How do energy savings and operational changes impact ROI calculations

Incorporating operational changes into ROI models

Operational changes such as energy efficiency upgrades, load shifting, or process modifications can significantly affect solar ROI. Reducing baseline consumption generally lowers required system size but can improve the percentage of load offset by solar. Conversely, increases in energy use can improve ROI if new loads coincide with solar generation.

Operational levers to consider:

• Efficiency upgrades (lighting, HVAC, motors) reduce total kWh and may lower system scope
• Shifting energy-intensive processes to daytime increases solar self-consumption
• Combining solar with storage enables load shifting to maximize use of generated solar

Modeling practical impacts

• Include projected changes in consumption when sizing the system
• Model scenarios (baseline, efficiency-first, high self-consumption) to compare outcomes
• Account for cost and payback of operational measures versus additional solar capacity

Integrating operational improvements with solar planning often yields better financial and environmental outcomes than solar alone. Conducting an energy audit and load analysis provides data to optimize combined investments.