Just saw this article this morning in the last days tweets & thought: This good news comes at a good time because my
NEW YORK CITY -- Germany will subsidize consumers' purchases of battery systems to store power from solar panels through a 25 million-euro ($32.6 million) program to promote wider use of renewable energy, according to the German Solar Industry Association.
The government will pay 660 euros a kilowatt of storage capacity under a program that begins May 1, the trade group said today in a statement. The systems will also stabilize the flow of electricity into the grid.
Storage is a policy-driven market, Brian Warshay, an analyst for Bloomberg New Energy Finance in New York, said today in an interview.
“I’d expect for the incentive, which is set at a pretty healthy rate for most systems, to be used up quickly,” he said.
Editor's Note: For more information about this subsidy and the energy storage market, see our recent in-depth articles here:
Solar Storage Market Set for Rapid Growth
March 28th, 2013
LONDON -- News that Germany plans to launch a €50 million solar storage incentive is the latest indicator that solar storage's time has come.
Under the program, German owners of solar systems with storage will be entitled to a low-interest loan from KfW, the state-owned bank, and a repayment allowance from the Ministry of Environment, which will cover 30 percent of the battery system's cost. The program will apply to newly-installed PV facilities with storage and solar plants with storage systems installed after December 31, 2012. Systems under 30 kW will be eligible for the subsidy.
Although lack of emissions trading revenue for the Energy and Climate Fund is said to be currently delaying the program, it is predicted that it will soon move forward, possibly by the originally specified date of 1 May.
This incentive will make almost any emerging energy storage technology capable of tying into a PV array cost-effective, according to Brian Warshay of Lux Research. Subsidizing a storage system's energy capacity rather than its power capacity, as does California's Self Generation Incentive Program (SGIP), is a more logical approach, says Warshay, because the solar shifting application requires more energy than power. Germany's incentive will benefit technologies capable of longer discharge duration such as molten salt and flow batteries rather than most lithium-ion batteries, Warshay said.
Research firm NanoMarkets believes the growth of the solar storage market is driven by declining costs for PV modules and reductions in government support for solar power. Without attractive subsidies, self-consumption can be more valuable than selling power and storage becomes desirable. NanoMarkets predicts that demand for storage in the residential and commercial sectors will soon show rapid growth.
A Growing Need
According to IMS Research's recent survey of over 400 purchasers of PV inverters including distributors, installers, integrators, EPCs and wholesalers, the need for energy storage in solar systems is growing fast. Although energy storage is still a young market, nearly one third of respondents said they expect to be using storage in over 40 percent of the PV systems they install by 2015.
Survey respondents from Germany, Italy and the UK identified energy storage as more critical than any other requirement for future PV inverters. When IMS asked what the main driver for the adoption of energy storage would be, the most common response was a reduction in battery prices helping to drive system prices down and make storage financially viable.
IMS found that over 60 percent of respondents believed that an acceptable increase in system price for the inclusion of energy storage would be between 10 percent and 29 percent; however, almost 30 percent of respondents indicated they would be willing to pay even more.
Grid Benefit
According to the 2013 Storage Study from the Fraunhofer Institute, carried out for German solar trade body BSW-Solar, battery storage systems used in conjunction with a PV system can increase the absorption capacity of existing power grids by up to 66 percent.
“The positive effects that decentralized photovoltaic battery systems have on the power grid cannot be overstated,” said Dr Christof Wittwer, head of the Intelligent Energy Systems department at the Fraunhofer Institute for Solar Energy Systems.
“The success of the Energiewende depends on the use of solar batteries as grid-assistive short-term storage capability,” said Jörg Mayer, managing director of the German Solar Industry Association. “What we need now is the initial spark for the development of decentralized battery storage systems, so that we can quickly achieve progress in terms of technology, and above all in terms of costs. With an increasing production of batteries, solar storage systems will quickly come down in price, thus enabling savings in grid expansion.”
Move Fast
Nanomarkets' report entitled Storage 2013 predicts that the global market for solar storage systems will be worth US$2 billion by 2018. Dr. Eicke Weber, head of the newly-established German Energy Storage Association, has called this a “conservative estimate”. Italian energy consultancy BIP said the battery market will reach at least 9 GW of capacity by 2020 from today's 270 MW.
