Path-Q Solar
Can solar be sized accurately when my electricity use is concentrated in one season?
Answer
Yes, but the design must use monthly or interval consumption and production rather than annual totals alone. Seasonal alignment matters: a system that offsets annual energy may still produce surplus in one season and require substantial grid electricity in another.
Key points
- Compare seasonal load with seasonal solar production.
- Heating or cooling loads can create large differences between annual and monthly needs.
- Roof orientation, shading, tilt, and system size affect the seasonal production profile.
- Storage can shift energy between times but generally cannot eliminate a large seasonal mismatch by itself.
What it depends on
- Monthly consumption profile
- Solar resource and array orientation
- Seasonal heating, cooling, or other major loads
- Storage capability and electricity billing terms
Risks and trade-offs
- Sizing to the highest-use season may create substantial lower-season surplus.
- Sizing to annual average may leave the property reliant on grid energy during the high-use season.
- Seasonal storage or additional equipment can materially increase complexity and cost.
Information you may need
- At least twelve months of monthly use, if available
- Monthly production estimate for candidate layouts
- Seasonal operating changes
- Battery plans and applicable export treatment
Your next step
What to do next
Request a month-by-month production and consumption comparison for at least two system sizes.
Path-Q
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