Modern solar panels are among the safest electrical systems in your home — when installed correctly by licensed professionals. This guide covers Malaysian fire safety standards, common risk factors, and Trexon's prevention practices.
The short answer: no — not when installed correctly. Modern solar panels are manufactured to rigorous IEC safety standards and have an excellent safety record globally. Fire incidents in properly installed systems are extremely rare.
Global data consistently shows solar-related fire incidents at approximately 0.006% of installed systems. By comparison, conventional household electrical faults cause fires at a far higher rate. When solar fires do occur, the cause is almost always poor installation practice or maintenance neglect — not the panels themselves.
In Malaysia, all grid-connected solar systems must comply with MS IEC 62446, Suruhanjaya Tenaga electrical regulations, and must be installed by a licensed ST wireman. These requirements, when followed, make residential solar one of the safest electrical additions to your home.
Reality: Panels are rated to withstand 1,000V DC and extreme temperatures. Panel fires are extremely rare — typically caused by installation faults, not the panels.
Reality: Most panels have Class C fire rating minimum. Premium panels are Class A-rated. Fire spread from panels to roof is very rare and typically requires pre-existing installation defects.
Reality: BOMBA and civil defence crews in Malaysia are trained in solar fire response. The key is avoiding the DC cable run — panels can be safely isolated by covering or by nightfall.
Understanding what actually causes solar fires helps homeowners make informed decisions about installer selection and maintenance.
Poorly crimped or loose DC connections create resistance at the contact point. Over time, this generates heat that can ignite cable insulation or adjacent roofing materials. The most common cause of solar fires globally.
Non-licensed electricians who skip DC isolators, use undersized cables, or fail to properly manage cable routing create compounding risk. Illegal installations are both unsafe and void your insurance coverage.
Unlike AC circuits which self-extinguish when interrupted, DC arcs can sustain at voltages as low as 50V. A compromised DC cable between panels and inverter can arc continuously, igniting insulation or roofing materials.
Rats and squirrels nesting under rooftop solar arrays frequently chew DC cables. Damaged insulation exposes live DC conductors that can arc against each other or against metal mounting frames.
Solar PV systems in Malaysia must comply with multiple overlapping safety frameworks governing electrical, fire, and structural safety.
Governs documentation, commissioning testing, and periodic inspection requirements for grid-connected PV systems. Mandates insulation resistance, earth continuity, and polarity testing.
BOMBA requires fire risk assessments for solar installations on certain building types. Installers must ensure fire brigade access is not compromised by panel placement.
All electrical work must be by a licensed ST wireman. ST inspects and approves the system before NEM connection. Non-compliant installations face fines and disconnection.
For commercial and industrial solar, CIDB (Construction Industry Development Board) contractor registration applies. Structural penetrations must meet building code requirements.
Six specific safety measures built into every Trexon residential and commercial solar installation.
Every Trexon installation is designed, supervised, and signed off by a licensed Suruhanjaya Tenaga (ST) wireman. This is a legal requirement in Malaysia and the single most effective safety measure.
We install a DC isolator as close to the panels as practicable — allowing the DC circuit to be safely isolated before working on the roof or during emergencies, without touching live cable runs.
Trexon uses only genuine, brand-matched MC4 connectors — never mixing connector brands, which can create poor contact and arcing. All connectors are crimped with calibrated tools and pull-tested after installation.
All DC cables are run in UV-resistant conduit or cable trays with adequate support spacing. Cables under the array are clipped and protected against UV degradation and rodent access.
Our inverters include ground fault detection (GFDI) that automatically shuts down the system if insulation breakdown is detected — preventing the gradual fault that often precedes arc events.
Available as part of maintenance packages — thermal cameras identify hot spots in panels, connectors, and cables long before they become dangerous, catching manufacturing defects and installation issues early.
If you smell burning or see smoke near your solar system, follow these steps in order. Share this guide with all household members before you need it.
Turn off the solar AC isolator switch (labelled "Solar" or "PV") near your main distribution board. This disconnects the inverter from your home circuits.
