News: Energy

With Tesla ramping the production of its residential battery and solar products, Solar Roof installations are bound to become more commonplace. Being a new type of PV system, Tesla’s solar shingles could provide challenges to emergency personnel and first responders who are not trained to handle the glass tiles. The California Department of Forestry and Fire Protection, better known as CAL Fire, recently released a video demonstrating techniques on how to best respond to a home fitted with a Tesla Solar Roof installation.

CAL Fire veteran Brock Archer noted that the construction of the Tesla Solar Roof is actually pretty simple, with the photovoltaic cells being mounted on top of a firestone clad guard, which is a thin moisture barrier. The wiring for the tiles themselves is hidden underneath the shingles. Archer further stated that each Solar Roof tile represents itself as three shingles on the roof. As per Tesla’s design, one to four of these tiles can be wired together to create branches, which are then wired to a diode trunk harness. The diode trunk harness carries the electricity from all the panels through the roof itself.

Archer further noted that while the diode trunk harness operates at a high voltage, testing on the Solar Roof system indicates that there is almost zero risk of shock or electrocution when cutting or crushing the tiles. There is also almost no risk of electric shock when cutting through the diode trunk harness. A rapid shutdown device that’s installed close to the solar arrays, terminates DC power in the roof when AC power is interrupted.

A Tesla Solar Roof installation. [Credit: E for Electric/YouTube]

A Solar Roof tile installation on a residential unit. [Credit: @Toblerhaus/Twitter]

While Tesla’s glass solar roof tiles are designed to be nearly indestructible, conducting emergency extrication maneuvers through the photovoltaic system could prove tricky. Fellow CAL Fire veteran Nick Papa noted that the Solar Roofs are very slippery, and are best treated like metal and slate roofs. Thus, for firefighters and other emergency personnel, using a ladder to gain access to a Solar Roof-equipped house is necessary. The fire veteran also noted that the tools such as fire axes and chainsaws work well with the Solar Roofs, as the shingles could be removed quickly without any problems.

The recently released emergency response training video for Solar Roof installations ultimately showcases the clever design of Tesla’s next-generation PV system. When Elon Musk unveiled the Solar Roof tiles back in 2016, Musk highlighted the shingles’ aesthetics and durability. If this recent video is any indication, it seems like the Solar Roof tiles are also designed with safety in mind.

In a recent statement, Tesla CTO JB Straubel noted that the company is aggressively ramping the production of its residential solar and battery products. Despite increasing competition from other residential solar companies in the United States, Straubel stated that Tesla is in no way stepping back from the residential solar industry. The Tesla CTO also noted that production of Powerwall 2 home batteries is set to ramp later this year. Solar Roof tile production is also expected to hit its full stride in 2019.

Watch emergency response techniques for the Tesla Solar Roof in the video below.

To learn more about how you can eliminate your energy bill through solar, we’ve partnered with the team at UnderstandSolar, an affiliate of ours that aims to customize the perfect solar system for you based on your location and property size.

Details from Tesla’s new patent suggests that the company is coming up with a way to make its battery packs safer. Using what the electric car and energy company describes as an “Energy Storage System,” Tesla would be able to isolate damages caused by failed battery cells, saving functional cells in the battery pack.  

The patent, which was published today, listed an international filing date on January 10, 2018. Tesla noted in its patent that battery cells generate heat during both charging and discharging. When cells fail, the individual units typically release hot gases that could negatively affect the integrity of nearby cells. This usually results in functional cells being damaged as well. Tesla’s patent describes the use of two interconnects that would be positioned over the multiple battery cells. Multiple first cell connectors connect the positive terminal of the battery cells to the first interconnect, while multiple second cell connectors connect the negative terminal of the battery cells to the second interconnect. A top plate with an interior and an exterior side is placed over the first and second interconnect. An illustration of this could be found below.

An exploded view of the energy storage system, according to certain embodiments of the invention. [Credit: Tesla]

This top plate includes one or more weak areas above one or more battery cells. These weak areas are designed to rupture when failed battery cells release heat and build up pressure. Tesla’s patent notes that these weak areas could be chemically weaker when exposed to the caustic gases released by failed battery cells. By adopting this system, Tesla would be able to contain the damage from failed cells to a specific section of the battery pack, saving the integrity of functional battery cells. Tesla elaborates on this process in its patent.

“During operation of the energy storage system, the battery cells generate heat. The system may include features or material to thermally insulate the battery cells from the heat generated by other cells (and/or other electrical components), such as a polymer-based insulating material or another type of insulating material. The system may also include features, such as a cold plate or heat pipes, to remove heat generated by the battery cells during operation of the energy storage system. The features or material to perform this electrical insulation may include the interstitial material or a sleeve, as further described below. In alternate embodiments, an air gap may provide the necessary electrical isolation.

