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SOLUTIONS FOR DEVELOPERS

From Thousands of Sites to Build-Ready Projects

Felix gives generation and large-load developers ISO-accurate transmission capacity, upgrade costs, and scenario modeling across every major U.S. market. You can find viable sites, take the risk out of interconnection, and reach power sooner.

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1 + GW
of projects modeled
> 1 %
accuracy against ISO studies
$ 1 B+
in cost discrepancies found
1 +
developers use Felix
Interconnection is where most projects lose time, money, and momentum. The information that decides a project's fate, where real transmission capacity sits and which upgrades a site will trigger, usually stays hidden until you are months and millions of dollars into an ISO study. Generic heatmaps and FCITC screening tools simply cannot show it to you. Felix runs the same ERIS and NRIS study methodology the ISOs use, across every point of interconnection in a region at once. You see the real picture early, so you can screen, rank, and pressure-test sites before you commit capital, whether you are building generation or large load.

What You Need to Stay Ahead

1. Find build-ready sites faster.

Screen more than a thousand substations across an ISO on a single map, color-coded for available capacity and upgrade-cost exposure and refreshed with every model release. You can spot the points of interconnection with real headroom in minutes, with no manual GIS tracing and no waiting on consultant reports.

2. Know your upgrade costs before the ISO does.

Surprise network-upgrade costs are what kill projects. Because Felix replicates ERIS and NRIS methodology, you can see the likely costs and constraints before you put down an interconnection deposit, and act before a restudy wipes out your economics.

3. Pressure-test sites against a moving queue.

Adjust local queue assumptions, add competing projects and new generation, and re-run the full ISO study on your own inputs. Run a hundred what-if scenarios to see how a site holds up as the queue shifts around it.

4. Move with confidence at every stage.

From early prospecting through cluster studies, Felix turns your market knowledge into a clear, site-level view. You advance only the projects you have already de-risked, which protects both your capital and your credibility.

Built for Both Generation and Large Load

Felix gives generation and large-load developers ISO-accurate transmission capacity, upgrade costs, and scenario modeling across every major U.S. market. You can find viable sites, take the risk out of interconnection, and reach power sooner.

Generation Developers:
Make sharper siting and queue calls for solar, wind, and storage. Check your local assumptions and forecast upgrade costs before you file an interconnection request, run AC analysis to each ISO's criteria, and adjust course in real time instead of waiting weeks for every consultant pass.
Load Developers and Data Centers:
Get a region-wide view of capacity for large loads. Screen every point of interconnection, see how a competitor's load or new generation nearby changes what is available, and rule out long-lead sites on day one. That beats discovering in month twelve that a site needs a decade-long 500 kV upgrade, after you have already spent $800K.

Solutions for Developer Workflows

1

Headroom Capacity

Screen every point of interconnection across a region on an on-demand map, color-coded for available capacity and upgrade-cost exposure and updated with each model release. Add your own assumptions to get study results that reflect how you read the market.

Local Studies Tool

Go deep on a shortlist of priority sites. Adjust local queue assumptions, run as many custom scenarios as you need, re-run the full ISO study for fast and accurate results, and compare outcomes based on the projects and loads competing with you in the queue.

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ISO-Aligned Methodology

Felix replicates ERIS and NRIS studies rather than approximating them with FCITC, using the same software as the ISOs and utilities, including PowerGEM’s TARA and Siemens PTI’s PSS®E. It is built by former ISO and utility planners and stays consistent with SPP, PJM, MISO, ERCOT, WECC, Duke, TVA, and Southern Company methodology.

Frequently Asked Questions

Still have questions?

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Why do other tools give me false positives?
Because they approximate. Most screening tools rely on FCITC math or simplified DC models that miss the upgrades you will actually be assigned. Felix runs the ISO's full ERIS and NRIS injection study, so a site that looks clear in Felix is far more likely to clear in the real study.
How quickly can I screen a new region?
Right away. Felix produces study-grade results for every point of interconnection in a region at the same time, so you can build a full capacity-and-cost map in minutes instead of waiting weeks for each site.
Can I model what competitors or nearby loads might do to my site?
Yes. You can test how a competing project, or a competitor placing a large load at a nearby point of interconnection, changes your available capacity and which constraints it triggers. Your timing and location decisions then reflect the queue around you.
Can I use my own market assumptions?
Yes. Your view of queue drop-offs, retirements, and planned transmission upgrades goes straight into the model and applies across every point of interconnection in the region at once.
Which markets do you cover?
Every major U.S. market. You subscribe to the regions and ISOs you need, with pricing per region and discounts when you take more than one. Get in touch and we will confirm current coverage.
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Ready to take the risk out of your next project?