Use the new weather data integration tools. Go to Resources → Solar → Global Solar Atlas to pull GHI, DNI, and DIF data for your latitude/longitude. For wind, use ERA5 reanalysis data.
With the global push for green hydrogen, HOMER Pro 3.15 includes better modeling of: homer pro 3.15
UL Solutions offers several licensing tiers for HOMER Pro: Use the new weather data integration tools
Upgrading from 3.14 to 3.15: Existing annual subscribers receive the update automatically. The update is not backward-compatible in all cases; simulation files saved in 3.15 cannot be opened in 3.14. However, 3.15 can open older files. UL Solutions offers several licensing tiers for HOMER Pro:
System Requirements: Windows 10/11 (64-bit), 8 GB RAM minimum (16 GB recommended for large simulations), 1 GB disk space. No native macOS version, but runs well under Parallels or Wine.
| Problem | Solution | |---------|----------| | “Unmet load” error in optimal case | Increase min renewable fraction or add storage | | Battery cycles too high | Lower max charge current or change dispatch to load following | | Converter oversized | Check peak simultaneous charge+discharge — rarely happens | | Diesel runs even with full battery | Adjust “setpoint state of charge” (default 80% → 95%) |