The Watt You Can Prove

There is a number buried inside every utility's books that almost no one outside the industry has ever heard of, and it quietly governs hundreds of millions of dollars. It is called the realization rate. When a company like Eversource or National Grid runs an energy-efficiency program — the rebates and incentives behind every heat pump, every insulation job, every weatherized triple-decker under a banner like Mass Save — they report how much energy those measures saved. Then an independent evaluator comes in, samples the work, and applies a discount. They assume, formally and on the record, that some fraction of the claimed savings never actually happened. The surviving fraction is the realization rate, and it is almost never one hundred percent.

Sit with that, because it is the whole story in miniature. The single most consequential fact about a utility's efficiency program is that the regulator does not believe the numbers. Not out of malice — out of structural necessity. The savings are self-reported by thousands of contractors across tens of thousands of homes, and there has never been a trustworthy way to verify each one. So the system was built around distrust: claim high, get discounted, defend what you can. The realization rate is the price a utility pays, every year, for not being able to prove what it did.

Why a utility gets paid to save energy at all

To see why this matters so much to Eversource and National Grid specifically, you have to understand a piece of regulation that turned the energy business upside down. For most of the last century, a utility made money by selling more electricity and gas. Efficiency was the enemy of the income statement. Then states like Massachusetts decoupled utility profit from volume and did something cleverer still: they made efficiency itself a regulated, profit-bearing activity. Under performance incentive mechanisms, a Program Administrator that hits its savings targets earns a return — a reward measured in the tens of millions of dollars — for delivering verified energy savings to the public.

This is the genius and the fragility of the model in one move. It aligned a giant investor-owned utility with the public good: now Eversource genuinely profits when your home burns less gas. But it also means the company's incentive — real money, booked as earnings, defended in front of the Department of Public Utilities — rests entirely on a number that the regulator structurally discounts. The performance incentive is only as strong as the proof underneath it. Weak proof, low realization rate, smaller incentive, and a harder fight in every rate case. The entire reward is gated on verification the industry has never been able to do well.

A utility's efficiency profit is not paid for the work. It is paid for the proof of the work. And the proof is the weakest link in the entire chain.

What proof costs today

Here is how that proof gets manufactured right now, and why it is so expensive. After the measures are installed, the Program Administrator commissions a formal evaluation — the discipline is called EM&V, for Evaluation, Measurement, and Verification. Independent consulting firms are paid handsomely to pull a statistical sample of projects, re-inspect a slice of them, model the engineering, and produce the realization rate that the regulator will accept. It is rigorous, it is necessary, and it is fundamentally an act of expensive estimation after the fact. You cannot re-inspect a hundred thousand homes, so you sample a few hundred and extrapolate, and then everyone argues about whether the sample was representative.

So the utility is paying twice. Once to do the work, and again to prove a discounted version of the work to a skeptical audience — and the proof still arrives months late, sampled rather than complete, and open to challenge. Layer on top of this the equity mandates: regulators increasingly require Program Administrators to demonstrate that they reached income-eligible households, environmental-justice neighborhoods, renters, the hard-to-serve. Proving you saved energy is hard. Proving you saved it for the right people, in the right places, is a second reporting burden stacked on the first, and it runs on the same shaky self-reported foundation.

What Propreti actually changes

This is the exact seam Propreti was built for, and it is worth being precise about what changes. We do not do the retrofit. We do not run the program. We do not replace the EM&V profession or the regulator. What we change is the nature of the record underneath all of it. On Propreti, a saved watt is not a line a contractor typed into a portal weeks later. It is a record born at the moment of the work, anchored to a specific build, and attested by the human with the authority to witness it — the auditor who actually stood in the basement and ran the blower-door test. We call it Proof of Watt, and its defining rule is the same rule that governs everything on this platform: trust is the output, never the input. A watt is born claimed. It earns its way to corroborated, and then to verified, through attestation and evidence — never by assertion.

Think about what that does to the realization rate. The discount exists because the regulator cannot trust an unverified, self-reported, sampled-after-the-fact number. A Propreti-verified watt is none of those things. It is verified at the source, by a named and credentialed human, traceable to a real address and a real chain of makers, with the income-eligibility of the household recorded as part of the same act. It is not a sample to be extrapolated; it is the actual census of what happened, kept as it happened. You are not asking the regulator to believe a model of the work. You are handing them the work's own attested history.

The realization rate is a tax on not being able to prove what you did. A record that proves every watt at the source is how a utility stops paying that tax.

— The regulatory case for the verified watt

And the equity mandate, the second reporting burden, collapses into the first. Because the income-eligible flag lives on the record itself — attested alongside the savings, not assembled later from a separate spreadsheet — proving you reached the right households stops being a forensic exercise. It is already in the ledger. When Cornerstone Inspections attests a weatherization in an income-eligible home in Roxbury and Lumen Systems logs the heat pump that drove a fifty-one percent heating cut, those facts are not two reports filed in two systems. They are one verified record, in one place, ready to be rolled up the moment a filing is due.

Why they stay

I want to be honest about how a company like Eversource or National Grid actually adopts something, because the answer is not that their employees will love scrolling a feed. Utilities do not stick around because a product is delightful. They stick around because their money depends on it. A Program Administrator will come to Propreti the day a verified-savings ledger makes their performance-incentive filing more defensible than the discounted, sampled alternative — and they will never leave, because leaving means going back to a world where the regulator discounts their earnings by default. The lock-in is not engagement. It is dependency on a record that is simply better than the one they have.

This is the principle I keep returning to in everything we build: rent the pipes, own the chain. Eversource and National Grid keep the pipes — the program, the capital, the customer relationships, the regulated franchise. Those are theirs and we have no interest in them. What Propreti owns is the chain: the verified, human-attested record of what was actually built and saved, the one asset in this entire system that gets more valuable the more of it accumulates. The utility runs the program. Propreti becomes the system of record the program's profit depends on. Both win, and only one of them is replaceable.

There is a deeper reason this fits, too. A regulated efficiency program is, at heart, a trust arrangement between adversaries — a for-profit utility, a skeptical regulator, and a public footing the bill — none of whom fully trust the others' numbers. That is precisely the problem a neutral, un-editable, source-attested record solves. Propreti does not take the utility's side or the regulator's side. It keeps one record neither can quietly rewrite, attested by the humans who did the work. In a relationship built on structured distrust, the thing everyone actually wants is a referee no one can buy. The verified watt is that referee.

The energy transition ahead of us will be measured in hundreds of millions of these small, unglamorous acts — a heat pump here, a sealed attic there, a panel upgrade in a triple-decker that has stood for a century. Every one of them is a watt that someone will have to prove. Today that proof is expensive, late, sampled, and discounted. It does not have to be. The companies that figure out how to prove their watts at the source, household by household, will not just file stronger cases — they will own the most valuable dataset in the built world. Eversource and National Grid have a home on Propreti for the simplest reason there is: this is where the watt becomes a watt you can prove.