“Further, the battery cells may fail and discharge its contents as hot gases that are caustic to the other battery cells and other portions of the system. The energy storage system may include features or material for directing the hot-gas discharge during failure of a battery cell. In certain embodiments, the features or material for insulating the battery cells from heat generated by other battery cells (and/or other electrical components) and the feature or material that directs the discharge of the hot gases during battery cell failure may be the same. In other embodiments, separate features or materials may both insulate a battery cell from the other battery cells and also direct the discharge of any hot gases.”

Tesla’s new patent is yet another sign that the electric car maker is pushing innovation despite the company’s lead in battery technology. Tesla’s 2170 cells, which are fitted on the Model 3’s battery pack, have garnered widespread acclaim from industry experts such as Sandy Munro of Munro & Associates, who dubbed the cells as the best batteries in the world to date. In his conclusion to a thorough teardown and analysis of the Model 3, Munro noted that he was impressed with Tesla’s new 2170 batteries. Munro further stated that after tearing down the electric car, he now believes that Tesla is far above other battery manufacturers such as Samsung and LG in terms of technology.

“This is the new cell. This is called the 2170. It’s a little bit bigger; 20% bigger than the old one. It has new chemistry, and quite frankly, it gives you 50% more power. Twenty percent bigger but 50% more power. I’m pretty happy with that,” Munro said. 

Battery packs are at the core of Tesla’s business, with batteries powering both the company’s electric car and energy storage systems. With Tesla ramping its efforts on both fronts, it is imperative for the company to ensure its lead in the battery industry. With safer battery packs, Tesla can continue saturating both the auto and energy market with the added assurance that its batteries are as safe as they can be.

Tesla’s new patent for its Energy Storage System could be accessed in full here.

The island nation of Samoa is continuing its effort to convert from diesel-reliant powerplants to 100% renewable energy with the help of Tesla’s scalable Powerpack battery storage solution. Over the past year, the California-based electric car and energy company had been hard at work installing and launching two Tesla Powerpack sites in the country, both of which are designed to capture the abundance of renewable energy, otherwise lost without a means for storage, and offer grid stability to local utilities.

Tesla Powerpack installations at the Fiaga Power Station and the Faleolo International Airport are integrated with 13.6 MWh of energy storage for the island’s solar, wind, and hydropower farms. The entire system is optimized by Tesla’s Grid Controller, which gives the country real-time control over grid stability, reliability, and security. In a statement to the Samoan Observer, Samoa Prime Minister Tuilaepa Sa’ilele Malielegaoi noted that the utilization of Tesla’s battery storage system has helped the country provide additional stability to its power grid.

“Without the new battery energy storage systems and microgrid controller, the system will not be able to operate efficiently with such a high percentage of solar penetration in Samoa of 55%. Since the batteries have been running on trial tests, the quality (voltage and frequency) of the electricity supply has been very steady and not fluctuating as before,” he said.

Tuilaepa further stated that Tesla’s battery storage system, together with the country’s ongoing renewable energy projects, would ultimately allow Samoa to power itself on 100% renewable energy by 2025. Over the years, the state has been pushing clean energy solutions to its power system, and between July 2017 to June 2018 alone, 48% of the electricity in Samoa was generated from renewable energy systems. Ultimately, Tuilaepa expressed his thanks to Tesla, which was awarded the project back in 2017, as well as other companies taking part in Samoa’s transition to fully renewable power.

Samoa’s transition to clean energy is a classic example of an island nation relinquishing old, costly systems and embracing newer, more environmentally-friendly solutions. The country imports millions of liters of oil every year, and in 2012, Samoa ended up importing 95 million liters (25 million gallons) of diesel to support its energy grid, particularly after it was ravaged by Cyclone Evan, which damaged the nation’s hydropower plants.

Tesla Energy might not incite as much news as the company’s electric car business, but projects involving solar and battery installations across the world have continued to grow at an exciting pace, providing disaster relief and grid stability to areas prone to power outages and high energy costs. In a way, updates such as the Samoa Powerpack farm corroborate CTO JB Straubel’s recent comments about Tesla’s Energy initiatives and the company’s focus to ramp production of its Tesla Energy products, considering high demand from consumers.

