Energy Digest

The use of AC-coupled or DC-coupled battery energy storage systems (BESS) in solar-plus-storage deployments is not as straightforward as initially thought, with real project behavior showing that higher efficiency alone does not guarantee better economic performance. A detailed engineering study found that the interaction between PV production, grid constraints, and system cost introduces complexities that cannot be captured by simplified assumptions about efficiency. The study aimed to design and evaluate two architectures using AC and DC coupling approaches under a clearly defined use case.

Arevon Energy's 300-MW Nighthawk Energy Storage Project has come online in Poway, California, marking the company's largest standalone battery energy storage project. The project brings renewable energy storage capabilities to California, supporting grid stability and reliability. Arevon announced the project's completion on August 13.

US Interior Secretary Doug Burgum has admitted that energy storage is a real and tangible thing, launching a new battery factory to demonstrate its existence. This marks a significant shift in the government's stance on energy storage, which was previously downplayed or dismissed. The launch of the factory suggests a growing recognition of the importance of energy storage technology in the transition to a low-carbon economy.

The Austrian government plans to shift its focus on energy storage by redesigning the subsidy framework, with storage infrastructure receiving greater weight in the new grid plan and permitting processes for battery storage being accelerated. The "first come, first served" model for funding applications is set to be scrapped, allowing for retrofits of existing solar arrays with battery storage and EMS to be eligible for subsidies. Broad funding for small photovoltaic systems will be phased out, with financial support instead directed towards energy management systems and smart storage.

The Federal Communications Commission (FCC) clarified that 45X-eligible inverters are not part of the import ban on foreign-produced inverters, despite being listed as a potential risk to national security. The FCC added foreign-produced inverters to its list in June, but specified that only conditionally approved inverters would be subject to restrictions. This clarification aims to ensure a smoother transition for eligible inverters without imposing unnecessary barriers.

Cogeneration, a method of generating both electricity and heat from a single fuel source, is re-emerging in the US as demand for power rises faster than new generation can be built. This shift is driven by growing electricity usage, particularly among large users like industries and data centers. Cogeneration offers a more efficient and reliable alternative to relying solely on the grid for power needs.

PJM Interconnection has proposed a plan for data centers to bring their own power, and Pennsylvania is leading efforts to implement this initiative, aiming to prevent data centers from spiking power prices in the region's grid. The proposal aims to reduce the financial burden on PJM's customers by allowing data centers to purchase their own electricity. This move could potentially mitigate the strain of high energy demand from data centers.

US battery storage developer Key Capture Energy has secured a $300 million financing deal with Standard Chartered. The funding is intended to support the deployment of KCE's technology, specifically in the NY-ISO and MISO grids. This investment marks an important milestone for the company as it moves forward with grid-scale energy storage solutions.

Peak energy use tends to occur in the evenings, coinciding with decreased solar generation. Solar panels often produce more energy than needed during the day, making energy storage a crucial aspect of harnessing solar power. Energy storage solutions can help stabilize the grid and provide backup power when the sun is not shining.

PJM Interconnection has proposed a new framework allowing large data centers to enter service without pre-securing capacity, with the uncovered load available for reduction before PJM calls on emergency demand-response resources if supply is threatened. The move aims to address growing energy demands as capacity shortfalls deepen. This approach prioritizes flexibility and adaptability over traditional planning requirements.