Solar PV on packhouses

This industry brief by GreenCape examines the financial and technical feasibility of installing solar photovoltaic (PV) systems on packhouses in the Western Cape, South Africa. It highlights that the primary value of these systems is the replacement of expensive grid electricity with self-generated power during peak daytime cooling and energy-intensive operations, potentially reducing electricity costs by 15%.

• Solar PV installations on packhouses are particularly effective because they align energy generation with the high cooling and energy demands of packhouses during the day. Additionally, the panels act as insulators by absorbing heat, which further lowers cooling requirements; some installations have reported monthly electricity cost reductions of up to 80%.
• Financial modelling indicates that large solar PV systems (500 kWp) are viable across all tested scenarios, yielding an internal rate of return (IRR) greater than 18%, a net present value between R0.5 million and R4.1 million on an R8.1 million system, and 8–13 years of 'free energy' after payback.
• Small solar PV systems (≤10 kWp) can be financially viable, but their success is highly dependent on financing terms. They show an IRR range of 11–21% and only achieve a positive net present value under favourable loan terms of 10%.
• Case studies demonstrate diverse outcomes: Stellenpak Fruit Packers in Paarl achieved a 15% reduction in electricity costs with a 420 kWp system; Ceres Fruit Growers used a 986 kWp system to reduce annual electricity consumption by 6%; and ArbeidsVreugd Fruit Packers in Villiersdorp estimated a six-year payback for a 450 kWp system, projecting R38 million in savings over 25 years.
• The ability to feed excess electricity back into the grid varies by municipality in the Western Cape. Factors determining feed-in capability include the energy supplier (Eskom or municipality), the voltage connection (low, medium, or high), and the specific municipal rules, regulations, and tariffs.

APA

van Vuuren, P. J. (2016). Solar PV on packhouses. GreenCape. https://greencape.co.za/assets/Uploads/Solar-PV-Industry-Brief-1.pdf

Chicago

van Vuuren, Pieter Janse. Solar PV on packhouses. GreenCape, 2016. https://greencape.co.za/assets/Uploads/Solar-PV-Industry-Brief-1.pdf.

Wikipedia

{{cite report |last1=van Vuuren |first1=Pieter Janse |title=Solar PV on packhouses |publisher=GreenCape |date=2016 |url=https://greencape.co.za/assets/Uploads/Solar-PV-Industry-Brief-1.pdf |access-date=17 August 2026 |via=Climate Insights Directory}}

BibTeX

@techreport{vanvuuren2016solar, author = {van Vuuren, Pieter Janse}, title = {{Solar PV on packhouses}}, institution = {GreenCape}, year = {2016}, url = {https://greencape.co.za/assets/Uploads/Solar-PV-Industry-Brief-1.pdf}, urldate = {2026-08-17}, note = {Indexed by Climate Insights Directory} }