US DOE 10 CFR 436.37: Federal Solar ESPC Annual Audit Guide
Updated 6 September 2026 · By SolarNevs Research Desk, Dealer surveys + verified sources · 1 source · Method ↗
Key Takeaways
- Title 10 CFR Part 436 Subpart B (§ 436.37) mandates annual energy audits for all federal solar and energy conservation ESPC projects.
- Audits occur immediately following implementation and annually thereafter throughout the entire contract lifecycle.
- Verifies whether contractor-guaranteed energy cost savings have been achieved prior to releasing annual service payments.
- Codifies 4 statutory conditions for energy baseline adjustments: physical building changes, occupancy/hours, plug loads, and weather.
- Administered under the Department of Energy (DOE) Federal Energy Management Program (FEMP).
Statutory Mandate for Annual Audits
Under 10 CFR Part 436 Subpart B, Section 436.37 establishes the measurement and verification (M&V) backbone of federal performance contracting.
Because federal ESPC projects rely on contractor-guaranteed energy reductions to amortize capital costs, annual audits provide legal proof of performance before public funds are disbursed.
Four Statutory Baseline Adjustment Factors
Section 436.37 recognizes that facility conditions change over multi-decade contract terms. The regulation permits baseline revisions exclusively for events beyond the contractor's control:
Statutory Factor | Description & Operational Impact | Regulatory Reference |
|---|---|---|
Physical Changes to Building | Facility expansions, demolition, envelope modifications, or roof alterations | 10 CFR § 436.37(b)(1) |
Hours of Use or Occupancy | Shift changes, mission expansion, increased personnel, or altered operating hours | 10 CFR § 436.37(b)(2) |
Plug Loads | Unanticipated additions of server racks, specialized equipment, or laboratory loads | 10 CFR § 436.37(b)(3) |
Weather Conditions | Abnormally hot summers, extreme winters, or severe solar irradiance anomalies | 10 CFR § 436.37(b)(4) |
Annual Savings Reconciliation Protocol
During each performance year of a federal solar ESPC:
- Telemetry Analysis: Solar kilowatt-hour generation and facility demand reductions are metered in accordance with FEMP M&V guidelines.
- Baseline Normalization: Metered consumption is adjusted for verified weather conditions and occupancy changes using Section 436.37 statutory factors.
- Savings Reconciliation: If reconciled savings equal or exceed the contract guarantee, the agency disburses the annual contractor payment; shortfalls must be credited back to the government.
Frequently asked questions
When must annual energy audits be conducted under 10 CFR 436.37?
Under 10 CFR § 436.37, an annual energy audit must be conducted after contractor implementation of energy conservation measures and annually thereafter during the contract term (August 2026).
What is the primary statutory purpose of the annual energy audit?
The audit determines whether the energy cost savings guaranteed by the contractor have been achieved (August 2026).
What statutory factors permit adjusting the contract energy baseline?
The energy baseline is subject to adjustment for factors beyond contractor control: (1) physical changes to the building, (2) hours of use or occupancy, (3) plug loads, and (4) weather conditions (August 2026).
Who conducts the annual energy audit under § 436.37?
The audit is conducted by the Federal agency or the qualified contractor under FEMP measurement and verification protocols (August 2026).
References
- LII / Legal Information Institute: 10 CFR § 436.37 — accessed 31 August 2026
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