The credit that pays for something hard to measure
45V rewards hydrogen production based on how clean the process actually is, measured in carbon intensity per kilogram of hydrogen produced. The cleaner the production method, the higher the credit value per kilogram. That sliding scale is what makes 45V potentially lucrative for the right project, and it's also what makes it so difficult to underwrite.
Unlike a flat-rate credit, 45V requires proving a carbon intensity number, and that number depends on how the electricity or feedstock used to make the hydrogen was generated. For hydrogen made using grid electricity, that means tracing power sources, timing, and location, an entire discipline of its own that most buyers have never had to evaluate before.
Why the rules kept moving
Since 45V was introduced, the guidance on how to calculate carbon intensity — particularly the "three pillars" framework covering additionality, deliverability, and time-matching for electricity-based hydrogen — has been revised more than once, and industry groups have pushed hard in both directions. Developers relying on renewable power purchase agreements want flexibility on timing. Groups focused on emissions integrity want strict hourly matching.
Every time that guidance shifts, it changes which projects qualify for the top credit tier and which fall into a lower one, or don't qualify at all. That kind of regulatory uncertainty is exactly what makes buyers cautious about committing capital years in advance.
Why the transfer market has stayed thin
Most transferable credit deals depend on a buyer being able to look at a project, confirm it's real, and know roughly what the credit is worth. 45V breaks that model. A buyer purchasing a 45V credit is also, in effect, taking a position on whether the seller's carbon intensity calculation will hold up under IRS scrutiny years later.
That is a very different risk profile than buying a solar ITC or a wind PTC, where the qualifying facts are more straightforward. It's part of why insurance products covering recapture and qualification risk have become a near-standard feature of the few 45V deals that do get done, adding a layer of cost and complexity that most other credits don't require.
What this means for hydrogen developers and buyers
For developers, the message is straightforward: your carbon intensity documentation needs to be built for an audit, not just a filing. That means clean records on power sourcing, timing, and feedstock from day one, not reconstructed after the fact.
For buyers, 45V is not yet a market where you can move quickly. It rewards the counterparties willing to do deep technical diligence and structure around uncertainty, rather than those looking for a straightforward volume trade. Until the carbon intensity rules settle, expect 45V to stay a specialist's credit rather than a mainstream one.