Page 59 - CARILEC CE Journal CEMAY2021

DESCRIPTION
Early Developments: Scoping for the Caribbean IUS Model (Phases I and II)
Work towards the implementation of the IUS Model in the Caribbean has been undertaken in three (3) Phases;
the first two are completed while the third is currently underway.

During Phase I, the general concept for the IUS Model for the region was successfully developed in consultation
with regional and national stakeholders.

w. regulated WACC,
Regulator Opt-in on-bill refinance tariff
tied to meter
IUS Market Platform Utility Debt Finance
On-bill customized tariff, tied to meter Principal + Interest Institutes
Electricity cost Savings - DR Payments

Clients: Opt.: DR Resources incl. storage, EV, etc
-Commercial
-Public Sector CAPEX + O&M
-Residential Pre-qualification Quality assurance
-Industrial Sector
Legend:
Installation + O&M + sM&V
Information
Independent Advice
Technical Energy
Service Providers Contracts
Energy Service
Cash Flows
Facilitators (Opt)
independent M&V

Figure 1: IUS Open Market Platform Model (Bleyl et al. 2017)

The base model for the IUS in the Caribbean The utility pays the upfront capital cost to any
considered the experiences and lessons learned pre-qualified technology service provider (of the
from the 5 IUS models and programs currently customer’s choice).
implemented in several regions and markets
worldwide. The general IUS Model for the Caribbean • Regulator – Through a rate hearing or tariff
centres on an open market platform for EE, RE and submission, approves the on-bill tariff to be
DR projects. Based on the goals stated earlier, the implemented by the utility to support the IUS
open market platform model was developed for the model.
Caribbean and is illustrated in the figure below:
In this open market platform model, the regulator • Utility Customers – Customers interested in
and the utility agree on a voluntary “opt-in on-bill implementing demand-side EE or RE project behind
tariff” for utility investments behind the meter. The the meter. The technology solutions are dependent
optional and voluntary on-bill tariff becomes an on the customer’s choice and preference (potentially
additional line item on the electricity bill, only for within a utility-defined framework of options).
those customers who choose to participate in the
programme. It is customised based on the utility’s • Technology Service Providers (TSP) – Qualified
investment volume at the customer’s facility. TSPs offer the technology solutions and are
responsible for the planning, installation, operation
The main actors in the open market platform and maintenance of the equipment, and in some
model are: cases, a simplified measurement and verification.
• Utility - Based on a regulator-approved on-bill
tariff, the utility offers to invest in demand-side RE • Facilitators – Independent entities who will offer
and EE projects on behalf of its customers. independent advice to potential IUS customers.

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