WAH — Solar Panel Installation SWMS
Rooftop solar PV panel installation including mounting, electrical connection, and inverter setup.
SWMS variants reference your state's WHS legislation. Instant download after payment.
This SWMS covers rooftop solar PV panel installation and grid-connected inverter commissioning on residential and commercial buildings — panel mounting-rail set-out, panel lay-up and secure, DC string wiring, DC isolator and inverter install, and final connection to the consumer's main switchboard. It is written for Clean Energy Council-accredited installers, licensed electricians performing the grid-tie, and their direct-supervision apprentices. Solar PV installation is the intersection of two distinct HRCW categories: Category 3 (fall above 2 m) because the work is on a pitched or low-pitch roof for the entire shift, and Category 9 (energised electrical installation) because solar DC strings self-energise as soon as daylight falls on them and cannot be switched off by a conventional AC isolation. The worker is exposed to both fall risk and electrical risk simultaneously for the full duration of the install — a combination that does not exist in metal roofing or traditional electrical work and that drives the unique controls in this SWMS. Section 299 of the WHS Regulation 2025 requires this SWMS before work commences; the document is CIH-authored and aligns with AS/NZS 5033 for installation of PV arrays, AS/NZS 4777 for grid connection, and AS/NZS 3000 for the consumer-side connection.
Hazards identified
12 hazards covered, sorted by priority.
Fatal or permanent injury from fall to ground or paved area below; most Australian solar-install fatalities are eave-line falls during bracket set-out.
Severe burn injury from a 600-1000 V DC arc that cannot be self-extinguishing; arc persists until physical separation or sundown.
Cardiac arrest from DC shock path through the worker to ground; DC voltage above 120 V is lethal and is present in any series string of two or more panels.
Worker pulled off edge or across roof plane by 1.7 m × 1.1 m panel caught by gust; loss of balance on pitched surface above 35 km/h wind.
Rooftop fire arising from poor MC4 connector seat or crossed polarity; fire fed by panel output until physical disconnection or sundown.
Fall-through of polycarbonate skylight hidden under installation activity; the worker steps backward while positioning a panel.
Toughened glass panel dropping to roof plane and shattering; lacerations to worker and follow-on trades from sharp glass on the roof.
Lumbar and shoulder injury from single-worker carry of panels; loss of balance during ladder ascent with panel.
Water ingress into roof cavity during subsequent rain event; follow-on electrical hazard to cavity wiring.
Heat exhaustion and heat stroke; roof-surface temperatures 60°C+ on dark Colorbond in peak installation periods.
Electrocution from LV aerial or transmission line contact during panel hoist; 1.7 m panel rotating into clearance zone during lift.
Fall from 3-4 m ladder during inverter bracket fix; overreach injury during inverter commissioning.
Control measures
Hierarchy-of-controls order: elimination → substitution → isolation → engineering → administrative → PPE.
- 1Edge protection per AS/NZS 4994.1 installed at the working eave before roof access — perimeter guardrail or catch-platform scaffold is the primary fall control for the full install duration, not only for the panel lay-up phase.
- 2Where edge protection is not reasonably practicable on short-duration residential installs, travel-restraint with AS/NZS 1891.1 harness and AS/NZS 1891.4-certified anchor is the minimum; lanyard length physically prevents reach to edge.
- 3DC cable management — string cables are shrouded and routed away from the work path until connection; MC4 connectors are not assembled until the string is ready to be commissioned; opaque cover over the DC cable ends during handling per AS/NZS 5033.
- 4DC isolator fitted at the rooftop junction box per AS/NZS 5033 and tested for function before any string is connected; DC isolator is the primary emergency-disconnect during install and must be located within reach of the crew.
- 5DC string commissioning is performed by a licensed electrician holding a current state electrical licence and CEC accreditation for grid-connected PV per the Clean Energy Council installation guideline; the accreditation ticket is presented on the SWMS worker sign-on register.
- 6Crossed-polarity prevention — DC continuity test with an appropriate MC4-rated multimeter before any final connection; polarity marked on every cable run; apprentices do not independently make DC connections.
