Compared to building materials, solar panels are expensive. This makes the entire building project very costly.

Homebuilders are usually very reluctant to suggest this idea to client unless they ask. They are afraid clients will go elsewhere. Homeowners are pretty ignorant about building integrated photovoltaics as well.

This doesn’t improve solar panel adoption rates at all. Thus solar panels are not commonly integrated into building structures.

Even though the energy yield of PV panels is not as high as separately-installed PV panels, their aesthetics are superior. Each building integrated PV panel’s energy output depends on its orientation, location, daily weather and season.

During summer, your PV panels can yield as much as 5 times the amount of electricity produced in winter. For example, your solar panels may be able to generate 500 watt-hours of energy in summer. However it only produces 100 watt-hours of energy in winter. Therefore preparation must be made for such trends.

A solar professional will be able to do a site analysis and let you know the energy output of the solar panels on your building through the seasons.

If you need to increase your energy production but are unable to due to space constraint, you can consider using solar trackers. These devices find out where the sun is and tilts the PV panels towards it.

Some manufacturers claim that solar trackers can almost double the power output of a solar array. However this is achieved only with increased cost and complexity.

You, the consumer, must make sure that your solar tracker purchase makes sense financially. And since mechanical parts are involved, there may be regular maintenance required. You must also be prepared to roll up your sleeves or get someone to do this.

As with all types of solar panels systems, a form of energy storage is required. If you’re using building integrated solar panels to serve as an off-grid power resource, then deep-cycle rechargeable batteries are a must.

Otherwise the lifespan of your batteries (which are not cheap) can be compromised. If you have a grid-tied (or intertie) PV system, shallow-cycle batteries may be acceptable although using deep-cycle batteries is still preferable.

Photovoltaic is still a relatively new technology. When they were just commercialized, solar panels were so expensive only NASA (and other large corporations) could afford them. But scientists have made significant efforts to lower its cost and increase its efficiency.

In the near future, we may see high quality solar panels that are as cheap as $1 per watt. When this is realized, building integrated solar panels will be a common sight.

Continue Reading:

1. Sizing Your Solar Energy Panels – Part 3
2. Creating An Energy Efficient House – A Primer On Why You Should Do It and How
3. How To Make A Solar Powered Air Conditioner

However this can be quite a daunting journey. You have to know many details and speak to many people in order to sieve out the best option for you.

Below are a few tips that can help you cut through the fog and gain some clarity:

1. Determine your budget

It is no surprise that solar panels are rather costly. A complete system for the average household may cost at least $20,000. However this should not deter you from installing PV panels. You can always start with a partial system that costs $12,000, and then put up more panels when you have the budget.

Different brands carry different price tags. Therefore it is important for you to know how much money you can spare for your solar setup. With this information, you (or a solar professional) can work out a plan that benefits you most in the long run.

2. Check if it is worth it

There are different numbers you must find out in order to know if using solar panels electricity is worth it in the first place. The most important of these is the solar intensity at your area.

If the sunshine is not strong enough, your payback period will be extraordinarily long. This means you may only get back the full return of your investment after more than 20 years instead of just 12 or 15 years. Or you may never get it back at all. Careful calculation is necessary to avoid errors in judgment.

The payback period is also determined by your solar panel’s efficiency. Needless to say, the more efficient your hardware is, the faster your payback period. However high efficiency solar panels (that are also of high quality) can be quite expensive. Thus you must have a basic understanding of various solar product and they can benefit you before signing on the dotted line.

3. Work out a plan

With many factors that determine whether installing solar panels at home is a worthwhile pursuit, it is wise to have a plan.

The first step of any good plan is to do a site survey. There are many instruments that can help you with this. A typical tool that many people use is the Solar Pathfinder.

After the site survey is done, you have to find out your energy consumption through different seasons in order to size your solar power system. Then you’ll need to devise a strategy to effectively utilize solar energy in every part of your house.

If all these seems confusing to you, your best bet is to call up a solar professional. Instead of spending time to find out about these details, a professional can educate you, devise an implementation strategy for you and help you coordinate different tasks with various contractors.

Before long, you can be using solar panels electricity for your everyday needs.

