Homer Pro 3.15 May 2026

| Feature | Why It’s Interesting | |---------|------------------------| | Enhanced battery degradation model | Calendar + cycle aging separately → more realistic lifetime replacements | | Sensitivity variables in time series | Now run sensitivities on fuel price, load growth, and solar resource simultaneously | | AC/DC coupled architecture presets | One-click topologies for common system layouts | | Export to Python/Excel | Raw time-step results for custom analysis | | Multi-year load growth | Linear, exponential, or step-change — not just annual scaling |

| 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%) | homer pro 3.15

Under Grid, define the purchase and sale price of electricity (e.g., Time-of-Use rates). In 3.15, you can also define grid outage schedules and the SAIDI/SAIFI targets. | Problem | Solution | |---------|----------| | “Unmet