Updated Features Advance Mepsy’s Energy Efficiency Analysis Abilities

Almost a year after its initial launch, Mepsy received a major update that includes lighting data and compliance rate considerations, giving users even more precise data.

Maggie Mowrer

As energy efficiency achieves more recognition as a fast, cost-effective, and reliable means of mitigating carbon emissions, energy leaders need the ability to prioritize appliance policy options. CLASP’s free tool Mepsy, released last year, can be used to analyze the impact of implementing efficiency policies for some of the world’s top energy-consuming appliances.

“Mepsy is a game-changer for policymakers and analysts, helping these key players make crucial decisions in energy efficiency policy development.” – CLASP Director Matt Malinowski


Two Major Feature Updates

This month, we are excited to announce the addition of lighting and compliance considerations to the Mepsy model. Globally, lighting products account for 15% of all electricity consumption and produce 5% of the world’s greenhouse gas emissions, so improvements to efficiency policy in this sector represent a valuable opportunity for countries trying to meet their energy reduction goals. The lighting module also includes a scenario representing the effects of passing the African Lighting Amendment to the Minamata Convention on Mercury, which focuses on eliminating CFLs and LFLs by 2025.

Like all products in Mepsy, calculations are based on stock, sales, and energy performance data from recent CLASP in-country market studies or country-level estimates from reputable market research firms. Sources and further details can be found in our Methodology and Assumptions document.

Though not an appliance per se, factoring in the policy compliance rate (on a scale from “Low” to “Excellent”) provides more accurate energy consumption and CO₂ projections. High compliance is reached by removing ineffective, outdated products from the market, ensuring that predicted energy and CO₂ reduction figures are reached through the promotion and use of their higher-performing counterparts.

Later in 2022, Mepsy will expand its scope to commercial refrigeration units, refrigerants, residential hot water heaters, and distribution transformers. Sign up for our newsletter at the bottom of this page to receive updates as soon as they happen.

If you are interested in learning more about Mepsy and how it can support your work, register for our free webinar on March 16, “How Mepsy Can Transform Your Energy Efficiency Policy Development”. Additional information about how to use Mepsy and model documentation can be found here:


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