Solar PV & ESS DC Disconnect Switch Supply – South Carolina Solar Contractors
Power your solar installations with premium DC disconnect switches engineered for South Carolina's demanding climate. ValuAdd delivers UL 98B certified INOSYS and SIRCO disconnect solutions with up to 1500 VDC capacity, visible contact verification, and arc fault containment—essential for safe, compliant solar PV and energy storage systems across the Palmetto State.
Our DC Disconnect Switch Solutions
Complete range of certified disconnect switches engineered for safe, reliable solar PV and energy storage system protection.
INOSYS LBS UL 98B Disconnect Switches
Premium disconnect switches with 750 VDC breaking capacity per pole, visible contacts with arc fault containment, and direct position indication. Rated up to 1500 VDC with current ratings from 10A to 1200A for comprehensive solar installations.
High-performance 1500 VDC rated disconnect switches with 2000A capacity and motorized remote operation. Features patented arc extinguishing technology and environmental testing for salt spray, humidity, and extreme temperatures.
Industrial-grade power circuit protection with double-breaking per pole design and 800 VAC safety isolation. UL 98C certified with current ranges from 400A to 1000A for demanding commercial solar applications.
Compact 100 kA breaking capacity fuse holders with IP2X safety protection and built-in fuse melting indicators. Available in 45-mm modular format for flexible solar combiner box installations.
Engineered configurations for unique solar PV and ESS requirements. Our technical team designs tailored disconnect solutions meeting specific voltage, current, and environmental specifications for South Carolina installations.
Mounting & Accessory Components
Complete installation accessories including busbar supports, cable ties, mounting bases, and connection hardware. All components certified halogen-free with UV resistance for outdoor solar applications.
UL 98B Certified Excellence
Certified Safety & Performance for Solar Installations
South Carolina's solar market demands disconnect switches that withstand coastal humidity, intense summer heat, and storm conditions. Our INOSYS and SIRCO product lines deliver UL 98B and IEC 60947-3 certified performance with visible contact verification, patented arc fault containment, and breaking capacities engineered for modern high-voltage solar arrays. Every switch features tool-free access, non-polarized wiring for faster installation, and operation tested from -40°F to 122°F with no derating required—ensuring your solar investments operate safely year-round.
Proven Performance
Trusted By Industry Leaders
Powering critical solar installations for manufacturers and industrial facilities nationwide.
"ValuAdd provided excellent guidance on selecting the right ROG sensor diameter for our busbar configuration. The integration with our DIRIS meters was seamless."
Sarah Rodriguez
"The quality of American Electrical components through ValuAdd has been outstanding. Their technical datasheets and multilingual support make specification easy."
Sarah Patterson
"ValuAdd's deep knowledge of electrical components and their manufacturer relationships have been invaluable for our panel building projects. They consistently deliver the right solutions."
Mike Johnson
"ValuAdd provided excellent guidance on selecting the right ROG sensor diameter for our busbar configuration. The integration with our DIRIS meters was seamless."
Sarah Rodriguez
"The quality of American Electrical components through ValuAdd has been outstanding. Their technical datasheets and multilingual support make specification easy."
Sarah Patterson
"ValuAdd's deep knowledge of electrical components and their manufacturer relationships have been invaluable for our panel building projects. They consistently deliver the right solutions."
Mike Johnson
"ValuAdd provided excellent guidance on selecting the right ROG sensor diameter for our busbar configuration. The integration with our DIRIS meters was seamless."
Sarah Rodriguez
"The quality of American Electrical components through ValuAdd has been outstanding. Their technical datasheets and multilingual support make specification easy."
Sarah Patterson
"ValuAdd's deep knowledge of electrical components and their manufacturer relationships have been invaluable for our panel building projects. They consistently deliver the right solutions."
Mike Johnson
The ValuAdd Difference
Why Choose ValuAdd for Your Disconnect Switch Needs?
Advanced industrial solutions backed by technical expertise and comprehensive support.
Certified Quality
UL 98B, CE, and IEC certified products meeting South Carolina electrical code requirements and NEC Article 690 solar disconnect specifications.
Technical Expertise
Factory-trained specialists provide component selection guidance, custom engineering solutions, and territory-based support for South Carolina contractors.
