--- title: How Fluence Mosaic Helped Stabilize the Grid and Maximize Customer Revenue Amid California's Late Summer Heatwave description: With extreme heat events on the rise, energy storage assets paired with AI-powered bid optimization software can play a critical role in supporting grid stability. image: https://blog.fluenceenergy.com/hubfs/Mosaic%20Extreme%20Heat%20Feature%20Image.png --- [Fluence Energy Home ![Fluence Energy](https://fluenceenergy.com/wp-content/themes/fluence/assets/svg/static/branding/site-logo--color.svg)](https://fluenceenergy.com/) Menu Close - [Energy Storage](https://fluenceenergy.com/energy-storage-technology/) - [Smartstack](https://fluenceenergy.com/smartstack-energy-storage/) - [Gridstack Pro](https://fluenceenergy.com/gridstack-pro-energy-storage/) - [Gridstack](https://fluenceenergy.com/gridstack-grid-energy-storage/) - [Services](https://fluenceenergy.com/energy-storage-services/) - [Nispera APM](https://fluenceenergy.com/nispera-energy-asset-performance-management-software/) - [Mosaic Bidding](https://fluenceenergy.com/mosaic-intelligent-bidding-software/) - [Sustainability](https://fluenceenergy.com/sustainability/) - [About](https://fluenceenergy.com/about/) - [Our Story](https://fluenceenergy.com/about/our-story/) - [Leadership](https://fluenceenergy.com/about/leadership/) - [Safety](https://fluenceenergy.com/committed-to-safety/) - [Fluence in Taiwan (繁體中文)](https://fluenceenergy.com/taiwan/) - [Fluence in Japan (日本)](https://fluenceenergy.com/japan/nispera-energy-asset-performance-management-software/) - [Contact](https://fluenceenergy.com/contact/) - [Investors](https://ir.fluenceenergy.com/) - [Media Room](https://fluenceenergy.com/about/media-room/) - [Blog](https://blog.fluenceenergy.com/) - [Resources](https://fluenceenergy.com/renewable-energy-storage-knowledge-resources/) - [Careers](https://fluenceenergy.com/energy-storage-careers/) - Login - [Mosaic for CAISO](https://markets-caiso.amsarmada.com/caiso/login) - [Mosaic for the NEM](https://markets.amsarmada.com/markets/login) - [Mosaic for ERCOT](https://markets-ercot.amsarmada.com/ercot/login) - [Investors](https://ir.fluenceenergy.com/) - [Media Room](https://fluenceenergy.com/about/media-room/) - [Blog](https://blog.fluenceenergy.com/) - [Resources](https://fluenceenergy.com/renewable-energy-storage-knowledge-resources/) - [Careers](https://fluenceenergy.com/energy-storage-careers/) - Login - [Mosaic for CAISO](https://markets-caiso.amsarmada.com/caiso/login) - [Mosaic for the NEM](https://markets.amsarmada.com/markets/login) - [Mosaic for ERCOT](https://markets-ercot.amsarmada.com/ercot/login) [Fluence Energy Home ![Fluence Energy](https://fluenceenergy.com/wp-content/themes/fluence/assets/svg/static/branding/site-logo--color.svg)](https://fluenceenergy.com/) - [Energy Storage](https://fluenceenergy.com/energy-storage-technology/) - [Smartstack](https://fluenceenergy.com/smartstack-energy-storage/) - [Gridstack Pro](https://fluenceenergy.com/gridstack-pro-energy-storage/) - [Gridstack](https://fluenceenergy.com/gridstack-grid-energy-storage/) - [Services](https://fluenceenergy.com/energy-storage-services/) - [Nispera APM](https://fluenceenergy.com/nispera-energy-asset-performance-management-software/) - [Mosaic Bidding](https://fluenceenergy.com/mosaic-intelligent-bidding-software/) - [Sustainability](https://fluenceenergy.com/sustainability/) - [About](https://fluenceenergy.com/about/) - [Our Story](https://fluenceenergy.com/about/our-story/) - [Leadership](https://fluenceenergy.com/about/leadership/) - [Safety](https://fluenceenergy.com/committed-to-safety/) - [Fluence in Taiwan (繁體中文)](https://fluenceenergy.com/taiwan/) - [Fluence in Japan (日本)](https://fluenceenergy.com/japan/nispera-energy-asset-performance-management-software/) - [Contact](https://fluenceenergy.com/contact/) About Fluence is enabling the global clean energy transition with market-leading energy storage products and services, and digital applications for renewables and storage. [Learn More](https://fluenceenergy.com/about/) #### Get to know us - [Our