Purpose: Demonstration of a process aiming at stabilizing the frequency of a network consisting on distributed loads and intermittent energy sources: Primary Support. A test bench had been configured between the G2Elab (Grenoble, France) and VTT Intelligen tEnergy (Espoo, Finland) to assess the interest of Finnish companies on the concept of frequency support by distributed loads and reinforce the scientific exchanges between both institutions. 8 energy boxes had been deployed on both sites and the frequency had been recorded together with the implementation Context: The development of decentralized renewables in distribution networks may induce some adverse effects for the grid. Due to Distributed Renewable Energy Sources (DRES), power flows are becoming bidirectional and lowering the inertia, increasing the frequency deviations and re ducing the self-healing reaction efficiency of our modern power systems. To be able to accept more and more renewables and integrate them in the best manner into the grid, the development of the smart and flexible grids is required. Flexible grids are achieved by integrating the demand side to interact with the grid and offer their flexibility in the critical times of the grid. Primary Support consists in a platform to provide primary frequency control from distributed re sources. The goal of this project was to validate the technical feasibility of the proposed technology in Finnish regulatory framework. The proposed technology was installed at the IntelligentEnergy testbed at VTT premises in Espoo, Finland. The objective was to test if the technology functions as it is supposed to be and if it fulfils the national prequalification requirements set for Frequency Containment Reserves (Primary Support) in Finland. The piloting had been conducted at the In telligentEnergy testbed with the purpose of participating with marginal resources in the Frequency Containment Reserves. A real participation with revenue generation is not feasible during the demonstration, since it would require a constant power of 100 kW for both directions (up- and down regulation). However, the test enables us to estimate the capability of the technology to pass the real prequalification requirements set by Finnish TSO Fingrid.