Will My Solar Panels Become Obsolete?

Recently I wrote about what to expect and what to look for in a solar warranty. One reader, Mary Ellen, raised a very good question in response. She wondered about the fast pace of solar innovations, including thin-film and other technologies, that might render today’s solar system obsolete by tomorrow. Indeed the solar industry is growing by leaps and bounds, and so is research and development of every facet of it, from new cells to smaller panels to higher efficiencies. So concern about buying now what you could pay half as much for in the near future is certainly a legitimate one.

There are but a few things I can say in response. First is that it is more or less a matter of personal judgment. Yes, the solar industry is changing fast and a variety of factors, including a ramped-up silicon supply and ever-increasing demand, will likely facilitate a fall in prices. As for efficiency, experts all over the world are working on newer and better ways to deliver solar power, but most of these innovations are still in the research phase and are probably 10 to 15 or even more years away from wide scale distribution. So, I suppose, it depends on how long you’re willing to wait. Many existing state solar rebates and incentives decrease over time, foreseeing the inevitable drop in cost. So while prices are higher now, rebates are also the most generous.

Secondly, the beauty of solar panels is that they do not exactly go obsolete. Unlike older cell phones with mediocre batteries that die and are thrown out, solar panels have no such parts. They degrade very little over time and should work for at least 20 years and even longer. Again, it is a matter of personal preference as to what you do right now. Nonetheless, today’s panels will work far into the future and, should technologies increase and panels become more compact, efficient, and cheaper, it will be easy to upgrade and fulfill the remainder of your electricity needs. (more…)

Will My Solar Panels Become Obsolete?

Microinverters: The Latest Improvement for Solar Panels

MicroInverterThe latest development in the rush to increase efficiency and decrease the cost of solar panels is the microinverter. Developed by Enphase Energy, with the help of numerous venture capitalists, this new innovation promises an inverter for every solar panel in an array. Its creators claim that these inverters can increase efficiency by 5 to 25 percent.

In a typical array one inverter, which converts direct current (DC) to the necessary alternating current (AC) that powers the home, is connected to each and every panel in that array. In the new Enphase Energy design, one microinverter for each panel would reduce installation costs by eliminating the need for many cables running to one single inverter. It would also improve efficiency by cutting down the distance of transmission in which energy is typically lost, allowing the panels to produce more usable electricity. (more…)

Microinverters: The Latest Improvement for Solar Panels

5 Simple Home Solar Power Options

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Even as the cost of home solar falls, the cost of conventional electricity continues to rise. The Energy Information Administration predicts that energy consumption will more than double by 2035 worldwide. Homeowners are starting to look at solar energy as protection against future price increases.

Fortunately, there are many solar options that will not only immediately reduce your monthly energy bills, but save you even more money over time. Here are five of the best.

For pricing on home solar power, click here.

1. Solar Water Heating Systems

Solar water heaters can cut your hot water costs by more than 50 percent. That kind of efficiency means that you’ll recoup the initial installation costs in around 5 years. Since the solar panels for these systems last 20 years or longer, you’ll enjoy many years of extra savings. A number of rebates and incentive programs can substantially reduce upfront costs as well. In fact, in many areas, there are more programs offered for solar hot water than there are for home photovoltaic (PV) systems.

2. Small Residential PV Systems

Even a few residential solar panels can make a significant impact in monthly electric bills, particularly if your utility company has a tiered-rate system. Utilities typically offer a base rate to cover basic electrical needs, but as your consumption increases, so do the rates. Many utilities increase rates further during peak-demand periods. The time of day when electricity is most in demand is usually in the afternoon, when solar panels are at their highest efficiency. As solar panels are modular, you always have the option to add more later.

3. Ground-Mounted (Backyard) Systems

If you’d like to go solar, but your home’s roof simply isn’t a good candidate for solar panels, consider a ground-mounted system. In the past, ground-mounted systems were considered more expensive, as they require extra equipment. But more and more solar contractors are offering ground-mounted systems that operate with GPS technology, enabling them to tilt towards the sun as it crosses the sky. This increased efficiency can offset the additional costs.

