with a 10-year warranty and generally only last 10-15 years. Whereas solar panels come with a 25+ year warranty and generally last even longer. Therefore if you do buy your system, you'll likely have to spend $2,000 or so after 10-15 years to replace your inverter. Whereas if you go with a lease or a PPA, the solar provider will cover the cost of that for you.
If you're looking at it from a purely financial perspective, getting a home equity loan at a low rate and writing a check for your residential solar energy system will give you the greatest financial savings/income over the life of the system. But some home owners are willing to have it be slightly less financially advantageous over the long run (lease or PPA) to not have to deal with any maintenance of the system.
As a quick aside, some homeowners have recently started asking about whether the energy & materials used in making the solar panels off-set the good that the panels do by creating clean energy. In other words, how long do the panels need to produce energy for them to offset the amount of energy it took to build them in the first place. The short answer is that it only takes about a year. On top of that many facilities that make solar panels have enormous solar arrays on their rooftops so the panels are often made with clean energy from the start.
How about DIY? The DIY (Do It Yourself) movement is gaining momentum across many industries since in many cases you can save quite a bit of money by doing something yourself. Unfortunately we do not recommend the DIY approach for residential solar energy unless you happen to be a professional roofer or electrician.
In most cases federal, state, and local solar rebates are only given if the system is installed by an approved, certified solar installer. So while you may save on some of the installation costs, the lack of rebates (often about 50% off) negates the savings.
Your power company must approve the installation before it can be connected to your power box (circuit breaker) and if their inspector find that your installation does not meet their standards, you may have to pay for them to be reinstalled properly.
If you install the panels your self, you'll still need to hire an electrician to connect them to your circuit breaker (once the power company approves it), and some electricians will not work on DIY installations due to the risks involved.
Working on your roof is dangerous. The risk of falling is real and without proper safety gear it's a risk not worth taking. Professionals are trained, insured, and have all of the proper safety gear to ensure a safe installation.
If you've read this far you are probably wondering where to start. Going solar is easier than you think.
We recommend getting rel=nofollow [http://www.residentialsolar101.org/free-evaluation]solar energy quotes from several installers, then following our guide on how to compare solar quotes. Also take a look at our list of 10 things to know before you go solar. Aka how to prepare for a residential solar installation. The quick summary is that you want to:
Get a year's worth of energy bills together
Spend some time thinking about how you want to pay for the system - Finance, Solar Lease, Power Purchase Agreement, etc.
Know what your motivation is for going solar
Think about your roof. Is it in good shape, or will it need to be replaced shortly? If so, it's probably worth doing that first so that you don't have to remove the panels in the next few years go work on the roof.
Check to see if your roof has clear sun on it all day. Ideally you want a south facing roof with no shading and a clear view of the sun all day. (the way panels are hooked up, if shade gets on one of them it greatly reduces the efficiency of the entire system. Although recently developed micro-inverters can help in that situation)
Once you have selected an installer and figured out how you want to pay for the system the rest is extremely easy. The installer will handle all of the paperwork around permitting, federal, state, and local rebates, then they'll deduct those rebates and incentives from the price of the installation. That way you get the rebate savings instantly rather than having for the federal government to send you a check.
Once the paperwork is taken care of the installer will come out and install the system over the course of a day or two. Here's a short write-up on a volunteer solar installation we did back in 2009 as part of a volunteer day with Grid Alternatives. 90% of the work is on the outside of your house. The installers will put up a metal frame on the roof, attach the panels to the frame, the wire them together. They will also install conduits through the house or along side the house to route the wires down to your utility panel / main circuit breaker. Next to the circuit breaker they'll install an inverter and will connect the wires from the panels to the inverter. The inverter is what "inverts" the power from DC to AC, which is what is used by home appliances. Depending on where you live either the installer will do the final connection to the utility panel, or you may have to have someone from your utility company come out and inspect the installation, then make the final connection. Then voila! You'll get to watch your meter spin backwards on sunny days.
We haven't yet addressed how to size your system. Many (but not all) utility companies offer net metering for home solar energy systems. That means that instead of looking at your energy use (and production) on a month to month basis, they look at it on a yearly basis. That way your solar energy system can product more energy than you use in the summer months, then less than you use in the winter. That way it averages out that you'll be producing slightly less energy than you actually use over the course of a year. The reason for that is because utility companies that offer net-metering will give you credit for the energy you produce, but many won't pay you for energy that you produce in excess of what you use. So you could in theory zero out your energy bill for the year, but very few utility companies will actually write you a check at the end of the year. And actually, there's usually still a very small monthly or annual "connectivity" fee to stay hooked up to the grid.
