Why Every Rooftop Solar System Needs Energy Storage

John Petersen for Investor Intel:  Rooftop solar is an odd duck. A consumer buys an expensive capital asset with the expectation that he’ll recover his investment through lower electric bills. As a matter of metaphysics, he’s decided to go into the power business with the primary goal of satisfying the most important and discriminating customer on the planet. The value proposition he currently offers his local electric utility is:

  • I’ll buy less electricity from you because of my solar panels, but I need you on standby 24/7 to supply my nighttime needs and fill any weather related power production gaps;
  • Since my solar panels will frequently produce more power than I need, I want you to give me credit for any excess power production, let me draw equivalent power from you when I need it, and structure it all as a tax free swap;
  • You can, of course, bill me for any difference between what I deliver and what I take;
  • I’ll have no duty to buy a fixed amount of power from you or deliver a fixed amount of power to you, but you must supply whatever I need and take whatever I don’t need; and
  • You will be required to pay all of the costs associated with weather related production gaps and pass those costs through to your other customers.

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24M's Batteries Could Better Harness Wind and Solar Power

Elizabeth Woyke for MIT Technology Review:  Lithium-ion batteries power everything from smartphones to electric vehicles. They’re well suited to the job because they are smaller and lighter, charge faster, and last longer than other batteries. But they are also complex and thus costly to make, which has stymied mass adoption of electric transportation and large-scale energy storage.
Yet-Ming Chiang thinks his startup 24M has the answer. The key is a semisolid electrode. In a conventional lithium--ion battery, many thin layers of electrodes are stacked or rolled together to produce a cell. “Lithium-ion batteries are the only product I know of besides baklava where you stack so many thin layers to build up volume,” says Chiang, who is a cofounder and chief scientist at 24M as well as a professor of materials science at MIT. “Our goal is to make a lithium-ion battery through the simplest process possible.”  Cont'd...
 

Virtual Power Plants Get Around Solar Power's Intermittency Problem

Richard Martin for MIT Technology Review:  Attempting to harness the power of distributed rooftop solar installations to make its grid more flexible and reliable, New York utility Consolidated Edison is launching a pilot program this summer to link dozens of small solar arrays into a single, software-connected power plant. The utility is working with solar power developer SunPower and energy storage company Sunverge to create a “virtual power plant”—a network of distributed assets that functions as a unified resource on the grid.

The project will include 300 homes with a combined total of 1.8 megawatts of solar capacity and batteries that can store up to four megawatt-hours of electricity, enough to run 300 average U.S. households for about 10 hours.  Cont'd...

Iron Edison Battery Company CEO Speaks at Next-Generation Energy Storage Conference

Iron Edison's new Lithium Iron battery systems are ideally suited for solar, residential and commercial energy storage

WattJoule Develops Cost Breakthrough for Liquid Energy Storage

WattJoule Corporation, a developer of next-generation liquid electrical energy storage systems, has developed and built a new system demonstrating a major industry cost breakthrough. The new storage platform is called ElectriStor™ and will be offered to system integrators as the preferred core component for storing large amounts of solar and wind energy. 
One of the major barriers preventing the widespread adoption of large-scale energy storage has been cost. WattJoule has engineered the ElectriStor™ platform based on the redox flow battery concept where electricity is stored in a liquid. WattJoule's proprietary liquid electrolyte is mostly water, and the company has developed a new, inexpensive process to make it in large quantities. Early liquid energy storage systems have suffered from a number of technical and cost limitations. Recently there have been several technical breakthroughs to overcome these constraints. WattJoule has both developed and exclusively licensed key technologies that, in combination, dramatically lower energy storage costs to $150 per kilowatt-hour in its first-generation energy storage product.   Full Press Release:  
 

Two-thirds of US solar installers do not offer storage, study finds

Ian Clover for PV Magazine:  A study by EuPD Research shows just 34% of PV installers in the U.S. offer storage solutions to customers, with those reluctant to do so citing cost concerns. However, 26% that currently do not offer storage hope to include it in their portfolios this year.

For all the glitzy product launches by the likes of Tesla and Sonnen, the solar+storage landscape of the U.S. is still largely shaped by what leading installers are – or aren’t – prepared to offer to customers, and a recent survey has found that around two-thirds do not currently include storage technology in their product portfolio.

