Path-Q Solar
Should I use interval usage data instead of total bills for solar planning?
Answer
Use interval data when it is available and reliable, especially if you want to evaluate self-consumption, time-based rates, batteries, EV charging, or load shifting. Total bills remain useful for annual consumption and for checking the interval-data total.
Key points
- Interval data shows when electricity is imported, which affects direct solar use and storage value.
- It can reveal large peaks, overnight loads, and seasonal operating patterns.
- Bills provide account, meter, and total-usage context that interval data may not show clearly.
- Use data covering representative seasons and verify that the interval period and units are correct.
What it depends on
- Availability and resolution of interval data
- Accuracy and completeness of the data
- Rate structure and export treatment
- Solar, battery, and load-shifting objectives
Risks and trade-offs
- Short or anomalous data periods can produce misleading designs.
- Interval data may not identify which appliance caused a load.
- Higher data detail does not replace a site assessment or production model.
Information you may need
- At least a representative year of interval data where possible
- Matching bills and account details
- Rate and export terms
- Planned solar, battery, and major loads
Your next step
What to do next
Download the longest reliable interval-data record available and have it reconciled with annual bills before requesting final modeling.
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