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Validate Interconnection in Minutes, not Months

Felix helps energy infrastructure teams find viable sites, de-risk development, and get to power faster.

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Proven Impact in Grid Transformation

Our ISO-accurate tools empower transmission teams to de-risk interconnection and accelerate grid transformation. With over 700 GW modeled and a 97%+ accuracy rate, Felix has uncovered $5B+ in cost discrepancies to help 100+ developers secure a faster path to power.

Cost discrepancies identified

>$5B

Developers Use Felix

100+​

GW Projects Modeled

700+

Accuracy in results

>97%

We equip transmission planning teams with transparent, ISO–accurate tools to de-risk interconnection and enable efficient grid transformation.
FelixFusion
ISO-Aligned Methodology

We replicate ERIS and NRIS studies, not FCITC approximations.

Intelligent Insights

Developed by engineers who’ve worked at ISOs, utilities, and top developers.

Proven at Scale

500+ GW modeled. $3B+ in ISO errors uncovered. 100+ developers trust us.

Products that scale clean energy projects

Felix supports generation and load developers, transmission planning engineers, utility teams, and ISOs by streamlining study processes and enabling transparent, aligned decision-making across stakeholders. Paces helps energy infrastructure teams find viable sites, de-risk development, and get to power.

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Generation Developers

  • Enable Generation Developers to make smarter siting and queue decisions
  • Increase success rates and reduce wasted capital
  • Directly accelerates projects reaching operation
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Load Developers

  • Enable large loads to enter the queue more efficiently and transparently
  • Find build-ready sites with the fastest path to power
  • Evaluate impacts of competitor projects and de-risk future buildout
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Load Dev
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Independent Power Producers

  • Make confident development and interconnection decisions across your portfolio
  • De-risk new projects with ISO-accurate cost and capacity certainty before you commit capital
  • Compare sites, queue positions, and expansion options on one transparent platform
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Development Process Designed for Visibility

Headroom Capacity
Find viable sites faster using real-time substation capacity and upgrade cost data.
  • Enable Generation Developers to make smarter siting and queue decisions
  • Increase success rates and reduce wasted capital
  • Directly accelerates projects reaching operation
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Local Studies Tool
  • Enable Generation Developers to make smarter siting and queue decisions
  • Toggle local queue assumptions across flexible, across numerous custom scenarios
  • Re-runs full ISO study methodology for fast, accurate results
  • Compare scenarios based on knowledge of competing projects in the queue
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Ready to De-Risk Your Next Project ?

Frequently Asked Questions

Still have questions?

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How long does a subscription last?
We offer annual subscriptions.
How many users come with a subscription?
Please contact us and we'll work together to find a price that works for your team.
How does the subscription work?
You pick which regions / ISOs you want to subscribe to. There's a different price per region and discounts for multiple regions.
Can we compare your data to studies we've done in the past?
Yes. Before you subscribe, we offer a benchmarking call where we compare Felix results with any studies you've done in the past. If you're interested, please book a demo.
What's the source of your data?
For developers, we request the latest power flow models from each ISO / utility on your behalf to use as the basis of analysis. The data within our applications are the result of ISO and utility-specific power analysis methodologies imposed on top of these models. We use the same software as ISOs and utilities, e.g. PowerGEM’s TARA and Siemens PTI’s PSS/e.n