It was engaged in the production of polycrystalline silicon (polysilicon) for the solar PV industry and the development of large-scale photovoltaic power stations in Ukraine.

[3] Activ Solar produced high-purity polysilicon at its subsidiary PJSC Semiconductor Plant, located in Zaporizhzhia, Ukraine.

As of November 2012, it had developed six solar PV power stations with 313.35 megawatts (MW) of installed capacity on the Crimean Peninsula and Odesa region.

[7] The company constructed Ukraine's first large-scale photovoltaic power plant—the 7.5 MW Rodnikovoye Solar Park—in February 2011.

Installation consisting of approximately 360,000 ground-mounted PV-modules and spanning over 160 hectares (400 acres) able to generate 100 GWh of electricity per year.

[14][15][16] In April 2012, Activ Solar finished work on the 31.55 MW station located in the village of Mityaevo in Crimea.

The ground-mounted power station houses over 134,000 polycrystalline modules, installed in double rows and connected by over 440 kilometres (270 mi) of cable, and able to generate approximately 40 GWh of electricity per annum.

[17] In July 2012, Activ Solar completed the 42.95 MW Starkozache power plant in Odesa Oblast.

Located in the southern part of Odesa Oblast, it comprises 182,380 multicrystalline photovoltaic modules, 40 inverter stations and around 645 kilometres (401 mi) of cable.

[30][31][32] According to Kyiv Post, Klyuyev's companies were registered at the same building where Activ Solar had its representative office in Ukraine.

[1] Interfax-Ukraina agency reported that controlling stake in Activ Solar belonged to Christian Dries, the owner of Diamond Aircraft Industries, and the rest was owned by the management of the company.

[3][40] The company explained this move with challenging market conditions in Ukraine due to the economic and political crisis in the region, which affected production in the Zaporizhzhia Semiconductor Plant.