So why stay connected to the grid? Because the power rarely goes out, and if you were to install enough batteries to store a few days worth of energy it would almost double the cost of the system. When you're on the grid (ie. hooked up to a utility company like you are now) the grid acts as your battery. When you produce more energy than you use it gets pushed into the grid. Then, at night, when you're using energy but not producing any energy you can get it from the grid.
Hopefully that's a comprehensive introduction to residential solar energy. If you're ready to get started, we'd love to put you in touch with a few top local installers who will give you free solar energy estimates to get you on your way!
David Belden is a solar energy entrepreneur and most recently he is the co-founder of [http://www.residentialsolar101.org]Residential Solar 101. He spend his days figuring out how to make solar energy more accessible to home owners across the country.
Article Source: [http://EzineArticles.com/?Residential-Solar-Energy-Explained&id=4793705] Residential Solar Energy Explained
Sunday, August 9, 2009
Is Green DIY Energy Worth Your Time and Money?
If you are like many people today, you would like to save money on your electric bill and reduce your carbon footprint by going "green". Building a renewable energy system for your home is a great option for those who are willing to put in some time and effort into their energy system.
However, again, if you are like most people, you do not have extensive knowledge on solar panels and their energy systems, let alone how to construct and implement one in your home. That is why choosing a helpful DIY energy system guide is a wise choice for the weekend DIYer who wants to build his or her own energy system.
There are many different green energy DIY guides out there; all available for purchase and instant download online. Off the top of my head, I could name ten DIY green energy guides, and on the surface, they all appear to be the same. Nevertheless, in reality, there are good green energy DIY guides and there are bad green energy DIY guides.
The good ones offer:
- multiple manuals on different green energy systems
- "how-to" videos
- Extensive parts and tools lists
- Free bonuses
- Money-back guarantees
- IRS solar energy tax rebates forms
- Tips and tricks for saving energy throughout your entire household
Two quality green energy DIY guides that meet all the criteria are Green DIY Energy and Earth 4 Energy. Between the two, Green DIY Energy offers more value for your money. They both cost the same - $50, but Green DIY Energy gives you better content.
With Green DIY Energy, you get two thorough and clear manuals - one on solar power systems and one on wind power systems. You also get instructional videos on 7 different aspects of making solar panels and windmills. The videos are great because they cover the more complex steps in the process, so you can watch someone do it right, instead of merely reading about it - great for visual learners, like myself.
Another cool thing about Green DIY Energy that sets them apart from the competition is that they give you a step-by-step example of how they built a working solar panel system for only $98! All other guides claim to show you how to build a solar panel system for under $200, but Green DIY Energy is the only one who teaches you how to build one for under $100.
The Secrets of Building Your Own Solar Energy.......for Less Than $200
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The last thing that really sets them apart from the competition is their interactive forum that all members have access to. You can ask questions, post advice and suggestions, and get ideas from other Green DIY members.
Green DIY Energy Review
Are you interested to learn more about the Green DIY solar electricity system? More people around the world today want to learn about renewable power systems, and I am glad that I myself have successfully been able to build my own DIY solar power system. There is a lot of hidden potential in renewable energy systems that the general public has just not found out about.
1. Is It Really Possible to Make Your Own Green DIY Energy System?
Home owners research into this idea because they are mainly looking for ways to cut down on their utility bills. This is due to the current economic crisis that has forced everyone to start thinking about how to save money. One alternative that most people have heard about but are not implementing is to build their own renewable energy systems. They are not implementing it because they have the wrong perceptions that it would be too expensive and difficult to build.
This is actually not true as I have found out for myself. Such green DIY energy systems are very easy to build and are the best way to cut down on electricity costs. Besides cost savings, there are also a whole host of other benefits that these systems can provide compared to using the traditional method of burning fossil fuels for electrical power.
2. Should You Use the Green DIY Energy System?
Most households will be able to use this system. As long as the system's solar panels can be put at a place where there is enough sunlight hitting on it every day, the solution would be viable for the homeowner. I definitely recommend all homeowners to start exploring the possibilities of solar power systems.
The Secrets of Building Your Own Solar Energy......for Less Than $200
Download Your GREENDIYENERGY Here Today