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Tesla Powerwall 2 costs 30% less than closest competitor

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Conservatively, Tesla’s Powerwall 2 home battery storage unit is 30% cheaper than its next closest competitor. Comparing the the cost per warrantied kilowatt-hour (cycled once per day) across 30 different battery systems, Powerwall 2 has the most favorable cost to store each kWh of energy in the battery, as warrantied by the manufacturer.

Comparisons

Taking into account that Tesla offers a AC and DC version of Powerwall 2 with built-in battery-inverter and DC converter, respectively, while its closest competitors on cost per stored kilowatt-hour do not offer comparable inverters, Powerwall 2 becomes even more appealing .The AC version of Powerwall 2 can be installed without any additional hardware; other battery systems require a separate battery-inverter to be installed the same way.

This means the Powerwall 2 AC version, with its built-in battery-inverter, would operate at an average efficiency of around 97.8%, which is exceptional compared to a top-end battery inverter like the Sunny Boy Storage, which is 96.5% efficient. The exception is the Enphase AC Battery, which does include its own battery-inverter and can be used with any rooftop solar system, just as the AC version of the Powerwall 2 can.

 

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Cost per warrantied kilowatt-hour for over 30 battery systems when fully cycled once per day [Source: reneweconomy.com.au]

Cost per warrantied kilowatt-hour for over 30 battery systems when fully cycled once per day [Source: reneweconomy.com.au]

A battery comparison table, provided courtesy of Renew Economy AU,  gives the cost per warrantied kilowatt-hour for over 30 battery systems when fully cycled once per day. The Powerwall 2 is well ahead of the closest competition.

Tesla Powerwall Across the World

Most of the photovoltaic systems in Australia are small-scale residential, and increasingly, commercial rooftop installations. Over 1.51 million small-scale solar power systems were installed across Australia by the end of 2015. Small-scale solar, which was responsible for 16.2% of Australia’s clean energy generation, produced 2.4% of the country’s total electricity, according to Australia’s Clean Energy Council.

Generally, households are getting 0.8 to 1.2 cycles per day from their batteries in Australia. At 1 cycle per day, taking into account battery degradation, warranty for Powerwall 2 will cover it for just about 9 years. This long life has the potential to significantly impact the constancy of Australian consumers’ energy efficiency. For example, earlier in the year, power outages across Australia triggered consumers there to look to the Powerwall for energy independence, with demand increasing 30 time over its usual levels.

A comprehensive 3 kW rooftop solar system with a Powerwall 2 battery storage unit, which is now available for online ordering, sells in Australia for a package price of about $17,900 AUD, or roughly $13,000 USD.

As Tesla owners, solar advocates and obvious believers in the future of sustainable energy, we’ve partnered with a service for estimating solar costs based on one’s location and energy requirement. Please consider supporting the contractors behind the service by getting a solar cost estimate

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Carolyn Fortuna is a writer and researcher with a Ph.D. in education from the University of Rhode Island. She brings a social justice perspective to environmental issues. Please follow me on Twitter and Facebook and Google+

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Tesla Energy gains UK license to sell electricity to homes and businesses

The license was granted to Tesla Energy Ventures Ltd. by UK energy regulator Ofgem after a seven-month review process.

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Credit: Tesla Energy/X

Tesla Energy has received a license to supply electricity in the United Kingdom, opening the door for the company to serve homes and businesses in the country.

The license was granted to Tesla Energy Ventures Ltd. by UK energy regulator Ofgem after a seven-month review process.

According to Ofgem, the license took effect at 6 p.m. local time on Wednesday and applies to Great Britain.

The approval allows Tesla’s energy business to sell electricity directly to customers in the region, as noted in a Bloomberg News report.

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Tesla has already expanded similar services in the United States. In Texas, the company offers electricity plans that allow Tesla owners to charge their vehicles at a lower cost while also feeding excess electricity back into the grid.

Tesla already has a sizable presence in the UK market. According to price comparison website U-switch, there are more than 250,000 Tesla electric vehicles in the country and thousands of Tesla home energy storage systems.

