4-Hour BESS Is Now a Commodity Product

4-hour lithium iron phosphate (LFP) battery storage has commoditized faster than almost anyone predicted. System costs fell below $250/kWh in 2024 in competitive U.S. and European markets — a 60% decline in three years driven almost entirely by Chinese cell manufacturing scale. This is good for energy transition speed and terrible for hardware margin. The investable layer has shifted entirely to software, integration, and services — capacity optimization algorithms, degradation management, ancillary services stacking. Companies like Fluence (software + integration) and Powin (long-term O&M) are better positioned than inverter or cell suppliers for margin durability. Pure-play BESS hardware is a structurally low-margin business.