Solar SWMS — Safe Work Method Statement for Solar Panel Installation
Solar photovoltaic installation is one of the highest-risk combinations of trades on a construction site because it simultaneously triggers multiple high-risk construction work (HRCW) categories under WHS Regulation 2025 Schedule 1. Every installation involves work above 2 metres (falls category), work on or near energised electrical installations (electrical category), and frequently work involving powered mobile plant (where an EWP or truck-mounted platform is used for commercial installations). A Safe Work Method Statement is therefore legally required before any solar installation work commences, regardless of whether the system is a 6.6 kW residential array or a 100 kW commercial array. Solar work carries a combination of hazards that does not exist on any other trade. Solar modules generate DC voltage whenever they are exposed to light — the array cannot be fully de-energised during daylight hours. A residential string at standard test conditions produces up to 600 VDC; commercial and utility-scale strings routinely exceed 1000 VDC. Unlike AC circuits, DC arcs do not self-extinguish because the voltage does not cross zero, so an arc started by cutting a live cable or disconnecting a live MC4 plug will continue to burn until the energy source is removed — burning through insulation, igniting surrounding materials, and causing fires that have been the subject of multiple Clean Energy Regulator investigations. Rooftop solar installation combines DC electrical hazards with the standard hazards of working on pitched and flat roofs: falls from edges, falls through fragile surfaces (particularly on older commercial roofs with skylights or deteriorated fibre cement cladding), heat stress from working on metal roofs that exceed 65 degrees Celsius in summer, manual handling of heavy 20-25 kg panels on sloped surfaces, and cable routing through ceiling voids that may contain asbestos, existing energised wiring, or fragile ceiling membranes. This template provides a pre-filled solar installation SWMS framework developed in accordance with the WHS Regulation 2025, the Code of Practice: Managing the Risk of Falls at Workplaces (2021), the Code of Practice: Managing Electrical Risks in the Workplace (2022), AS/NZS 5033:2021 (Installation and safety requirements for photovoltaic arrays), AS/NZS 3000:2018 (Wiring Rules), AS/NZS 4777.1 (Grid connection of energy systems via inverters), and the Clean Energy Council Install Quality Standards. It covers residential and commercial rooftop installations and must be reviewed, customised for the specific site and project, and developed in consultation with workers before use.
SWMS variants reference your state's WHS legislation. Instant download after payment.
Legal Requirements
WHS Regulation 2025 Part 6.1 Division 3 — High Risk Construction Work; WHS Regulation 2025 Part 4.7 — Electrical Safety
Work involving a risk of a person falling more than 2 metres; work on or near energised electrical installations or services; work involving powered mobile plant (where an EWP is used). Multiple HRCW categories apply simultaneously (WHS Regulation 2025 Schedule 1).
Code of Practice: Managing the Risk of Falls at Workplaces (2021); Code of Practice: Managing Electrical Risks in the Workplace (2022); Code of Practice: Construction Work (2018); Clean Energy Council Install Quality Standards
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Hazards
| Hazard | Consequence | Likelihood |
|---|---|---|
| Falls from roof edge during panel positioning, mounting, and cable routing | Falls from height are the leading cause of death and serious injury in Australian construction. Solar installers work routinely at heights above 2 metres on residential pitched roofs and on commercial flat roofs where the parapet does not meet edge protection requirements. Outcomes include spinal cord injury, traumatic brain injury, multiple fractures, and fatality. Clean Energy Regulator data has identified rooftop solar installation as an over-represented category for fall-related fatalities and serious injuries in recent years. | Possible (C) — routine exposure on every installation; elevated where edge protection has not been installed or where installers attempt to work from ladders rather than scaffold or EWP |
| DC electric shock from solar string voltage during wiring, connection, and fault-finding | Solar strings produce DC voltage whenever exposed to light. A residential string typically produces 300 to 600 VDC at open-circuit voltage; commercial strings routinely exceed 1000 VDC. Contact with live DC conductors causes electric shock, cardiac arrhythmia, cardiac arrest, and severe thermal burns. Unlike AC, DC at these voltages cannot be safely tested with a standard voltmeter clip lead and cannot be interrupted by simply turning a switch — it requires a DC-rated load-break isolator. | Possible (C) — risk elevated during initial connection, string reconfiguration, fault-finding, and any work where MC4 connectors are disconnected under load |
| DC arc flash during cable cutting, plug disconnection, or insulation failure | DC arcs do not self-extinguish because the voltage does not cross zero. An arc started by cutting a live DC cable or disconnecting an MC4 plug under load will sustain, burning through insulation, igniting surrounding materials, and causing severe thermal burns. Arc temperatures exceed several thousand degrees Celsius at the arc point. DC arc flash has been identified as a leading cause of rooftop solar fires and has been the subject of multiple Clean Energy Regulator investigations, particularly where MC4 connectors have been poorly crimped or where installers have cut live cables. | Unlikely (D) — but consequence is catastrophic; highest risk during cable cutting, plug disconnection, and re-termination work |
