{
  "slug": "battery-install-compliance-2026",
  "title": "Three in Five: What the Battery Inspection Rate Counts",
  "url": "https://solaranalytica.com/battery-install-compliance-2026",
  "summary": "The Clean Energy Regulator rated 62.28 per cent of inspected battery systems substandard against 18.6 per cent for rooftop solar, but the unsafe rate did not move with it. What a system-level rating counts, where the flagged items sit, and a state spread running from 41.6 to 77.2 per cent.",
  "license": "Free to use with attribution to Solar Analytica (solaranalytica.com). Underlying figures are named to their public sources below.",
  "csv": "https://solaranalytica.com/reports/battery-install-compliance-2026/data.csv",
  "datePublished": "2026-08-13",
  "lastReviewed": "2026-09-15",
  "sources": [
    {
      "title": "Clean Energy Regulator: solar battery inspection results report (ratings, definitions, period)",
      "url": "https://cer.gov.au/schemes/renewable-energy-target/small-scale-renewable-energy-scheme/small-scale-renewable-energy-systems/small-scale-renewable-energy-system-inspections/solar-battery-inspection-results-report"
    },
    {
      "title": "Clean Energy Regulator: battery inspection results, checklist items by rating (CSV)",
      "url": "https://cer.gov.au/document/battery-inspection-results-report-checklist-items-rating"
    },
    {
      "title": "Clean Energy Regulator: battery inspection results, system inspection findings per state (CSV)",
      "url": "https://cer.gov.au/document/battery-inspection-results-report-system-inspection-findings-state"
    },
    {
      "title": "Clean Energy Regulator: battery inspection results, checklist criteria results by category (CSV)",
      "url": "https://cer.gov.au/document/battery-inspection-results-report-checklist-criteria-results-category"
    },
    {
      "title": "Clean Energy Regulator: Inspections update No. 24, 2024-25 inspections program (solar comparison, sampling basis, checklist refinement)",
      "url": "https://cer.gov.au/document/inspections-update-no-24"
    },
    {
      "title": "Clean Energy Regulator: small-scale renewable energy system inspections (battery program start date)",
      "url": "https://cer.gov.au/schemes/renewable-energy-target/small-scale-renewable-energy-scheme/small-scale-renewable-energy-systems/small-scale-renewable-energy-system-inspections"
    }
  ],
  "figures": [
    {
      "id": "state-substandard-slope",
      "title": "Share of inspected battery systems rated substandard, by state, at the 8 June and 30 June 2026 readings",
      "unit": "per cent of inspections finalised to that date",
      "valueLabel": "To 8 June 2026",
      "valueBLabel": "To 30 June 2026",
      "provenance": {
        "dataSource": "Clean Energy Regulator, battery inspection results report, system inspection findings per state (CSV), read at the 13 August and 15 September 2026 states of the page",
        "dataType": "Observed, cumulative to each reading",
        "scope": "The six jurisdictions with more than 150 inspections at the later reading; the Northern Territory (34) and Tasmania (44) excluded",
        "statistic": "Substandard count divided by inspections, calculated from the published counts"
      },
      "caption": "Two cumulative readings per state, not a period rate: each point is the substandard share of every inspection finalised to that date. Every state moved by under two points except the ACT, and the spread across the six narrowed from 39.7 to 35.6 points. Rates calculated from the CER's published per-state counts at each reading.",
      "series": [
        {
          "label": "Queensland",
          "value": 77.3,
          "valueB": 77.2
        },
        {
          "label": "Western Australia",
          "value": 62.9,
          "valueB": 61.2
        },
        {
          "label": "South Australia",
          "value": 59.8,
          "valueB": 59.1
        },
        {
          "label": "New South Wales",
          "value": 59.1,
          "valueB": 58.9
        },
        {
          "label": "Victoria",
          "value": 57.5,
          "valueB": 58
        },
        {
          "label": "ACT",
          "value": 37.6,
          "valueB": 41.6
        }
      ]
    },
    {
      "id": "state-substandard-rate",
      "title": "Share of inspected battery systems rated substandard, by state, to 30 June 2026",
      "unit": "per cent of inspections",
      "valueLabel": "Substandard rate",
      "provenance": {
        "dataSource": "Clean Energy Regulator, battery inspection results report, system inspection findings per state (CSV), read 15 September 2026",
        "dataType": "Observed, cumulative to 30 June 2026",
        "scope": "The six jurisdictions with more than 150 inspections; the Northern Territory (34) and Tasmania (44) are in the adjacent table only",
        "statistic": "Substandard count divided by inspections, calculated from the published counts"
      },
      "caption": "One national scheme, a spread of thirty-five points. Rates calculated from the CER's published per-state counts (WA: 240 substandard of 392 inspected). The NT (34 inspections) and Tasmania (44) are omitted as too small to plot, though the NT now rates above Queensland.",
      "series": [
        {
          "label": "Queensland",
          "value": 77.2
        },
        {
          "label": "Western Australia",
          "value": 61.2
        },
        {
          "label": "South Australia",
          "value": 59.1
        },
        {
          "label": "New South Wales",
          "value": 58.9
        },
        {
          "label": "Victoria",
          "value": 58
        },
        {
          "label": "ACT",
          "value": 41.6
        }
      ]
    }
  ]
}