Continue Reading:

1. Do-It-Yourself Solar Panels – Electricity Conversion From Sunlight
2. 7 Tips You Can Use When Buying Solar Panels
3. Homemade Solar Panels — Common Mistakes to Take Note Of When Building And Installing Photovoltaic (PV) Panels

In general, climate has a direct influence on sunlight intensity. Different conditions (as listed below) may restrict or permit the use of solar panels on your property:

1. Sunlight.

The southwest part of the U.S. gets the most sun while the northern states (and Canada) gets the least.

Obviously if your area doesn’t have enough sunshine, it won’t be cost-effective to install solar panels. But how much is enough?

Studies show that the amount of sunlight we experience across the United States is more or less within 20% of the sunshine level in Florida. This makes it possible for most households to have solar panels on their roofs.

Occassionally, there may be shade issues at specific locations, but this can be solved in one way or another.

Generally, the more sun your home experience, the better (and faster) return you’ll have on your investment. You can get data about the sunshine your area experiences from the National Renewable Energy Laboratory (NREL). They recorded sunlight data on 239 locations all across the United States:

http://rredc.nrel.gov/solar/pubs/redbook/

2. Cloud

If you are living in a cloudy region, it is still possible to use solar panels. This is because solar energy is present although it’s diffused. Surprisingly, there is an advantage to this. The orientation of your solar panels becomes less important since light is coming from different directions.

3. Snowfall

Snow covers your PV panels and weighs them down. Some parts of your property may accumulate more snow than others. This may be because some spots are warmer than others. You will want to locate your solar panels where there is least snow accumulation.

4. Fog

Pollutants, fog and smog in the air affect sunlight intensity. If this is an obvious concern, you (or your contractor) should measure the sunlight intensity at your area to determine if you can get enough solar energy on a long-term basis.

5. Temperature

PV panels are affected by temperature. The lower the temperature, the better its performance. You can generally get more power output from a cold, cloudy day than a hot sunny day.

6. Air Density

Air density affects the amount of sunshine you receive. However its effect is marginal compared to the other factors. If you live on the mountains where air is thinner, you receive more sunshine. The air temperature may also be lower. Thus your PV panels will likely be more effective than when it’s installed at sea level.

7. Wind

Strong winds can damage your solar panel installation by tearing it from its mounts. But this, by itself, should not deter you from using solar panels.

To handle strong wind, you can either (i) use stronger mounts for your solar panels, (ii) use vegetation to block the wind, or (iii) use wind turbines to dissipate its force and to generate more electricity.

Some wind is actually good for solar panels. It helps to cool them down by bringing heat away. This helps to enhance its efficiency.

Continue Reading:

1. 7 Different Ways of Using Solar Energy At Home and In Your Office
2. Survey Your Household Energy Usage Before Installing Solar Panels
3. Before You Install Solar Panels, Plug All Your Air Leakages

Sealing Off A Crack

Before you install solar panels, you need to perform an energy audit.

This serves a two-fold purpose – to determine the size of your solar power generator and to identify sources of energy wastage that can be avoided.

As you are doing your household energy audit, it is useful to check for air leaks. They account for as much as 5 to 30 percent of your energy wastage (when it comes to heating).

If your windows and doors are closed and you feel an air draft, you have a good chance of cutting down wastage simply by plugging the leaks.

The best time to test for air leaks is when it’s cold outside and warm inside. You can feel cold air quite easily this way.

A pressure test can quickly surface any leakages around your house. All you have to do is close your doors and windows, turn off all heaters and turn on your exhaust fans to full blast.

In this way, the pressure inside your house is slightly lower than the outside. Thus more air will flow through those leakages to equalize the difference in pressure.

Go around the house and look for leaks. Pay more attention to windows, doors, electrical outlets, switches, hatches and joints. Once you find a leak, mark them out immediately.

Before you seal off those leaks, you have to turn off the exhaust fans.

You can use transparent silicon caulk to plug all your air leakages. The best way to handle this is to use a caulking gun that has a pressure relief gasket. This allows good control of silicon flow as you plug those leaks.

Another way to plug air leaks is to use an aerosol can of expandable insulation. This is difficult to use, initially, as it is hard to control its flow. But it works very well. So if it’s your first time using this, get some practice on used magazines.

There may be several places that leak air. Windows and doors are easy to handle. But if you have to climb up to your roof, remember to take precaution so you won’t risk falling.

After you’re done plugging up the leaks, repeat the pressure test. Then mark out those areas you have to work on again and get cracking.