| Falls through fragile roof surfaces including skylights, deteriorated fibre cement cladding, and aged metal sheeting | Falling through a fragile roof panel results in an internal fall to the level below, often striking structural members on the way. Commercial buildings with pre-1990 fibre cement roofing are a particular hazard because the sheeting becomes progressively more brittle with UV exposure and will fracture under a worker's weight with no warning. Skylights are frequently mistaken for load-bearing panels because they sit flush with the roof plane. Outcomes include spinal fracture, traumatic brain injury, and fatality. | Possible (C) on older commercial roofs; Unlikely (D) on modern residential roofs with trussed roof framing |
| Heat stress from working on hot roof surfaces during summer | Metal roof surfaces routinely exceed 65 degrees Celsius in Australian summer conditions and can approach 75 degrees Celsius in direct sun. Heat transferred from the surface to the worker causes heat exhaustion, heat stroke, impaired judgement, and collapse. Heat stroke is a medical emergency with a core temperature above 40 degrees Celsius and can cause permanent neurological damage or death. Workers wearing full PPE and harnesses are at elevated risk because the equipment reduces evaporative cooling. | Likely (B) during summer months on unshaded roofs |
| Manual handling of solar panels on pitched and sloped surfaces | Standard solar panels weigh 20 to 25 kilograms each and are awkward to carry on pitched roofs. Residential installations typically involve 15 to 30 panels per job; commercial installations involve hundreds. Manual handling injuries include lower back strain, shoulder injury, and wrist strain from lifting and positioning panels. Cumulative exposure causes chronic musculoskeletal disorders. The risk is elevated when wind gusts turn the panel into a sail during handling. | Likely (B) — unavoidable manual handling on every installation |
| Cable routing through ceiling voids and wall cavities | DC and AC cables must be routed from the rooftop array down to the inverter and switchboard, which almost always involves work in the ceiling space. Ceiling voids present multiple hazards: falls through plasterboard between trusses, heat stress in unventilated spaces (temperatures routinely exceed 50 degrees Celsius), contact with existing energised wiring, disturbance of asbestos insulation, exposure to fibreglass insulation dust, and deteriorated structural members that are not visible from the living space below. | Possible (C) — routine ceiling-void access required on most residential installations |
| Structural overloading of roof from panel array weight | A typical residential solar array with mounting rails adds 15 to 25 kilograms per square metre to the roof dead load. On older roofs, or roofs with deteriorated framing, the added load can exceed the structural capacity of trusses, battens, or rafters, leading to gradual deflection, cracking, or outright collapse. AS 1170.1 requires that the roof be assessed for the combined dead and live load including the array, installers, and wind uplift on the panels. | Unlikely (D) — but consequence is catastrophic; risk elevated on pre-1990 residential buildings and on commercial buildings with long-span roof structures |
| Contact with overhead power lines during panel transport and crane operations | Panels being lifted from truck to roof, or moved across a rooftop, can contact overhead power lines at the service entry or nearby street distribution network. Contact with 11 kV or 22 kV distribution lines is almost always fatal due to the extreme voltage and current. Even approaching within the safe approach distance without physical contact can cause arcing and electrocution. | Unlikely (D) — but consequence is catastrophic; risk elevated on urban sites where distribution lines pass close to the building |
| UV radiation exposure during extended rooftop work | Extended rooftop work in Australian conditions causes severe sunburn, cumulative skin damage, and long-term skin cancer risk. The Australian UV index routinely exceeds 11 (extreme) in summer months and can cause sunburn in less than 15 minutes on unprotected skin. Solar installers are over-represented in skin cancer incidence among construction trades because of the combination of high exposure time and elevated reflectance from metal roof surfaces. | Almost Certain (A) on unprotected workers during daylight work |
Controls (Hierarchy of Controls)
Recent Prosecutions
The Clean Energy Regulator has investigated and enforced against multiple solar PV installation businesses over the period 2020 to 2024 following reports of non-compliant installations, DC electrical incidents, and rooftop fires. Enforcement outcomes have included accreditation suspension, cancellation, and in some cases referral to state electrical safety regulators. Common findings included inadequate DC isolation procedures, poor MC4 connector crimping, and missing or inadequate site-specific SWMS.
2024 — Clean Energy Regulator enforcement and compliance reports
SafeWork NSW has conducted targeted enforcement on solar PV installation sites, issuing improvement and prohibition notices for work at heights without edge protection, work on live DC systems without DC-rated isolation, and missing site-specific SWMS. Inspectors have cited the Code of Practice: Managing the Risk of Falls at Workplaces and the Code of Practice: Managing Electrical Risks in the Workplace.
2024 — SafeWork NSW Construction and Electrical Compliance Programme
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