⚡ NEC 690.12 Module-Level Rapid Shutdown (Decay <30V within 30s at 1-ft Boundary)

Solar Rapid Shutdown (NEC 690.12) Calculator

Size module-level Rapid Shutdown Systems (RSS using Tigo / APsystems / SolarEdge MLPE transmitters and receivers) under NEC 690.12 & UL 1741: calculate DC voltage decay rate (dropping array conductors outside 1-foot boundary to <30V within 30 seconds of AC grid loss for firefighter safety), PLC signal attenuation, and solar electrical profits.

1. Project & Operating Inputs

Solar Modules Protected with MLPE (Module Count e.g. 1,800 Modules)

PLC Transmitter Transmit Power (Transmitters e.g. 4 RSS Transmitters)

Customer Bid Price for Supplied & Landed MLPE Rapid Shutdown ($ / Module)

UL 1741 MLPE Receivers, Din-Rail Transmitters, Testing & Electricians ($)

2. Financial Breakdown & Yield

NEC 690.12 RAPID SHUTDOWN (RSS)

Turnkey RSS Package Profit

Solar Electrical Safety Margin

0.0%

Gross Revenue / Bill

Total Project CapEx

Operating / Material Cost