Homer Pro 3.15 [updated] < Confirmed • 2027 >

The most significant source of error in any HOMER model is rarely the solar irradiance data; it is the load profile.

This allows you to ask "What if?" questions about factors beyond your control, such as fluctuating fuel prices or varying wind speeds, to see how they impact your design's viability. System Requirements & Modules

It simulates a specific system configuration for every hour (or minute) of the year to see if it can meet the required load.

To illustrate the power of version 3.15, consider a hypothetical island community in Southeast Asia transitioning from 100% diesel to solar+battery+hydrogen.

The "Hydrogen" results tab now displays unmet hydrogen loads, which is vital for sizing fuel cell and storage systems.

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.