The 10-Year Lookback: How to Claim PA Tier II RECs on Energy Efficiency Projects You've Already Completed

You May Be Sitting on Thousands in Unclaimed REC Revenue

One of the most overlooked aspects of Pennsylvania's Tier II REC program is its retroactive eligibility. Energy efficiency projects completed within the last 10 years can still be registered for RECs — meaning you may have years of unclaimed credits waiting to be monetized.

How the Lookback Period Works

The PA Tier II REC program allows projects to be registered retroactively. Here's what that means in practice:

• Installation date matters: Your project's online date — the date the energy efficiency measures were installed and operational — determines your eligibility window.
• Measure life determines duration: Most energy efficiency measures have a 10–15 year expected useful life. Credits are generated for the remaining measure life from the date of registration.
• Earlier registration = more credits: If you completed an LED retrofit in 2020 with a 12-year measure life, registering today captures 6 remaining years of credits. Wait another year, and you lose one year of revenue permanently.

Real-World Example: The Cost of Waiting

Consider a 100,000 sq ft commercial building that completed a full LED retrofit in 2021:

• Annual savings: 350 MWh → $7,700/year in REC revenue at $22/MWh.
• If registered in 2024: 8 remaining years × $7,700 = $61,600 in lifetime revenue.
• If registered in 2026: 6 remaining years × $7,700 = $46,200 in lifetime revenue.
• Revenue lost by waiting 2 years: $15,400. And that assumes REC prices stay flat — with the ACP cap at $45/MWh, prices could increase significantly.

What Documentation Do You Still Have?

The good news: even projects completed several years ago can be registered if you have reasonable documentation of the work performed. Useful documents include:

Contractor invoices and proposals from the original project.

Utility rebate approval letters (PPL, PECO, FirstEnergy programs).

Before/after utility bills showing reduced kWh consumption.

Equipment spec sheets or cut sheets from the manufacturer.

[Energy monitoring reports](https://kwmetering.com) if submetering was installed.

Photographs of installed equipment (helpful but not required).

Projects Most Commonly Missed

We frequently encounter building owners who didn't realize these projects qualified:

• LED retrofits completed during COVID (2020–2021): Many buildings used low-occupancy periods to complete lighting upgrades. These projects qualify.
• Utility rebate projects: If you received a PPL, PECO, or FirstEnergy rebate, your project almost certainly qualifies for RECs too — they're separate programs.
• Phased upgrades: If you upgraded lighting floor by floor over multiple years, each phase can be registered as a separate project.
• Tenant improvement work: LED and HVAC upgrades completed as part of tenant buildouts qualify if they reduce electricity consumption.

Don't Wait Another Year

Every month you delay registration is revenue permanently lost. The registration process takes 45–60 days on average, so starting now means credits could be flowing within two months.

[Submit your project today](/#submission) for a custom evaluation. We'll review your documentation, estimate your remaining credit production, and handle the entire registration process.