- 7Panel handling in wind — work stop at sustained 35 km/h at roof height; full stop at 50 km/h; panels are carried edge-on rather than flat where wind is present; two-person carry mandatory on pitched roofs.
- 8Roof fragility mapping — skylights and translucent sheets identified and demarcated before panel lay-up commences; fall-through covers (AS/NZS 5532) installed across any fragile area within the panel array footprint.
- 9Panel hoist by roof-hoist or EWP rather than manual ladder carry; where manual carry is the only option, each panel is carried by two workers with defined hand-holds.
- 10Penetration sealing — each mounting-rail bracket is sealed with a manufacturer-approved flashing and butyl seal per the mounting-system installation guide; penetrations are not left un-flashed overnight.
- 11Overhead power line exclusion — 3 m minimum from LV lines, 6.4 m from transmission per SafeWork NSW guidance; where the panel transfer path intersects a service drop, the panel is hoisted via a route that maintains clearance, or the line is de-energised via the network operator.
- 12PPE baseline: Class 0 or Class 00 electrical insulating gloves (AS/NZS 2225) for DC string work, cut-5 gloves for panel handling (AS/NZS 2161.3), Grade II eyewear (AS/NZS 1337.1), arc-rated long-sleeve shirt for commissioning, grip-rated safety footwear (AS/NZS 2210.3), and hard hat with chin strap on pitched roofs.
- 13Heat-stress controls per the Code of Practice: Managing the Work Environment and Facilities — 60-minute rotation above 32°C ambient, shaded rest at ground level, continuous electrolyte availability.
- 14All workers hold a valid White Card; electrician holds current state electrical licence; lead installer holds current CEC PV accreditation; fall-safety refresher within 24 months.
- 15Rescue plan posted before any harness access; trained rescuer identified; rescue kit (EWP, rescue descender, or platform) on site; suspension-trauma window tracked at 5-minute radio check intervals per AS/NZS 1891.4 commentary.
Applicable Codes of Practice
Primary binding fall-protection guidance applied for the full install duration on the roof plane.
Governs isolation, test-before-touch, and LOTO for the AC side; applied with AS/NZS 5033 supplements for the DC side.
Establishes HRCW SWMS duties where solar install is part of new construction or major refit.
Applies to heat-stress controls for dark-roof summer installs.
Technical standard for DC string design, isolator placement, cable management, and marking that defines the primary electrical controls in this SWMS.
Governs inverter selection, anti-islanding, and grid-tie connection requirements.
Consumer-side connection standard for the inverter AC output and the consumer switchboard upgrade.
Accreditation-required install standard for rebate-eligible systems; engages CEC-accredited installer oversight.
High-Risk Construction Work triggered
The full installation is performed on a pitched or low-pitch roof above 2 m; panel lay-up, rail fix, and DC wiring all dwell on the roof for the entire shift.
DC solar strings self-energise under daylight; no amount of switching can de-energise a panel exposed to sun until physical disconnection. The installer is therefore working on energised electrical circuits throughout the string-connection phase.
Impact drivers, rail cutters, and angle grinders are in continuous use during the install; a roof hoist or EWP may be used to transfer panels to the roof.
Because solar PV install triggers HRCW Categories 3, 9, and 13, Section 299 of the WHS Regulation 2025 requires this SWMS before work commences and made available to the Principal Contractor or property owner on request. Section 300 maximum penalty for failure is $36,000 for a body corporate and $7,200 for an individual. A DC arc flash or rooftop fire fatality triggers Category 1 prosecution under Section 31 of the WHS Act — 5 years imprisonment and penalties to $3.46 million for a body corporate. Additionally, installation without current CEC accreditation voids the Small-scale Technology Certificate rebate pathway.
Who this is for
- →Clean Energy Council-accredited solar installers on residential and commercial installs.
- →Licensed electricians performing the grid-tie connection and switchboard upgrade.
- →Solar apprentices operating under direct supervision of an accredited installer.
- →Contracting PCBUs tendering for rooftop solar packages.
