> ## Documentation Index
> Fetch the complete documentation index at: https://docs.nectarclimate.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Methodology FAQ

> Common questions about calendarization, cost attribution, and complex billing scenarios.

Use this page for troubleshooting and interpretation questions related to Nectar's methodology.

## Frequently asked questions

<AccordionGroup>
  <Accordion title="Why do my calendar-month totals differ from a single bill total?">
    Bills often span multiple months. Nectar prorates usage and costs across overlapping calendar
    months, so monthly totals are expected to differ from any one bill document.
  </Accordion>

  <Accordion title="Does Nectar modify my original bill values?">
    No. Original bill values are preserved. Methodology calculations are applied for reporting and
    analytics views without overwriting source values.
  </Accordion>

  <Accordion title="Why do charges look split across multiple meters?">
    When a bill covers multiple meters, Nectar allocates costs by usage share when possible. Fixed
    account-level fees may be split evenly.
  </Accordion>

  <Accordion title="Can usage appear negative?">
    Yes, in specific scenarios such as excluded meters, net metering exports, or correction
    adjustments. Check meter configuration and meter type before assuming data is wrong.
  </Accordion>

  <Accordion title="How are revised or corrected bills handled?">
    Revised documents supersede earlier values in reporting contexts while maintaining an auditable
    document trail. Review bill detail and audit links for reconciliation.
  </Accordion>

  <Accordion title="Why does one month include multiple bills for the same meter?">
    This can occur when bills are split, corrected, or cover adjacent partial periods. Nectar
    aggregates all overlapping contributions for the selected month.
  </Accordion>

  <Accordion title="How should I explain methodology differences to stakeholders?">
    Use the methodology pages to show that Nectar aligns non-calendar billing periods into standard
    calendar periods and meter-level allocations for consistent reporting.
  </Accordion>

  <Accordion title="How does occupancy adjustment affect my data?">
    When a site has an occupancy percentage and the application mode is enabled, Nectar multiplies raw
    usage by that percentage to produce your tenant usage. This adjusted value flows through to
    analytics, exports, and cost attribution. See
    [Occupancy adjustment](/platform/methodology/occupancy) for full details on the three application
    modes.
  </Accordion>

  <Accordion title="Where can developers see API-facing data model details?">
    Use [Data model overview](/developer-guide/data-model/overview) in the Developer Guide for API objects
    and integration-specific behavior.
  </Accordion>
</AccordionGroup>

## Related methodology docs

<CardGroup cols={2}>
  <Card title="Methodology overview" icon="book-open" href="/platform/methodology/overview">
    End-to-end explanation of how data moves from bills to reporting.
  </Card>

  <Card title="Key concepts" icon="lightbulb" href="/platform/methodology/key-concepts">
    Sites, meters, accounts, bills, and how they relate.
  </Card>

  <Card title="Monthly data calculation" icon="calendar" href="/platform/methodology/calendarization">
    Calendarization details and examples.
  </Card>

  <Card title="Cost allocation" icon="money-bill" href="/platform/methodology/cost-attribution">
    How charges are distributed across meters and sites.
  </Card>

  <Card title="Occupancy adjustment" icon="building" href="/platform/methodology/occupancy">
    How partial-building occupancy modifies usage values.
  </Card>
</CardGroup>