Lowering Home Energy Costs Act

What Happened: On January 29, 2026, Senator Cortez Masto (D-NV) introduced S.3722, the Lowering Home Energy Costs Act, in the U.S. Senate. The bill was read twice and referred to the Committee on Finance, where it remains as of April 30, 2026. This is a standard early-stage legislative action — introduction and referral — with zero floor votes, zero committee hearings, and zero markups to date. The legislative clock for the 119th Congress runs through January 2027, giving this bill approximately 8 months of active window remaining.

The Money Trail: S.3722 does NOT appropriate any new federal spending. It is a tax credit extension bill — it amends the Internal Revenue Code to extend the expiration dates of three existing tax credits: (a) Section 45L New Energy Efficient Home Credit (extends through 2032 from June 2026), (b) Section 25D Residential Clean Energy Credit (extends through 2032 from December 2025), and (c) Section 25C Energy Efficient Home Improvement Credit (reinstates after being repealed by P.L. 119-21; extends through 2032). This is a PARTIAL restoration — the law does not change the credit percentage amounts or caps; it simply stops the expiration clock and reverses a prior repeal. The estimated 10-year revenue cost (tax expenditure) would run tens of billions but is not specified in the bill text. As a Senate-originated tax bill, it must pass both chambers and be signed by the President.

Structural Winners and Losers: The residential solar extension (25D) is the most straightforward — Enphase ($ENPH) and SolarEdge ($SEDG) are pure-play U.S. residential solar equipment manufacturers with direct, dominant market positions. SolarEdge's U.S. residential inverter business and Enphase's microinverter+battery business are the two principal beneficiaries of avoiding a 2025/2026 credit expiration. First Solar is structurally irrelevant to this bill. The 25C restoration is more interesting — it reverses a prior REPEAL of the home improvement credit. Carrier ($CARR) and Trane ($TT) are the two dominant U.S. residential HVAC manufacturers whose heat pump, central AC, and furnace replacement markets are directly subsidized by the restored credit. The 45L construction credit extension benefits homebuilders (D.R. Horton $DHI, Lennar $LEN, Pulte $PHM) indirectly, as it increases the economic incentive to build ENERGY STAR-certified homes, but the credit flows to the builder, not the component manufacturer.

No Market Data Available: No real market data was provided for this analysis. Based purely on structural positioning, the residential HVAC and solar sectors are the most exposed to this legislation. The bill is in a very early stage — no committee schedule, no companion bill in the House, no CBO score, and no projected floor action. Market expectations for the passage of this specific bill should be low. The broader political environment around clean energy tax credits is contentious; the 119th Congress has already repealed the 25C credit once (P.L. 119-21), and this bill attempts to reverse that specific action. Passage probability is uncertain.

Timeline: The bill has 8 months remaining in the 119th Congress. First step: the Senate Finance Committee must hold a hearing and markup. No actions scheduled as of April 30, 2026. A companion bill would need to be introduced in the House; none exists. Reconciliation is mathematically possible (the bill is a tax change) but the current reconciliation instructions do not include it. In all likelihood, this bill requires floor time, which is scarce in an election year (2026 midterms). The realistic timeline for any action is late 2026 at the earliest, with carryover potential if introduced in the next Congress (120th, 2027–2029).