The APSmart RSD-D (Duo) PLC is a compact, high-performance rapid shutdown device (RSD) designed to enhance safety and code compliance in modern photovoltaic (PV) systems. Engineered with PLC (Power Line Communication) technology, the RSD-D enables module-level shutdown in emergencies or maintenance events—meeting NEC 2017 & 2020 rapid shutdown requirements while maintaining system efficiency and ease of integration.
Built for 1500V UL and 1000V TUV PV systems, the RSD-D (Duo) supports two PV modules per unit, reducing component count and simplifying wiring. With robust environmental protection and flexible cable configurations, it’s the smart safety solution for residential, commercial, and utility-scale installations.
Key Features:
Rapid Shutdown Functionality:Delivers fast, automatic shutdown of PV modules in compliance with NEC 690.12, enhancing firefighter and technician safety during grid loss or manual shutdown.
High Voltage Compatibility:Supports systems up to 1500V (UL) and 1000V (TUV), making it ideal for high-voltage string inverter systems in large residential or commercial solar arrays.
Dual Module Design: Controls two PV modules per device, reducing wiring complexity, saving space, and lowering hardware costs in larger PV arrays.
Flexible Cabling Options:Available with a 0.5m input cable and a 2.2m output cable, allowing for convenient wiring configurations across a range of racking and layout scenarios.
Compact, Low-Profile Design: Engineered for easy mounting under or near PV modules without adding significant bulk to the system.
Durable, Weather-Resistant Construction:Built for long-term outdoor use, the RSD-D withstands harsh environmental conditions including heat, moisture, and UV exposure.
Applications:
NEC-Compliant PV Systems (2017 & 2020 Code)
Residential & Commercial Solar Arrays
High-Voltage PV Installations (Up to 1500V)
Module-Level Safety Solutions for Fire & Service Access
What’s Included:
1 × APSmart RSD-D (Duo) PLC Unit
Factory-Installed Input/Output Cables
Installation Manual & Safety Guidelines
Specifications
Model
RSD-D (duo) PLC
Current Rating
20A
Voltage Rating
1500V UL / 1000V TUV
Input Cable Length
0.5m
Output Cable Length
2.2m
Shopping Guide
Power Storage & Inverter
Item / Appliance
Typical Power (W)
Usage Time (hrs)
Total Energy Needed (Wh)
Battery Size Needed (Ah) (12V System)
Inverter Size Needed (W)
LED Light Bulb (10W)
10W
5 hrs
50 Wh
4.2 Ah
100W
Phone Charging
5–10W
2 hrs
10–20 Wh
0.8–1.7 Ah
100W
Laptop Charging
50–100W
3 hrs
150–300 Wh
12.5–25 Ah
200W
Ceiling Fan
75W
6 hrs
450 Wh
37.5 Ah
150W
LED TV (32")
60W
4 hrs
240 Wh
20 Ah
150–200W
Refrigerator (Mini)
100W (avg)
8 hrs
800 Wh
66.6 Ah
300–500W
Water Pump (1HP)
750W
1 hr
750 Wh
62.5 Ah
1000W
Microwave Oven
1000W
0.5 hr
500 Wh
41.6 Ah
1200–1500W
Electric Kettle
1500W
0.3 hr
450 Wh
37.5 Ah
2000W
Key Formulas
Purpose
Formula
Example
Energy Consumption (Wh)
Watts × Hours
60W × 4 hrs = 240 Wh
Battery Capacity (Ah)
Watt-hours ÷ System Voltage (V)
240 Wh ÷ 12V = 20 Ah
Inverter Size (W)
Total Watts × 1.25 (for safety margin)
300W × 1.25 = 375W → Use 400W inverter
Total Load Power (W)
Sum of all appliance watts to be used at once
Light (10W) + Fan (75W) = 85W
Runtime (hrs) of Battery
(Battery Ah × Voltage) ÷ Total Load (W)
(100Ah × 12V) ÷ 240W = 5 hrs
How To Choose The Right Products
Need / Application
Recommended Battery
Inverter Size
Notes
Basic lighting + phone charging
50Ah – 100Ah (12V)
100W–200W
For small backup setups
Home office (laptop, fan, TV)
150Ah – 200Ah (12V or 24V)
500W – 1000W
For moderate usage with 4–6 hours of backup
Home backup (fridge, lights)
200Ah+ (24V or 48V recommended)
1000W – 1500W
Ideal for longer backups or heavier loads
Business / shop power backup
300Ah+ (48V system)
2000W – 3000W
Suitable for commercial setups or extended power outages
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