Wind & Renewables Work SWMS

Wind and renewables construction covers utility-scale wind turbine erection, blade composite repair, ground-mounted and rooftop solar PV arrays, Battery Energy Storage System (BESS) commissioning, and EV fast-charger installation. The work uniquely combines working at extreme heights (turbine nacelles 80–160m), DC arc-flash exposure on string inverters and battery racks operating above 1500V DC, heavy lift crane operations for blade and tower section installation, and Global Wind Organisation (GWO) certified rescue from confined tower interiors. Under WHS Regulation 2025 Part 6.3 (Construction Work) and s291 (High Risk Construction Work), a written SWMS is mandatory before any work commences because the scope simultaneously triggers multiple section 291 HRCW categories — falls over 2m, energised electrical work, and powered mobile plant in proximity to workers. AS/NZS 5139:2019 (battery systems), AS/NZS 3000:2018 (wiring rules), and GWO Basic Safety Training standards impose specific competency, isolation, and rescue planning duties that must be documented in the SWMS and consulted on with workers before sign-on.

Hazards identified

7 hazards covered, sorted by priority.

Control measures

Hierarchy-of-controls order: elimination → substitution → isolation → engineering → administrative → PPE.

1. 1Elimination — Design out tower-top work by specifying ground-level pitch system maintenance access and pre-assembled nacelle modules delivered with internal componentry pre-installed at OEM factory.
2. 2Elimination — Use offline drone thermography and robotic blade crawlers to eliminate rope-access inspection of leading-edge erosion and lightning receptor continuity testing.
3. 3Substitution — Substitute 1500V DC string inverters with 1000V DC central inverters where arc-flash incident energy modelling per IEEE 1584 exceeds Category 2 PPE thresholds on the specific array layout.
4. 4Substitution — Replace flooded lead-acid BESS chemistry with LFP (lithium iron phosphate) cells offering higher thermal runaway onset temperature and lower toxic off-gas profile per AS/NZS 5139.
5. 5Engineering — Install GWO-compliant fall arrest rail systems on all tower internal ladders with twin-lanyard transition points, plus permanently rigged rescue descent devices at every service lift landing.
6. 6Engineering — Implement lockable DC isolators at PV array, combiner box and inverter input with visible break verification per AS/NZS 3000 cl 2.3, supported by voltage-rated insulating mats and arc-flash barriers.
7. 7Administrative — Enforce wind speed cut-off limits: 12 m/s for external nacelle work, 10 m/s for blade access, 7 m/s for crane lifts, verified by anemometer on nacelle and dogger handheld unit before each task.
8. 8Administrative — Mandate GWO Basic Safety Training (Working at Heights, First Aid, Manual Handling, Fire Awareness) currency within 24 months plus site-specific tower rescue drill within 7 days of first climb.
9. 9PPE — Issue full body harness rated to AS/NZS 1891.1 with integrated suspension trauma straps, GWO-compliant climbing helmet with chin strap, and arc-rated coveralls minimum 8 cal/cm² for electrical work.
10. 10PPE — Provide cat. 2 arc-flash kit (40 cal/cm² hood, gloves, leggings) for BESS commissioning, plus SCBA escape sets staged at every BESS container entry per emergency response plan.

Applicable Codes of Practice

High-Risk Construction Work triggered

Worked example

On a 180MW wind farm construction site in a coastal grazing region, a turbine erection crew arrives at the pre-start brief for nacelle internal fit-out on Turbine 14. The site supervisor opens the Wind & Renewables SWMS on a tablet and walks the crew through the hazard register, pausing on fall from nacelle, suspended trauma and crane load swing because today involves both internal ladder ascent to 110m and a pitch motor lift by the LR1600 crawler crane. The crew confirms GWO Working at Heights currency, anemometer reading (8.2 m/s — within the 12 m/s nacelle work limit but flagged for re-check at 1100), and that twin-lanyard transition is rigged on the fall arrest rail. The electrical lead identifies that pitch motor commissioning requires DC isolation per AS/NZS 3000 cl 2.3 — the SWMS isolation sequence is read aloud and the test-for-dead step initialled. Each worker signs on against the version-controlled SWMS. At 1340, wind gusts reach 13 m/s; the supervisor pauses external nacelle hatch work per the administrative control, notes the variation in the SWMS daily log, and re-deploys the crew to internal cable pulling until the gust front passes. The document functions as a live decision tool, not a filing-cabinet artefact.

Related legislation

• WHS Act 2011 (model)
• WHS Regulation 2025
• AS/NZS 3000 — Electrical installations

Frequently asked questions