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Tesla completes 22 Powerpack installation for PG&E outside San Francisco

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Tesla has completed the installation of a 2MWh Powerpack system for Pacific Gas & Electric in Browns Valley near San Francisco, making it the second utility-scale Powerpack project the company has completed in California.

The Browns Valley project, designed and installed by Cupertino Electric, is made up of 22 Tesla Powerpack systems which use battery cells manufactured at the company’s Gigafactory plant in Nevada. Total capacity of the system is half a megawatt — enough to power 380 homes for up to four hours. Demand can shift from moment to moment. Batteries can respond to such transitory needs instantaneously in a way that a peaker plant cannot.

The California legislature requires utility companies to use storage solutions for excess electricity produced by solar panels during the day so it can be used later when demand spikes — usually in the late afternoon and early evening hours when people are getting home from work. This approach, known as “time shifting” — reduces the need to build so-called peaker plants, generating facilities that sit idle most of the day but get fired up whenever extra electricity is needed.

Electrical storage is not a new idea. Since 1984, PG&E has relied on a pumped storage facility in the Helms Valley high up in the Sierra Nevada mountains east of San Francisco. That installation uses excess electricity to pump water uphill during the day so it can flow back downhill later, turning hydroelectric turbines as it falls. It has a total capacity of 1.2 megawatts.

But such projects require years of planning, permitting, and construction. So do natural gas fired facilities. The allure of battery storage is that it can be completed quickly and can be sited close to the grid structure it serves. “It’s pretty modular — you can scale up and down as you need,” said Mike Della Penna, PG&E’s project manager for the Browns Valley installation.

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Battery storage is still relatively expensive (neither PG&E nor Tesla would reveal the cost of the Browns Valley installation reports the SF Gate), but the speed with which battery storage facility can be designed, built, and brought online helps to offset some of that additional cost. Taking a longer view, firing up a peaker plant is expensive. Eliminating that cost over a period of years will help balance out the initial investment.

And battery costs are dropping faster than most people anticipated. The second generation Tesla Powerwall home battery system came on the market barely one year after the original went on sale. It has double the capacity but actually costs less because the inverter is built in. Tesla does not reveal the cost of its grid scale Powerpack batteries, but it is a safe assumption that a similar drop in price applies to them as well.

Grid scale battery storage is still in its infancy and all stakeholders are exploring the least expensive and most efficient way to make use of it going forward. PG&E and Tesla are working together on a pilot project that uses Powerwall batteries in homes and businesses in the Bay Area. The total capacity of the distributed storage will be equal to that of the Browns Valley project. PG&E will be able to study the performance of both systems — one distributed and one centralized — to learn how each benefits the local grid. “They’re each with their own challenges and opportunities,” Della Penna says. “We’ve structured it so we’ll have a lot of really good learning here.”

Elon Musk has said he expects the storage battery business to be larger than Tesla’s automobile business one day. The lessons learned from projects like Mira Loma and Browns Valley will become the foundation for the Tesla’s grid storage business in the future.

Interested in solar? Get a solar cost estimate and find out how much a solar system would cost for your home or business.

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Tesla launches first Virtual Power Plant in UK – get paid to use solar

Tesla has launched its first-ever Virtual Power Plant program in the United Kingdom.

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Credit: Tesla Energy | X

Tesla has launched its first-ever Virtual Power Plant program in the United Kingdom. This feature enables users of solar panels and energy storage systems to sell their excess energy back to the grid.

Tesla is utilizing Octopus Energy, a British renewable energy company that operates in multiple markets, including the UK, France, Germany, Italy, Spain, Australia, Japan, New Zealand, and the United States, as the provider for the VPP launch in the region.

The company states that those who enroll in the program can earn up to £300 per month.

Tesla has operated several VPP programs worldwide, most notably in California, Texas, Connecticut, and the U.S. territory of Puerto Rico. This is not the first time Tesla has operated a VPP outside the United States, as there are programs in Australia, Japan, and New Zealand.

This is its first in the UK:

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Tesla is not the only company that is working with Octopus Energy in the UK for the VPP, as it joins SolarEdge, GivEnergy, and Enphase as other companies that utilize the Octopus platform for their project operations.

It has been six years since Tesla launched its first VPP, as it started its first in Australia back in 2019. In 2024, Tesla paid out over $10 million to those participating in the program.

Tesla VPP program in California hits new capacity milestone

Participating in the VPP program that Tesla offers not only provides enrolled individuals with the opportunity to earn money, but it also contributes to grid stabilization by supporting local energy grids.

