Pool Cover for Solar Pool Heating

The pool cover keeps in the heat the solar pool heating system generates.

by Lauren Dansey

We couldn’t be more pleased with our solar pool heating system.  We have been swimming since late March, and the pool has been 85 to 90 degrees without turning on the gas heater.  But there are some good reasons why we’ve been able to maintain that temperature.

The solar pool heating system heats up the pool during the day, but that heat will be lost at night if you don’t use a pool cover.  As you can see from the picture, we cut the bubble cover we got when we built the pool to fit the pool almost exactly.  We also bought a pool cover reel to make it easy to put the cover on and off.  Without the reel, I think the cover would be too difficult to deal with.  Now, it’s one man (or woman) job to put the cover on or off.

We usually end up swimming on the weekends, and just leave the cover on during the week.  The pool will usually maintain its temperature over the weekend without the cover.  We’ve actually wanted to cool the pool down a little on some of our warmer weekends, and that happens at night without the cover.

For more information about solar pool heating, call us at 805-497-9808, or fill out the contact form on our website.

Solar Heating for the Pool – Working Great

The solar pool heating system pumps hot water into the pool most of the day.

by Lauren Dansey

The final installation for our two solar pool heating systems was completed last week, and we couldn’t be happier with the performance.  We installed two systems, a rooftop system (the dark panels below the solar electrical panels on our roof), and an in-deck pool heating system (underneath the concrete around the pool.)  The system begins to pump warm water into the pool as early as 8am, and continues until late in the afternoon. (We do have an ideal south-facing roof.)  We set the desired temperature, and a separate pump operates whenever the water in the solar panels is hotter than the pool temperature.  It shuts off when the desired temperature is reached.  The system pumps out an amazing amount of hot water — the kids are getting exercise by positioning themselves where the water comes into the pool and swimming against the current.

The in-deck pool heating system has an added advantage, also.  The concrete around the pool used to be too hot to walk on during hot afternoons, but now with the cooler water circulating underneath it, the concrete is much cooler.  The heat is carried to the pool.

The goal is to not use the pool heater at all.  We’re going to be careful to use a pool cover at night when the weather gets colder, and between that and the solar, we’ll see how warm we can keep the pool.

For more information about solar pool heating, call us at 805-497-9808, or fill out the contact sheet on our website.

