Just a quick brainstorm, or maybe it's a brain fart, on this topic. I was looking at the formula for determining the potential energy for a floating ocean weight drop system

Mwh storage =

(wt kg)(.6 factor for Archimedean of water)*(9.81)*(Meter depth)

3 600 000 000joules

Pilots on these types of systems have only accompanied offshore wind for the most part. Was thinking Cali coast u can get to 3000m depth pretty quickly ,30-40 miles out at some points. Some salvaged high displacement hulls for a few hundred thousand tons, dredged sand filled weights, tethering/mooring, submarine hvdc cable, high eff motors/gens... Seems like you could get to a very economical gwh/$, albeit not at the efficiency of battery storage? gravity and pumped hydro are in the 80%eff neighborhood i believe. I think you would lose some efficiency here with water friction and inverter/transmission losses. Any thoughts on why this wouldnt be a viable storage method serving connections on land as opposed to wind farms?

I felt like gravitricitys 3.3gwh in China at a $1bil+ was more of a fail than win since the cost is comparable to battery systems.

New Jersey has the second biggest waterfall West of the Mississippi. It’s called Passaic falls or Paterson great falls and it’s been making hydroectricity for a very long time. It’s both really cool and extremely lame.

What’s also really cool and extremely exciting about great falls is that it has a neighboring reservoir. This reservoir is abt 35 feet up and 400 feet away from the Passaic river before the waterfall. It’s also 110 feet up and 800 feet away from the Passaic river after the falls.

The reservoir was used for drinking water but there is a project to build 2 water tanks and preserve the rest of the reservoir. The project is supposed to break ground soon so I hope it’s not too late.

Here are my questions?

1. Will there be too much head loss because of the horizontal distance being covered with such a low head?
2. How big of a pipe would we need to minimize this head loss?
3. How much water would is needed for for a 4 hour discharge?
4. How long would it take to design such a system?

Please tell me why this shouldn’t be a pumped hydro facility.

Step 1: The ball (made of tire material and filled with air) is placed sideways in the gap between the water surface, with half of its surface area outside of the water and the other half in water. Step 2: The buoyancy force acts on the submerged portion of the ball, creating a torque/twirling motion. Step 3: The ball rotates around its center, causing it to spin. Step 4: Air inside the tire gives the ball's buoyancy and regulates the amount of buoyancy force Step 5: The gap where the ball is positioned is designed to be tight or narrow enough to allow no saltwater leaks step 6: even if there are salt water leaks there is a lower resevoir saving leaked salt water and when it detects the weight of the salt water it will pump it back up by the energy generated.

Would this work or am i stupid?

Hello everyone, I’m a mechanical engineering student and I’m currently creating a residential BESS with sodium ion batteries, with a capacity of 5 kWh, but I do need some advice regarding the VDC of the battery module since I’m new to all these concepts. Is an output of 24.8 VDC sufficient to power only the essential appliances like the WiFi router, television, freezer and lights? If not, what is the minimum VDC required for the system to work effectively.

I'm thinking that the public will be better served by understanding the difference between types of thermal storage. I see at least three very different "classes" of thermal storage:

1. Heat in, heat out.
2. Electricity in, heat out.
3. Electricity in, electricity out.

We must not conflate these, such as by comparing efficicies, except within the same class.

Hey guys, I’m a high school student actually I drop out my college. I want to do something new I want to make my field in energy storage so I want to know what knowledge should I know and how to learn it and I don’t know how to start, so I’m confuse for many times. 😺

Hi there

I’m curious about the technology of this company: www.redoxone.com

Their description:

Redox One’s mission is clear - to pioneer a sustainable energy future through safe, innovative, and cost-effective power storage solutions. We achieve this with our groundbreaking Fe-Cr Redox Flow Battery technology, which is revolutionising the way we harness and store energy. Our innovative technology and mine-to-machine strategy are game changers for power storage solutions.

Are there any experts out there to comment on the validity of this technology? Are their claims true?

Thanks

TrendForce research reveals that after experiencing low capacity utilization in the first quarter, the EV battery industry saw a significant recovery in market demand starting in March. April’s peak season led to a surge in demand, boosting lithium battery production and slightly raising EV battery prices. In May, the market continued its peak season trend with stable demand and prices. Monthly ASP for square ternary, square LFP, and pouch ternary cells were CNY 0.50/Wh, 0.43/Wh, and 0.52/Wh, respectively.

In the ESS sector, May saw a surge in demand for solar energy paired with storage. The Chinese market’s grid-connected storage projects entered the stocking period in May–June, leading to a growth in enterprise orders and slight price increases for some products. The ASP of square LFP cells in May was CNY 0.43/Wh, remaining stable compared to the previous quarter.

TrendForce analysis indicates that ESS cells are transitioning from 280 Ah to 314 Ah. Although 314 Ah ESS cells have not yet been shipped in large quantities, their mass production is expected in the first half of the year. Their market penetration in power-side, grid-side, and commercial energy storage markets is anticipated to gradually increase in the second half of the year, highlighting their advantages in cost-performance.

