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.
Category: Buildings & Electricity
Cut Emissions:
– Enhance Efficiency
– Shift Energy Sources
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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/
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All solar cell efficiencies at a glance – updated
The Solar Cell Efficiency Tables, led by Professor Martin Green from UNSW, have been updated to Version 68 and will be available as open access in Joule starting from July 2026. The latest results show new efficiency records for large area silicon cells, modules, and lead halide perovskite cells. Progress has also been made with perovskite-silicon tandem cells and modules, indicating a positive trend towards more efficient and sustainable photovoltaic systems. Additionally, Version 67 presented a new record of 27.9% efficiency for an interdigitated-back-contact (IBC) device developed by Longi, showcasing significant advancements in solar cell technology since the tables were first published in 1993. Scientists from various institutions around the world, including the European Commission Joint Research Centre, Germany's Fraunhofer Institute for Solar Energy Systems, and the US National Renewable Energy Laboratory, have contributed to these advancements.
https://www.pv-magazine.com/2026/05/29/all-solar-cell-efficiencies-at-a-glance-updated-6/
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German consortium developing aluminum facade elements with integrated PV modules
Researchers from Germany have developed a PV-activated design facade element with aluminum as the base material, funded by Germany's Federal Ministry for Economic Affairs and Energy. The approach involves directly laminating a PV module onto the aluminum facade element, with challenges such as bending and electrical insulation addressed. The prototypes of the PV-activated facade element differ from a facade element without PV by only two connectors, making them more likely to be accepted and used by installers. Scientists have developed a prototype called BIPV-4 for a façade element that utilizes aluminum-based PV technology, demonstrating that it can match conventional module performance while maintaining safe electrical isolation. The design includes rear junction boxes, insulated cross-connectors, a zigzag 3D structure, golden anodized aluminum, and optimized use of M12 cells. The group also created multiple PV design façade variants with adaptable cell formats, different surface geometries, and customizable color options, allowing for integration into diverse façade geometries and scalable to different module sizes up to 2 meters.
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Environmental News Network – New Method Turns Ocean Water Into Drinking Water, Without Waste
A new energy-efficient desalination system developed at the University of Rochester produces fresh water without chemical additives and transforms leftover salts into useful materials. The solar-thermal desalination process overcomes the drawbacks of traditional techniques by producing fresh water in an energy-efficient way that does not leave behind harmful brine. This innovative approach offers a sustainable solution to the global water crisis and reduces the negative impact on sea life caused by traditional desalination methods.
https://www.enn.com/articles/78036-new-method-turns-ocean-water-into-drinking-water-without-waste