FranklinWH RSD Duo
Rapid Shutdown, Redefined to Reduce Installer Callbacks and Truck Rolls
FranklinWH RSD Duo
The FranklinWH RSD Duo is a code-required enhanced rapid shutdown device (RSD) for rooftop solar. With dual-circuit reliability, lower operating temperatures, and integration with the FranklinWH System, the RSD Duo is built to minimize solar downtime caused by device failures, helping installers reduce unnecessary post-installation service trips.
Required by Code,
Tested by Tough Roof Conditions
Rapid shutdown is a code requirement for building-mounted solar systems in the U.S., but it may also present long-term reliability challenges for installers after RSD installation.
Harsh Rooftop Environments
RSDs are mounted under solar modules, where heat, moisture, corrosion, wiring stress, and access difficulty put RSD reliability to the test.
Emergency Safety
Code-required rapid shutdown helps reduce electrical hazards during emergencies, protecting firefighters and other first responders.
Increased Service Burden
An RSD failure can require troubleshooting across multiple solar modules and lead to costly, unplanned rooftop service visits.
Lower Temperatures for More Stable Operation
High Voltage Tolerance up to 600 V Per String
The RSD Duo is engineered for high-voltage conditions of rooftop solar, with the capability to withstand up to 600 V per string, effectively protecting critical components from breakdown due to electrical overstress, contributing to a safer and more durable solar installation.
The typical example is the high-voltage-rated MOSFETs, reliably shielding against transient overvoltage surges that may otherwise damage traditional RSDs, decreasing unexpected performance issues that require return visits.
- Resists transient overvoltage surges
- Protects against reverse-polarity installation errors
Higher Installation
Efficiency
with Fewer Devices
The RSD Duo is designed to serve three solar modules simultaneously, reducing rooftop RSDs by up to two-thirds compared with traditional 1-to-1 designs. This approach simplifies installation while reducing required equipment.
Devices for an 18-Module System
Traditional
1 - to - 1 Design needs
FranklinWH RSD Duo
1 - to - 3 Design
only needs
Actual configuration and RSD Duo quantity may vary depending on solar design, mounting conditions, and installation requirements. Refer to the installation manual for more details.
1-to-3 Design
Fewer RSDs are needed, reducing installer workload.
String-Level Configuration with 2 RSD Duos
Two RSD Duos can be deployed to enable rapid shutdown at the string level, provided the devices are insulated with mounting brackets.
Flexible Mounting
Designed for installation with frame clip or racking rail mounting for different rooftop solar layouts.
Up to 5.9″ Connection Cable
Improves installation flexibility while reducing cable routing strain.
Built for
Extended
Service Life
The RSD Duo provides long-term durability under outdoor exposure, achieved through robust environmental protection, a durable enclosure, and a reinforced internal structure that resists stress and deformation.
IP67 Rating
Seals against
dust and water.
C5-H Corrosion Resistance
Performs consistently in highly corrosive environments, including coastal areas.
Injection Molded Housing
Improves enclosure strength
and integrity.
Ultrasonic Welding
Creates a durable, permanent enclosure seal that resists cracking, moisture, and impact damage.
RSD Duo
The Perfect Companion to the FranklinWH with aPower S
The RSD Duo is engineered for the FranklinWH System with aPower S in new solar and storage projects. Alongside the built-in transmitter in the aPower S and advanced signal communications technology, the RSD Duo eliminates external transmitter installation and cabling while enabling reliable shutdown communication across solar circuits.
Integrated
Transmitter
Saves around 20-Minutes Per System Install
Up to 984 ft Signal Distance
Power Line Excitation (PLE)*
Signal Architecture
* Signals using existing power lines without a separate dedicated cable.
FranklinWH
RSD Duo Specs
Datasheet PERFORMANCE SPECIFICATIONS
Name
FranklinWH RSD Duo (RSD Duo)
Maximum System Voltage
600 Vdc
Range of Input Operating Voltage
0 - 330 Vdc
Maximum Current
15 A
Maximum Short Circuit Current
20 A
Maximum Number of Devices per String
5
Control
Power Line Excitation
Certifications
UL1741, UL3741, FCC Part 15 Class B
MECHANICAL SPECIFICATIONS
Dimensions
2.0 in (W) × 5.8 in (H) in × 0.8 in (D)
49.6 mm (W) × 147.0 mm (H) × 21.0 mm (D)
Mounting
Module frame or rail channel
Electrical Connection
MC4-Evo 2 connector
ENVIRONMENTAL SPECIFICATIONS
Enclosure Type
NEMA 4X / IP67
Operating Temperature Range
-22°F to 167°F (-30°C to 75°C)