Path-Q Solar
How should seasonal business hours affect a small business solar design?
Answer
Use seasonal operating hours and seasonal electricity consumption rather than annual totals alone. Solar sizing should reflect when the business is open, which loads operate during daylight, and how demand changes across the year.
Key points
- Daytime business loads can increase direct solar use.
- Seasonal closures or shorter hours can reduce consumption during periods when solar production is high or low.
- Cooling, heating, refrigeration, production equipment, and lighting may drive different seasonal patterns.
- Interval data is especially useful for matching solar output with operating demand.
What it depends on
- Monthly operating schedule and occupancy
- Seasonal equipment and HVAC loads
- Load timing during business hours
- Export, demand-charge, and billing treatment
Risks and trade-offs
- Annual energy offset may not reflect the value of reducing daytime demand.
- A larger system may produce surplus during closure periods.
- Reducing energy use through efficiency may be more valuable than adding capacity for low-use seasons.
Information you may need
- At least a year of bills and interval data if available
- Seasonal opening hours and closure periods
- Major equipment schedules and ratings
- Demand-charge and export details
Your next step
What to do next
Provide the designer with a month-by-month operating calendar and load data, and request a seasonal production, self-consumption, and demand analysis.
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