He has only 308 solar panels on the roof of his presidential library, former President Bill Clinton announced at the opening of his Solar Power International 2012 keynote, and he is taking bids to drastically expand. “So if anybody wants in, send me an email.”
He then picked up the subject of creative cooperation he talked about at the Democratic National Convention.
To build “energy that is good economics, saves the planet from the worst consequences of climate change and promotes the national security of every country that is committed to clean, self-sustaining energy, you have to have cooperation between government and the private sector,” he said. “The constant mud fight, fact-free environment in which American politics often operates is counterproductive.”
He told a story about a minister who, during a sermon, excitedly told everybody in the congregation who wanted to go to heaven to stand up. Everybody but one little old lady in the front row did. “Sister Jones, the minister said, you are most devout member of our church. Don’t you want to go to heaven when you die?”
“She immediately jumped up,” Clinton said, “and yelled, Yes! But I thought you were trying to get a load to go right now.”
“Folks,” Clinton then said to the solar industry audience, “we need to get a load to go right now!”
To make that happen, he said, “Americans need to know more than they know now.” Most do not know that 100,000 people work in solar, that more people work in greentech than in coal, that in the depths of the recession, greentech grew at 8 percent, and that venture capital made the U.S. first in the world in greentech investment in 2011.
“To listen to the people on other side of this debate, you would think the President and his allies in Congress totally robbed the Treasury to subsidize bankrupt industries,” Clinton said, but “there are still $22 in subsidies for coal, oil and nuclear for every dollar invested in the clean energy future.”
Most Americans also don’t know, Clinton said, that the European countries that did the best during the recent financial crisis were those that had the most invested in greentech. Germany, he said, recently generated “from the sun alone, the equivalent of twenty nuclear power plants in a country where on average the sun shines as much as it does in London.” A Deutsche Bank study found, Clinton said, “the Germans have netted 300,000 jobs out of their commitment to a solar future.”
No government makes energy policy without public-private cooperation, he said. That creates “far more entrepreneurs, far more privatization, far more variation and creativity than any other way of energy development and electricity production.”
It was in what Clinton called George W. Bush’s “proto-socialist stage” as governor of Texas that the first tax credits went to wind developers, an incentive program that resulted in Texas being the leading wind state, with more installed wind capacity than all but a handful of countries.
“These are things people need to know,” he said. Greentech “is the direction people are going who are thinking about where the future is.” And, he said, “you represent the future. If we sell this as keeping America at the head of the future business, you will prevail.”
During a question-and-answer session with Solar Energy Industries Association President Rhone Resch, the former President turned to the subject of the Solyndra controversy.
It was, he said, “an innovative, interesting design” that ran into completely unforeseeable competition from unprecedentedly inexpensive imported Chinese silicon panels. It is important, he said, to get that basic fact out.
The bankruptcy, he said, “only represented less than 1 percent of the DOE’s investment in clean energy and it had nothing to do with tax credits.”
Take responsibility for the mistake, he told the solar industry, and provide context. “People accept the fact that the industry and the Energy Department made a mistake. Nobody does everything right.”
If a mistake stopped progress, he added, Neil Armstrong would never have walked on the moon because that happened two years after Apollo One burned up on the launch pad and killed three astronauts. And there would be no Mars rover now because that happened after the Challenger space shuttle exploded, killing its crew.
“You’ve got to take chances if you’re going to tomorrow’s dance.”
Resch asked Clinton how voters could choose between the presidential candidates. “Pay attention to what they’re saying,” he answered. “Politicians are more honest and hardworking than you think and they pretty much do what they say they are going to do.”
Clinton also advised the solar industry “to make sure in this political season that the candidates in both parties know what you’ve done,” adding, “make sure there are physical manifestations of it.”
He then recalled his efforts, beginning in 1977, to get Arkansas utilities to decouple energy efficiency improvements from rates. It took until 2010 for those utilities to seize that opportunity.
“You are going to bring America to a tipping point,” Clinton said. “You just need to bear down.” Sooner or later, he promised, “people will see this is good economics, helps in the climate change struggle and improves national security.”

Source: greentechmedia.com

Biltmore Apartments Solar Carports

Solar Carports reduce electric bills at the Biltmore Apartments in Thousand Oaks, CA

by Lauren Dansey

Solar Electrical Systems of Westlake Village, CA, has completed solar carport installations for two 500-unit apartment complexes in the area, eliminating their $2,000 monthly electric bills.
 New carports totaling 75kW were installed at the Biltmore Apartments in Thousand Oaks, CA.  New carport structures were built, taking advantage of the 30% federal tax credit for the solar electrical system, carports, new lighting and paving, and new electrical systems.  In fact, rebates and tax incentives paid for 85% of the project.  The solar electrical system will save the owners over $4 million over the system’s lifetime, and also improve parking, security, and storage on the property.
 At Oakview Apartments in Westlake Village, CA, 53kW of solar panels were mounted on existing carport structures.  Leaky roofs on the structures were removed and replaced with new roofs when the solar system was installed, again taking advantage of the 30% federal tax credit, with rebates and tax incentives paying for over 77% of the project.  The new system will save the owners over $1 million over the next 25 years.
Solar Electrical Systems is the most experienced solar design and installation company in Southern California, and has helped customers reduce or eliminate their electric bills since 1978.  For more information on commercial or residential solar electricity, radiant heat, solar hot water, and solar pool heating, contact Solar Electrical Systems in Westlake Village, CA at 805-497-9808 or visit solarelectricalsystems.com.

