MONEYWEB app instead? Tariff will change according to fluctuations in LNG price. By Moneyweb 13 Apr 2021 00:01 Global demand for LNG is expected to increase due to population growth, urbanisation, and increased preference for cleaner energy. Image: Supplied Governmentâs proposed deal with Karpowership SA to buy electricity generated on its three floating power stations over a period of 20 years will expose consumers to considerable risk. Maduna Ngobeni, acting chief operating officer of the Department of Energyâs office for independent power producers (IPPs), recently confirmed that among other things, fluctuations in the international price of liquefied natural gas (LNG) and the dollar/rand exchange rate will be passed on to consumers.