You can also check for leaks outdoor. Most often, they appear in cracks, around faucets, pipes, electrical wiring and electrical outlets. Unfortunately there is no way you can feel for air leaks outside your house.

The only way to handle this is to do a visual inspection. If you suspect a leak, give that area a touch of silicon caulk.

After you are done plugging all your air leaks, your heating system can be more efficient. Thus your indoor temperature can be maintained using less energy.

Continue Reading:

1. About
2. Sizing Your Solar Energy Panels – Part 3
3. 7 Different Ways of Using Solar Energy At Home and In Your Office

1. Panel certification. This is a pre-requisite for federal and state rebates in the US. There are specific sets of standards that manufacturers must meet. These are some of the most widely used standards:

· IEC 61215 (for crystalline silicon)
· IEC 61646 (for thin films)
· IEC 61730 (safety, for all module types)
· UL 1703 (safety)
· CE mark (for EU regulations)

2. Flash Report. A flash test measures the power output in response to a short burst of xenon light source. The flash lasts for 1 to 30 milliseconds at a light intensity of 1 watt per Meter Square. The spectrum of the light source closely resembles the solar spectrum. The results in the flash report are then compared to the specifications of the PV module’s datasheet.

3. Series Fuse. Every solar panel has to be protected by a surge-protection device. This is to prevent unintended damage due to high currents leaking from neighboring panels.

Such condition (called backfeeding) occurs frequently whenever one series string of panels experience shading or has a damaged circuit. Series fuses are often located in the combiner box or in the grid-connected inverters.

4. Maximum Power Voltage. This is the voltage (V) when the output power is at its maximum. It is one of the important figures that must be considered when choosing a particular inverter or controller.

5. Maximum Power Current. This is the current (A) when the output power is at its maximum. This figure is usually needed in calculations for PV array disconnect labeling as required by National Electrical Code (NEC) Section 690.53.

Voltage Measurement

6. Open-Circuit Voltage. This is the maximum open-circuit voltage of your PV panel when it is exposed to sunlight. Note that no load should be connected while the measurement is done. Since the output voltage increases with lower ambient temperature, the open-circuit voltage is measured at the historic low temperature. This will determine the highest possible voltage output.

This rating is important for making sure your components (panels, wiring, inverters, charge controllers, electronics, etc.) are designed to take the maximum possible voltage.

7. Short-Circuit Current. This is the maximum current produced by your solar panel when short-circuited. It is important to ensure that fuses and breakers are rated to handle high current surge during such events. Thus this measurement must be done.

More important facts and properties of your solar panel can be found at the following links:

(i) Important Facts And Properties of A Solar (PV) Panel You Must Know About (Part 1 of 3)
(ii) Important Facts And Properties of A Solar (PV) Panel You Must Know About (Part 2 of 3)

Continue Reading:

1. Sizing Your Solar Energy Panels – Part 3
2. How To Build A Sun Tracking Mechanism to Increase Your Solar Panel Efficiency by 40%
3. Important Facts And Properties of A Solar (PV) Panel You Must Know About (Part 1 of 3)

This is the third and final part of the “Sizing Your Solar Energy Panels” series. Have you done some calculations for your future solar power system yet? If you have been doing those mini exercises, you’ll most likely find a suitable solar panel for your home by now.

The next step requires us to find an appropriate-sized battery bank, inverter and charge controller. Let’s look at each of these:

1. The Inverter

The inverter you choose has to be sized according to the demands of the alternating current (AC) side of the circuit. Therefore you will choose a specification according to the loads in your house (with a little buffer in case you increase your loads over time). Pretty straightforward.

2. The Charge Controller

You’ll at least need a basic charge controller to begin with. Until you get fussy about how advanced you want this component to be, more affordable models will do just fine. You’ll need to get a specification that fits the output current (Amps) of your solar panel arrays. If you intend to scale up your solar power generator, you’ll do better with a larger charge controller with room to accommodate more solar panels than with two smaller-sized ones.

3. The Battery Bank

The size of your battery bank depends on how you want to use your solar panels. You can size your battery banks such that it can get you through thick clouds that pass by, or you can size them so you can get through three solid days of solar eclipse and a power outage at the same time. It really depends on you. But take note that over-sizing isn’t always realistic. You have to take into consideration the space they occupy and the how much they’ll cost you.

