The Solar photovoltaic hybrid grid-tied system with BESS at Hartenbos

This is the solar photovoltaic hybrid grid-tied system with battery energy storage system (BESS) at the Hartenbos regional wastewater treatment works.

Project Snapshot

• Size of site: 3.5-hectare site
• Solar generation: 2.5 MVA from 4,400 PV panels and mounting structures
• Inverter station capacity: 3.2 MVA
• Battery Energy Storage System (BESS): 4,512 kWh
• New substation: Includes 11kV switchgear and all associated control systems
• Estimated workforce during construction: 138 persons (professional team, main contractor, and subcontractors)
• Construction cost: R112 million (incl. VAT)
• Contract period: 18 months
• Due completion date: 28 September 2025