- Description
- Key Features
- Applications
- Installation Procedure
- Specifications
- FAQs
TESLA MCI-1 MID-CIRCUIT INTERRUPTER
Rapid Shutdown Device for Tesla Solar PV Systems
Overview
The Tesla MCI-1 Mid-Circuit Interrupter is a safety device designed for photovoltaic systems to meet rapid shutdown requirements under NEC 690.12. Installed directly within solar PV strings, the device interrupts the circuit during shutdown events to quickly reduce voltage levels across the array.
When paired with Tesla Solar Inverters and compatible solar equipment, the MCI-1 helps create a compliant rapid shutdown system that enhances firefighter and installer safety while protecting the PV system during maintenance or emergency conditions.
Key Features
- • NEC Rapid Shutdown Compliance – Designed to meet NEC 690.12 PV rapid shutdown requirements
- • Tesla System Integration – Works with Tesla Solar Inverter and Powerwall systems
- • Inline PV Installation – Installs directly within solar module strings
- • High Durability – NEMA 4X / IP65 rated enclosure for outdoor installations
- • Long Lifespan – Designed for long-term reliability with a 25-year warranty
Applications
- • Residential rooftop solar installations
- • Tesla Powerwall-connected PV systems
- • Tesla Solar Inverter installations
- • Rapid shutdown compliant PV arrays
- • New solar installations or system upgrades
Installation Procedure
Follow these simplified steps when installing the Tesla MCI-1 Mid-Circuit Interrupter within a solar PV string. Always follow Tesla documentation and local electrical codes. NOTE: A Tesla-Certified Installer is required for this installation.
- Mount the device – Secure the MCI-1 to the module frame or mounting structure near the solar panel.
- Connect the PV module leads – Plug the panel’s positive and negative MC4 connectors into the MCI-1 input connectors.
- Connect the string output – Attach the MCI-1 output leads to the next module or PV string wiring.
- Route cables properly – Secure and organize wiring to prevent strain, abrasion, or exposure to sharp edges.
- Verify system connections – Confirm polarity, secure connectors, and test the system before energizing the array.
Specifications
-
Electrical Ratings Nominal Input Current: 13A
Maximum Short Circuit Current (ISC): 19A
Maximum System Voltage: 600V DC
Maximum Disconnect Voltage: 600V DC -
Mechanical Dimensions: 125 × 150 × 22 mm (5 × 6 × 1 in)
Weight: 350 g (0.77 lb)
Connections: MC4 Compatible Connectors -
Environmental Operating Temperature: -40°C to 50°C (-40°F to 122°F)
Enclosure Rating: NEMA 4X / IP65
Outdoor Rated: Yes -
Compliance & Warranty Certifications: UL 1741 PVRSE, UL 3741
Rapid Shutdown Type: Photovoltaic Rapid Shutdown Device
Warranty: 25 Years
Tesla MCI-1 Mid-Circuit Interrupter | Rapid Shutdown Device | NEC 690.12 Compliant | Solar PV Safety Component | Tesla Solar Inverter Compatible
Frequently Asked Questions
The Tesla MCI-1 is a 600V mid-circuit interrupter used in solar PV systems to improve safety by allowing controlled interruption of DC circuits.
It provides enhanced safety by enabling rapid shutdown and circuit interruption in emergency situations, helping protect people and property.
It is installed within the solar PV string circuit, typically between solar panels or at specific points in the array depending on system design.
In many regions, mid-circuit interrupters or rapid shutdown devices are required to meet electrical code and solar safety standards.
The MCI-1 is rated for up to 600V DC systems.
It is compatible with most standard solar PV modules, depending on system configuration and design.
It reduces electrical risk by allowing fast shutdown of solar circuits during emergencies such as fires or maintenance work.
Yes, it can be installed in both new and retrofit solar PV systems depending on layout and compliance needs.
No, it is a passive safety device that does not require regular maintenance.
Yes, installation must be done by a qualified solar or electrical installer to ensure proper function and safety compliance.
Yes, it is designed to support rapid shutdown requirements in modern solar installations.
Your payment details are safe and secure. We accept the following:
Tesla 600V Solar Mid-Circuit Interrupter - MCI-1
Our solar specialists are here to help. Whether you’re exploring options or need guidance on your project, feel free to reach out anytime.
