HOMER

What HOMER Actually Optimizes

HOMER doesn’t just simulate one system configuration — it searches across combinations. Given a load profile and a set of candidate components (PV array sizes, battery banks, wind turbines, fuel cells, diesel or gas generators), HOMER runs the technical simulation and economic analysis for each feasible combination and ranks them by net present cost over the project lifetime. This is what separates it from a single-scenario tool: instead of telling you whether one design works, it tells you which combination of technologies, sized correctly, minimizes lifecycle cost while still meeting the load reliably.

That combinatorial search is why HOMER is the default choice for off-grid and islanded power system feasibility studies — remote communities, mining sites, telecom towers, military installations, and island grids — where diesel-only supply is the baseline being displaced and the question isn’t “will solar work?” but “what mix of solar, storage, wind, and generator capacity gets the lowest cost per kWh delivered?”

HOMER Explained Simply

For project developers: Before committing capital to a remote or islanded site, HOMER answers the sizing question — how much PV, how much battery, and how much diesel backup capacity actually makes economic sense for this specific load and resource profile.

For engineers new to hybrid systems: Unlike PVsyst or Helioscope, which assume a single grid-tied PV array and produce one yield number, HOMER’s core output is a ranked list of system configurations. You’re comparing designs against each other, not just validating one.

Analogy: If PVsyst answers “how much energy will this exact solar array produce,” HOMER answers “which combination of solar, storage, and backup generation should I even build” — it operates a step earlier in the decision process, at the system-architecture level rather than the single-design-validation level.

Related Reading

HOMER sits alongside PVsyst in most hybrid and off-grid feasibility workflows — PVsyst (or a comparable tool) usually validates the solar-only energy yield once HOMER has settled on a system architecture, and our guide on accurate energy yield predictions covers why getting that yield number right matters for financing. If you’re evaluating which platform fits a given project stage, Best Solar Design Software in 2026: 10 Platforms Ranked places HOMER in context against grid-tied design tools like Aurora and Helioscope. For off-grid or hybrid microgrid contracts that move from modeling into on-ground execution, our sister company Heaven Green Energy handles the EPC delivery side once the system architecture from a HOMER study is finalized.