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Peak Demand

The Peak Demand page shows how power demand varies over time, grouped by incomer type (EB, Solar, Wind, DG). Because multiple meters of the same type feed the facility in parallel, their peak demands are summed within each type to give a single value per time bucket — giving an accurate picture of total demand from each source.

Selecting a period

Pill Period covered
Last 30 days The most recent 30 days
Last 3 months From the start of the month three months ago to today (default on page load)
Custom Any date range you specify

Selecting Custom reveals date pickers and an Apply button.

Granularity

The Daily / Weekly / Monthly toggle controls how the trend chart groups data:

Option Chart shows
Daily Summed peak demand per incomer type each day, as a line chart
Weekly Summed peak demand per incomer type each week, as a grouped bar chart
Monthly Summed peak demand per incomer type each month, as a grouped bar chart

Monthly is the default and aligns with utility billing cycles.

Trend chart

A line chart (Daily) or grouped bar chart (Weekly / Monthly) with one series per incomer type:

Colour Type
Blue EB (grid supply)
Amber Solar
Green Wind
Red DG

Hover over any bar or data point for the exact figure. The unit on the Y-axis (kW or kVA) follows the setting configured in EMS Settings.

How peak demand is determined

The platform uses the following priority order to find demand values for each incomer:

  1. peak_demand tag — If your energy meter has a dedicated peak demand parameter with the peak_demand tag type, that value is used directly.

  2. maximum_demand register — If no peak_demand tag exists, the platform falls back to a dedicated maximum demand register (if configured).

  3. Apparent power peak (kVA) — If neither dedicated source is available, the highest apparent power (kVA) recorded is used instead.

A coloured badge in the chart header tells you which source is currently active:

Badge colour Meaning
Blue — "Using peak_demand" Direct peak demand data is available
Green — "Using maximum_demand register" Dedicated MD register is being used
Amber — "Fallback: apparent power (kVA)" Neither dedicated source is available

Peak demand summary table

Below the trend chart, a table shows the aggregate peak demand per source type for the full selected period:

Column Description
Source Type EB, SOLAR, WIND, or DG
Data Source The tag type used to calculate demand
Peak Demand Sum of peak demands across all incomers of this type, in the configured unit (kW or kVA)

The table is sorted from highest to lowest demand.

Peak Demand by Section

Below the summary table, a collapsible panel — Peak Demand by Section — lets you see which parts of your plant are responsible for the most demand during the selected period.

Click the panel header to expand it. Two charts appear side by side:

  • Pie chart — each section's share of the total peak demand as a percentage. Hover over a slice to see the exact value.
  • Horizontal bar chart — the absolute peak demand value per section, sorted from highest to lowest.

This view is useful for targeting demand-reduction measures — for example, staggered equipment start-ups or load shedding in the highest-demand section.

Note

The section drill-down uses the same period and data source as the main trend chart above it.