China's energy storage market is currently facing a significant profitability crisis. This situation arises from a collision between two major forces: the sharp rebound in lithium carbonate prices, a key raw material, and the ultra-low bid prices that became the industry standard in 2025.
So, what exactly happened? The causal chain is quite clear. First, the foundation of the problem was laid in mid-2025. A massive 25 GWh procurement by China Energy Engineering Corporation (CEEC) set a historically low average bid price of 0.465 yuan/Wh. This ultra-low price became a 'benchmark' or 'anchor,' making it difficult for ESS companies to raise their prices later, even when their costs went up.
Second, starting in early 2026, lithium carbonate prices, which had hit rock bottom, began to climb rapidly. By May 2026, spot prices had surged by over 24% in just one month, approaching the critical 200,000 yuan per ton mark. This directly increased the production cost for battery cells, which account for over 70% of the cost of a DC-side ESS container.
Third, despite rising costs, the low-price bidding culture persisted. Even in May 2026, new large-scale cell procurement bids were still seeing prices as low as 0.34 yuan/Wh. This created a severe margin squeeze where companies were trapped between soaring material costs and stubbornly low selling prices.
Our calculations confirm this dilemma. For an ESS project bid at 0.50 yuan/Wh, the breakeven point for lithium carbonate is around 197,000 yuan per ton. This means that as prices cross the 200,000 yuan threshold, these projects immediately start losing money. This quantitative analysis aligns perfectly with industry sentiment that the 200,000 to 250,000 yuan range is a critical tipping point for project viability.
- ESS (Energy Storage System): A system that captures energy and stores it for later use. In this context, it refers to large-scale battery systems connected to the power grid.
- DC Side: Refers to the part of the ESS that includes the battery modules and their housing (the container), before the power is converted from Direct Current (DC) to Alternating Current (AC).
- LFP (Lithium Iron Phosphate): A type of lithium-ion battery chemistry known for its safety, long lifespan, and lower cost, making it popular for ESS applications.