Tesla’s Powerpacks and solar panels are proving to be incredibly useful for large-scale energy projects. In Australia alone, Tesla is involved in the creation of an enormous Powerpack farm in Victoria, as well as the first installations in its proposed 50,000 Powerwall virtual power plant in South Australia. Overall, the Samoa Powerpack installations stand as the company’s latest project situated on an island. Tesla, after all, is currently involved in thousands of energy projects in Puerto Rico, and it has also rolled out battery installations in islands such as Ta’u in American Samoa and Kauai in Hawaii.

Watch Tesla’s video on its Samoa Powerpack project below.

Amid rising competition in the residential solar market from rivals such as SunRun, Tesla CTO JB Straubel stated that Tesla is ramping up its efforts to bolster its energy business. According to Straubel, the reception of the public to products like the Powerwall 2 and Solar Roof tiles has been similar to the Model 3. Thus, Tesla is now doing what it can to increase its capacity to produce its energy products as fast as it can.

Straubel’s update to Tesla’s energy business came as a statement to USA Today, which recently published an article about the residential solar market in the United States. While the Tesla CTO did not provide the actual figures of its Powerwall 2 and Solar Roof reservations, Straubel did state that for now, Tesla is unable to keep up with deposits being put down for the products. Straubel also emphasized that Tesla is not in any way stepping back from the residential energy business.

“No one should see us as stepping back from solar. In fact, it’s the opposite. It’s like with Model 3. People have come flooding in and are waiting on the product. So now we’re aggressively ramping our capacity,” he said.

To address the demand for its residential products, Straubel stated that production of the Powerwall 2 is set to pick up later this year, while output for Solar Roof tiles is expected to accelerate in 2019. The Tesla CTO expects these initiatives to reduce the wait times for these energy products.

The Tesla CTO’s latest statement comes as an encouraging update to the company’s residential energy business, much of which has been under the news radar for most of the year. The first consumer installations of the Solar Roof began earlier this year, and reports emerged that Gigafactory 2 in Buffalo, NY is ramping up hiring, but apart from these, Tesla’s energy initiatives appear to be focused on large-scale industrial projects, such as its upcoming Powerpack farm in Victoria, and its virtual power plant in South Australia.

Tesla’s residential energy business in the United States took a blow last month, as well, with the company closing a dozen of its solar facilities across nine states in the country as part of its restructuring. Apart from this, Tesla also announced that it would not renew its partnership with Home Depot to sell its solar solutions and Powerwall 2 home battery storage units.

Regardless of these, the progress of Tesla’s industrial energy projects is indicative of the potential of its residential initiatives. Over the past year, after all, Tesla had all but proved that its battery technology is a feasible alternative to conventional power solutions. The warm reception to its big battery in South Australia, which continues to support the region’s embattled energy grid, is a testament to this.

Considering the competition from its local competitors, Tesla would have to increase its push for its residential energy business in the United States. Solar analyst for GTM Research Allison Mond, for one, stated that Tesla could see its market share shrink in the coming quarters due to competitors and the company’s lack of focus on its solar products. Nevertheless, Straubel stated that market share is not really Tesla’s focus for its residential energy business.

“We’re focused intently on the customer experience, not on having a higher market share. We’re looking at the bigger picture,” he said.

During Tesla’s 2018 Annual Shareholder Meeting, Tesla CEO Elon Musk mentioned that the company is getting closer to a battery breakthrough. Addressing shareholders, Musk stated that Tesla is on pace to hit a battery cell cost of $100 per kWh by the end of 2018 depending on the stability of current commodity prices. Considering Straubel’s mention of a ramp in Powerwall 2 production later this year, it seems like Tesla’s push into residential solar could happen just as the company hits a breakthrough in its battery technology.

A high-profile developer connected to Tesla’s solar factory in Buffalo, NY was convicted last Thursday of rigging the bids for several state-funded contracts worth hundreds of millions of dollars. During his sentencing last week, former SUNY Polytechnic Institute president Alain Kaloyeros was found by a Manhattan judge guilty of two counts of wire fraud and one count of wire fraud conspiracy.

Kaloyeros was, at one point, a prominent ally of New York Governor Andrew Cuomo. According to the U.S. Attorney’s Office for New York’s Southern District, the 62-year-old developer crafted contract-bidding documents to ensure that high-profile, taxpayer-funded construction projects were granted to two companies that have close ties with the NY governor. Among these is Tesla’s Gigafactory 2 facility in Buffalo, NY, which is tasked with manufacturing photovoltaic cells for the company’s Solar Roof tiles and solar panels. The Tesla solar factory contract was worth $750 million and is considered a centerpiece of the “Buffalo Billion,” a plan by the NY governor designed to push the city’s economy forward.

