City-based Greenko Energy Holdings, a renewable energy company, announced Monday that it has signed a pact to buy the assets of Pune-based Skeiron Green Renewables in Andhra Pradesh and Karnataka. Also, Greenko said it has already acquired Orange Renewables as was proposed in June, a senior official of Greenko said. The combined deal of Orange and Skeiron would add 1,300 MW of wind and solar power to the overall operational capacity of Greenko to 4.5 GW of wind, solar and hydroelectricity, a press release said.