Electrical Design Of 2 X 5mw Batteries On Tonga | Solar Farms And Storage Engineering | Projects | Enhar
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Electrical design of 2 x 5MW batteries on Tonga

Electrical design of 2 x 5MW batteries on Tonga
  • Project: Designing 2 x BESS systems for island grid

Akuo Energy is constructing and operating two battery BESS facilities located on the Pacific Island of Tonga.  Enhar was engaged by Akuo to undertake engineering review against Australian Standards and provide electrical engineering services.

This project is funded through the TREP project which is co-financed through ADB, GCF fund and DFAT along with contributions from government of Tonga and TPL.

The project involves two BESS facilities which provide grid stabilising and arbitrage services for high solar penetration on the island grid.  These are called 'Tonga 1' and 'Tonga 2'

Akuo won the call for tender launched by the Asian Development Bank and Tonga Power Limited for its 17.4MWh / 5MW Tonga 2 project. plus the first battery storage project in the archipelago - Tonga 1, which has a capacity of 5 MWh/10 MW and aims at improving grid stability. 

Enhars Scope:

  • Review of Electrical Design against Australian Standards
  • Earthing Design
  • Cable tray and cable ladder design
  • Overall schematic 
  • Lock out tag out design
  • Bill of Materials for earthing, cables, cable trays, cable ladders

Project Details:

  • Tonga 1:  10MWh/5MW BESS project in Tonga
  • Tonga 2:  17.4MWh/5MW BESS connected to a solar farm in Tonga

Project Challenges:

  • Compliance with Australian Standards in a Pacific Island environment
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