Harsh Environment Rated
Products tested for vibration, salt spray, extreme temperatures, and humidity—engineered to excel in South Carolina's coastal and inland conditions.
Fast Delivery
Streamlined logistics and inventory management ensure quick turnaround on standard and custom disconnect switch configurations for time-sensitive solar projects.
Meet Our Technical Specialists
Expert engineers dedicated to your project success.
Michael Johnson
Plant Engineer, Industrial Manufacturing
Michael brings extensive experience in machinery protection and reducing unexpected downtime in manufacturing facilities. His expertise in variable frequency drive installations has helped countless industrial operations achieve optimal motor control and energy efficiency. Michael specializes in troubleshooting complex VFD systems and implementing preventive maintenance programs that extend equipment life and reduce operational costs. His hands-on approach to problem-solving and deep understanding of industrial processes make him an invaluable resource for facilities requiring reliable VFD solutions. Michael's commitment to safety and adherence to industry standards ensures every installation meets the highest quality requirements.
Sarah Rodriguez
Electrical Engineer, System Integrator
Sarah Rodriguez specializes in the selection and implementation of soft starters for critical applications across various industrial sectors. Her technical expertise encompasses medium voltage VFD systems, power monitoring solutions, and integrated control panel design. Sarah's approach to system integration focuses on optimizing performance while ensuring compliance with IEEE 519 standards and NEMA requirements. She has successfully implemented VFD solutions for water treatment facilities, oil and gas operations, and manufacturing plants. Sarah's ability to translate complex technical requirements into practical, reliable solutions has earned her recognition as a trusted advisor for system integrators and facility managers seeking advanced motor control technologies.
Frequently Asked Questions
Do you need a solar disconnect switch?
Yes, the National Electrical Code (NEC) Article 690 requires a readily accessible disconnect means for all solar PV systems. This safety device allows first responders and maintenance personnel to completely de-energize the solar array, protecting both people and equipment during emergencies or service work.
What is the code for solar disconnect switch?
Solar disconnect switches must comply with NEC Article 690.13 through 690.17, which specify requirements for disconnect location, marking, and ratings. The disconnect must be UL 98B listed for DC applications, rated for maximum system voltage and current, and clearly labeled as the solar PV system disconnect.
What voltage rating do I need for my solar disconnect switch?
The disconnect switch must be rated for at least 125% of the solar array's maximum open-circuit voltage. For typical residential systems, this means 600-1000 VDC switches, while commercial installations often require 1500 VDC or higher ratings available in our INOSYS and SIRCO product lines.
Can I use AC-rated disconnect switches for solar DC applications?
No, you must use disconnect switches specifically UL 98B certified for DC use. DC arcs are harder to extinguish than AC arcs, requiring specialized internal arc chambers and contact designs. Using AC-rated switches in DC solar applications creates serious safety hazards and code violations.
How do I determine the correct current rating for my solar disconnect?
Calculate the maximum current from your solar array (sum of all string currents) and multiply by 125% per NEC requirements. Select a disconnect switch rated for this continuous current, plus adequate breaking capacity to safely interrupt fault currents in your specific installation configuration.
What is arc fault containment and why does it matter?
Arc fault containment systems within disconnect switches safely manage and extinguish electrical arcs that occur during switching operations or fault conditions. Our INOSYS switches feature patented arc chambers that prevent arc propagation, protecting surrounding equipment and reducing fire risk in solar installations.
Do your disconnect switches work with energy storage systems (ESS)?
Yes, our SIRCO MOT DC ESS and INOSYS LBS models are specifically engineered for both solar PV and battery energy storage applications. They handle the unique requirements of bidirectional current flow and provide safe isolation for maintenance on battery systems up to 1500 VDC.
What lead time should I expect for disconnect switch orders?
Standard INOSYS and SIRCO configurations typically ship within 5-7 business days. Custom-configured switches or large quantity orders may require 2-3 weeks. Contact our technical team for expedited shipping options on time-sensitive South Carolina solar projects.
Need Help Selecting the Right Disconnect Switch?
Our engineers provide free technical consultations to ensure code-compliant, safe solar installations.
Get Expert Disconnect Switch Guidance for Your Solar Project
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