Concrete is poured over the in-deck solar heating tubes.

by Lauren Dansey

As the next step in our in-deck solar pool heating adventure, concrete was poured over the solar heating tubes.  When the concrete was poured, workers made sure that the tubes were approximately 2″ below the concrete surface.  This maximizes the heat that is transferred to the tubes, without the possibility of the tubes showing in the concrete.

The finshed pool and deck, with in-deck solar pool heating.

To the right is the finished pool and deck.  The concrete gets very hot in the direct sun, so we’re looking forward to turning on the solar.  We can’t turn the heat or solar heating on until a  month has passed so the pool surface can cure, but the temperature without heating is a very comfortable 85 degrees.  The rooftop pool solar and in-deck solar heating will allow us to extend our swim season year-round, without increasing our utility bill.  I’ll bring you an update when the solar is turned on and let you know how it affects our heating bill. 

Below you can see the rooftop solar pool heating panels on the roof, below the solar electrical (PV) panels.  We used ten 4 ft. by 8 ft. Heliocol panels.  They are shorter than the normal Heliocol panels, designed for roofs that don’t have room for the larger panels.  Solar pool heating is the most cost-effective use of solar in your home, with a return on investment of just 2-4 years.  We’re looking forward to swimming into the fall. 

Rooftop solar pool heating panels sit below solar electrical (PV) panels.

Solar tubing is placed for in-deck solar pool heating system.

Solar tubing is placed for our in-deck pool heating system.

By Lauren Dansey

The installation of our in-deck solar heating system is progressing.  The forms for the concrete were put in place, and then solar tubing was coiled where the cement will be poured.  As you can see from the pictures, as much tubing was put into the cement forms as possible.  The tubing should be about 2″ below the finished surface.  Darker deck surfaces work better for better heat absorption.

Deck coverage should be about 200 percent of the pool surface area, but we’re just putting in a small system to augment the Heliocol solar pool heating system that will go on the roof. 

In-deck solar pool heating is appropriate for pool decks, tennis courts, driveways and sport courts.  It will also cool your deck or tennis court when the cool water is pumped through the tubing.

Solar tubing is placed for in-deck solar pool heating system.Call us for more information on in-deck solar pool heating, rooftop solar pool heating, solar electricity, radiant heating, and solar domestic hot water.  We can show you how to reduce your home’s utility bills, and extend your family’s swim season without paying more to heat your pool. 

Next step … concrete is poured.

By Lauren Dansey

At our home in Westlake Village, we power our home with a dual solar electrical system.  A 9.2kW Kyocera system is on the roof, and we also have a 3.2kW patio cover system.  Because of these two systems, we don’t pay an electric bill, and when we recently decided to put in a pool, we were concerned about the added cost each month to heat it.  Our home, our car, and our business are all  powered by solar, so we thought it was only natural to heat our pool with it.
We have a small yard, so we’re only putting about 100 square feet of concrete around the pool, but we decided to put in a small in-deck pool heating system.  Tubes are put into the concrete when it’s poured, and water is circulated through the tubes.  When the cement heats up, it heats up the water, and that warm water is circulated to the pool.  The cool water running through the cement (before it heats up) also serves to cool down the concrete slightly.  This system works well for people who are putting in new cement and don’t have a lot of room on their roof for a rooftop pool solar heating system.  We’re also considering adding some rooftop pool solar.  There’s not a lot of room because of the solar electrical system, but Heliocol now has some small rooftop panels available.  Between that and the in-deck system, we should be able to cut our pool heating bill substantially.
We will post updates and pictures on the installation as it progresses.

Solar Hot Water is Where the Money Is

(SCE now offers rebates for electric-displacing solar water heating (SWH) systems in its service territory.  Call us for more information at 805-497-9808.)

A huge market globally, solar hot water is an almost untapped market in the U.S. that’s still innovating and cutting costs.

There are about 200 million solar water heating (SWH) systems in the world. There are about one million systems in the U.S. Year-on-year numbers, even during the recession, showed SWH to be an expanding domestic industry.

