Business case for large battery addition to 40MW solar farm

Enhar prepared a feasibility study and financial model for adding a large scale battery to a 40MW solar farm in Victoria. 

Enhar undertook financial modelling of revenue streams including FCAS income for the battery, plus the economics of network charges.   DC-coupled vs AC-coupled scenarios were compared.

The model considered spot price revenue from the solar farm before the addition of a BESS, and the impact on revenues and IRR with a BESS.

Enhars Scope:

• Financial modelling of battery revenue
• Solar farm feasibility on landfill 
• Presentations to the Strategic Leadership Team and Councillors;

Project Details:

• 40MW solar farm project in VIC under development
• Interest in the impact on the business case through addition of a battery
• Bankable anslysis required 

Project Challenges:

• FCAS forecasting uncertainty  - we used Global Roam data for historic FCAS values, plus AEMO data on FCAS revenues
• Changing regulations regarding TUOS charges for batteries
• Complex financial model co-optimising multiple targets
• Simulation of battery behaviour to optimise revenues