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Carbon Lighthouse’s commitment to guarantee revenue and deliver impact over the term of a contract is managed by a dedicated Energy Performance Team. This team is responsible for the ongoing managed energy service, and shares energy performance results on a quarterly and annual basis in terms of dollar savings, energy reductions, and CO2 reductions achieved.Since our savings results come from the absence of energy usage, determining energy performance is not a straightforward calculation. How do we measure something we did not use?
To determine the performance of an implemented Energy Solution, the Energy Performance Team follows industry standard Measurement & Verification (M&V) practices to quantify energy performance. Our methodology is guided by the International Performance Measurement and Verification Protocol (IPMVP) developed by the Efficiency Valuation Organization (EVO), which began in 1994 under a U.S. Department of Energy initiative..As explained in the IPMVP, “M&V is the process of using measurement to reliably determine actual savings created within an individual facility by an energy management program,” such as the Carbon Lighthouse energy service. “Savings cannot be directly measured, since they represent the absence of energy use. Instead, savings are determined by comparing measured use before and after implementation of a project, making appropriate adjustments for changes in conditions.”We refer to the periods before and after implementation of the energy solution as:
Similar to economic data like unemployment rates, we want to evaluate overall energy performance and not be distracted by short-term anomalies. While economists normalize for inflation rates and seasonality in employment, we normalize for weather and utility rates. While trends in weather and utility escalation rates can be predicted, actual conditions during the evaluation period are unpredictable. We determine energy performance based on a “typical, average, or ‘normal’ set of conditions.” This is referred to as the “fixed conditions basis” in the IPMVP.
A combination of system-level key performance parameter measurements, system-level interval meter data, and whole-building or sub-building utility interval meter data may be used. These types and methods of data collection correspond to the IPMVP options A, B, and C for determining savings, respectively.
Our methodology will follow the industry standard M&V practices as they evolve. Given our mission to solve climate change, we are critical about our real impact and take pride in evaluating and improving upon the measured performance of our implemented energy solutions.Read how how to protect your investment with 'savings persistence'. “Concepts and Options for Determining Energy and Water Savings: Volume 1.” International Performance Measurement and Verification Protocol, Efficiency Valuation Organization, January 2012. “Weather Data Sources.” EnergyPlus, U.S. Department of Energy Building Technologies Office, https://energyplus.net/weather/sources.