4. Solar Shingles

If you’re considering installing a new roof on your home, incorporating solar shingles into the design is another affordable way to work solar energy into your life. You’ll spend less than if you purchased a roof and a home PV system separately.

5. Solar Leases

Solar leases make it possible for just about any homeowner to enjoy lower electrical bills for little or no money down. The solar provider will install a system for you, maintain and insure it, and you just pay the provider for the electricity that the system produces at a locked-in rate, protecting you from rising energy costs.

Have You Gone Solar?

Have you made the switch to solar? What type of system did you go for, and why? Let me know in the comments!

5 Simple Home Solar Power Options

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San Jose: The Fastest-Growing California Solar City in 2012

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San Jose added more residential solar photovoltaic (PV) systems last year than any other city in California, according to the latest PV Solar Report, a quarterly analysis conducted by solar company SunRun.

San Jose’s number of home solar systems in 2011 was up 45.4% from just the year before, a dramatic increase that points to the rising popularity of home solar.

Out of the 960 home PV systems installed last year, 648 of them were leased systems, what SunRun calls “solar service.”

In total, nearly 7,500 home solar systems were installed in California last year.

SunRun, the nation’s top residential solar power company, installs over $1.5 million in solar every day.

SunRun president Lynn Jurich credits the company’s success to the growing popularity of solar leasing, stating that solar service “allows homeowners to make the switch for zero or very little money upfront, and they lock in a low rate for clean electricity.”

For home solar power pricing, click here.

Beginning in June 2011, solar leasing in California began to outpace purchased systems. In December 2011 alone, over 70% of solar installations in the Golden State were leased systems.

The appeal of leasing reaches beyond lower monthly electric bills. Many Californians are glad to find affordable ways to support technologies that reduce the nation’s reliance on fossil fuels.

San Jose residents can take advantage of incentive programs as well, including the federal tax credit program that can cut installation costs by up to 30%.

San Jose Pacific, Gas & Electric (PG&E) customers are also eligible for per-watt rebates from the utility. The current rate for PG&E rebates is $.25 per watt.

For a 4 kilowatt-sized home PV system in San Jose, rebates can cut the upfront costs from $33,000 to $22,000, with a payback period of about eleven years.

PG&E customers in San Jose can take advantage of net-metering, too. By reducing their conventional electrical use, they can often stay in the base-rate range, avoiding higher rates during peak demand periods.

Whenever the home is generating more power than the home is using, PG&E will credit the surplus to their monthly bill.

The PV report not only looked at the number of solar installations added, but the fastest-growing California solar cities, such as Hemet and Apple Valley.

“We thought it was important to not just look at which cities have the most solar installations,” said PV Report founder Stephen Torres, “but also those that are growing the fastest.”

San Jose: The Fastest-Growing California Solar City in 2012

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Proposition 7: Big Solar’s Baby?

California Proposition 7Two renewable energy initiatives will be put to the vote this November in California. Proposition 10, or the California Alternative Fuels Initiative, and Proposition 7, the California Solar and Clean Energy Initiative, have brewed up some very heated debate. I focused on Prop 10 in an earlier entry. Here I will try to dissect Proposition 7 and what it could mean for California, already a national leader in renewable energy.

What is Prop 7?

(more…)

Proposition 7: Big Solar’s Baby?

In San Diego, You Can Go Solar Without Owning a Home

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San Diego Gas & Electric (SDG&E) has filed two proposals with the California Public Utilities Commission (CPUC) that, if approved, may allow you to choose electricity generated by solar energy instead of fossil fuel-based energy, whether you own a home or not.

SDG&E is applying to begin two pilot programs. Information for each of them (and they’re worth checking out) is detailed below.

Note: for pricing on a residential solar system, click here.

Share the Sun Solar Farms

The first program, called “Share the Sun,” would allow solar contractors to purchase and install their own “solar farms” on their own or purchased property. San Diego customers would then be able to purchase a portion of the electricity generated from the provider installations.