Story](https://fluenceenergy.com/about/our-story/) - [Leadership](https://fluenceenergy.com/about/leadership/) - [Safety](https://fluenceenergy.com/committed-to-safety/) - [Fluence in Taiwan (繁體中文)](https://fluenceenergy.com/taiwan/) - [Fluence in Japan (日本)](https://fluenceenergy.com/japan/) #### Connect With Us - [Follow us on LinkedIn ![LinkedIn](https://fluenceenergy.com/wp-content/themes/fluence/assets/svg/static/social-round/linkedin-circle-icon.svg)](https://www.linkedin.com/company/fluenceenergy) - [Follow us on Facebook ![Facebook](https://fluenceenergy.com/wp-content/themes/fluence/assets/svg/static/social-round/facebook-circle-icon.svg)](https://www.facebook.com/fluenceenergy/) - [Follow us on Twitter ![Twitter](https://fluenceenergy.com/wp-content/themes/fluence/assets/svg/static/social-round/twitter-circle-icon.svg)](https://twitter.com/fluenceenergy) ![](https://fluenceenergy.com/wp-content/uploads/2022/06/Mega-Menu-Nispera-1200x999px.jpg) ![](https://fluenceenergy.com/wp-content/uploads/2020/07/icon.png) ### Nispera is now part of Fluence. [Read more](https://blog.fluenceenergy.com/how-ai-and-machine-learning-are-driving-value-in-a-clean-energy-future) ## Products Fluence offers an integrated ecosystem of products, services, and digital applications across a range of energy storage and renewable use cases. #### Energy Storage - [Gridstack](https://fluenceenergy.com/gridstack-grid-energy-storage/) - [Ultrastack](https://fluenceenergy.com/ultrastack-transmission-energy-storage/) - [Sunstack](https://fluenceenergy.com/sunstack-solar-energy-storage-system/) - [Edgestack](https://fluenceenergy.com/edgestack-commercial-energy-storage/) #### Software - [Mosaic](https://fluenceenergy.com/mosaic-intelligent-bidding-software/) - [Nispera](https://fluenceenergy.com/nispera-energy-asset-management-software/) - [![Energy Storage Systems](https://fluenceenergy.com/wp-content/uploads/2022/08/Energy-Storage.jpg)](https://fluenceenergy.com/gridstack-grid-energy-storage/) [Energy Storage Systems](https://fluenceenergy.com/gridstack-grid-energy-storage/) - [![Intelligent Bidding](https://fluenceenergy.com/wp-content/uploads/2022/08/Intelligent-Bidding.jpg)](https://fluenceenergy.com/mosaic-intelligent-bidding-software/) [Mosaic Intelligent Bidding Software](https://fluenceenergy.com/mosaic-intelligent-bidding-software/) - [![Asset Performance](https://fluenceenergy.com/wp-content/uploads/2022/08/Asset-Performance.jpg)](https://fluenceenergy.com/nispera-energy-asset-management-software/) [Nispera Asset Performance Management Software](https://fluenceenergy.com/nispera-energy-asset-management-software/) Our Technology Our standardized Technology Stack makes it easier for you to rapidly and cost effectively deploy energy storage, and optimize storage and renewable assets. 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[Learn More](https://fluenceenergy.com/energy-storage-technology/) - [![](https://fluenceenergy.com/wp-content/uploads/2026/02/fluence-smartstack.jpg)](https://fluenceenergy.com/smartstack-energy-storage/) [Smartstack](https://fluenceenergy.com/smartstack-energy-storage/) - [![](https://fluenceenergy.com/wp-content/uploads/2023/10/gridstack-pro-nav-2.png)](https://fluenceenergy.com/gridstack-pro-energy-storage/) [Gridstack Pro](https://fluenceenergy.com/gridstack-pro-energy-storage/) - [![Gridstack Energy Storage](https://fluenceenergy.com/wp-content/uploads/2023/03/Gridstack-Mega-Menu.png)](https://fluenceenergy.com/gridstack-grid-energy-storage/) [Gridstack](https://fluenceenergy.com/gridstack-grid-energy-storage/) #### November 21, 2023 # How Fluence Mosaic Helped Stabilize the Grid and Maximize Customer Revenue Amid California's Late Summer Heatwave #### By Gary Cate, Senior Manager, Market Design and Analytics, and Drew Skau, Principal Product Manager, Fluence Extreme heat events are becoming the norm. This past summer in the U.S. alone, several states experienced week-long stretches of abnormally high temperatures. In fact, July 2023 was the hottest month ever recorded on Earth. These events stretch power grids to their limits, requiring an all-hands-on-deck approach from power generation resources to keep the lights on. With their inherent