Load Analysis chart

What this widget is for

The Load Analysis chart answers one question: where did the energy that ran the site come from? It splits the total load over a chosen period — a day, a month, a year — into slices on a donut chart, showing how much came from solar, how much from the battery, how much from the generator, and how much had to come from the grid.

It is the right widget for self-consumption questions and for telling the renewable-vs-grid story to non-technical viewers. For which device consumed what use the Device Historical Analytics chart; for power right now use the Power Flow widget.

Companion guides

• Dashboard overview — how to add, move, resize, and remove widgets.
• Grid Flow and Battery Flow charts — the matching donut charts that focus specifically on grid (import vs export) and on battery (charge vs discharge).
• Energy Production & Consumption chart — the per-interval bar chart of the same underlying totals.

Where to find it

Open the Dashboard, click the pencil icon to enter edit mode, then click Add New Widget. Search the picker for Load Analysis and click Add Widget. The chart drops onto your dashboard at 3 × 3.

The chart at a glance

A donut with one slice per source that contributed to the load:

• PV — solar that went directly to the load.
• Storage Balance — net energy released by the battery for the period.
• Generator — generator output that went to the load.
• Grid Import — energy pulled from the grid to make up the rest.

Each slice is labelled with its share of the load (in Wh / kWh / MWh as appropriate). The subtitle below the chart reads, for example, Daily Load: 24.6 kWh — the total the donut splits up.

Period buttons let you flip between Daily, Monthly, and Yearly, and a date picker chooses the specific day, month, or year. The chart redraws automatically when you change either.

How the slices are computed

The chart uses a priority order when accounting for the load — it doesn't just dump all sources into a single total. The order is:

1. PV first. Whatever the load could draw from solar in the period gets attributed to PV.
2. Battery next. Net discharge during the period (discharge minus any charge) fills whatever the load still needed.
3. Generator next. Generator output covers anything still uncovered.
4. Grid Import last. Whatever was left over had to come from the grid.

This means the slices add up to the total load (not to the total energy produced by all sources), and you can read each slice as "of the energy the site used, this fraction came from this source".

Choosing what to show

Open the gear icon. Toggle each contributor on or off:

• PV — show PV's contribution to the load.
• Grid Import — show energy drawn from the grid.
• Grid Export — show energy sent out to the grid (typically off — this isn't part of the load).
• Load — show the total load as a single slice (typically off).
• Generator — show the generator's contribution.
• Storage Balance — show net battery discharge (typically on for the priority view above).

The defaults (PV, Grid Import, Generator, Storage Balance) give the canonical "what powered the site" view.

Reading the donut

• Each slice shows a label outside the ring with the source name and the energy total (Wh / kWh / MWh).
• Hover a slice for a slightly larger label with the same numbers.
• The central icon indicates this is a Load Analysis chart even when the title scrolls off.

Picking a period

The three period buttons:

• Daily — the breakdown for one chosen day.
• Monthly — the breakdown for one chosen month (all days of that month combined).
• Yearly — the breakdown for one chosen year.

Use Daily when comparing today vs yesterday; Monthly when tracking month-over-month self-sufficiency; Yearly for annual summaries and reporting.

Who can do what

• Any signed-in user can add the chart, switch periods, change dates, toggle contributors, and read the donut. The chart is read-only — it never sends a command back to a device.

Common issues

• A small contributor is missing from the donut. Slices below a small floor (effectively zero) are dropped to keep the chart readable. If, say, the generator ran for only a few minutes in the period, its share may be too small to draw.
• PV slice looks smaller than expected on a sunny day. Remember: this chart shows PV that went to the load, not total PV produced. The surplus likely charged the battery or was exported. Cross-check with the Energy Production & Consumption chart's PV total.
• Grid Import is dominant on a battery-equipped site. Either the battery was empty during the period, the load was very high, or the system is configured to prefer grid for some reason. Look at the Power Analytics chart for the same period to see when the grid was drawn on.

Tips and gotchas

• Use it as a "self-sufficiency story" widget. Add a Load Analysis chart on the Monthly period and you have a one-glance answer to "how much of our load was renewable this month?".
• Pair it with the Grid Flow chart. Load Analysis says where the load came from; Grid Flow says how the grid was used (import vs export). Two narrow donuts side by side tell a complete energy-balance story.
• Yearly view for boardroom reports. Set the period to Yearly, pick last year, and the chart's slices are your headline numbers for renewable contribution.