Stage Zero’s Gilbert 48V hybrid PV inverter series, including the 3kVA, 5kVA, 6kVA and 8kVA grid-tied models, has been added to the City of Cape Town’s Approved Photovoltaic (PV) Inverter List, marking an important compliance milestone for the company’s managed solar and backup offering.
Although maintained by the City of Cape Town, the Approved Photovoltaic (PV) Inverter List is widely referenced in South African SSEG compliance processes as a practical baseline for inverter compliance. It helps customers, installers and technical teams identify inverter equipment that has been verified against recognised grid-connection requirements, including NRS 097-2-1, for safe connection to the electricity network.
For Stage Zero, the approval reflects a broader investment in building affordable, reliable, and technically compliant solar and backup solutions in South Africa’s evolving electricity environment.
“Solar decisions are no longer only about panels, batteries, and backup. Customers also need confidence that the system installed at their home or business is safe, compliant, and supported over time,” says Peter Westerman, chief operations officer at Stage Zero. “The addition of the Gilbert Series to the City of Cape Town’s approved PV inverter list reflects the investment we have made in product development, testing, regulatory readiness, and long-term customer confidence.”
The Gilbert Series forms part of Stage Zero’s locally developed technology capability, supported by the company’s in-house research and development function. This gives the company greater control over how its systems are designed and improved for South African conditions, including rising electricity costs, grid instability, customer affordability, monitoring requirements, and the need for reliable after-sales support.
The approval also points to the growing maturity of South Africa’s solar sector. As more households and businesses invest in solar and battery systems, approved equipment is becoming a customer-protection issue as much as a technical requirement. Incorrectly specified or non-compliant systems can create safety, registration, and network concerns, especially in municipalities with established embedded-generation processes.
“Getting equipment onto the City’s approved list requires time, resources, and a clear commitment to meeting the standards expected of safe, grid-tied PV installations. This is part of building solutions that are not only financially accessible, but appropriate for the realities South African customers face every day,” adds Westerman.
Stage Zero’s subscription-based model is designed to reduce the barrier of high upfront capital costs by allowing customers to access solar and backup systems through a monthly fee. The company says its approach is built around reducing electricity costs from the start, while continuing to monitor and support system performance over time.
For Cape Town customers, the inclusion of the Gilbert Series means Stage Zero systems can be installed with confidence that the inverter used is recognised within the City’s framework. Stage Zero also supports customers throughout the broader process, including guidance on compliance requirements and, where applicable, small-scale embedded generation registration.
“As electricity becomes more expensive and harder to plan around, customers need more than a system that works on day one. They need a solution that is compliant, monitored, supported, and built around long-term performance,” concludes Westerman .