PVSTOP: Solar Panel Block Out Solution

Solar panels are a great way to generate clean energy – but they pose serious risks during emergencies. Knowing how to “stop” solar panels during a fire is critical, because even when inverters or isolators are switched off, panels can continue generating electricity whenever exposed to light. This means systems can stay live, creating hazards for firefighters, maintenance teams, and anyone working nearby.

This is where PVSTOP come in, helping to safely de-energise panels when it matters most.

As the Northern Ireland distributor for Britannia Fire, we supply PVSTOP as a practical and effective way to reduce these risks.

Why Are Solar Panels Dangerous During a Fire?

One of the biggest misconceptions is that solar PV systems can be fully switched off in an emergency, but that’s not always the case.

Even when inverters or isolators are turned off, panels exposed to daylight will still produce DC voltage. This means systems can remain live, leading to:

• Electrical shock risk – live DC components remain energised
• Arc flashes and burns – especially if cables are damaged
• Firefighting complications – crews must treat systems as live
• Maintenance risks – unsafe working conditions during faults

Because of this, stopping solar panels during a fire isn’t straightforward using conventional methods alone. While isolators can stop power flowing into a building, they don’t stop panels generating electricity while exposed to light.

This is the key issue that solutions like PVSTOP are designed to address.

How PVSTOP Works

PVSTOP is a light-blocking liquid polymer that is sprayed directly onto solar panels.

Once applied, it forms a dry, peelable coating that:

• Blocks sunlight instantly, stopping electricity generation
• Reduces electrical risk for emergency responders and engineers
• Creates a safer working environment during fire or maintenance
• Can be easily removed without damaging the panels

By cutting off the light source, PVSTOP effectively de-energises the system at the panel level.

Key Benefits of PVSTOP

• Immediate reduction in solar panel voltage
• No damage to PV modules
• Quick and simple to deploy
• Suitable for rooftops and large-scale arrays
• Performs reliably in all weather conditions

Who Needs Solar Panel Shutdown Solutions?

PVSTOP is particularly useful for:

• Fire and rescue services
• Facility and property managers
• Solar PV operators and maintenance teams
• Electrical contractors working on live systems

Especially in environments where systems cannot be fully isolated.

Important: PVSTOP Is Not a Fire Extinguisher

It’s worth being clear – PVSTOP is not designed to extinguish fires.

Its purpose is to reduce electrical hazards by stopping solar panels from generating power, making firefighting and maintenance operations safer.

PVSTOP is the only solar safety solution to achieve ISO 14034:2016 Environmental Technology Verification, with independent testing confirming effectiveness. The technology has been operationally validated by major fire services worldwide, including London Fire Brigade (LFB), Fire Department New York (FDNY), and Singapore Civil Defence Force (SCDF).

PVSTOP Supply in Northern Ireland

We supply PVSTOP across Northern Ireland, supporting businesses, contractors, and emergency services with both product access and guidance.

If you need a safe way to manage live solar panels during emergencies or maintenance, get in touch for more information or a quote.