Using Y Connectors in String Inverter Systems: Part I
In Part I of this blog post Eric Every, Yaskawa - Solectria Senior Applications Engineer, explores cases in which PV system designers should use Y-connectors, what the code implications may be, how they may be used with internal inverter combiners.
Siemens unveils new hot rocks energy storage system
Jocelyn Timperley for BusinessGreen: A new energy storage technology currently under development by Siemens is set to see excess wind energy converted to heat rocks, allowing the energy to be stored using an insulated cover.
The system consists of a fan that uses an electrically-heated air flow to heat the stones to high temperatures, with the thermal energy then converted back to electricity when needed using a steam turbine.
The simple principle of the set-up promises to deliver a low-cost way of storing energy, Siemens said, with the only limit to the concept being the space required for the rock-filled insulated container. Cont'd...
Small Power, Big Grid: Part 1
This series will focus on these questions in the area of transmission planning (regional load forecasting and solutions to identified grid needs), wholesale market design, and facilitation of utility business model reform.
New solar panel integrates battery storage, inverter, and smart software into a single unit
Derek Markham for TreeHugger: This startup is reinventing the solar panel, and aims to cut the cost of integrating clean power and energy storage to homes by half.
Home solar has the potential to reduce, and even eliminate, electricity costs for many people, but even with the rapid advancements we're seeing in solar technology, there are still weak points that can be addressed and overcome, such as energy storage and 'smart' home integration. But a newcomer to the residential solar scene believes it has the answer, in the form of a standalone solar and battery unit which can be used singly or connected in an array, and which may be able to lower the overall costs considerably.
SunCulture's SolPad solar device integrates solid state batteries directly into the solar panels themselves, offering its users the ability to not only generate their own clean electricity, but to also store if for use after dark or during peak demand times, when electricity costs are higher. The SolPad units also incorporate an inverter, which converts the electricity from the DC generated and stored by the device to the AC required by most household appliances, and includes "intelligent software" that communicates with both the users and with their home's systems, allowing for granular control over which rooms or devices will receive the solar power. Cont'd...
Full Press Release:
The Future of Bio-Inspired Batteries
A major advantage that bio-inspired batteries have as compared to other batteries is their ability to allow an instant recharge.
Tesla Wins Large Contract with Utility for Energy Storage
Jon LeSage for HybridCars: Tesla’s energy storage division just won a very large contract with a major California utility to stabilize power outages.
While the acquisition cost hasn’t been announced, Tesla Energy will supply 20 megawatts of energy storage to Southern California Edison – enough to power about 2,500 homes for a full day. It’s part of SCE’s efforts to prevent blackouts by fossil-fuel electricity generation with lithium-ion batteries. Investment in Tesla’s product, called Powerpacks, is thought to be worth tens of millions of dollars, and is expected to be operational by the end of this year.
The deal ties into Tesla’s plans to broaden its base beyond manufacturing and selling electric cars, similar to its recent investment in SolarCity. It also signifies advancements being made in energy storage, which is reaching a much faster pace – months instead of years, according to an analyst. Cont'd...
SunPower Embraces Drones and Robots to Help Evolve Its Solar Farms
Katie Fehrenbacher for Fortune: Solar panel maker and farm developer SunPower is embracing the latest in computing technology to help lower the cost of its solar panel farms while minimizing the impact that the farms have on land.
The Richmond, Calif.-based company on Tuesday announced an array of new technology that it’s using to design, build, operate, and monitor big solar panel farms that are built to sell energy to utilities and large companies. Cont'd...
Read Press Release:
New technology puts solar power to work all night long
ScienceDaily: Energy storage is crucial for taking full advantage of solar power, which otherwise suffers interruptions from cloudy skies and nightfall. In the past few years, concentrating solar power plants have begun producing additional electricity at night and during peak demand periods by using stored heat energy to propel a steam turbine.
Current thermal energy storage systems rely on materials that store less energy per kilogram, requiring more material at a greater cost to meet energy storage requirements.
Now, researchers at the U.S. Department of Energy's (DOE's) Argonne National Laboratory have designed an inexpensive thermal energy storage system that will be significantly smaller and perform more than 20 times better than current thermal systems. Cont'd...
Alternative Energy Project Financing
If storage costs can demonstrate price reductions comparable to what weve experienced with wind and solar, storage will be a big part of the story.
Special News Report for Solar Power International 2016
New product announcements and news from SPI 2016. Post your company news or read about what others are doing at the show.
Batteries Get a Boost From California Utilities
If we stop and take a critical look at the fragility of our energy supply system, we see that it could be strengthened by distributing energy generation and storage. This means its not just the utility companys job to store energy… its everyones job.
Making waves: Shetland tidal power breakthrough is another world first for Scotland
Martin Hannan for The National: HOUSEHOLDERS on the Shetland Isles were not aware of it, but when they plugged in their kettles recently, they were sharing in a bit of history.
For the Shetland Tidal Array at Bluemull Sound, installed by Nova Innovation of Edinburgh, has become the world’s first tidal power array to be connected to a grid and deliver power on a commercial basis – to dozens of homes on the islands.
The achievement has been hailed by environmentalists and the renewable industry as a turning point in the development of marine power.
Nova had shown its technology could work with a single turbine which generated electricity in March. But the installation of second turbine that is also working to the grid proves that large tidal power arrays can and do work. Commercially viable tidal power is seen as something of a Holy Grail by the industry, since it is one of the few renewable energy sources that is entirely predictable – as one industry source once put it: “there will be tidal power available as long as the moon is in the sky”. Cont'd...
Energy Storage North America Announces Innovation Award Finalists
Winners for each category will be determined by the ESNA Advisory Board (50%) as well as public voting (50%).
Could A Lithium Shortage De-Rail The Electric Car Boom?
Lithium has the purest of fundamentals of any 'commodity' out there, and the next oil barons look set to actually be lithium barons.
'Ideal' energy storage material for electric vehicles developed
Walt Mills for Phys.org: The energy-storage goal of a polymer dielectric material with high energy density, high power density and excellent charge-discharge efficiency for electric and hybrid vehicle use has been achieved by a team of Penn State materials scientists. The key is a unique three-dimensional sandwich-like structure that protects the dense electric field in the polymer/ceramic composite from dielectric breakdown. Their results are published today (Aug. 22) in the Proceedings of the National Academy of Sciences (PNAS).
"Polymers are ideal for energy storage for transportation due to their light weight, scalability and high dielectric strength," says Qing Wang, professor of materials science and engineering and the team leader. "However, the existing commercial polymer used in hybrid and electric vehicles, called BOPP, cannot stand up to the high operating temperatures without considerable additional cooling equipment. This adds to the weight and expense of the vehicles." Cont'd...
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