This paper presents an automated power balancing approach for DC bus voltage regulation in an on-grid solar-wind integrated hybrid microgrid (HMG), assisted by a battery energy storage system (BESS). The latest reported work is limited to either a fixed reduction in the controllable variable (to reduce the source power generation during maximum SoC condition of the battery) or with an adaptive approach but applicable to a single source only. This work has automated the HMG-BESS operation using an adaptive strategy based on real-time battery-SoC condition, applicable to any number of controllable sources in the HMG. In HMG, to ensure a stable operation of the wind energy conversion system and solar photovoltaic system, the control strategy dynamically adjusts power flow by either operating all available sources in OFF-maximum power point mode at high SoC or reducing power supply to the grid at low SoC. Unlike existing studies focusing only on a single-source regulation approach, this work integrates multiple energy sources, enhancing the system’s reliability. Opal-RT RTDS based simulation results demonstrate that the proposed automated control mechanism maintained the DC bus voltage regulated within × 4% and the battery SoC within 20% to 80%, utilizing the maximum possible available sources and ensuring seamless microgrid operation under varying wind velocity (7m/s-11m/s), solar irradiance (300w/m2-900w/m2), and load (3.1kW-16kW) conditions.