- Description
- Key Features
- Applications
- Installation Procedure
- Specifications
- FAQs
TESLA MCI-1 MID-CIRCUIT INTERRUPTER
Rapid Shutdown Device for Tesla Solar PV Systems
Overview
The Tesla MCI-1 Mid-Circuit Interrupter is a safety device designed for photovoltaic systems to meet rapid shutdown requirements under NEC 690.12. Installed directly within solar PV strings, the device interrupts the circuit during shutdown events to quickly reduce voltage levels across the array.
When paired with Tesla Solar Inverters and compatible solar equipment, the MCI-1 helps create a compliant rapid shutdown system that enhances firefighter and installer safety while protecting the PV system during maintenance or emergency conditions.
Key Features
- • NEC Rapid Shutdown Compliance – Designed to meet NEC 690.12 PV rapid shutdown requirements
- • Tesla System Integration – Works with Tesla Solar Inverter and Powerwall systems
- • Inline PV Installation – Installs directly within solar module strings
- • High Durability – NEMA 4X / IP65 rated enclosure for outdoor installations
- • Long Lifespan – Designed for long-term reliability with a 25-year warranty
Applications
- • Residential rooftop solar installations
- • Tesla Powerwall-connected PV systems
- • Tesla Solar Inverter installations
- • Rapid shutdown compliant PV arrays
- • New solar installations or system upgrades
Installation Procedure
Follow these simplified steps when installing the Tesla MCI-1 Mid-Circuit Interrupter within a solar PV string. Always follow Tesla documentation and local electrical codes. NOTE: A Tesla-Certified Installer is required for this installation.
- Mount the device – Secure the MCI-1 to the module frame or mounting structure near the solar panel.
- Connect the PV module leads – Plug the panel’s positive and negative MC4 connectors into the MCI-1 input connectors.
- Connect the string output – Attach the MCI-1 output leads to the next module or PV string wiring.
- Route cables properly – Secure and organize wiring to prevent strain, abrasion, or exposure to sharp edges.
- Verify system connections – Confirm polarity, secure connectors, and test the system before energizing the array.
Specifications
-
Electrical Ratings Nominal Input Current: 13A
Maximum Short Circuit Current (ISC): 19A
Maximum System Voltage: 600V DC
Maximum Disconnect Voltage: 600V DC -
Mechanical Dimensions: 125 × 150 × 22 mm (5 × 6 × 1 in)
Weight: 350 g (0.77 lb)
Connections: MC4 Compatible Connectors -
Environmental Operating Temperature: -40°C to 50°C (-40°F to 122°F)
Enclosure Rating: NEMA 4X / IP65
Outdoor Rated: Yes -
Compliance & Warranty Certifications: UL 1741 PVRSE, UL 3741
Rapid Shutdown Type: Photovoltaic Rapid Shutdown Device
Warranty: 25 Years
Tesla MCI-1 Mid-Circuit Interrupter | Rapid Shutdown Device | NEC 690.12 Compliant | Solar PV Safety Component | Tesla Solar Inverter Compatible
Frequently Asked Questions
The Tesla MCI-1 is a 600V mid-circuit interrupter used in solar PV systems to improve safety by allowing controlled interruption of DC circuits.
It provides enhanced safety by enabling rapid shutdown and circuit interruption in emergency situations, helping protect people and property.
It is installed within the solar PV string circuit, typically between solar panels or at specific points in the array depending on system design.
In many regions, mid-circuit interrupters or rapid shutdown devices are required to meet electrical code and solar safety standards.
The MCI-1 is rated for up to 600V DC systems.
It is compatible with most standard solar PV modules, depending on system configuration and design.
It reduces electrical risk by allowing fast shutdown of solar circuits during emergencies such as fires or maintenance work.
Yes, it can be installed in both new and retrofit solar PV systems depending on layout and compliance needs.
No, it is a passive safety device that does not require regular maintenance.
Yes, installation must be done by a qualified solar or electrical installer to ensure proper function and safety compliance.
Yes, it is designed to support rapid shutdown requirements in modern solar installations.
Your payment details are safe and secure. We accept the following:
Frequently asked questions
Find answers to common questions about our products and services
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We accept returns in accordance with our Return & Refund Policy. Please review the full details here:
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Yes. Net 30 is available for approved customers on second and subsequent orders only. Not available on first orders.
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