Despite the leaps of advancement in harvesting solar energy, some bottlenecks still limit them from becoming truly sustainable. Two such bottlenecks that need to be overcome are the intermittent energy supply, and effective thermal management of these solar systems. Phase change materials (PCMs) offer a promising solution to both these bottlenecks as they allow for an effective energy storage medium and can serve as excellent thermal management systems. The PCMs employ phases transition (normally solid-liquid) to store large amounts of energy and which can then be extracted when the material solidifies. However, the inherently low thermal conductivity of PCMs restricts their applications as an effective medium for energy storage. Incorporation of thermally conductive nanofillers has been employed for the enhancement of PCM performance but at the expense of high filler loadings and loss in storage capacity. We present the use of hybrid nanofillers with different aspect ratios and their synergistic approach for thermal enhancement of PCMs. Along with a novel system comprising of these enhanced PCMs for passive cooling of solar cells and simultaneous energy production via an Organic Rankine cycle.