And the commercial sector's uptake is growing in line with the residential sector's. Nicola Cosciani, head of energy storage at Italian industrial battery maker Fiamm, says heavy power users such as cement and steel makers are looking at solar storage. “Germany and Italy will be explosive markets for residential storage and big energy users are also starting to show an interest. This is a game changer,” he said in a Reuters interview.
When implemented, Germany's incentive will result in a short but rapid boom in distributed storage, Warshay predicts. “Developers with any hopes of addressing this market opportunity will need to move quickly into Germany to establish partnerships that will help decipher the bureaucratic requirements necessary to benefit from this new policy,” he said.
Technology growth
Considerable technological innovation is expected in energy storage, yet traditional lead-acid batteries will be the main revenue generator over the next decade, accounting for more than $950 million in revenues in 2018, research firm Global Information (GI)'s Solar Storage 2013report has found. Lead-carbon technology will improve the margins on this type of battery, generating another $135 million by 2018, the report said.
There is also growing interest in the use of lithium batteries in the solar sector; GI expects these batteries to generate $235 million by 2018. Chinese solar energy storage firms seem likely to focus on lithium batteries since China is a major source of lithium. "
Energy Storage Series: Why We Need It, And Why We Don't
April 4th, 2013
New Hampshire, USA -- It's almost a cliché that there's a "friendly debate" pitting utilities against renewable energy. But concerns on the utility side of the table are real: intermittency, potential destabilization at the feeder level, non-baseload, and peaks in generation that don't necessarily match demand peaks. Today's power infrastructure involves unpredictability in both supply and demand that is extremely difficult to manage. The choice comes down to two options: over-generate so as to not undersupply, or find ways to better match up supply and demand.
"To balance the grid and keep it in a stable condition, you're going to need energy storage," said Doug Staker, VP of business development for Demand Energy. "Every customer interaction, every presentation, one question I'm getting now: what can you do to help me with storage?" He said there's a "huge lack of information and education" about whether energy storage is ready and in what form (e.g. which technology to use, and whether it's centralized vs. distributed) "People really want to understand how to integrate energy storage into a variety of applications."
As more renewable energy comes into the power mix, "high-response energy storage seems to be the way," added Chris Wheaton, CFO of Energ2. "We think storage is an equivalent leg of the chair" alongside solar and wind energy generation.
"In general energy storage is a good thing — except that it is not cost-effective for bulk energy storage," counters Mahesh Morjaria, VP of PV technology applications at First Solar. If the goal is to manage variable energy generation, Morjaria suggests, then the whole grid can act as energy storage, if managed properly. "When part of the resource is not available or generating, other resources are able to provide the load," Morjaria said. "That's the beauty of it, in a more cost-effective manner." Storage too can provide grid flexibility, agreed Morjaria, but it's simply not yet cost-effective enough.
What's It For?
Discussing large-scale energy storage depends on what problems are being solved. "People forget what energy storage is: an enabler," explained Erick Petersen, VP of marketing at Demand Energy. It's not that grid-scale energy storage *can't* be deployed — it's a question of what do you want do with it, whether it's achieve true grid stability, or flatten loads to reduce peak congestion, or provide ancillary services. "The benefits stack up the highest as you move the edge of the grid," he said. "People get lost in the debate whether it should be grid-scale, which battery is right — the answer is, 'All of it,' depending on the problem you're trying to solve."
Reliability and Flexibility
Germany is widely accepted as having a much more robust incorporation and management of renewable energy generation. But even there, many believe the nation's energy overhaul means storage is a matter of not if but when. Wheaton thinks "the jury's still out whether Germany will have an energy storage program." Rick Luebbe, CEO of Energy2, points to a Sandia Labs calculation that problems start emerging at a 20 percent renewables mix at which point storage has to enter the discussion.