For the entire quarter, TrendForce reports that Q2 market demand is better than expected, with overall stable prices for EV and ESS cells. However, it is worth noting that the industry chain’s stocking exceeded end-user installation demand during the peak season between April to May, leading to inventory build-up due to overproduction by cell manufacturers. 

TrendForce predicts that the procurement demand for battery materials will decline in June, putting pressure on lithium prices. As a result, the cost support for EV and ESS cell materials will weaken, and cell prices are expected to remain flat or slightly decrease by the end of Q2.

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I'm interested in the technical side of battery system design. For those who design and develop battery systems, what are the biggest technical challenges you face? This could include issues related to energy density, thermal management, BMS (Battery Management System) integration, etc. I'd love to hear about your experiences and any solutions you've found.

Grid Scale BESS is a challenging arena. What are people seeing as the main challenges? Is anyone getting it right?

According to TrendForce Global Automotive Reports, the global sales of NEVs (including BEVs, PHEVs, and FCEVs) surged to 2.842 million units in 1Q24—making a 16.9% YoY increase. Notably, this is the first time in three years that the YoY growth rate of quarterly global NEV sales has dipped below 20%. BEV sales reached 1.8 million units, up 4.2% YoY, while PHEV sales skyrocketed 48.3% to 1.041 million units.

In the BEV segment, Tesla held its crown with a 21.5% market share, despite a YoY growth rate of -8.5%. BYD (excluding Denza) followed with a 16.6% share and a growth rate of 13.3%. SAIC-GM-Wuling claimed third place, while BMW impressively climbed to fourth with a 41.1% sales increase. Conversely, GAC Aion experienced a sharp 37.2% decline, dropping to sixth as its key model, the Aion S, struggled to expand beyond the ride-hailing market. However, the commercial market space is limited. Without expanding into the consumer market, GAC Aion’s sales are likely to decline. Consequently, its quarterly ranking and market share have fallen for two consecutive quarters.

The PHEV segment saw BYD continue its dominance, even though its market share slightly dipped. As a group, BYD’s combined sub-brands secured over 30% of the market. AITO ranked second, but its key model, the M7, is facing scrutiny over traffic accidents, which may impact its brand image and consumer trust. Li Auto, ranked third, shifted focus to PHEVs following a lukewarm response to its first BEV, with its new affordable L6 model (CNY 250,000) expected to drive sales and market share this year. Jeep ranked sixth, enjoying a 37% sales boost after updating its main models. 

TrendForce underscores that PHEVs are set to play a crucial role in the electrification journey, maintaining strong sales resilience amid slowing BEV demand. Automakers are recalibrating their strategies within the European market as they move away from a 2030 full electrification goal and begin reinvesting in PHEV development. This pivot could revive PHEV sales in Western Europe, following two years of decline, and drive growth through 2024.

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Hope this is allowed as a post, didn't see anything in rules stating otherwise but hopefully I didn't Miss anything.

I am looking around for someone with experience with a very specific B.e.s.s system and was hoping I might find someone here who has that experience. This is regarding a project a close friend is doing which involves a Genset built and designed by my friend and his employer and the integration of a Bess system made by a company called Enerdel. The trouble is regarding communication and commands over the communication interface. From what my friend is saying the Enerdel system is extremely locked down as it was originally designed for the military. In addition to this issue it also seems like the company is now defunct and he is unable to contact the company/an engineer at the company. I realize this is a niche application and I'm unlikely to find anyone who has experience with this type of system but I still wanted to ask just as an effort to assist someone close to me who always has assisted me in the past. Its important in my opinion to help those who have been good to you where possible and that is my goal by making this post. If by any chance someone has experience with this system please pm me or comment on the post, I would greatly appreciate any assistance anyone can offer here, or if there is a better place to post this question that I have not found yet I would not mind any suggestions as well, thank you very much.

Long duration energy storage (LDES) is currently a fragmented commercial space with a myriad of electrochemical, mechanical and thermal technologies. The question in everyone's mind (also the most valuable question of the day) is: Which LDES technology/company will make it past the valley of death and enter the land of financial prosperity? This article provides a progress update on how various leading LDES players are tackling this quest: https://energystoragechronicles.beehiiv.com/p/investing-long-duration-energy-storage-ldes-fy-2023-performance?_gl=1*1fddu0z*_ga*MjkwOTczNDEtZGUzYi00NGQ4LWFlYTYtNzA0OWYwZDJkZTM4*_ga_E6Y4WLQ2EC*MTcxNjM4ODM5OS40NDguMS4xNzE2Mzg4ODI4LjYwLjAuODYwMTE0MDcy*_gcl_au*MjA2Njg4OTA4MC4xNzEwMTA1ODY5

hi i just joined a energy storage company, and I noticed how competitive the market is. I wonder if anyone can give me some tips about how to breakthrough the market. I'm doing international sales for a chinese factory. I've been using the traditional methods: linkedin, ENF, googles but responses are scarce..

thanks in advance!

Amidst the pursuit of dual carbon targets, there's a heightened focus on advancing new energy storage technologies. Lithium-ion, compressed air, and other storage methods are poised for significant development, indicating a promising future for the electrochemical energy storage industry. This sector is anticipated to experience rapid growth in the coming years.