If your home is grid-tied, provided there aren’t frequent power outages, the size of your battery bank isn’t critical. Just size it to take care of cloudy days will do. You can still maintain your lifestyle by drawing power from the grid.

When you design your battery bank, you’ll have less power loss (through wires) if the voltage is higher. If you are able to design a 48-volt system, you can conserve more power than when you use a 24-volt or 12-volt system.

Continue Reading:

1. DIY Solar Panels — Charge Controller Basics
2. Sizing Your Solar Energy Panels – Part 1
3. Sizing Your Solar Energy Panels – Part 2

There are obviously costs involved in setting up residential solar panels. Today, we’re going to look at these and balance them up with the financial gains you’ll experience. It’s a busy day, so let’s get right in:

Cost #1: Equipment.

Equipment forms the largest part of the entire solar power setup. These are PV panels, inverters, battery bank, regulators, et cetera. Equipment cost can be spread out over time if you want to expand your solar power generator over time. Perhaps your goal is to be able to build up one more solar panel every weekend. Thus your cost really spreads out over time. It can really be less taxing on your wallet this way.

Cost #2: Installation

If you want to do the installation yourself, you won’t have to worry about this cost. But if you want to get a professional or contractor to do it for you, remember o budget for this as well.

Cost #3: Interest

If you took up a loan to pay for your PV panels and other photovoltaic components, the interest is going to build up and this must be factored into the overall cost as well.

Cost #4: Permits, Fees and Taxes

In some locations, you’ll need to pay for permits and fees when you install solar panels over your roof or on your property. Generally, most states let you install solar panels without imposing taxes on them. But be sure to check with your local authorities so you know if you need to pay for any taxes.

Cost #5: Clearing Refuse

If you need someone to clear out any refuse for you, you may need to pay for their service.

Now these are all costs…how about the benefits, I hear you ask. Well, here are the financial gains you’ll enjoy:

Benefit #1: Lower Energy Bills

The most obvious benefit is the reduced (or eliminated) electricity bills. If you are adding solar panels gradually to your collection of “solar harvesters”, your energy bills will gradually reduce and may finally be eliminated.

Benefit #2: Hedge Against The Rising Cost of Energy

The cost of energy is set to rise as inflation and scarcity forces its price upward over the long term. We all experience this effect — everything seems to get more expensive! Yet when you’re tapping energy from the sun, it doesn’t get more expensive then when you first bought the photovoltaic equipment. Therefore while the rest of the world pays for electricity through their nose, you can quietly enjoy cheap electricity using solar panels.

Benefit #3: Appreciation

The price of your property will probably appreciate because you installed an asset. Depending on the valuation, you may get back what you paid for. This mean you’re really using all the energy for free through the years. If you built your own residential solar panels, you’re definitely going to get back more than you invested in equipment and other photovoltaic components.

Continue Reading:

1. Benefits Of Using Residential Solar Panels
2. Why Are Solar Panels The Best Investment For Your Home?
3. Residential Solar Panels — Reducing Your Carbon Footprint

Let’s take a look at Synchronous Solar Panel Inverters…

2. Synchronous Solar Panel Inverters

Synchronous solar panel inverters are also called Grid-Tie Inverters. If you want to have a grid-tied solar power generator, a synchronous solar power inverter will suit you well.

This type of inverter takes the electricity generated by your solar generator and feeds it to the distribution panel in your home. The power is either used by the appliances at home or flows out to the utility grid. If you generate excess power, you are able to sell the energy to your utility company at the rate you’re charged.

When there is no solar energy available during cloudy days (and at night), the system seamlessly taps into the grid supply to make up the difference in power.

As such, you are able to use energy from the grid or from the photovoltaic panels. With this design, you will not need to worry about an increase in energy consumption. In case the solar panel system you design is a little too small, you can use the grid power to supplement your consumption.

Next, let’s go see what a Multifunction Solar Panel Inverter can do for us…

Click Here To Read More About Multifunction Solar Panel Inverters

Continue Reading:

1. About
2. Sizing Your Solar Energy Panels – Part 3
3. Solor Panel Inverters – Stand-Alone Solar Panel Inverters

Solar Energy

Solar power is touted to be the next biggest solution to mankind’s energy problems.

As we know, there is a huge amount of environmental concerns when we use fossil fuel to generate electricity.

