The Stromfee.US app hub

Every tool behind battery optimization in US power markets — the BESS optimizer, live ISO/RTO prices, weather, grid reliability and energy news. All in one place.

CAISO

CAISO NP15 — Northern California

Live

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Source: CAISO OASIS (public API) · day-ahead wholesale

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BESS Optimizer

Schedule your battery against live US wholesale prices. Buy low, sell high, capture arbitrage across the day.

Open the optimizer → US Power Markets

Live CAISO prices plus reference data across PJM, ISO-NE, MISO, ERCOT and the Western ISOs — in $/MWh.

View live prices →

All apps

Charge Director Smart charge/discharge windows for your battery, hour by hour. US Power Markets Live ISO/RTO wholesale prices in $/MWh, freshness labeled. US Weather Temperatures (°F) and conditions driving demand and solar output. Grid Blackouts Outage and reliability events across the US grid. Grid Quality Frequency and power-quality signals from the grid. US Energy News Headlines on US power markets, storage and the grid.

Video & studio

US video content In production

Localized US-unit explainer videos (prices in $/MWh, temperatures in °F, English audio) are still being produced and are not available yet. We deliberately do not re-label our existing German-language studio videos as US content — those use metric units (€/MWh, °C) and German audio, so they would be misleading here. This section will go live once the English, US-unit versions are ready.

Data honesty. The live ticker above pulls CAISO NP15 (Northern California) from the public CAISO OASIS API and shows the latest day-ahead market interval with its real timestamp. CAISO is live today; other ISOs on the markets page are historical reference until their feeds are connected. Negative prices are real, not errors — they mark oversupply windows when a battery should be charging.