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During the last 10 years, several investigations on network failures have been conducted, which brought to the conclusion that the grid failure rate is too high in MV underground line, it is due to the joints, generally seen as a weak point in the network.

This challenge provides contribution to the following SDGs:

  • SDG 9: Industries, innovation and infrastructure. Build resilient infrastructure, promote sustainable industrialization and foster innovation





The main scope of this challenge is to find a new type of medium voltage joint with a different from the current one.

For instance, it is necessary to find solutions for the thermalelectric and mechanical aging of the joints, to contrast phenomena like:

  • Mechanical fatigue;
  • Corrosion;
  • Weight loss;
  • Oxidation;
  • Mechanical resistance loss;
  • Treeing;
  • Partial discharges.



In general, the solution needs to satisfy the following requirements.

Must have:

  • to be at least in a technology development phase (technology readiness level ≥6);
  • to be cost-effective comparing to actual technology;
  • to be composed by a complete kit: joint and termination;
  • to be well-suited for installation is lines using Enel cables as per GSC001 (see attachment);
  • different technology of the one foreseen in GSCC004 (see attachment)
  • to ensure safety of the operator;
  • to use cold shrink technology.


Nice to have:

  • simplicity in the stage of construction and assembly of the joint, minimizing the intervention of the operator in the field.


What can we do to resolve this problem following an Open, Innovative and Sustainable approach? 

All questions related to this challenge should be directed to: adrian.sanchezalonso@enel.com.

Challenge rules

This challenge is dedicated to large enterprises, startups, scaleups and SMEs, incorporated in any country, with a technology and/or solution at commercial level (TRL ≥ 6).

All proposers are invited to read carefully the challenge and the regulation of this challenge, attached below in the Attachments section, before to submit a solution.

By submitting a solution they automatically accept the attached Regulations other than the Terms of Use of this platform.

Explain your proposal in English, attach documents if needed (max 5 files, 25MB total size) and support the idea focusing on the following key drivers:

  • Presentation of the proposal, outline and how the technology works;
  • Development stage (Under lab-scale development / Under development for practical use / Implemented for practical use);
  • R&D capability (if development is still needed);
  • Past record of application for similar purposes (such as technical papers or other documentation for introducing your developed product);
  • Issues expected toward application of this project;
  • Sample testing conditions:
    • available sample quantity;
    • cost;
    • required time.
  • Pilots realized: pilots with type test realized in accredited laboratory (Attach dossier)
  • Maintenance of the equipment:
    • Instrumentation
    • Activities and periodicity;
    • Manipulation skills;
    • Possible legal considerations.
  • Prospect for scaling up;
  • Costs/benefits analysis;
  • Other.


Submissions to this challenge must be received by 11:59 PM (CET) on February 5th

Late submissions will not be considered.

What happens next?

Enel will evaluate the response using the following criteria:

  • Overall scientific and technical merit of the proposed approach;
  • Approach to proof of concept or performance;
  • Potential for proprietary position (i.e., is the technology novel or protectable);
  • Economic potential of the concept;
  • Respondent’s capabilities and related experience;
  • Realism of the proposed plan and cost estimates;
  • Time to market.  


Once suitable proposals will be identified the relevant company/es of the Enel group will reserve the opportunity to sign a contract with one or more than one Supplier regarding the following activities:

  • Type Testing execution;
  • Supply of prototypes of the above mentioned system;
  • Follow up and monitoring of the equipment behavior during a specified time (e.g. 2 years).


GSCC004 rev3

PDF (1.05MB) Download

Regulation - Innovation by vendors new MV joints technology

PDF (0.31MB) Download

GSC001_Rev.05 MV Underground cables

PDF (2.52MB) Download

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