Stromfee Asia: Pan-Asian Battery Optimisation

Stromfee Asia ("Asia, optimised") frames the platform for the fastest-growing solar region on earth. The problem is familiar — noon over-generation, evening scarcity, frequency and voltage stress — and so is the fix: read the swings and dispatch a battery against them. The site runs in English with 中文 and 日本語 toggles.

The problem: solar floods noon, scarcity by evening

High solar penetration creates the same shape everywhere: midday over-generation and curtailment, steep evening peaks on ageing thermal plants, and falling system inertia with frequency and voltage stress. On the reference European day-ahead curve of 14 June 2026 the price ran from −25 €/MWh at 13:00 to +112 €/MWh at 20:00 — a 137 €/MWh spread. That swing is the whole opportunity: charge when power is free, discharge when it is scarce.

The solution: the BESS Optimizer

The core is a vendor-agnostic battery-dispatch engine that sits on top of the certified PCS/EMS safety controller — it never replaces it. It charges low, discharges high, and can deliver energy shifting, fast frequency response, peak-shaving, curtailment reduction, voltage support and black start. Dispatch is degradation-aware, so revenue is traded off against the 20-year warranty rather than against it. It speaks 173 manufacturer protocols (Modbus / SunSpec / API).

One intelligence layer, many tools

Behind the regional front page sits a single stack of tools — the same one that runs on the German reference fleet:

Why it is a "glass battery"

Every set-point, every cell voltage and every revenue figure is visible — no black-box dispatch. You see the two numbers that matter side by side: what the battery actually earned, and what the market allowed. For grid operators and battery makers scaling across very different Asian markets, one transparent, register-true method that works the same way everywhere is the point.

Proven where it is hardest

The method was built on the German grid — arguably the world's toughest proving ground for AI battery dispatch, with extreme solar and wind penetration, negative prices, redispatch and frequency stress. Twenty-plus years of operating real generation and storage assets against live markets stand behind it. For Asia, the same engine, now pointed at your grid.

The Asia picture

Japan shows where high-solar Asia is heading. Curtailment hit a record 1.74 TWh in the first half of 2025; in Kyushu — where solar penetration is roughly double the national average — the curtailment rate reached 6.1 % (about 1.04 billion kWh in FY2024), and daytime JEPX prices routinely fall to ¥0.01/kWh. By 2026 curtailment had even reached Tokyo. The average battery-arbitrage spread widened from about ¥4 to nearly ¥20 per day across 2024. Co-locating and dispatching storage against that swing is now the core revenue play — pan-Asia.

The Stromfee regional network

Explore the program at stromfee.asia, or watch a real battery live at BESS Inside.