Switch off your main circuit breaker to isolate all household electricity. This prevents any fault from spreading through your building wiring.
The DC cables from roof to inverter remain live as long as sunlight hits the panels. Do not touch, cut, or attempt to disconnect DC cables. Leave this to emergency services.
Alert BOMBA immediately if smoke or fire is visible. Inform them it is a solar system — they will know to avoid DC cable runs. Contact your installer for emergency support.
Water is electrically conductive. Spraying water on DC cables, the inverter, or panels while the system is live can create electrocution risk. BOMBA crews are trained in solar fire response.
Common concerns from Malaysian homeowners and property owners about solar panel fire safety.
Modern solar panels are very safe when installed correctly by licensed professionals. Global data shows solar-related fires occur at a rate of approximately 0.006% — meaning fewer than 1 in 16,000 installations experiences any fire incident. The vast majority of solar fires are caused by poor wiring, unqualified installation, or faulty DC connectors — not by the solar panels themselves. Choosing a licensed ST wireman installer and following Malaysian safety standards effectively eliminates this risk.
Solar PV installations in Malaysia must comply with MS IEC 62446 (Photovoltaic Systems — Requirements for Testing, Documentation, and Maintenance), the Suruhanjaya Tenaga (Energy Commission) Grid Connection Code, BOMBA (Fire and Rescue Department) building fire safety requirements, and all Electrical Wiring Regulations under the Electricity Supply Act. Additionally, all electrical work must be signed off by a licensed ST (Suruhanjaya Tenaga) wireman — an illegal or unqualified installation is both unsafe and non-compliant.
The most common causes of solar-related fires are: (1) Poor wiring connections — loose or corroded DC connections creating resistance heat; (2) Unqualified installers — non-licensed workers who skip proper cable management and safety components; (3) DC arc faults — electrical arcing in the DC circuit between panels and inverter, which is particularly dangerous because DC arcs are self-sustaining; (4) Rodent damage — rats and squirrels chewing through DC cables under poorly protected roof installations. None of these risks are inherent to the panels themselves — they are all preventable with proper installation practice.
Most Malaysian home insurance policies cover solar panel systems as part of the building structure, but you should notify your insurer when you install solar. Some insurers may require documentation of the ST wireman sign-off and SEDA registration as proof of compliant installation. Improperly installed systems (without licensed wireman certification) may void your insurance in the event of a fire. Trexon provides full documentation including wireman certification, test reports per MS IEC 62446, and commissioning records for insurance purposes.
If you detect burning smells, smoke, or see visible sparks near your solar system: (1) Immediately turn off the AC isolator (the switch near your main distribution board labelled "Solar" or "PV System"); (2) Turn off your main circuit breaker; (3) Do NOT attempt to isolate the DC side yourself — DC cables from roof to inverter remain live as long as sunlight hits the panels; (4) Evacuate the building if smoke is visible; (5) Call BOMBA (994) and your solar installer. Never spray water on the DC cable run or panels — water is conductive and DC circuits do not break like AC when interrupted.
Yes — Trexon includes thermal imaging inspection as part of its premium maintenance packages. Thermal cameras detect hot spots in panels, DC connectors, and cable terminations that indicate developing faults — long before they become dangerous. We also conduct visual inspections of MC4 connectors, cable management, and DC isolator condition annually. For systems older than 5 years, we recommend a full electrical inspection including insulation resistance testing per MS IEC 62446.
Trexon offers thermal imaging inspections, electrical safety audits, and MS IEC 62446 compliance checks for existing solar installations — giving you peace of mind and documented proof of system safety.
Safety inspections include thermal imaging, insulation testing, and written safety report.
Annual and bi-annual maintenance plans for residential and commercial solar PV systems in Malaysia
Common solar system issues — low output, inverter faults, and monitoring errors — and how to diagnose them
End-to-end guide to solar PV systems — from sunlight to electricity to TNB net metering exports