In an emergency, module output voltage is driven down to a safe level within seconds, protecting firefighters and on-site personnel.
Under normal operation an inverter has an AC isolator that cuts the feed to the grid. But solar modules keep generating as long as there is light. A Rapid Shutdown device (RSD) acts as a safety switch, quickly bringing module output voltage down to a safe level in an emergency, protecting firefighters and on-site personnel.
Hey Solar is an Advansol RSD distributor, providing system compatibility assessment and technical support to ensure seamless integration and compliance with strict fire safety codes.
Module-level shutdown: every module de-energised independently
Compliant with US NEC 690.12-2014 / 2017 / 2020 PV safety requirements: module-level rapid shutdown, bringing module voltage below 1V within 30 seconds.
From basic rapid shutdown to monitoring and yield optimisation. Pick what your roof actually needs.
Module-level rapid shutdown, bringing module voltage below 1V within 30 seconds; compliant with US NEC 690.12-2014/2017/2020 PV safety requirements, automatically disconnecting each module's output in an emergency.
Beyond rapid shutdown, it supports a 1:1 digital twin plant, monitoring each module's power, voltage and current in real time and uploading to the Acloud platform.
Adds module-level MPPT optimisation, lifting generation by 10%–30% and installed capacity by 30%+, unaffected by partial shading or differing roof orientations.
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DCON-S (R series), DCON-4G / DCON-WIFI (MR / MRO series); supports 4 / 12 / 20 strings; all-in-one design, plug and play, one-touch control, remote shutdown.
Manual shutdown: press the button → warning light on → system shuts down within 30 seconds; restore with a reset.
Module-level data monitoring, big-data analytics, early warning and proactive O&M; remote rapid shutdown via Web / App, cutting intelligent O&M costs by 50%.
On site or remote: module output is cut at the first sign of trouble.
Triggers automatically when the system detects a fault. No manual intervention needed.
Press the on-site emergency button to trigger shutdown; the warning light comes on at the same time.
One-touch remote shutdown anytime through Acloud Web / App.
Rapid shutdown triggers automatically when the AC side loses supply.
Module-level rapid shutdown, PLC power-line communication, IP68 protection: key electrical and environmental figures, all engineered for rooftop safety and long-term reliability.
| Parameter | Details |
|---|---|
| Shutdown response time | Module voltage reduced below 1V within 30 seconds (safety mode) |
| Input voltage range | 10V – 80V (MRO series 10V – 70V) |
| Maximum efficiency | > 99.5% |
| Communication | PLC (power-line carrier), no extra communication cabling required |
| Protection / operating temp. | IP68 / -40°C to +85°C |
| Maximum system voltage | 1000V / 1500V |
| Safety certifications | UL1741, CSA C22.2 No.107.1, CSA C22.2 No.330, FCC Part 15b, RoHS |
| Mounting | M6 bolt-fixed or clip-on, fitting rails or module frames |
| Compatibility | Compatible with any third-party PV inverter |
Reduces the electrocution risk from high-voltage DC on the roof during firefighting operations.
Meets Singapore's fire safety and grid-connection related safety requirements.
Fast isolation in an emergency means less equipment damage.
Learn more about system safety and rapid shutdown for a safer, more compliant PV system.
