This article investigates the integration of large-scale solar thermal fields with biomass boilers for district heating (DH) in rural areas, aligning with the principles of 4th Generation DH. Using TRNSYS 17 software, the technical and economic aspects of this integration were analyzed. The technical assessment revealed high specific solar productivities over 850 kWh.m-2 for small solar fractions and a corresponding optimum specific volume of the Thermal Energy Storage (TES). The economic analysis demonstrated the viability of solar installations in various scenarios, with the potential for levelized costs of heat (LCOH) to be under 100 CHF/MWh. Overall, the study concludes that integrating solar thermal systems with wood chip boilers is technically feasible and financially advantageous. However, careful consideration of system configuration and financing is necessary for sustainable and high-performance solutions, ensuring optimal resource utilization and economic viability.