There are approximately 100 million residential water heating systems in the U.S., according to Sunnovations CEO Matt Carlson, and just under half use electricity, fuel oil or propane. “I’m looking at a market of 50-million-plus homes that don’t use natural gas to heat their water,” he said. “That’s a pretty sizeable market, and that’s where the opportunity is.”

Eight million water heaters are sold yearly in the U.S., Carlson said, at a cost of $1,000 to $1,500. The yearly water heating bill of a typical family of four with an electric system, he said, is $400 to $500, the second biggest energy cost to homeowners. It is more than “all of the load from the lighting and electronics of a home,” he added, and a solar system “is going to substitute for a good three-quarters of that, depending on where you are.”

The economics of SWH also depends on how much hot water is used. Commercial systems for businesses like agricultural and industrial operations, laundromats, and hotels are more economically viable.

A residential SWH system usually has a five-year to seven-year payback, depending on local conditions, fuel costs and incentives, but “we need the U.S. homeowner to be aware of this as an option,” Carlson explained, because “homeowners don’t always buy things for strictly economic reasons. What’s the payback on the water heater they have in their home right now? What’s the payback on the granite countertop they bought?”

A SWH system has a water heating tank that functions, Carlson explained, “exactly like a regular water heating tank except that it has a solar pre-heating heat exchange element in it that takes away the heating that the gas or electricity would do.” It also has “a backup heating element, because it is not sunny all the time.” SWH is, he said, “a fairly simple technology. A heat transfer fluid, glycol, runs through panels on the roof. The heated fluid runs into the tank and, voila, hot water.”

 Source:  greentechmedia.com

Are the decision-makers entrusted with determining the future of energy infrastructure operating under an outdated understanding of the cost-competitiveness of solar power? In many cases, the answer is yes, according to a paper released last week by Bloomberg New Energy Finance (BNEF).

In “Reconsidering the Economics of Photovoltaic Power,” BNEF CEO Michael Liebreich and nine collaborators document the precipitous decline in the price of solar power since 2009. “Average PV module prices have fallen by nearly 75% in the past three years,” they write, “to the point where solar power is now competitive with daytime retail power prices in a number of countries.”

Those facts so quickly upended what had been conventional wisdom (i.e., solar power is prohibitively expensive) that the new economics of solar power apparently caught decision-makers flat-footed. Here are the authors’ conclusions:

• The shift in prices of solar technology carries major implications for policy and investment decision-makers, especially when it comes to the choice of generating technology and the design of tariff, fiscal and other support policies.
Many observers and decision-makers have yet to catch up with the improvements in the economics of solar power that have resulted from recent PV technology cost and price reductions.
Recent reductions in PV prices are likely to be sustainable. While overcapacity has caused severe pain for manufacturers, the price falls are primarily a reflection of reductions in manufacturing costs, not solely a reflection of stock liquidation and other short-run factors.
Commonly used estimates for PV power’s competitiveness – including the concept of “grid parity” – are often misleading, given the complex realities of the electricity system. [emphasis in the above mine]

The aim of the paper, the authors say, is to “inform policy-makers, utility decision-makers, investors and advisory services, in particular in high-growth developing countries, as they weigh the suite of power generation options available to them.” That understated language masks a deadly serious message, with the authors’ words practically shouting from the page: We’re trying to help you prevent the conventional energy infrastructure lock-in that will tip runaway climate change.

Despite the forces arrayed against it – its perceived high cost, the lack of a price on carbon in much of the world, and concerted efforts by cosseted fossil-fuel incumbents to stifle its rise – solar power is booming. “Large drops in solar module prices have helped spur record levels of deployment, which increased 54 percent over the previous year to 28.7 GW in 2011. This is ten times the new build level of 2007,” the paper finds. 

