Path-Q Solar
What bill information reveals whether my highest usage occurs during solar-producing hours?
Answer
The most useful information is interval or time-of-use consumption data showing electricity use by hour, ideally alongside solar production estimates for the proposed array. A monthly bill usually shows total consumption and charges but cannot reliably show when the highest usage occurred.
Key points
- Look for hourly or sub-hourly usage data from the utility portal, meter, or approved monitoring device.
- Compare the timing of household loads with the array's expected production curve by season.
- Time-of-use rate periods can make some hours financially more important than others.
What it depends on
- Availability and resolution of interval data
- Array orientation, shading, and seasonal production
- Household load timing and controllable equipment
- Rate periods, export treatment, and demand charges
Risks and trade-offs
- A high daily total does not necessarily mean high daytime usage.
- Averages can hide short peaks that affect demand charges or battery requirements.
- Production timing changes with season, weather, orientation, and shading.
Information you may need
- Recent bills and downloadable interval usage
- Rate schedule and billing-period definitions
- Proposed array orientation, size, and production profile
- Schedules for major loads such as heating, cooling, pumps, and charging
Your next step
What to do next
Download interval data and compare it with a seasonal production profile before choosing array size, storage, or load-control equipment.
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