Generally, integrated solar combined cycle power stations combine the energy harvested from solar radiation with another fuel to cut fuel costs and environmental impact. <...> The example described below investigates the conversion of a Western Australia power plant into an integrated solar combined cycle plant using a solar tower and thermal storage. <...> With operators looking for the most cost effective power generation possibility, the use of renewable energy sources in existing assets or new hybrid plants is appealing. <...> Renewable energy technologies, such as concentrated solar power (CSP), progressed significantly in the past decade in regard to efficiency and cost. <...> However, when making investment decisions without including external costs for fossil fuels or government incentives for renewable electricity, the current economic climate favors natural gas-fired open cycle gas turbines (OCGT) and combined cycle gas turbines (CCGT) plants when compared to concentrated solar power installations. <...> To lower the specific investment of CSP systems and prepare for rising natural gas prices in the future, existing OCGT and CCGT plants could be retrofitted and new plants designed with a CSP component. <...> This would create environmental benefits, such as carbon intensity reduction, as well as economic benefits, such as lower investment CSP installations and renewable energy certificates. <...> Of particular interest is the retrofit of solar towers to reduce cost and allow independent operation of CCGT and CSP component. <...> Current ISCC plants use parabolic trough systems with thermal oil to boost the steam output of the CCGT’s heat recovery steam generator (HRSG). <...> Thermal storage would be valuable to provide solar generated electricity during peak demand times in the evening, but the currently high costs for thermal storage of 90 $/kWhth makes it hard to justify this investment without a premium on power dispatchability. <...> Typically, daytime electricity prices are significantly higher than nighttime prices. <...> This fits well with integrated solar combined cycle (ISCC) concepts, since they provide additional solar generated electricity during the day and evening period, which helps recover the higher specific CSP investment. <...> ISCC requirements ISCC plants seem <...>