Keyword: Competition
In 2023, new energy storage practitioners experienced intense competition as the prevailing sentiment. The pressing issue of involution spurred ongoing technological advancements and reduced prices of energy storage systems. TrendForce data indicates that the overall trend for energy storage system (ESS) prices is a continued decline in 2024. Specifically, the bidding prices for ESS in March 2024 are expected to vary based on different energy storage durations.

Winning prices for ESS in March

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The cost reduction in the new energy storage process has surpassed industry expectations, along with the rapid pace of development. In March 2022, the National Development and Reform Commission and the National Energy Board introduced the implementation program for new energy storage development under the 14th Five-Year Plan. By 2025, new energy storage is projected to transition from the early stages to a burgeoning phase of commercialization. Furthermore, during this period, new energy storage systems are anticipated to meet the conditions for large-scale commercial applications, with costs expected to decrease by over 30%.
In less than two years, the new energy storage industry has surpassed its cost reduction targets. Yue Fen noted that in 2023, Chinese companies' shipments of energy storage batteries (excluding those for base stations and data centers) reached an estimated 185 GWh, falling short of initial projections for the year. She also mentioned that various factors have led to an industry-wide average capacity utilization rate of only about 50%, resulting in slowed shipments in the latter half of the year. With rapid capacity expansion and heightened competition in the sector, companies lacking capital and sufficient technological expertise will face increasing pressure.

Keyword: Innovation
Despite facing challenges, participants in the new energy storage sector remain optimistic about future development prospects. A fresh round of competition has ignited in the energy storage market, with various companies intensifying research and development efforts on high-capacity, long-life, and low-cost batteries. Cost reduction and efficiency enhancement have emerged as primary focuses for product advancement, especially within the power generation segment, which dominates the energy storage market share in China. Consequently, expanding the capacity of energy storage products has become the prevailing choice for enterprises aiming to achieve cost reduction.
Currently, storage battery capacities upgrade rapidly, with the mainstream capacity being 280Ah, and there are many other capacity such as 300Ah, 560Ah, 700Ah, and 1130Ah. Additionally, leveraging high-capacity battery cells, leading industry enterprises such as Trina Solar, CRRC Zhuzhou Institute, and CATL are pioneering advancements in single-cabin energy storage compartments to bolster solar power. These efforts have culminated in the introduction of a 20-foot single-cabin 5MWh energy storage system program, igniting a surge in standalone capacity expansion within the energy storage sector.
Furthermore, manufacturers are continually unveiling new 5MWh+ energy storage systems, catering to diverse customer needs with unique solutions.

Keyword: Breakthrough
Breakthroughs are crucial to addressing the prevalent challenge of installations outpacing applications in the downstream sector. Jiang Weiliang, Vice President of Yotai Energy, highlighted that the underutilization of Energy Storage Systems (ESS) stems from a lack of established market mechanisms and unclear profit models. Numerous drawbacks, including scheduling issues, equipment variations, and commissioning challenges, plague energy storage projects. While project bidding winners often make lofty promises, actual implementation falls short, resulting in relatively low utilization rates for energy storage projects. Finding solutions to these hurdles is paramount for driving widespread adoption and maximizing the potential of ES

Keyword: Profits
In the transition towards a new power system centered around renewable energy sources, effective utilization of energy storage is essential alongside its proper implementation.
Chen Jianfu, Co-President of Guangdong New Energy Storage National Research Institute Co., Ltd., emphasizes the challenges faced by large-scale integrated energy storage systems, particularly in terms of grid functionality. To address this, he suggests a comprehensive study of energy storage application scenarios and an analysis of each scenario's specific demands.
Furthermore, the increasing demand for energy storage is expected to drive improvements in policies and market regulations. In a significant development, in September 2023, the National Development and Reform Commission (NDRC) and the National Energy Administration (NEA) issued China's inaugural basic rules for the electricity spot market (trial). These rules explicitly permit new entities such as energy storage systems and virtual power plants to engage in transactions.
With the rapid expansion of the power market and widening peak-to-valley price differentials, energy storage systems are poised to play a pivotal role in transactions within the power spot market and auxiliary services market. This involvement presents opportunities for energy storage to generate profits through transactions.
Analyzing power prices in January reveals significant disparities between peak and valley rates, with the highest gaps exceeding 0.7 yuan/kWh across 19 regions. Notably, Guangdong, Jiangsu, and Hubei provinces lead with peak-to-valley differentials reaching 1.3053 yuan/kWh, 1.1414 yuan/kWh, and 1.0693 yuan/kWh, respectively. These figures underscore the increasingly substantial revenue potential for new energy storage solutions.
As the power industry marches towards the future, energy storage emerges as an indispensable asset. With the widespread integration of renewable energy sources into the grid, coupled with the imperative for peak shaving, frequency regulation, and microgrid development, energy storage assumes a pivotal role in the power system of tomorrow. In 2024, the new energy storage sector is poised to maintain its rapid growth trajectory in response to these evolving demands.