Ofgem also noted that Tesla Motors Ltd., a separate entity incorporated in England and Wales, received an electricity generation license in June 2020.

The new UK license arrives as Tesla continues expanding its global energy business.

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Last year, Tesla Energy retained the top position in the global battery energy storage system (BESS) integrator market for the second consecutive year. According to Wood Mackenzie’s latest rankings, Tesla held about 15% of global market share in 2024.

The company also maintained a dominant position in North America, where it captured roughly 39% market share in the region.

At the same time, competition in the energy storage sector is increasing. Chinese companies such as Sungrow have been expanding their presence globally, particularly in Europe.

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Tesla Powerwall distribution expands in Australia

Inventory is expected to arrive in late February and official sales are expected to start mid-March 2026.

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Credit: Tesla

Supply Partners Group has secured a distribution agreement for the Tesla Powerwall in Australia, with inventory expected to arrive in late February and official sales beginning in mid-March 2026.

Under the new agreement, Supply Partners will distribute Tesla Powerwall units and related accessories across its national footprint, as noted in an ecogeneration report. The company said the addition strengthens its position as a distributor focused on premium, established brands.

“We are proud to officially welcome Tesla Powerwall into the Supply Partners portfolio,” Lliam Ricketts, Co-Founder and Director of Innovation at Supply Partners Group, stated.

“Tesla sets a high bar, and we’ve worked hard to earn the opportunity to represent a brand that customers actively ask for. This partnership reflects the strength of our logistics, technical services and customer experience, and it’s a win for installers who want premium options they can trust.”

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Supply Partners noted that initial Tesla Powerwall stock will be warehoused locally before full commercial rollout in March. The distributor stated that the timing aligns with renewed growth momentum for the Powerwall, supported by competitive installer pricing, consumer rebates, and continued product and software updates.

“Powerwall is already a category-defining product, and what’s ahead makes it even more compelling,” Ricketts stated. “As pricing sharpens and capability expands, we see a clear runway for installers to confidently spec Powerwall for premium residential installs, backed by Supply Partners’ national distribution footprint and service model.”

Supply Partners noted that a joint go-to-market launch is planned, including Tesla-led training for its sales and technical teams to support installers during the home battery system’s domestic rollout.

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Tesla Megapack Megafactory in Texas advances with major property sale

Stream Realty Partners announced the sale of Buildings 9 and 10 at the Empire West industrial park, which total 1,655,523 square feet.

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Credit: Tesla

Tesla’s planned Megapack factory in Brookshire, Texas has taken a significant step forward, as two massive industrial buildings fully leased to the company were sold to an institutional investor.

In a press release, Stream Realty Partners announced the sale of Buildings 9 and 10 at the Empire West industrial park, which total 1,655,523 square feet. The properties are 100% leased to Tesla under a long-term agreement and were acquired by BGO on behalf of an institutional investor.

The two facilities, located at 100 Empire Boulevard in Brookshire, Texas, will serve as Tesla’s new Megafactory dedicated to manufacturing Megapack battery systems.

According to local filings previously reported, Tesla plans to invest nearly $200 million into the site. The investment includes approximately $44 million in facility upgrades such as electrical, utility, and HVAC improvements, along with roughly $150 million in manufacturing equipment.

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Building 9, spanning roughly 1 million square feet, will function as the primary manufacturing floor where Megapacks are assembled. Building 10, covering approximately 600,000 square feet, will be dedicated to warehousing and logistics operations, supporting storage and distribution of completed battery systems.

Waller County Commissioners have approved a 10-year tax abatement agreement with Tesla, offering up to a 60% property-tax reduction if the company meets hiring and investment targets. Tesla has committed to employing at least 375 people by the end of 2026, increasing to 1,500 by the end of 2028, as noted in an Austin County News Online report.

The Brookshire Megafactory will complement Tesla’s Lathrop Megafactory in California and expand U.S. production capacity for the utility-scale energy storage unit. Megapacks are designed to support grid stabilization and renewable-energy integration, a segment that has become one of Tesla’s fastest-growing businesses.

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