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This industry brief by GreenCape examines the financial viability of using battery energy storage systems (BESS) for tariff arbitrage in the Western Cape, South Africa. It focuses on leveraging time-of-use (TOU) tariffs to reduce energy costs by charging batteries during off-peak periods and discharging during peak periods, particularly as the decline in loadshedding has left many existing BESS installations underutilised.

This case study describes the implementation of a hybrid solar PV and battery energy storage system (BESS) at the Hartenbos wastewater treatment works (WWTW) in the Western Cape. The project aims to ensure continuous operation during loadshedding, reduce municipal peak demand, and lower reliance on diesel backup.

This industry brief by GreenCape reviews water and sanitation by-laws across municipalities in the Western Cape, South Africa. It evaluates the completeness and clarity of these local regulations against a 2005 model by-law, highlighting the implications for businesses—particularly water-intensive industries—regarding fees, audits, industrial effluent, and alternative water sources.

This report by GreenCape evaluates the financial and operational feasibility of installing solar photovoltaic (PV) systems on agricultural packhouses, using a modelled apple packhouse to demonstrate the business case. It highlights that the primary value of these systems comes from replacing expensive grid electricity during peak daytime demand—driven by cooling and packing activities—rather than selling excess power back to the grid. The analysis concludes that while large-scale systems are consistently profitable, smaller installations require favorable financing to be viable.