Mini toolsEPT-2.1 Helios
By Jua.ai
EPT-2.1 Helios is part of Jua's EPT-2 model family, built for solar radiation and solar power forecasting across Europe. Instead of inheriting initial conditions from a numerical weather prediction analysis cycle, Helios initializes directly from recent satellite imagery combined with atmospheric background fields, then predicts solar radiation for the next 48 hours, with a new cycle starting every 30 minutes. Benchmarked against roughly 500 European stations, it shows lower mean absolute error than ICON-EU and EC IFS at every lead time from 1 to 48 hours, and reduces day-ahead revenue regret for solar assets by roughly 33 to 39 percent versus those baselines. It is available through the Jua Earth Intelligence Platform via REST API and Python SDK, with a historical archive for backtesting, and is compatible with existing EPT-2 family workflows.
Overview
EPT-2.1 Helios is a European solar forecasting model that initializes directly from real-time satellite observations rather than an older NWP analysis cycle. It produces a 48 hour solar radiation forecast every 30 minutes at 30 minute resolution, serving both intraday and day-ahead solar power decisions.
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Industry:
Information Technology and Services
Company Size:
11-50
Location:
Zurich, CH
Website:
jua.ai
Last updated: July 22, 2026
