South African Real Estate Investment Trust (REIT), Growthpoint Properties (JSE: GRT), has acquired a 30% stake in the operational Boston Hydroelectric plant, a new R390 million development with an operational lifetime of over 40 years, by independent power producer Serengeti Energy within the Lesotho Highlands Water Scheme near Clarens. South Africa’s newest hydroelectric plant was certified for commercial operations by Eskom on Friday (17 October 2025) and has already started adding renewable energy to the national grid.
As early as 2023, Growthpoint secured exclusive access to approximately 30GWh of renewable electricity generated by the plant annually, through its landmark 195GWh power purchase agreement (PPA) with licensed energy trader Etana Energy. Boston Hydro is the first project to come online in a mix of cost-saving, certified zero-carbon hydro, wind and solar electricity generation projects powering the PPA. The renewable electricity from Boston Hydro has been matched with 23 Growthpoint buildings, including 10 in Sandton Central and three in Cape Town.
Strategic investment advances energy security
Growthpoint’s 30% stake in Boston Hydro continues its investment in renewable electricity sources and furthers its green energy transition, which began more than a decade ago. The property group took its first steps into rooftop solar generation in 2011.
Since its first installation, the property group has invested more than R1 billion in solar energy locally, grown one of South Africa’s largest Small Scale Embedded Generator (SSEG) renewable energy fleets, and linked it to transparent certification frameworks. Growthpoint owns a fleet of 80 rooftop plants across its portfolio, delivering 61.2MWp of capacity and generates a significant amount of clean electricity annually. A further 7MWp of solar installations are in the pipeline for commissioning by mid-2026.
The company now operates and procures one of South Africa’s most diversified private renewable energy portfolios, combining solar and hydro generation, with wind soon set to join its renewable energy mix as part of the PPA. When its rooftop solar and PPA with Etana Energy are fully operational, approximately 40% of the property developer’s total electricity demand will be supplied from renewable energy.
Additionally, Growthpoint verifies its renewable energy by registering the electricity generated on the International Renewable Energy Certificate (I-REC) registry via Fuel Switch, Africa’s first blockchain-enabled REC exchange.
Driving this acquisition is Growthpoint’s e-co₂ wheeled renewable energy initiative (which is short for electricity minus carbon dioxide and pronounced “eco two”).
The e-co₂ initiative offers wheeled renewable electricity directly to 10 flagship office buildings in Sandton and their tenants, with the first electrons coming from the operational Boston Hydro over the national grid, promising stable and cost-competitive energy for Growthpoint tenants with a zero-carbon footprint and certified with tradable digital RECS.
For the first time in South Africa, businesses can cut their Scope 2 emissions from purchased electricity in select Growthpoint buildings. So, they can save money, advance their sustainability goals and report certified emissions reductions aligned with evolving IFRS sustainability reporting standards.
The launch of e-co2 positions Growthpoint as South Africa’s first provider of a commercial-scale wheeled renewable energy solution for multi-tenanted commercial properties, with building-level certification and benefits that are made available to tenants in a verified, auditable format.
Estienne de Klerk, SA CEO of Growthpoint Properties, says: “We are incredibly proud of this innovative initiative, made possible by a visionary team, dedicated partners such as Etana Energy, Serengeti Energy, Fuel Switch and many passionate and talented people over a number of years. It not only benefits the immediate occupants of Growthpoint’s properties but helps to create a brighter and more sustainable future for South Africa.”
Evan Rice, CEO, of Etana Energy, says: “Growthpoint and Etana’s clean energy partnership is accelerating renewable energy in a way that works for business, the country and the planet. Together, we’re making clean electricity accessible through the grid, securing long-term take-off for IPPs and enabling businesses to cut costs and carbon without complexity. It’s a scalable, transparent model for South Africa’s energy future.”
Anton-Louis Olivier, CEO, Serengeti Energy, says: “Boston Hydro brings affordable, baseload renewable power to the grid reliably and around the clock. It’s the product of 15 years of operational experience across Africa. We're proud to be the generation backbone of this ground-breaking clean energy partnership and powering a scalable solution for South African businesses through Growthpoint’s e-co₂.”
