The right configuration, from first site to full portfolio.
Sizing & Scaling
Catalyst finds the optimal storage size for every project - including when it shares a grid connection with PV or wind - and keeps every project in your pipeline on the same physics-based methodology, so results stay comparable as you grow.
Trusted by leading developers and portfolio managers
The Problem
Why Spreadsheets Break Down as Your Pipeline Grows
A single BESS configuration is hard enough to size correctly in Excel - degradation, ramp rates, multiple revenue streams, all interacting. Multiply that by ten, twenty, fifty projects, each with its own spreadsheet and its own assumptions, and portfolio comparison becomes guesswork. Teams either freeze at the first sizing decision or lose the ability to compare projects consistently as the pipeline scales - exactly when investors and lenders start asking for portfolio-level reporting.
The Solution
One Model, Every Configuration, Every Project
Catalyst runs hundreds of storage configurations per project automatically, ranks them by NPV and IRR, and applies the exact same degradation, dispatch, and market assumptions across every project you add - from first site screening to the fiftieth portfolio asset. Sizing decisions and portfolio decisions run on one consistent, auditable model.
Sizing at the Shared Connection
Sizing at the shared grid connection.
When a battery shares a connection with PV or wind, the question isn't how big can the battery be - it's what share of the connection, and what duration, turns the shared headroom into the most value. Catalyst answers that with a sweep across power and duration, not a single assumption.
Example Results achieved with Catalyst
40% / 3h
PV Co-Location
Optimal storage share of grid connection and duration - Greentech case study.
2h
Wind Co-Location
NPV-maximising duration in 4 of 5 modelled scenarios - Fluence case study.
400 MWh
Tri-Location
Battery size reaching the efficient VALCOE frontier - Maxsolar case study.
“In the Greentech case study, a realizable design near 45% of the grid connection at roughly 2.8 hours duration captured most of the available uplift without materially increasing CapEx.”
Configurations
Exact Results for Every Project Setup
Most Frequently Modelled
The Market
Pipelines Are Growing Faster Than the Tools to Manage Them
Competition for limited grid capacity
Suitable locations are becoming scarcer. Whoever has reliable sizing numbers earlier secures the site.
Growing project pipeline
More projects mean more variables - without scalable software, teams lose oversight.
Hybrid revenue stacks as standard
FCR, aFRR, DA, and EEG cooperation must be sized together - not project by project, in isolation.
The Platform
Catalyst - techno-economic BESS modeling.
Purpose-built for battery storage. All revenue streams, physics-based degradation, and auditable outputs - in one consistent model.
Multi-Market
FCR · aFRR · DA · Intraday · EEG
Variability
Parametric scenarios per run
Auditability
Bankable, verifiable outputs
Traceability
Every dispatch interval traceable
Key Features
For teams that need pipeline depth with consistent methodology.
Catalyst gives project development and portfolio teams the analytical depth to move quickly without sacrificing quality. Each scenario run covers the full revenue stack - FCR, aFRR, day-ahead trading, and EEG cooperation - while accounting for battery degradation on a monthly basis, and applies identically whether you're sizing one site or comparing fifty.
Scenario Analysis in Minutes
Hundreds of scenarios per run, automatically ranked by NPV and IRR - for a single project or your whole pipeline at once.
Consistent Degradation & Dispatch
Calendar and cycle degradation modeled monthly per real battery chemistry, with the exact same physics applied whether it's project #1 or project #50.
Portfolio-Wide Stress Test
Test every project in the portfolio under the same market scenario simultaneously - see instantly which configurations hold up.
From First Site Screening to Full Portfolio Reporting
Whether you are evaluating a greenfield site, comparing technology options, screening an acquisition, or reporting to your board, Catalyst adapts to your stage - all outputs are produced from a single, consistent model, so results remain fully comparable and audit-ready as your pipeline grows.
Site Screening
Quickly compare multiple locations and identify the most profitable options - before expensive assessments are commissioned.
Technology Comparison
LFP vs. NMC, various C-rates, different system sizes - all variants in one consistent model.
Acquisition Screening
Quickly check new project opportunities - built or bought - for portfolio compatibility and return expectations.
Portfolio-Wide Sensitivity Analysis
How does portfolio value change if the electricity price rises? Catalyst gives you the answer in minutes, across every asset.
Ranking by Return Criteria
NPV, IRR, DSCR - automatically calculated and ranked for all projects at once.
Quarterly Reports & Investor Updates
Consistent metrics for all projects at the push of a button - for board presentations and LP reporting.
Customer Stories
See how our customers use Catalyst
Real projects, run through the model - wind, PV, and portfolio-scale co-location, sized and stress-tested.
Next Step
Your next sizing decision - fast, consistent, ready to scale.
No generic demo - your site, your pipeline, your numbers.