What Electricity Data Is Needed to Assess a Solar Carport?

A total bill does not answer every question

Assessing a carport's possible bill effects starts with the current charge structure. Energy, time periods, demand and fixed items may use different rules, as defined by the local contract and provider. A monthly total alone cannot show which charges relate to solar production. Interval data reveals daily and weekly demand patterns, but is not itself a savings conclusion. Keep bills, rate definitions, meter identities and time-series records as separate inputs for professional analysis rather than working backward from an assumed average price.

Check data quality before modeling

Document source, dates, interval, units and missing records. Billing cycles may differ from calendar months, and accounts may cover different buildings or loads. Preserve original records and explain inconsistencies rather than filling gaps simply to simplify calculation. DOE energy-management guidance distinguishes bill management from interval analysis and describes how finer data reveals daily and weekly patterns. Use that distinction to organize collection, without assuming a complex new platform is needed for an initial comparison. Reliable exports already available are often a practical starting point.

• Collect actual bills and current charge definitions.
• Identify buildings, accounts and equipment covered.
• Separate gaps, unusual events and proposed future loads.

Compare two months with equal bills

Imagine two months with similar total bills, one dominated by daytime equipment and the other by added nighttime events. The totals appear alike, but interval records may show different alignment with daytime PV. Analysts should explain the pattern using the applicable charges instead of treating equal bills as equal loads. Mark failures and temporary events so short-term anomalies do not become long-term assumptions. This example explains why granularity matters; it predicts no savings percentage and recommends no investment size.

Share only the account information needed for analysis, while retaining sufficient identification to verify meter boundaries.

Separate facts, assumptions and unresolved items

A reviewable assessment states the billing basis, PV forecast inputs, cost-conversion method and conditions awaiting provider confirmation. Do not replace every charge with generation multiplied by one price, or describe modeled incentives and export income as secured entitlements. Relevant advisers should assess commercial decisions against local contracts. TTH structural pricing can be coordinated with energy-work scope, but structure cost alone cannot complete electricity analysis. Preserve data versions and assumptions so later information can explain changes in the result.