Electric Cars

Puerto Rico has dramatically bolstered its energy infrastructure through an intensified partnership with Sunrun, the solar and energy storage company. The island's grid recently engaged Sunrun's network of home batteries for an uninterrupted period of 18 days throughout October, highlighting a significant leap in leveraging distributed energy resources for grid stabilization. This collaborative effort has seen the participation in Sunrun's virtual power plant (VPP) double, now encompassing over 60,000 households, thereby establishing a robust and flexible power supply system capable of mitigating the island's persistent electricity challenges.

A virtual power plant functions by connecting a multitude of residential battery storage units, orchestrating their collective discharge to supply power to the grid as a unified entity. Sunrun's VPP in Puerto Rico currently integrates nearly 70,000 batteries, frequently delivering a substantial 45 megawatts of power for four-hour durations. Since April, these batteries have been dispatched more than 60 times, with continuous deployment commencing on October 13 to alleviate strain during an unseasonably warm period. For Puerto Ricans, who contend with some of the highest electricity rates in the United States, averaging 26.36 cents per kilowatt-hour in August compared to the national average of 18.16 cents, according to the US Energy Information Administration (EIA), securing consistent power remains a critical concern. The strategic utilization of existing home battery systems offers an immediate and efficient solution, enabling the grid to access stored energy when demand peaks, circumventing the lengthy process of constructing new power generation facilities.

Sunrun's VPP has experienced exponential growth, expanding from approximately 4,000 customers in 2024 to over 30,000 by 2025, solidifying its position as the largest aggregator within Puerto Rico's Customer Battery Energy Sharing (CBES) program. LUMA, the island's grid operator, activates the CBES program during anticipated periods of high electricity demand or when reserve capacities are low. In response, companies like Sunrun autonomously manage the dispatch of battery power. Participating homeowners receive financial compensation for contributing their stored energy to the grid, while retaining control over the amount reserved for personal backup. Sunrun indicates that most participants share only a fraction of their total battery capacity, with the company generating recurring revenue from the operational management of this extensive network. Data from July reveals that the broader CBES program, with over 90,000 participating customers, has collectively supplied an average of 75 MW during instances of generation deficit.

The imperative for a more expansive virtual power plant in Puerto Rico extends beyond the immediate aftermath of hurricanes. In 2025, Puerto Rican residents experienced an average of 36 hours without power, even excluding major weather events, marking a 19% increase from 2024. This contrasts sharply with mainland US customers, who typically endure only about two hours of outages annually under similar metrics. Major events further compounded the island's power disruptions, adding an additional 23 hours of outages. While an increase in battery storage capacity is undeniably beneficial, the magnitude of the supply deficit remains a critical factor. A regulatory submission in April by participating aggregators indicated that the current program, with its approximately 50 MW of four-hour capacity, was insufficient to avert all rolling blackouts in 2025 when supply gaps exceeded this threshold. Consequently, there is an ongoing drive to enroll more batteries into the program to fortify its ability to address more significant power shortfalls and enhance overall grid resilience.

The strategic deployment and continuous expansion of Sunrun's residential battery network represent a vital step towards energy independence and stability for Puerto Rico. This innovative approach not only empowers individual homeowners by providing financial incentives and reliable backup power but also fundamentally transforms the island's energy landscape, moving it towards a more resilient, distributed, and sustainable model.

A pioneering German startup is revolutionizing energy storage by giving a second life to discarded e-bike and e-scooter batteries. Their innovative system integrates these used power cells into industrial-scale energy storage units, offering an economical and sustainable alternative to conventional solutions. This initiative not only tackles the growing problem of battery waste but also extends the operational lifespan of valuable resources, promoting a circular economy within the e-mobility sector.

This forward-thinking company is further developing its technology to incorporate various battery types from different manufacturers into a single, cohesive energy storage system. This future expansion will significantly enhance the versatility and applicability of their solutions, allowing for broader integration of repurposed batteries. Additionally, plans are underway to scale up their offerings with larger capacity systems, further solidifying their commitment to providing robust and environmentally friendly energy storage options to a wider market.

Transforming E-mobility Waste into Sustainable Energy Solutions

Millions of batteries from electric bicycles and scooters are discarded annually, despite often retaining significant residual capacity. Recognizing this untapped potential, EDENenergy, a German startup comprising three founders and a small part-time team, has developed a groundbreaking method to reintegrate these batteries into robust energy storage systems. Their initial commercial offering is a 70-kilowatt-hour battery unit, ingeniously constructed from 112 second-life e-scooter batteries. Extensive testing revealed that these previously used batteries impressively maintain approximately 90% of their original capacity, far exceeding initial expectations of 80%.

By repurposing these batteries, the startup significantly reduces waste and offers a cost-effective energy storage solution. Unlike their demanding first life in e-mobility vehicles, where they endured vibrations and extreme temperature fluctuations, these batteries enjoy a more stable existence within the stationary energy storage systems. This less strenuous environment is expected to prolong their functional life. Furthermore, the modular design of EDENenergy's systems allows for the easy replacement of individual battery modules as needed, ensuring the system consistently maintains its rated 70 kWh capacity without requiring a complete overhaul.

Advanced System Design and Future Expansion

EDENenergy's innovative energy storage units feature sophisticated remote monitoring capabilities for each individual battery module. This allows for proactive maintenance and seamless module replacement without disrupting the entire system's operation, a critical advantage for applications where power continuity is paramount. The initial deployment of these systems includes a solar inverter, specifically targeting small to medium-sized businesses that already utilize solar panels but lack efficient energy storage solutions. This strategic integration helps these businesses maximize their renewable energy consumption and reduce reliance on the grid.

Looking ahead, EDENenergy aims to enhance the versatility of its systems by developing technology capable of accommodating diverse battery types from various manufacturers within a single enclosure. This will involve adapting connector interfaces, battery management systems, and communication protocols to ensure compatibility. While currently relying on large suppliers for consistent battery types, this future development will broaden their sourcing options, particularly within the varied e-bike battery market. The company is also working on a larger 300 kWh system, which will incorporate around 500 second-life e-scooter batteries, diverting them from landfills and further underscoring their commitment to sustainability. Ultimately, when these repurposed batteries reach the end of their second life, they will be sent to specialized recycling facilities for material recovery and reuse, closing the loop on their lifecycle.