RR Credit: Alternative Source Supply – Above Green

(1-5 points)

Applicable to: Cities & Utilities, Campuses, Transit

INTENT

To improve reliability and resilience by providing an alternative source of electricity supply and transfer controls.

REQUIREMENTS

All projects

OPTION 1. Alternative supply (2 points)

Have in place provisions for alternative sources of power supply for at least 40% or 80% of the project load in case the primary power supply fails. Choose one or more of the following:

Alternative (or secondary) feeder from bulk grid
Generation outside the project boundary (at the neighborhood level)
Project-owned or project-operated backup power system

Calculate the fraction of the project load, including all critical loads that is protected by backup power supply options. Points are awarded according to Table 1.

Table 1. Points for alternative supply

Project load with backup power supply (%)	Points
≥ 40	1
80	2

AND/OR

OPTION 2. Transfer controls (1–3 points)

Demonstrate advanced capability to transfer control from grid-connected mode to complete or partial island mode and back again. Points are awarded according to Table 2.

Table 2. Points for transfer controls

Transfer Capability	Points
Automatic and quick transfer	1
Seamless transfer	2
Ride-through	1