The contract for Tesla’s solar factory was granted to LPCiminelli, whose president, Louis Ciminelli, was also convicted on Thursday of felonies. Two other individuals,  Steven Aiello and Joseph Gerardi of COR Development were also convicted last week.

Prior to being dubbed as Tesla’s Gigafactory 2, the 1.2 million-square-foot factory in Buffalo began as a SolarCity facility that was to be used as a clean energy business incubation center. Construction for the factory began in September 2014 and completed in 2017. Development for the expansive facility was assigned to SUNY Polytechnic Institute, which was led by the now-convicted Kaloyeros. With the acquisition of SolarCity in 2016, the site eventually came to be known as Gigafactory 2.

RELATED: Tesla Solar Roof customer gives insights on cost and installation process

While Gigafactory 2 does not make the news as much as the company’s massive Gigafactory battery plant in Nevada, the site, nevertheless, has been quietly ramping its activities in preparation for mass production of Tesla photovoltaic cells. Back in January, the Trump administration announced that it would be placing a 30% tariff on solar system components that are imported abroad. In response to these additional duties, a Tesla spokesperson stated that it would continue Gigafactory 2’s expansion regardless of the government’s additional tariffs. Panasonic, Tesla’s battery partner, is also collaborating with the electric car and energy company in Gigafactory 2. Thus, once solar production hits its stride in the Buffalo, NY facility, Tesla would be largely unaffected by extra duties imposed by the US government on important solar components.

Signs of a ramp in Gigafactory 2 started emerging last April when Tesla announced that it was hiring more workers for the site through five rounds of information sessions that are aimed at seeking out potential employees for the facility. The recent information sessions were Tesla’s most extensive hiring initiatives for the factory since the acquisition of SolarCity back in 2016.

Tesla recently posted the first teaser of its virtual power plant project in South Australia, providing a brief overview of the initiative, the resources it will entail, as well as its benefits to residents in the region.

Tesla’s South Australia virtual power plant, which will be comprised of 50,000 residential homes fitted with solar panels and Powerwall 2 home batteries, will be the world’s largest VPP system when completed. The company also noted that the system was specifically designed to support the state’s energy needs by lowering power rates for residents and providing additional stability to the grid. 

Tesla’s virtual power plant for South Australia was approved by the ruling  Liberal party last May, after Energy Minister Dan van Holst Pellekaan reaffirmed the government’s support for the project at the Australian Energy Storage Conference.

“It’s very important to be clear about this — we are honoring the existing commitments around the Tesla virtual power plant (VPP). The VPP project is currently proceeding with the two trial phases as planned. The trial phases involve installation of home energy systems on 1,100 Housing SA homes. These are supported by a $2 million grant and a $30 million loan from the State Government. Subject to private finance, and the first two phases’ success, the third phase could grow to up to 50,000 home batteries connected to new solar installations, and this is in addition to our government’s 40,000 home election commitment,” he said.

Before the Energy Minister’s announcement in May, Tesla’s virtual power plant seemed like it was in danger of being canceled. The comprehensive energy initiative was conceived by Tesla and the Labor party, but when the Liberal Party won the elections last March, new South Australian Premier Steven Marshall noted in a statement that his government would not be supporting the project. Instead, Marshall proposed a different energy initiative — one that involves giving subsidies for 40,000 homes to purchase home battery systems.

Unlike Tesla’s virtual power plant, Marshall’s plan would require homeowners to pay for their battery packs (albeit at a lower price), which would make the system unattainable for low-income households. Marshall’s plan would also be limited to homes that were already fitted with solar panels. In comparison, Tesla’s virtual power plant would provide both solar panels and Powerwall 2 batteries to low-income households for free.

Amidst backlash over his lack of support for the South Australia virtual power plant, Marshall ultimately took a more moderate stance on the project just a few days later. By the end of May, Energy Minister Dan van Holst Pellekaan announced the government’s support. The South Australian government further noted that Tesla’s virtual power plant would be set up alongside Marshall’s alternative battery storage subsidy plan.

Tesla’s virtual power plant project in South Australia is expected to deliver 250 MW of solar energy and 650 MWh of battery storage capacity when complete, dwarfing Hornsdale Wind Farm near Jamestown, which has a 100MW/129MWh capacity. The South Australia state government is assisting with the release of a $2 million grant and a $30 million loan from the Renewable Technology Fund to get the project underway. Additional funding for the virtual power plant, which is estimated to cost a total of $800 million when complete, is expected to be addressed by private investors.

The first phase of the South Australia virtual power plant, which involves the installation of solar panels and Powerwall 2 batteries to the first 1,100 homes in the system, is already underway.

Watch Tesla’s first teaser for the SA virtual power plant in the video below.