flexibility, energy storage assets can play a critical role in renewable energy shifting to peak demand times and supporting grid stability. During times of extreme weather, accurate price forecasting and bid optimization are even more crucial to owners and operators of storage assets that are looking to help keep the grid stable, serve load, and maximize revenue at the same time. As electricity generation from renewable energy sources continues to increase and replace carbon-emitting thermal generation on the [California Independent System Operator (CAISO)](https://www.caiso.com/Pages/default.aspx) grid, it is making the grid cleaner but also creates challenges in integrating this power. First, it’s hard to fully make use of this energy due to California’s infamous “duck curve” - a glut of renewable generation when the sun is high and lower generation when the sun is down, but demand is high. In addition, the second-by-second uncertainty and fluctuation in renewables generation from environmental conditions make it challenging to anticipate when renewable energy will be available. During periods of extreme heat across the CAISO region, these problems are further exacerbated by substantial increases in load.   [Energy storage](https://fluenceenergy.com/energy-storage-technology/), as a flexible, bi-directional asset class, is a crucial part of solving these problems. However, fully leveraging it at scale requires advanced electricity price forecasting and advanced bid optimization to know when and how to use storage at scale on the grid. Owners and operators of utility-scale storage assets are increasingly turning to [automated bid optimization tools](https://fluenceenergy.com/mosaic-intelligent-bidding-software/) integrated with price forecasting to help balance the grid and realize the revenue benefits of doing so.     [![Click me](https://no-cache.hubspot.com/cta/default/2810531/fe59a6f4-46e3-496f-9c5c-bcbb8a39f311.png)](https://cta-redirect.hubspot.com/cta/redirect/2810531/fe59a6f4-46e3-496f-9c5c-bcbb8a39f311)   In one period of extreme heat this summer on August 16, [Fluence Mosaic](https://fluenceenergy.com/mosaic-intelligent-bidding-software/)™, our bid optimization software, helped CAISO meet load and frequency control and helped customers earn over $3,700/MW throughout the day by anticipating the volatility and adjusting bid schedules appropriately. Let’s examine this extreme weather event, when above-average temperatures brought extremely tight conditions to CAISO, especially in certain times of the day, such as hour ending 20 (HE20) when Day-Ahead Resource Adequacy (DA RA) capacity was mere MWs above the forecasted net demand.   ### Chart 1: CAISO RA Capacity vs. Net Demand and Reserves for Aug. 16, 2023 ![graph_1-1](https://blog.fluenceenergy.com/hs-fs/hubfs/graph_1-1.png?width=1000&height=397&name=graph_1-1.png) These tight conditions in this hour were largely due to the timing of when solar production declines versus when overall demand begins to decline.   ### Chart 2: CAISO Solar Generation for Aug. 16, 2023 ![graph_2-1](https://blog.fluenceenergy.com/hs-fs/hubfs/graph_2-1.png?width=1000&height=422&name=graph_2-1.png) In chart 2, we can see that the solar generation ramps up starting at 6:00, reaching a peak at noon, and ramps down until 19:30. However, the demand peaks between 18:00 and 21:00 as shown in chart 1. And so, by 19:30, there is no solar generation to serve the rise in demand. This is where energy storage really shines in these conditions and helps make up the difference by time-shifting energy that was produced earlier in the day to the tight times later in the day.     ### Chart 3: CAISO Supply for Aug. 16, 2023 ![graph_3-1](https://blog.fluenceenergy.com/hs-fs/hubfs/graph_3-1.png?width=882&height=437&name=graph_3-1.png) Energy storage operators face challenging decisions when operating in market conditions like these where demand peaks when renewable generation is not available. Pre-set strategies for product participation can often miss critical moments like this and fail to help the grid meet demand. Quality forecasting and optimization can produce strategies that automatically change to meet the needs of the grid as market conditions change, both helping the grid maintain stability and the storage operator capture revenue. [Mosaic for CAISO](https://fluenceenergy.com/energy-bidding-software-caiso/) works hard to solve these problems for energy storage operators. Mosaic’s node-specific price forecast models use machine learning and a carefully curated blend of exogenous variables to predict market prices with uncertain information across a 72-hour horizon. These forecasts are fed into multi-day stochastic optimizations tuned to maximize revenue across the full optimization horizon while staying within the contractual, operational, and strategic constraints as defined by the storage operator. This approach to energy storage bidding leads to market participation that can successfully capture changing market opportunities and help provide maximal value to the grid.   ### Mosaic Day-Ahead Price Forecast for Aug. 16, 2023 ![Graph 4 Mosaic Day Ahead Forecast for August 16_v2](https://blog.fluenceenergy.com/hs-fs/hubfs/Graph%204%20Mosaic%20Day%20Ahead%20Forecast%20for%20August%2016_v2.png?width=1000&height=268&name=Graph%204%20Mosaic%20Day%20Ahead%20Forecast%20for%20August%2016_v2.png) Turning back to the heatwave on August 16, Mosaic’s price forecast models predicted high prices for energy (orange line), regulation up (green line), and spin (blue line) products in the evening hours, with a peak in HE20 (Hour Ending 20: 19:00 – 20:00 PST).   In this situation, it may seem intuitive to discharge the resource in HE20 to capture the high energy price. However, this isn’t necessarily capturing the most revenue, nor is it leveraging the capabilities of the resource to assist the grid. As chart 5 shows, Mosaic’s optimization identified that the best pathway was to offer regulation up in the two highest-priced energy hours of the day. The orange line shows the energy schedule, green bars show the range of possible regulation up dispatch, blue bars show the range of possible spin dispatch, and the purple bars show the range of possible regulation down dispatch.   ### Mosaic Day-Ahead Awards for Aug. 16, 2023 ![Graph 5 Mosaic Day Ahead Awards for August 16_v4](https://blog.fluenceenergy.com/hs-fs/hubfs/Graph%205%20Mosaic%20Day%20Ahead%20Awards%20for%20August%2016_v4.png?width=1000&height=273&name=Graph%205%20Mosaic%20Day%20Ahead%20Awards%20for%20August%2016_v4.png) The optimization considers the hourly expected throughput from regulation, with HE19 set at 12.12% of awarded capacity and HE20 set at 15% of awarded capacity for this resource on this day. That means this decision is optimal for two main reasons: 1. The regulation up price is very close to the energy price, so the revenue generated from the energy throughput that will come from the regulation up dispatch will make up the difference between the regulation up price and energy price. 2. The reduced throughput of regulation up as compared to an energy discharge of the same award quantity means the energy storage retains more energy to sell in later hours (HE21 & HE23), still at very attractive prices. On balance, this schedule generated more revenue than a strategy that just assumes it is best to discharge in the top-priced energy hours of the day. It also extended the services the storage can provide to the grid, meeting more needs across more intervals. There is prohibitive complexity in making these decisions manually across energy and ancillary services products while also considering market rules like Resource Adequacy (RA), CAISO’s own model of state of charge (SOC), an asset’s contractual obligations, warranty limitations, an organization’s risk tolerances, and maintaining a feasible solution based on a more realistic model of SOC. All this complexity necessitates algorithmic-based decision making to truly find the optimal schedule for a day. ![Fluence Gridstack Array_3](https://blog.fluenceenergy.com/hs-fs/hubfs/Fluence%20Gridstack%20Array_3.jpg?width=1000&height=667&name=Fluence%20Gridstack%20Array_3.jpg) Heatwaves have become the new normal, with extreme temperatures becoming increasingly frequent. These occurrences put power grids under tremendous strain, demanding a collaborative effort from power generation resources to ensure uninterrupted electricity supply. With their inherent flexibility, energy storage assets can play a critical role in renewable energy shifting to peak demand times and supporting grid stability. As an experienced technology provider with a strong presence in CAISO, Fluence helps customers simplify these complex bidding decisions. ## Want to unlock the full revenue potential of your energy storage with bid optimization solutions?   [![Let's Talk](https://no-cache.hubspot.com/cta/default/2810531/189a269c-b5c6-4411-a30f-d9ae1be8fac5.png)](https://cta-redirect.hubspot.com/cta/redirect/2810531/189a269c-b5c6-4411-a30f-d9ae1be8fac5) ##### Share - - - ![](https://blog.fluenceenergy.com/hubfs/Drew%20Gary%20Author%20Photo.png) Gary Cate is the Senior Manager of Market Design and Analytics at Fluence. With over 17 years of experience in energy, Gary brings a wealth of knowledge from his tenure at the Southwest Power Pool, where he led the teams responsible for energy market design, implementation, and performance analysis. At Fluence, he is instrumental in developing and ensuring compliance of software offerings with RTO/ISO market implementations. Drew Skau, Ph.D. manages Fluence’s Mosaic bid optimization product for the Americas. He’s interested in optimizing the use and creation of renewable energy resources to accelerate elimination of greenhouse gas emissions. He has over a decade of software experience and has deep expertise in data visualization and user experience. ### Get the latest news ## Related Posts #### [Industry Trends June 3, 2026 Building the Power Blueprint for Tomorrow's AI Factories](https://blog.fluenceenergy.com/building-the-power-blueprint-for-tomorrows-ai-factories) #### [Industry Trends May 26, 2026 Beating the Benchmark: Evolving Energy Storage Bidding in the US](https://blog.fluenceenergy.com/beating-bidding-benchmark-evolving-energy-storage) #### [Industry Trends April 7, 2026 More Power, Less Waiting: Why Storage is the Secret to AI Scalability](https://blog.fluenceenergy.com/more-power-less-waiting-why-storage-the-secret-ai-scalability) ## Most Popular #### [Industry Trends April 7, 2026 More Power, Less Waiting: Why Storage is the Secret to AI Scalability](https://blog.fluenceenergy.com/more-power-less-waiting-why-storage-the-secret-ai-scalability) #### [Industry Trends July 17, 2025 How Fluence's Dispatchable Energy Guarantee Drives Improved Market Outcomes](https://blog.fluenceenergy.com/fluence-dispatchable-energy-guarantee-drives-improved-market-outcomes) #### [Industry Trends January 7, 2025 Powering Intelligence: How Energy Storage is Enabling the AI Revolution](https://blog.fluenceenergy.com/powering-intelligence-how-energy-storage-enabling-ai-revolution) ### Connect - [LinkedIn](https://www.linkedin.com/company/fluenceenergy) - [Twitter](https://www.facebook.com/fluenceenergy/) - [YouTube](https://twitter.com/fluenceenergy) Copyright © 2026 Fluence. 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Website by ```json { "@context" : "https://schema.org", "@type" : "BlogPosting", "author" : { "@type" : "Person", "name" : "Gary Cate, Senior Manager, Market Design and Analytics, and Drew Skau, Principal Product Manager, Fluence", "url" : "https://blog.fluenceenergy.com/author/gary-cate-senior-manager-market-design-and-analytics-and-drew-skau-principal-product-manager-fluence" }, "dateModified" : "2023-11-27T20:48:47.211Z", "datePublished" : "2023-11-21T15:11:05.000Z", "headline" : "How Fluence Mosaic Helped Stabilize the Grid and Maximize Customer Revenue Amid California's Late Summer Heatwave", "image" : [ "https://blog.fluenceenergy.com/hubfs/Mosaic%20Extreme%20Heat%20Feature%20Image.png" ], "mainEntityOfPage" : { "@id" : "https://blog.fluenceenergy.com/how-mosaic-stabilize-grid-maximize-customer-revenue-amid-california-summer-heatwave", "@type" : "WebPage" }, "publisher" : { "@type" : "Organization", "logo" : { "@type" : "ImageObject", "url" : "//blog.fluenceenergy.com/hubfs/Fluence_logo_with_copyline_WEB.png" }, "name" : "Fluence" } } ```