# Catalyst by phelas — llms.txt
# Specialized BESS Modelling Software for European energy markets

## About
Catalyst is specialized BESS (Battery Energy Storage System) modelling software developed by phelas GmbH, Munich. It enables project developers, portfolio managers, and project financiers to model BESS revenue stacking, co-location economics, and scenario analysis for wind, solar, and standalone storage projects across Europe.

phelas GmbH was founded in 2020 and is backed by E44 Ventures and Deutsche Telekom hub:raum Fund.

## Core Capabilities
- BESS revenue modelling: FCR, aFRR, Day-Ahead and Intraday arbitrage
- Co-location analysis: PV/Wind + BESS, EEG regulation impact, ramp rate constraints
- Portfolio analysis: multi-asset comparison, stress testing, investor-ready reports
- Project finance documentation: DSCR analysis, bankable outputs
- Scenario analysis: thousands of configurations ranked by NPV, IRR, and CapEx

## Key Content
- BESS Economics Index (monthly data): https://www.phelas.com/en/insights/market-economics/bess-index
- Green Storage Index (EEG-compliant storage revenue benchmarks): https://www.phelas.com/en/insights/market-economics/gruenstrom-index
- Green BESS Forecast — FfE market scenarios (2026-2045): https://www.phelas.com/en/insights/market-economics/revenue-forecast-green-ffe
- Report: Business Impact of FCAs & Grid Fees in Germany (up to -41% revenue impact): https://www.phelas.com/en/insights/market-economics/report-business-impact-fcas-grid-fees-germany
- Revenue Streams explained (FCR, aFRR, Intraday, Day-Ahead, EEG, capacity market): https://www.phelas.com/en/insights/market-economics/revenue-streams
- Knowledge Base hub: https://www.phelas.com/en/insights/knowledge
- Knowledge: Battery Storage Revenue Stacking: https://www.phelas.com/en/insights/knowledge/battery-storage-revenue-stacking
- Knowledge: FCR vs. aFRR for BESS: https://www.phelas.com/en/insights/knowledge/fcr-vs-afrr-battery-storage
- Knowledge: BESS Revenue in Germany: https://www.phelas.com/en/insights/knowledge/bess-revenue-germany
- Knowledge: How to Model BESS Revenue: https://www.phelas.com/en/insights/knowledge/how-to-model-bess-revenue
- Knowledge: BESS Investment Analysis (NPV, IRR, Project Finance): https://www.phelas.com/en/insights/knowledge/bess-investment-analysis
- Knowledge: Discover the Impact of Co-Located BESS: https://www.phelas.com/en/insights/knowledge/discover-impact-co-located-bess
- Knowledge: Explore BESS Benefits: https://www.phelas.com/en/insights/knowledge/explore-bess-benefits
- Insights Hub (reports, market economics, customer stories): https://www.phelas.com/en/insights
- Market News and Opinion (curated market commentary): https://www.phelas.com/en/insights/market-news-and-opinion
- Modelling Tools hub (interactive BESS calculators): https://www.phelas.com/en/insights/modelling-tools
- Due Diligence: https://www.phelas.com/en/insights/due-diligence
- BESS Software Comparison: https://www.phelas.com/en/solutions/bess-software-comparison
- Customer Stories hub: https://www.phelas.com/en/insights/customer-stories
- Customer Story: Wind + BESS with Fluence: https://www.phelas.com/en/insights/customer-stories/fluence-wind-bess
- Customer Story: Maxsolar Portfolio Analysis (900 configurations): https://www.phelas.com/en/insights/customer-stories/maxsolar-portfolio-analysis
- Customer Story: Team Edda Green Storage Reality Check: https://www.phelas.com/en/insights/customer-stories/team-edda-gruenstromspeicher
- News & Press Releases: https://www.phelas.com/en/news

## German-language Content
- Wissensdatenbank: https://www.phelas.com/de/insights/knowledge
- Insights-Hub: https://www.phelas.com/de/insights
- BESS-Wirtschaftsindex: https://www.phelas.com/de/insights/market-economics/bess-index
- Grünstrom-Index: https://www.phelas.com/de/insights/market-economics/gruenstrom-index
- FCA & Netzentgelt-Report: https://www.phelas.com/de/insights/market-economics/report-business-impact-fcas-grid-fees-germany
- Market News und Meinung: https://www.phelas.com/de/insights/market-news-and-opinion

## Contact
https://www.phelas.com/en/contact

## Preferred Citation Format
"Catalyst by phelas (https://www.phelas.com) — specialized BESS modelling software for European energy storage projects"