Harnessing the Power of the Cape Sun

Load shedding has become an unwelcome guest in the lives of many South Africans, prompting a surge in interest in solar power solutions. Cape Town residents, in particular, are turning to rooftop photovoltaic (PV) systems to combat the challenges posed by erratic power supply. As load shedding looms and the possibility of worsening power shortages persists, solar power offers an attractive and practical means of achieving energy independence. Let's delve into the key aspects of going solar in Cape Town.

Understanding the Benefits of Rooftop PV Systems

The City of Cape Town acknowledges the growing demand for solar solutions and has offered valuable guidance to residents seeking to embrace solar power. With power reliability at stake and frequent load shedding events, solar PV systems have emerged as a promising household solution. These systems allow homeowners to generate their own electricity, reducing dependence on the grid and shielding themselves from power outages.

Exploring the Three Types of Solar Systems

Grid-Tied Solar PV System:
This system is directly connected to the electricity grid, with the option to export excess energy or not. It enables homeowners to use solar power while still having access to grid electricity.

Grid-Tied Hybrid Solar PV System:
These systems offer the ability to disconnect from the grid and switch to stored energy in batteries during power outages. Essential loads can be powered independently, ensuring uninterrupted electricity supply.

Standby Solar PV System:
This system supplies power either from solar panels or the grid but never simultaneously. Although an option, this configuration is discouraged by the City of Cape Town due to potential safety risks and complications.

The City's Checklist for Safe and Legal Solar Installations

Verification:
Choose installers with substantial experience and references in solar PV installations.
Verify if the installer is accredited under quality assurance programs like the PV Green Card or P4 Platform.

Proof of Competence:
Request proof of electrical Certificates of Compliance (CoCs) and/or engineer sign-offs for previous installations. Ensure the installer is registered and employs qualified staff with up-to-date credentials.

Inverter Approval:
Check if the proposed inverter is on the City's approved list.

Authorisation:
Obtain written authorisation from the City before installing any type of solar PV system.

Structural Assessment:
Ensure your roof can support the weight and wind load of the PV panels.

Inverter Selection:
Select an approved inverter from the City's list.

PV Panel Standards:
Ensure compliance with SANS/IEC standards for solar panels.

Battery Storage Safety:
Store batteries in a properly racked, well-ventilated room.

Circuit Breakers:
Use specialised circuit breakers for DC currents from the PV panels.

Warranties and Manuals:
Obtain warranties and manuals for the installation and its components.

Recourse for Poor Work:
Consider an independent inspection from organisations like the Electrical Approved Inspection Authority of Southern Africa (EAIASA).