Why Choose the IMO SI16-PEL64R-4 DC Isolator?
The IMO SI16-PEL64R-4 is a purpose-built 16 A four-pole DC isolator switch specifically engineered for photovoltaic (PV) installations. Unlike AC switches adapted for DC applications, the SI16 Series is designed as a true DC isolator, providing safe and reliable disconnection between solar panel arrays and DC/AC inverters. It supports two-string PV systems and delivers dependable arc suppression for enhanced operational safety.
Supplied in a robust IP67-rated thermoplastic enclosure, the SI16-PEL64R-4 offers excellent protection against dust, water and harsh outdoor conditions. The lockable rotary handle incorporates IMO's Safelock function, allowing the switch to be secured in the OFF position during maintenance to prevent accidental reconnection.
Featuring a high-speed trigger mechanism, knife-edge contacts and integrated arc cooling chambers, the SI16-PEL64R-4 rapidly extinguishes DC arcs, making it ideal for residential, commercial and industrial solar PV systems requiring safe DC isolation.
Key Advantages
- Purpose-designed true DC isolator for photovoltaic systems.
- 16 A rated current with four-pole switching.
- Supports two PV strings.
- IP67 weatherproof enclosure for indoor and outdoor installation.
- Patented Safelock lockable OFF handle.
- High-speed switching with integrated arc suppression.
Key Features
- Model: SI16-PEL64R-4
- Rated current: 16 A
- Maximum DC voltage: 600 V DC
- Four-pole configuration (2 strings).
- 1000 V DC insulation voltage (up to 1500 V insulation depending on installation category).
- Operator-independent snap-action switching.
- Knife-edge contacts with arc cooling chambers.
- Lockable OFF rotary handle.
- Flame-retardant thermoplastic enclosure.
- Suitable for photovoltaic DC isolation.
Designed Specifically for Solar PV Systems
Unlike conventional AC switches, the IMO SI16-PEL64R-4 has been engineered specifically for switching direct current generated by photovoltaic arrays. Its spring-assisted operating mechanism rapidly opens the contacts while integrated arc cooling chambers extinguish the DC arc within milliseconds, helping maximise both safety and switch longevity.
The compact enclosure, weatherproof construction and lockable operating handle make the isolator suitable for rooftop solar installations, commercial PV systems, battery storage applications and inverter isolation points requiring reliable long-term performance.
Typical Applications
- Residential solar PV systems.
- Commercial photovoltaic installations.
- Solar inverter isolation.
- Battery energy storage systems.
- Renewable energy projects.
- Two-string photovoltaic arrays.
- DC power distribution systems.