Germany has been able to accommodate roughly 22 percent of a renewables mix, mostly variable wind and solar — and they're doing it by leveraging flexibility in their grid "without going out and acquiring a whole bunch of storage," Morjaria points out. Similarly, California's 33 percent renewables target won't rely on building massive amounts of bulk energy storage. In both cases, "they're figuring out other ways to achieve grid flexibility," he said.
In California the difference between trough and peak load on a summer day can be 20 gigawatts, Staker pointed out. "People talk about the [grid] having flexibility and capability to absorb excess generation — and that's true," he said. "But more system saturation becomes more problematic," once you have to start doing things like firming up wind power with gas peakers that by definition want to run in a steady-state condition and not vary up and down to plug intermittent gaps.
Demand Response
"Demand response has been the cure-all for all kinds of system challenges," Staker said. He recalled an effort from Baltimore Gas & Electric with a demand/response plan to reimburse customers for turning off their air conditioners for a few hours during critical peak events. But the system was one-way and radio-based, and closed-loop — no way to really know who responded. So an urban secret spread: wrap your AC in tinfoil to block the signals, and cash in the reimbursement. That, he said, illustrates a problem with demand/response: "at the end of the day, customers can just opt out."
If response time is the target, hydro and possibly compressed air make sense, balancing on a 24-hour cycle, says Luebbe. But either of those options are selective based on geography. For shorter-timeframe needs, electrochemical storage comes into play, with multiple technologies to choose from (lead/acid, lithium-ion, flow, molten, ultracapacitors, hybrid configurations). For balancing solar power into a facility or a grid, lead-acid batteries "will probably be just fine," he said, while flow and molten batteries will emerge at point-of-use to balance intermittent power from a local grid (e.g. cell-phone towers).
Still, Morjaria thinks the costs for energy storage still aren't low enough to make it feasible for this time-shifting. Even if there's a significant difference in the cost of every kilowatt-hour that can be fed into and pulled out of the grid, adding costs associated with energy storage eliminates those potential gains. "In California they're talking about PPAs on the order of $85/MWh [$0.08/kWh]. That's what they expect from solar energy," he points out. (Note that a recent deal in New Mexico was for less than six cents/kWh, and ironically for a First Solar project.) Storing energy and pumping it out adds to that cost — Morjaria ballparks it at $0.20/kWh — which quickly snuffs out any price arbitrage.
Frequency Regulation
Morjaria did acknowledge one area where energy storage is indeed viable: frequency regulation. Constantly adjusting power input to offset increased/decreased demand and keep frequency constant, responding very fast with charging and deploying energy in very short cycles — "that's where energy storage has an interesting role to play," Morjaria said. A123 and Beacon Power have explored that in NY ISO and other places, FERC has tweaked regulation to support it, and "it seems to be making some sense," Morjaria noted. But that isn't necessarily a practice that depends on variable generation from renewables.
Frequency response can stretch out some power output at the expense of some quality, but power coming from renewable sources "is simply not high enough for most independent power producers and transmission to handle," said Chris Wheaton, CFO of Energ2.
What It Costs
The big question in energy storage, Wheaton says, boils down simply: what does it cost to build more generation (to oversupply), vs. how to store and manage energy? Today it's more "economically rational" to build more generation, whether it's solar or wind or even coal, he noted. As energy storage technology costs come down — and as there is better understanding and calculation of externalized costs, such as societal impacts — "we will see those lines cross, and more utilities will go to energy storage as a more economical means to serve the grid."
Fundamentally, economics determines the decision of over-generation vs. energy storage; right now "either energy storage is not cheaper, or the payback is not enough to shift over," noted Luebbe. As the cost (dollars per kilowatt-hour) come down and energy storage costs intersect with those in over-generation, "then everyone will do it because it's economically the logical thing to do."
Part of that economic determination, Luebbe says, has to define, manage and regulate the externality of emissions. That will play out differently in different countries and economies, he noted — how will many countries hit the Kyoto Protocol targets without big changes to grid infrastructures, and how is oxygen interpreted as contributing to emissions calculations. Even the presence of some pilot stage energy storage projects "tells me we're pretty close" to that cost intersection, Luebbe said. "
Source:
Renewableenergyworld.com