You would be able to choose the size of the portion you wish to acquire, and would receive credit on your electricity bill for the value of the solar energy generated. In effect, this program would be similar to group-buying or community solar gardens.

Get a percentage of solar energy through SunRate

The second pilot program, called “SunRate,” would indirectly allow customers to purchase solar electricity produced by SDG&E’s own solar projects. SDG&E would establish a “green” rate that would reflect the cost of the solar energy generated by these projects.

In a twist that puts the power right in your hands, you could choose to have 50 percent, 75 percent or 100 percent of your electricity at the new, green rate. Although you would have to agree to a year’s subscription, the price (and reduction in energy costs) would be guaranteed for the term of the contract.

Why are utilities going solar?

In California, a utility’s renewable energy portfolio must represent 20 percent of that utility’s total energy distribution by 2013, and 33 percent by 2020. SDG&E has been showing progress towards reaching those goals, with several solar farms of their own up and running–and with more planned.

Recently, however, SDG&E proposed that the CPUC allow them to demand a “network usage charge,” a $20 to $30 a monthly fee, on homeowners who own or lease residential solar photovoltaic (PV) systems. The CPUC struck down the proposal.

SDG&E provides service to 3.5 million customers in San Diego and Orange County. The company is a subsidiary of Sempra Energy. Recently, Sempra Energy stock hit a new 52-week high. Before applying to the CPUC for the two pilot programs, SDG&E met with solar providers, community leaders and policymakers for input.

SDG&E is also proposing that the CPUC oversee a series of workshops where interested parties would be able to help shape the pilot programs to ensure transparency. Homeowners in San Diego can already save quite a bit on solar costs due to rebates, incentives and the like.

Should the CPUC approve the two pilot programs, many residents in the area will have the opportunity to go solar without installing a home solar power system at their own homes. As solar energy produced by larger solar installations typically costs less, residents may have the chance to lock in cheaper rates for their electricity, proving, once again, that going green can add green to the wallet, too.

In San Diego, You Can Go Solar Without Owning a Home

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Proposition 10: Delight or Detriment?

Proposition 10This November, California voters, widely recognized as among the most progressive on renewable energy issues, will have two big decisions to make. Propositions 7 and 10 deal with renewable energy mandates and alternative fuels, respectively. Considering the present mood of California, and the nation as a whole, you would think this was a no-brainer. However, both propositions are facing fierce contention from some surprising sources. So what are they all about? Right now I will address Proposition 10… I’ll focus on Prop 7 a little later.

What is Prop 10?Upon reading a summary of Prop 10, it seems like an easy choice. Basically, the measure allocates $5 billion in rebates, incentives, research, and development of alternative fuels and alternative and hybrid vehicles. This money would come in the form of a bond to be repaid from California’s general fund; in other words…taxpayers. $2.5 billion would be rebates for buyers of alternative-fuel vehicles. $340 million would go to buyers of fuel-efficient vehicles like the Toyota Prius, and the leftovers go to research and development.

Sounds pretty good, right? So why the heated battle? Here’s what both sides are saying: (more…)

Proposition 10: Delight or Detriment?

Semiconductors: The Science Behind Solar

Every technology has a foundation – that piece of innovation that makes it all possible. For solar power, it has to be the semiconductor. These wonderful, silicon-based doodads are spread across roofs around the world. But what in the world is a semiconductor? That is something the average solar enthusiast can’t exactly answer. Let’s not be too hard on ourselves, most of us couldn’t design a light bulb either. But, because rabid curiosity hasn’t killed me so far, I ventured to find out exactly what a semiconductor was. Here is what I found out…as best as I can articulate it.

Two things right off:

  • One, semiconductors are not exclusive to solar. They are also used in electronics, a big reason for the recent silicon shortage.
  • Two, they are not exclusively made from silicon, although it is still the most common. Other materials, such as cadmium telluride and copper indium diselenide, are also used but to lesser efficiencies so far.

