Energy Services
Measurement & Verification
Proving the savings actually happened, to a standard your CFO and your utility will both accept.
Every efficiency proposal projects savings. Measurement and verification is the discipline of determining whether those savings materialised — and it is the difference between a claim and a documented result. If you are financing a project against projected savings, M&V is not optional; it is the mechanism the financing depends on.
The IPMVP framework
The International Performance Measurement and Verification Protocol, maintained by the Efficiency Valuation Organization, is the global standard for quantifying energy savings. It defines four options, and choosing the right one is the first substantive decision in any M&V plan.
- Option A — Retrofit isolation, key parameter measurement. The critical parameter is measured, others estimated. Standard for lighting retrofits: measure the power draw, estimate the operating hours.
- Option B — Retrofit isolation, all parameter measurement. Every relevant parameter measured. More costly, more certain.
- Option C — Whole-facility. Savings determined from whole-building utility data. Appropriate when several systems were addressed at once.
- Option D — Calibrated simulation. An energy model, calibrated against actual consumption, determines savings. Used where no reliable baseline exists.
Matching rigour to project value
The M&V approach should be proportionate. A straightforward lighting retrofit is typically well served by Option A — the power draw is measurable and the operating hours are knowable — and paying for Option B rigour on that project spends money to reduce uncertainty that was never material.
Larger or performance-contracted projects, where payment depends on verified savings, justify the additional cost of measuring more. We size the M&V plan against what is actually at stake rather than defaulting to the most expensive option.
The baseline is where projects go wrong
Savings are the difference between what a building would have used and what it did use — which means the baseline is doing most of the analytical work, and a weak baseline invalidates everything downstream.
Baselines must be adjusted for things that changed but had nothing to do with the project: weather, occupancy, operating hours, production volume, added equipment. A retrofit that appears to underperform because the building added a shift is not an underperforming retrofit. Getting these adjustments defined and agreed before installation — not argued about afterwards — is the single most valuable thing an M&V plan does.
What you receive
A written M&V plan before work begins, stating the option, the baseline, the adjustment factors and the reporting period. Then verification reporting against that plan, in a form your finance team can audit and your utility will accept for custom incentive programs.
Common questions
Do we need formal M&V on a lighting retrofit?
If you are paying cash and the project is straightforward, basic Option A verification is usually proportionate. If you are financing against projected savings, entering a performance contract, or applying to a custom utility incentive program, formal M&V is typically required — and it is what protects you if results fall short.
How long should the reporting period run?
Twelve months is common, because it captures a full seasonal cycle. Shorter periods can work for measures with no seasonal variation. Performance contracts often specify multi-year verification tied to the payment schedule.
What if verified savings come in below projection?
That is precisely what M&V exists to reveal. The reasons are usually identifiable — operating hours differed from assumption, controls were not commissioned properly, or the baseline needed an adjustment nobody anticipated. Under a performance contract the shortfall is typically the contractor's liability, which is the point.
Ready to talk about your project?
Tell us what you need and we will give you a straight answer on scope, schedule and cost. No obligation, and no pressure if it turns out we are not the right fit.