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Tesla Lathrop Megafactory celebrates massive Megapack battery milestone

The Tesla Megapack is the backbone of Tesla Energy’s battery deployments.

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Credit: Tesla Megapack/X

The Tesla Lathrop Megafactory recently achieved a new milestone. As per the official Tesla Megapack account on X, the Lathrop Megafactory has produced its 15,000th Megapack 2 XL battery.

15,000 Megapack Batteries

Tesla celebrated the milestone with a photo of the Lathrop Megafactory team posing with a freshly produced Megapack battery. To commemorate the event, the team held balloons that spelled out “15,000” as they posed for the photo.

The Tesla Megapack is the backbone of Tesla Energy’s battery deployments. Designed for grid-scale applications, each Megapack offers 3.9 MWh of energy and 1.9 MW of power. The battery is extremely scalable, making it perfect for massive energy storage projects.

https://twitter.com/Tesla_Megapack/status/1932578971700638203

More Megafactories

The Lathrop Megafactory is Tesla’s first dedicated facility for its flagship battery storage system. It currently stands as the largest utility-scale battery factory in North America. The facility is capable of producing 10,000 Megapack batteries every year, equal to 40 GWh of clean energy storage.

Thanks to the success of the Megapack, Tesla has expanded its energy business by building and launching the Shanghai Megafactory, which is also expected to produce 40 GWh of energy storage per year. The ramp of the Shanghai Megafactory is quite impressive, with Tesla noting in its Q1 2025 Update Letter that the Shanghai Megafactory managed to produce over 100 Megapack batteries in the first quarter alone.

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Tesla Energy’s Potential

During the first quarter earnings call, CEO Elon Musk stated that the Megapack is extremely valuable to the energy industry. 

“The Megapack enables utility companies to output far more total energy than would otherwise be the case… This is a massive unlock on total energy output of any given grid over the course of a year. And utility companies are beginning to realize this and are buying in our Megapacks at scale,” Musk said.

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Tesla Megapacks powers the xAI Colossus supercomputer

Tesla Megapacks step in to stabilize xAI’s Colossus supercomputer, replacing natural gas turbines. Musk’s ventures keep intertwining.

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(Credit: Tesla Megapack)

Tesla Megapack batteries will power the xAI Colossus supercomputer in Memphis to ensure power stability. The collaboration between Tesla and xAI highlights the synergy among Elon Musk’s ventures.

The artificial intelligence startup has integrated Tesla Megapacks to manage outages and demand surges, bolstering the facility’s reliability. The Greater Memphis Chamber announced that Colossus, recently connected to a new 150-megawatt electric substation, is completing its first construction phase. This transition addresses criticism from environmental justice groups over the initial use of natural gas turbines.

“The temporary natural gas turbines that were being used to power the Phase I GPUs prior to grid connection are now being demobilized and will be removed from the site over the next two months.

“About half of the operating turbines will remain operating to power Phase II GPUs of xAI until a second substation (#22) already in construction is completed and connected to the electric grid, which is planned for the Fall of 2025, at which time the remaining turbines will be relegated to a backup power role,” the Chamber stated.

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xAI’s rapid development of Colossus reflects its ambition to advance AI capabilities, but the project has faced scrutiny for environmental impacts. The shift to Megapacks and grid power aims to mitigate these concerns while ensuring operational continuity.

The Megapack deployment underscores the collaboration among Musk’s companies, including Tesla, SpaceX, Neuralink, and The Boring Company. Tesla appears to be the common link between all of Musk’s companies. For example, The Boring Company built a tunnel in Giga, Texas. In addition, Musk has hinted at a potential collaboration between the Tesla Optimus Bot and Neuralink. And from January 2024 to February 2025, xAI invested $230 million in Megapacks, per a Tesla filing.

Tesla Energy reported a 156% year-over-year increase in Q1 2025, deploying 10.4 GWh of storage products, including Megapacks and Powerwalls. Tesla’s plans for a new Megapack factory in Waller County, Texas, which is expected to create 1,500 jobs in the area, further signal its commitment to scaling energy solutions.

As xAI leverages Tesla’s Megapacks to power Colossus, the integration showcases Musk’s interconnected business ecosystem. The supercomputer’s enhanced stability positions xAI to drive AI innovation, while Tesla’s energy solutions gain prominence, setting the stage for broader technological and economic impacts.

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