There are carbon emissions, nuclear waste and coal slurries that become toxic lakes, just to name a few.

As a country, we rely heavily on coal. When we use coal, we cause humans (especially miners) to come into contact with carcinogenic elements. This is because toxic heavy metals are found in coal. These can be released into our environment.

Some examples of harmful elements include arsenic, selenium, cadmium, mercury, chromium, boron, and nickel.

Fossil fuel is also limited in supply. This drives up the price of energy. Whenever the price of oil and natural gas rise considerably, the United States relies heavily on coal to reduce expenditure.

Naturally, people will be concerned when presented with such facts. But there is nothing much they can do other than voicing their opinions.

Fortunately humans also discovered photovoltaics, a technology used to produce electricity from sunlight.

As solar panels become more and more effective, they become a sustainable solution to a desperate world with insatiable energy needs.

Using solar power, we can all play a part to save the environment. We can help the country become less dependent on outside energy sources. We can save money.

Comparing all the energy sources available to mankind today, solar power holds the greatest promise for solving many of our energy issues.

The sun gives out a huge amount of energy every single day. Only very small proportions of its energy reach the earth. Yet this is sufficient to supply the whole world with energy 35,000 times over at any given moment.

This means if we can tap into just 0.003 percent of the solar radiation we receive on earth, we can solve the world’s energy struggle. (And also solve many political strives caused by conflicting energy interests.)

Solar energy can certainly play an important role in your family. When you install photovoltaic panels (also known as solar panels) on your property, you can enjoy many benefits:

a. You can save money on your monthly energy bills
b. Your property increases in value
c. You solar panels will eventually pay for themselves in the form of monthly energy savings, thus you’ll essentially own those solar panels for free.

In many places where it’s too expensive to run electrical cables, solar electricity becomes the cheapest form of electricity you can have.

Discover more about solar energy. You will be amazed how it can change your life in many ways.

Continue Reading:

1. Home Solar Power – Advantages and Disadvantages of Using Photovoltaic Generators to Power Your Home
2. Home Solar Power — Different Ways of Harnessing Energy From The Sun To Reduce Energy Bills
3. 3 Ways to Reclaim Value From Used Solar Panels

While you are working on your solar panels or solar heaters, you can also explore other small projects that can make your house a better place to live in.

Here are some projects that take you less than a day to implement. And many of them are very helpful in lowering your energy bills as well.

Most of them do not cost more than $100+, so if you have a little time and a little cash, you can begin right away:

1. Install solar screens

Solar screens help to keep your house cool during summer. It prevents heat from coming into your house through the windows. As such, your air-conditioners will not need to work as hard.

Most solar screens are quite affordable. The best ones are those with a metallic, reflective surface. They reflect radiation away instead of absorbing it. They are also pretty durable.

2. Solar ventilators

Ventilators can be installed at your attic, powered by solar energy. During summer, you can activate these fans to pump the heat out of your interior. This alone can cool your house considerably.

All you need is a small fan, a small vent that comes with a cover and a small solar panel. You don’t even need rechargeable batteries. It stops working when it becomes dark, but you won’t need it at night.

Try it.

When the weather gets colder, remember to cover them properly so heat doesn’t escape through these vents.

3. Solar powered air circulation

When you heat up your house, warm air rises to the top. They are all trapped at the ceiling or attic. Heat is not distributed evenly. You can install a ceiling fan to push the heat down, or use solar power to pump warm air down to ground level.

The effect: Your home warms us faster and you’ll feel more comfortable.

For this project, you’ll need a small solar panel, a set of rechargeable batteries, a long pipe and a small exhaust fan.

4. Landscaping

Planting trees, scrubs and bushes around your house can give you many benefits. You will not only create a beautiful and rejuvenating environment… You can prevent bitter cold winds from blowing against your house in winter and shelter your house from strong sunshine during summer.

5. Install solar light tubes

Solar light tubes allow natural light to enter your house while keeping the heat and precipitation out. They cost a little more. But you can experience the benefits of full spectrum lighting in your room without expensive illumination technology.

Continue Reading:

1. 7 Different Ways of Using Solar Energy At Home and In Your Office
2. Challenges and Difficulties In Using Solar Panels And How To Overcome Them
3. Survey Your Household Energy Usage Before Installing Solar Panels