EuPD Research’s latest PV Installer Survey USA 2015/16 revealed that only one-third of installers already offer energy storage to homeowners or businesses in the U.S. looking to adopt solar power. Of the two-thirds that do not, 38% said that current pricing of batteries impedes demand, meaning margins are too low for installers and the "technological maturity" of the systems on the market is not currently convincing.

However, the mood does appear to be shifting in favor of storage, with 26% of survey participants saying they hope to add storage products to their portfolio at some stage in 2016.  Cont'd...

These Lego-Like Batteries Plug In To Store Solar Power At Home

Adele Peters for Co-Exist:  Less than a year after Tesla unveiled its Powerwall battery for storing electricity at home, a startup has designed a much cheaper alternative that you can plug in yourself, without an electrician.

The modular batteries, called Orison, can be hung on the wall or set on the ground to double as an LED lamp. If you want more power, you just add the units together.

"Think of Orison like Legos," says co-founder and CEO Eric Clifton. "The 2.2 kilowatt-hour unit is really just one piece, so you can actually add as many as you need." The 2.2 kilowatt-hour version is as large as the company could make one unit and keep it under 40 pounds, so it could be easily shipped and moved.

With one unit, if your power went out in a storm, you could keep an energy-efficient refrigerator running for about two days. If you want to back up everything in your house, you'd connect a long series of batteries together.

For someone with solar panels on the roof, the batteries can store power to use at night. Right now, most people can sell extra solar power back to the grid when they're not using it, but many state laws are about to change so people will make less money. Batteries can help solar homeowners save money by making use of the power they've generated.  Cont'd...

JuiceBox Energy and ReVision Energy Install Innovative Solar Energy Storage Technology at Historic Maine Library

JuiceBox Energy, a privately-held Silicon Valley company committed to providing safe, reliable, intelligent, and connected energy storage, and ReVision Energy have embarked upon a unique installation of an 8.1 KW solar panel array and an innovative energy storage system at the Charlotte Hobbs Memorial Library in Lovell, Maine.

Apple leftovers key for future energy storage

By Tereza Pultarova for E&T:  German researchers have developed a new carbon-based active material that can be manufactured from apple leftovers and used to build better energy storage systems.

The apple-based material can be used as the negative electrode in sodium-ion batteries, which are currently being researched as a more environmentally friendly and cheaper alternative to lithium-ion batteries.

Instead of energy-intensive lithium mining, which frequently damages the environment, battery manufacturers in future could be using organic waste to make batteries.

In tests, the new material discovered by researchers from the Helmholtz Institute Ulm of Karlsruhe Institute of Technology, has demonstrated ‘excellent electrochemical properties’, allowing the researchers to carry out 1000 charge and discharge cycles during which the apple-based battery demonstrated high stability as well as capacity.  Cont'd...

JuiceBox Energy and Simmitri Offer Energy Storage Innovation to Silicon Valley Solar Customers

JuiceBox Energy, a privately-held Silicon Valley company committed to providing safe, reliable, intelligent, and connected energy storage, and Simmitri Inc., a provider of sustainable energy solutions, have partnered to offer Silicon Valley customers the JuiceBox Energy storage system.

Smart Energy Storage System, sonnenBatterie, is ready for Hawaii with HECO Approval

The sonnenBatterie, one of the world's most popular residential storage systems, is officially install-ready in Hawaii after meeting the advanced energy storage requirements from the Hawaii Electric Companies (HECO). First installers already partnered with award winning, smart lithium storage system

SolarWorld Partners with sonnen to Launch Energy Storage Solutions

Company sees storage as key component in next phase of solar-industry growth

Europe's First Commercial Battery Will Also Provide Black Start Capability

One battery to do it all: demonstration of additional commercial use case / First stationary battery storage system to restore grid after blackout

Sprig Electric Pioneers a One, Two Solar Punch in Silicon Valley to Dramatically Reduce Energy Costs

Sprig Electric is now among the first electrical contractors in the nation to pair Tesla's Powerpack battery with a 350 kW commercial rooftop photovoltaic (PV) system to optimize energy savings.

Saft lights up Champ de Mars in Port-au-Prince with lithium-ion energy storage system

Lithium-ion Energy Storage System (ESS) powers lighting and Wi-Fi for historic public square. • Intensium® Max 20E energy battery container combined with solar panels. • First photovoltaic plant developed in Haitï is model for other island grids.

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