Measurement and Verification

Get the financial statement on your energy-efficiency investment.

Energy-efficiency projects are financial investments. A return of energy and cost savings is expected on an initial up-front investment. Unlike financial investments, however, you do not receive a monthly or quarterly statement detailing exactly how much financial return you're achieving. And, to determine this on your own is extraordinarily difficult. In fact, most energy engineer experts are poorly equipped to measure energy and cost savings over time. This is because energy costs are also dependent on weather, occupancy rates, production, and utility rates. Because of this, energy savings can be hard to discern. As a result, while energy-efficiency can be very economical, there is a large amount of uncertainty in the amount of savings realized. This inhibits corrective actions to under-performing projects, recognition of projects doing well, and thus future investment in energy efficiency. It also allows performance contractors to sell projects and guarantee savings when there are truly none available.

Our firm can quickly and cost-effectively measure energy and cost savings for your project. We do so already for utility programs, government programs, and individual clients. We normalize energy use as a function of weather, occupancy, and/or production, and utility rates to arrive at a true energy and cost savings measurement. There are several ways in which we do this:

From-the-Bill Savings Measurement

Extract useful information from energy data you already have.

Go Sustainable Energy has unique expertise in creating statistical regression models of monthly building energy use as a function of temperature, occupancy, production and other factors. These models serve as excellent baselines for measurement and verification, as the effects of independent variables are normalized. We simply require a minimum of 12 months of pre-installation utility data, and then post-installation utility data. Where occupancy and production are factors, we obtain this information from the client. We typically obtain historical weather data from available sources.

We provide from-the-bill savings measurement for multiple clients, including school districts and several commercial office buildings.

Pre and Post-Metering

We provide equipment-specific pre and post-installation metering. This is often appropriate for utility programs, where the project cost can justify the additional energy metering. Additionally, equipment-specific metering may be warranted if the energy savings are not large enough to significantly affect the facility meter.

Our team uses a range of metering equipment, so that we can fit the right equipment to the right application. Our equipment includes:

  • Combination of spot-power measurements and measured and logged amperage - This is the most economical method of metering electrical equipment. We take spot power readings of amperage, power (kW), and power factor (kW/kVA) at various loads on the equipment. We then measure and log amperage using current transducers (CTs) and data loggers. We use the spot-metering load profile to convert amperage to kW, and then calculate the power and energy savings from pre and post-implementation samplings. Typically we may take 2-week long samples during the pre and post-implementation periods.
  • True power metering - We can measure and log true power as well, with higher accuracy. This equipment is more expensive and more invasive, and thus should only be used when the higher accuracy is required. Many third-party raters for utility rebate programs require this level of accuracy.
  • Unclean power amperage logging - Increasingly, equipment that we meter has a variable-frequency drive (VFD) installed, where electricity is inverted and rectified. This process can produce feedback into the lines which prevent most CTs and true power meters from taking accurate readings. Because of this, we can install amp clamp and meter combinations which can measure and record amperage at various frequencies.
  • Boiler and furnace metering - We combine spot combustion readings with measurement and logging of combustion exhaust temperature with either a CT on the combustion fan or a motor on/off logger on the fan motor. This allows us to effectively measure and record boiler and furnace efficiencies.

    Get your investment statement today.

  • Go Sustainable Energy, LLC | 3709 N High St, Suite 100, Columbus, OH 43214 | (614) 268-4263 | Toll-Free Fax: (866) 623-7716