- →Facility managers coordinating commercial rooftop PV projects.
What you receive
- ✓Editable Microsoft Word document (.docx, Word 2016 or newer compatible).
- ✓Title page with PCBU, CEC accreditation number, ABN, site address, and system kW field.
- ✓Signed approval block for PCBU, CEC-accredited installer, licensed electrician, and supervisor.
- ✓Hazard register with the 12 solar-install hazards above, each with inherent risk, controls, and residual risk on a 5x5 matrix.
- ✓DC string-commissioning checklist including polarity test, isolator test, and continuity check.
- ✓Fall-arrest rescue plan with suspension-time monitoring and rescuer identification.
- ✓Worker sign-on register and consultation record per Section 47 of the WHS Act.
- ✓Applicable legislation schedule for NSW with a state-variance table.
- ✓Emergency contacts, rooftop-fire response plan, and review-and-update log.
Worked example
A three-person crew — one CEC-accredited installer, one licensed electrician, and one second-year apprentice — is contracted to install a 10 kW rooftop solar array (24 × 415 W panels) on a new two-storey Class 1a dwelling in Penrith. Eave height is 5.8 m with an 18° pitch Colorbond roof. Before work commences the installer completes this SWMS: the installer's CEC accreditation and the electrician's current electrical licence are recorded; perimeter guardrail scaffold is erected at the eave; panels are delivered by the roll-former to the roof via scaffold hoist; DC cables are sheathed and laid before MC4 assembly. At lunchtime on day 2 cloud cover clears and DC string test is conducted with the rooftop DC isolator open and locked; polarity and continuity are verified; strings are closed with the isolator remaining open until the inverter is confirmed ready. Total install: 2 days, no incident; SWMS is closed out with the commissioning certificate and CES signoff.
Related legislation
- Work Health and Safety Act 2011 (NSW) — Section 19 primary duty of care; Section 27 officer due diligence.
- WHS Regulation 2025 (NSW) — r. 78-80 (falls), r. 140-170 (electrical work), r. 298-300 (SWMS for HRCW).
- Electricity Supply Act 1995 (NSW) — Section 44 overhead power line approach distances; connection point requirements.
- Renewable Energy (Electricity) Act 2000 (Cth) — Small-scale Renewable Energy Scheme for STC eligibility.
- Home Building Act 1989 (NSW) — licensing of residential electrical work including solar install.
- Clean Energy Regulator determinations for accreditation and rebate eligibility.
Frequently asked questions
Can the DC side be isolated before connection?
Partially — the rooftop DC isolator per AS/NZS 5033 is opened before string commissioning, but each individual panel remains self-energised in daylight. The SWMS treats the array as live throughout the daylight install window; cable ends are capped with MC4 dust caps until connected, polarity is verified before each string closure, and the DC isolator remains open until the inverter is ready.
Is CEC accreditation mandatory for the install?
CEC accreditation is not a WHS licence, but installation without CEC accreditation voids the Small-scale Technology Certificate rebate pathway under the Renewable Energy (Electricity) Act 2000. The SWMS identifies the accredited installer by CEC number on the title page. Electrical-licence requirements under the Home Building Act are separate and always mandatory.
What wind speed limits panel handling?
The SWMS applies a 35 km/h sustained-wind work stop and a 50 km/h full stop at roof height. A standard 1.7 × 1.1 m panel has approximately 1.9 m² of sail area and is unmanageable by a two-person team above these thresholds. The threshold is measured at roof height with a handheld anemometer, not at ground level.
Does a battery addition require this SWMS?
The SWMS covers rooftop PV install only. A battery addition engages additional standards — AS/NZS 5139 for battery installation and the relevant fire-safety separation. Battery work requires its own SWMS with battery-specific hazards including thermal runaway and battery DC arc risk.
Can the install proceed on a day when the inverter is not yet on site?
Yes, but the DC strings must not be closed at MC4 connectors until the inverter is installed and ready to receive the output. Closed strings with no load create an open-circuit condition that can persist until sundown; the SWMS requires string closure only at commissioning, not at earlier stages of the install.
Document details
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