Essentially, semiconductors are the devices in a solar cell that absorb sunlight and enable the separation of electrons from the heat waves. Only when electrons are freed can they be used to generate electrical currents. Hence you have the importance of semiconductors in solar cell manufacturing.

A semiconductor has two traits that are important to the production of electricity: (more…)

Semiconductors: The Science Behind Solar

Retrofit Solar Thermal Systems: the Cost-Effective Choice

ApricusSolar thermal systems are, in general, the most cost-effective choice in solar home systems. Whether used to heat water or to heat the home, up-front costs are cheaper than PV and, because heating space and water uses a lot of energy, returns are faster. But among solar thermal systems, what is the most cost-effective choice? Surprisingly, retrofit systems take the cake in that regard. In an interview with CalFinder Solar, Mick Humphreys, founder of Apricus, pointed out that retrofit solar hot water systems are typically cheaper because they can be integrated into the existing system.

This makes sense. Solar hot water systems can usually take advantage of much of the existing equipment and plumbing. In fact, a new tank may not even be needed. A solar hot water system can be as cheap as $2,000 but can rise as high as $6,000. Much depends on your home’s existing system. Regardless, given that water heating is second only to space heating in home energy consumption, and given state and federal rebates, there is not much waiting for the cows to come home, so to speak. (more…)

Retrofit Solar Thermal Systems: the Cost-Effective Choice

Going Solar in Vermont is about to Become Profitable

vermont-home-solar-power

In Vermont’s state legislature, a bill is under consideration that will help owners of residential solar photovoltaic (PV) systems put more green into their pockets.

It’s not a rebate or an incentive program to reduce installation costs, but a change to net-metering policies–a change that can reap substantial savings for Vermont residents.

For pricing on a home solar system, click here.

What Is Net Metering?

When a grid-connected, residential solar system generates more electricity than the home is currently using, the home’s electrical meter literally spins backward, sending the surplus energy back into the electrical grid. In many states, the customer then gets a credit for that energy on the monthly electrical bill.

Net metering is one of the primary reasons that going solar has become so affordable. Even with a small home solar system, there are periods of the day when it will generate more energy than the home needs. When that excess electricity is credited to a home energy bill, it cuts down on the costs of the conventional energy that a homeowner may need to supplement the PV system.

Why is Vermont’s Net Metering Policy Changing?

Across the nation, public utilities are mandated to invest in renewable energy. Many utilities partially meet these mandates through net metering, but states are allowed to dictate the percentage of solar-generated electricity that utilities credit their customers. Last year, Vermont raised the cap on the amount that utilities can get from net-metered PV systems to 4 percent.

This, along with Vermont solar rebates, was good news for residents, but the new law restricted the size of eligible solar panel systems to only 5 kilowatts. In Vermont, the average home PV system is around 7 kilowatts, leaving most homeowners ineligible to take advantage of the extra savings without undergoing a taxing application process.

House Bill 475, which just passed in the state’s house of representatives, allows for a simple application process for PV systems sized up to 10 kilowatts. Best of all, the bill also credits customers with home solar systems more money per kilowatt hour for surplus electricity. The bill must still pass the state’s senate.

What About Other States?

Almost every state has programs in place that garner extra income for PV system owners. In many areas of California, for example, net metering savings can be augmented by taking advantage of tiered and time-of-use (TOU) rates. Tiered rates are those that rise as the customer uses more energy. TOU rates increase during peak-demand periods. Home PV systems typically generate enough electricity to keep customers in the lower, base rates.

Other states like New Jersey award home solar system owners a Solar Renewable Energy Credit (SREC) for each megawatt-hour of electricity that their systems produce. New Jersey SRECs are currently selling for $675 each.

Cutting installation costs through rebate and incentive programs is only the beginning of solar savings. Programs like net metering not only offer ongoing savings for homeowners, but decrease the payback period for their systems. Once that period is over, those savings become sheer profit.

For more assistance paying for a home solar system, check out solar lending programs, offered in Vermont and across other states as well.

Going Solar in Vermont is about to Become Profitable

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