This paper proposes a solar-assisted method for a petrochemical refinery, considering hydrogen production deployed in Yanbu, Saudi Arabia, as a case study to greenize oil refineries. . But now, a new solution is taking over: off-grid solar power systems, especially containerized PV energy solutions. Diesel Is Expensive and Hard to Maintain Diesel might seem simple, but it's costly — not just in fuel, but in. . Sensible thermal energy storage (TES) system is integrated into the refinery's process heating to handle the intermittent nature of solar energy. Multiple global trends have accelerated interest in off-grid living: Rising Electricity Prices: Consumers worldwide face escalating grid. . Employing solar energy to drive crude oil refineries is one of the investigated pathways for using renewable energy sources to support lowering the carbon emissions and environmental impact of operating the processing of fossil-based fuels. A validated ASPEN HYSYS model was used to investigate the products produced from heavy crude oil in the refinery.