According to industry analysis from Market Research Future, the mild hybrid vehicles market is projected to grow from $218.3 billion in 2025 to $328.84 billion by 2035, at a CAGR of 4.18%. At the heart of this growth is the mild hybrid vehicles 48V system, a technology that has emerged as a cost-effective solution for reducing fuel consumption and emissions without the complexity of full hybrids. This dual-voltage architecture (48V and 12V) enables significant efficiency improvements while remaining below the 60V safety threshold, avoiding expensive high-voltage protection requirements.

The 48V system typically comprises a belt-integrated starter generator (B-ISG), a compact 48V lithium-ion battery, and a DC/DC converter to manage power flow between the 48V and 12V electrical systems. The B-ISG replaces the conventional starter and alternator, recovering energy during deceleration (recuperation) and providing torque assist during acceleration. This setup enables extended start-stop functionality, allowing the engine to switch off more frequently and for longer periods, even at speeds up to 30 km/h during coasting. Vehicles with more advanced topologies can achieve fuel savings of 15-25%, depending on the architecture's integration level.

The 48V system is also being used to power high-performance consumers like electric brake boosters and active suspension systems, reducing the load on the 12V network. By enabling these functions, the 48V system not only improves fuel economy but also enhances overall vehicle comfort and safety. The mild hybrid vehicles market continues to be driven by the adoption of 48V systems across various vehicle segments.

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