According to BNEF, the levelized cost of electricity (the cost distributed over a project’s lifetime) for conventional silicon PV declined by nearly 50% from an average of $0.32/kWh in early 2009 to $0.17/kWh in early 2012; thin-film PV dropped from $0.23/kWh to $0.16/kWh over the same period. As of the first quarter of 2012, BNEF pegs the levelized cost range at $0.11/kWh to $0.25/kWh. Residential customers in the United States pay an average retail price for electricity of $0.115 cents/kWh.

The authors contend that if decision-makers understood the new economics of solar, it would hasten the deployment of PV in existing and new markets. “Despite the substantial drop in PV costs,” they write, “many commentators continue to note that PV-generated power is prohibitively expensive unless heavily supported by subsidies or enhanced prices. Outdated numbers are still widely disemminated to governments, regulators and investors.”

Outdated information has led not just to poorly designed and overly generous feed-in tariff (FiT) schemes but to missed opportunities. “If PV power is perceived to be too costly,” write the authors, “governments are less likely to take on the financial burden. This was the case in China in 2010, where the anticipated national PV FiT was dropped because solar PV costs were deemed too high.”

Homeowners overestimate cost of installing solar

If policymakers have not fully grasped the new economics of solar, it should come as no surprise that homeowners are similarly unaware. A Harris Interactive survey released last month found that 97% of homeowners polled overestimated the cost of installing solar; just 3% of respondents knew that the upfront cost to install solar could be less than $1,000, and, in some cases, nothing at all.

It’s a shame that bad or incomplete information is holding back the growth of solar power. Those in a position to reach decision-makers and consumers, journalists like myself included, must ensure that the improved economics of solar power becomes the new conventional wisdom.

 Source:  Forbes.com

U.S. trade officials ordered tariffs on imported Chinese solar panels of as much as 250%, according to SolarWorld AG’s U.S. unit.

The decision is likely to help U.S. solar-equipment manufacturers, although it could stir trade tensions with China.

The Department of Commerce has ordered tariffs of 249.96% for some amount of imports of Chinese solar cells and panels, while products made by Suntech Power Holdings Co. will have tariffs of 31.22%, products made by Trina Solar Ltd. will have tariffs of 31.14%, while other unnamed companies will see tariffs of 31.18%, SolarWorld said.

The department was scheduled to release a decision on the tariffs Thursday as part of an investigation into accusations that Chinese solar-panel makers receive unfair government subsidies and sell their products in the U.S. at prices below the cost of production.

In a related decision in March, the department imposed tariffs of between 3% and 5% on imports of Chinese solar panels and found that Chinese solar manufacturers enjoyed some unfair government financial assistance that helped the industry to become an export powerhouse.

The U.S. unit of Germany-based SolarWorld and six other U.S. firms brought the complaint to the Commerce Department last year and filed a similar complaint with the International Trade Commission, which has been conducting a separate investigation.

The decision comes at a difficult time for the solar industry, as sliding prices amid a glut of manufacturing capacity, primarily in China, have driven manufacturers’ profits and stock prices deeply lower. The market turmoil has forced several solar-panel makers out of business, including Solyndra LLC, which had received more than $500 million in federal assistance.

Chinese solar-panel makers such as Suntech, Yingli Green Energy Holding Co. and Trina Solar have denied the accusations. Many of their customers have come to their aid, arguing that low solar-panel prices are good for consumers.

U.S. suppliers to China’s giant solar-power manufacturing industry also oppose the antidumping tariffs over worries that they could trigger a trade war.

China’s Ministry of Commerce has criticized the U.S. investigations

But SolarWorld has argued that the U.S. solar market needs a strong domestic manufacturing industry to create jobs and protect against an over-reliance on foreign suppliers.

Chinese firms dominated the global solar-power market in 2011, supplying 46% of global shipments of solar cells and panels, according to research by Paula Mints, an analyst at Navigant Consulting. U.S. facilities supplied about 3% of global shipments, with most of those panels staying in the U.S., Mints said.

The same year, U.S. developers installed 1,855 megawatts of solar panels, more than double the amount installed the previous year, according to a March report by GTM Research and the Solar Energy Industries Association.

Source:  Marketwatch.com

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