Tandem PV has achieved a record-breaking conversion efficiency of 30.4% with their perovskite glass tandem configuration module, surpassing the 30% efficiency barrier and showing promising durability with a 1% degradation rate per year. The company, with former U.S. Energy Secretary Jennifer Granholm on board, aims to quickly scale production modules that could achieve 28% efficiency. Their design allows for integration with various cell technologies, ensuring continued improvement in the future and providing more affordable and reliable clean energy solutions for America.
Category: Buildings & Electricity
Cut Emissions:
– Enhance Efficiency
– Shift Energy Sources
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Trina Solar announces 907 W tandem solar module with 29.2% efficiency
Trina Solar has successfully developed a high-efficiency tandem solar module with a record-breaking conversion efficiency of 29.2%, utilizing n-type TOPCon crystalline silicon and perovskite cells. This module, designed for mass production, aims to absorb a wider solar spectrum and has passed reliability testing. The company plans to ramp up production by 2026, showcasing their world-leading performance in efficiency and power output with their tandem solar cell technology.
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Philadelphia clean energy campaign turned millions invested into billions saved. Here’s how.
The Philadelphia Energy Campaign has successfully created over 11,000 jobs and $1.3 billion in economic investment since 2016, while also generating $1.4 billion in energy savings for the city and its residents. Programs like Built to Last and Solarize Greater Philadelphia have provided low-income homeowners with access to housing-repair and solar installation programs. Funding mechanisms such as Commercial Property Assessed Clean Energy and the Philadelphia Green Capital Corp have supported energy efficiency and renewable energy projects, blending public and private financing. Despite the loss of federal funding, the campaign remains resilient and focused on advancing climate solutions through collaboration and political support.
https://www.utilitydive.com/news/philadelphia-energy-campaign-economic-impact-report/821584/
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Battery Storage Boom Brings Free Electricity To Australia
The increase in battery energy storage systems in Australia, along with the growing adoption of BESS globally, is leading to lower electricity costs for residential and small business owners. Grid-scale and residential battery installations are surging, displacing more expensive gas and hydro power and reducing reliance on fossil fuels. The affordability of batteries and the shift towards longer-term storage are key components in the transition to clean energy. Programs like the Solar Sharer initiative demonstrate the potential for renewable energy to outcompete traditional sources, showcasing the importance of battery storage in maximizing efficiency and reliability of renewable energy systems.
https://cleantechnica.com/2026/06/01/battery-storage-boom-brings-free-electricity-to-australia/
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Wind, solar and battery records tumble on last day of Autumn in Australia’s most coal dependent grid
Queensland achieved a new record of 79.5% instantaneous renewables plus storage share of consumption on May 31, 2026, surpassing the previous high of 78.4% in April 2026. This increase was attributed to the use of batteries, exports, and curtailment to manage the midday surplus, showcasing the growing importance of storage in NEM operations. Despite being the most coal-dependent grid in Australia, Queensland's transition towards higher renewable energy usage is evident. The significant increase in battery share of consumption highlights the state's progress towards a more sustainable energy future.
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Connecticut Approves Plug-In Solar – It’s So Exciting!
Connecticut is set to become the sixth state to allow plug-in solar panels, enabling residents to easily add renewable energy to their homes without costly connection agreements with utility companies. The legislation will allow for portable solar panels that can be plugged into household electrical sockets, ideal for renters, apartment dwellers, and those with restrictions on traditional rooftop solar installations. The bill also includes provisions for extending solar programs, establishing new rules for solar use, and implementing incentives for low-income community solar and residential energy storage. This move towards small-scale solar capacity is part of a broader effort to promote the development of residential, agricultural, and corporate solar power in Connecticut, with an aggregate target of 180 megawatts per year starting in 2028, ultimately aiming to lower utility bills, improve system reliability, and expand consumer protection while gradually introducing clean energy solutions.
https://cleantechnica.com/2026/05/30/connecticut-approves-plug-in-solar-its-so-exciting/
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Proposal for high fixed network charges is wrong on home batteries, dynamic pricing, and impact on CER
The AEMC's Pricing Review on electricity pricing aims to assess the effectiveness, efficiency, and equity of current network electricity pricing and services in the context of increasing deployment of rooftop PV, home batteries, and electric vehicles. The focus is on putting electricity users first, addressing affordability challenges, improving energy self-sufficiency, and reducing environmental impacts. Household electrification and consumer energy resources are key to achieving these aims, as they can help flatten distribution network load peaks, increase network utilization, reduce costs, decrease emissions, and support the Federal Government's renewables target. The section also discusses the potential impact of moving network charges to fixed costs on the uptake of clean energy resources (CER) such as solar, batteries, and heat pumps, emphasizing the need for rigorous analysis to determine the net impact of CER on network costs, spot prices, and emissions reductions. Ultimately, the focus should be on policies and regulations that facilitate the uptake of CER to reduce electricity costs for all customers.
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Beyond Washington: Nine examples of local governments taking climate action
State and city governments across the United States are taking bold climate action, leading the way in renewable energy expansion, ecosystem protection, and regenerative agriculture promotion as federal leadership falters. California and Vermont have set ambitious goals for renewable energy sourcing, while Chicago is transitioning to clean energy and carbon neutrality by 2050. States like Oregon and Massachusetts are implementing innovative conservation and food waste reduction policies, aligning with the One Earth Solutions Framework to combat climate change. These local efforts demonstrate the tangible results of determined action and serve as a blueprint for national and global climate solutions, emphasizing the importance of starting meaningful change at the local level.
https://www.oneearth.org/nine-examples-of-local-governments-taking-climate-action/
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An Easier Path To Heat Pumps: Monthly Lease, No Up-Front Cost
Heat pumps are gaining popularity in the US due to their energy efficiency, with sales surpassing gas furnaces for the fourth consecutive year in 2025. Startups like Quilt are developing more efficient systems and partnering with companies like Palmetto to reduce installation costs and expand rapidly across North America. Programs such as "Power Ahead Colorado" are working to accelerate heat pump adoption by addressing financial barriers and providing contractor training. Partnerships between companies like Palmetto and Quilt are offering monthly plans to make it easier for homeowners to switch to energy-efficient HVAC systems, while organizations like the Building Decarbonization Coalition are addressing permitting obstacles to streamline the process for energy upgrades. The focus on scalability and innovation in the built environment sector is evident in these developments, with companies like Symbium receiving investments to strengthen their leadership in instant permitting.
https://cleantechnica.com/2026/05/29/heat-pumps-us-startup-quilt-lease-finance/
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5 pieces of good climate news that you probably missed recently
Global efforts towards climate accountability, energy sovereignty, and renewable energy are gaining momentum, with the United Nations affirming governments' legal responsibility to act on climate change. Pacific communities are embracing community-owned solar systems, while countries in Southeast Asia are increasingly turning to rooftop solar as global fuel prices rise. Polling across 13 countries shows growing support for renewable energy and a shift away from fossil fuels, as people demand cleaner, fairer, and more affordable energy systems. Activists in Africa are mobilizing for affordable, community-owned renewable energy, challenging the narrative of fossil fuel expansion. The transition to a safer, fairer, and more affordable energy future is already underway, with communities organizing, families choosing renewable energy, and young people demanding accountability.
https://350.org/5-pieces-of-good-climate-news-that-you-probably-missed-recently/