Wytham Estate is a first-of-its-kind luxury retirement development in Upper Kenilworth — 49 apartment-style units and 12 mews-style homes arranged around a heritage manor house, with a wellness centre, restaurant, cinema, library and gym serving residents across the estate. Designed for over-65s on a life-rights basis, Wytham was conceived from the ground up as a community where residents don't just live comfortably, but live without having to think about the infrastructure that keeps the estate running.

When Treetops was brought in, load-shedding was at its peak. The brief was clear: design a solar and battery system that kept the entire estate powered during outages, with zero compromise on either the infrastructure residents depend on or the aesthetics of a premium, architecturally coherent development.

Most commercial solar briefs start with the electricity bill. Wytham's didn't. With load-shedding disrupting daily life across Cape Town and residents who couldn't afford to be left without lifts, medical alert systems, fire safety or secure access, the primary requirement was resilience. Every unit needed continuous backup for the equipment that actually matters when the grid fails. Every common-area service — manor house operations, lifts, fire safety, security infrastructure — needed to stay live. And every part of the system needed to be sized to cover the estate's electricity consumption during normal grid conditions, so that resilience came with real monthly savings rather than as a standalone cost.

We were involved from the earliest design stage, which is unusual for a project of this scale and exactly the kind of engagement these projects need. Retrofitting a resilience strategy into a finished building always produces compromises. Designing it in from the start produces a system that actually works.

The central engineering decision on Wytham was how to structure backup power for the residential units themselves. With 61 homes on the estate and residents whose health and safety could depend on continuous power, a single point of failure wasn't acceptable.

The solution we proposed — and that the estate agreed to — was two completely separate backup circuits in every unit:

• A "nice-to-have" backup circuit covering general convenience loads — lighting, TVs, appliances that residents use daily but can live without briefly in an emergency. This circuit is powered by the Treetops solar and battery system.
• A critical backup circuit covering the loads that cannot fail under any circumstances — medical alert systems, essential lighting, emergency communications. This circuit is powered by the same solar and battery system, but with a completely separate backup generator that kicks in automatically if the Treetops system is ever offline for maintenance or faults.

That two-stage architecture gives residents the safety-critical protection they need without the solar and battery system having to carry the full weight of life-safety responsibility on its own. It's belt-and-braces design, and it's the right approach for a retirement environment where the margin for error is zero.

Common areas — lifts, fire safety, manor house, security — are powered on the same principle: full solar and battery coverage, with generator backup on the safety-critical circuits.

• 134kWp of solar panels
• 400kWh of Freedom Won lithium battery storage
• 150kVA inverter capacity

Freedom Won batteries were specified deliberately. In a retirement estate where the system needs to operate reliably for decades, with residents who shouldn't have to think about roof-top maintenance, we wanted batteries with a long warranty, local manufacture, and proven high-cycle performance. Freedom Won meet all three, and the battery room was designed and commissioned with capacity and airflow that match their long-term operating requirements.

The inverter capacity was sized with future expansion in mind, so the estate has headroom for additional panels or storage if resident consumption patterns shift over the years.

Wytham is an award-winning architectural development. The solar installation had to disappear into the estate visually, not announce itself from every angle. Panel placement was coordinated with the architects, roof lines were respected, and the battery installation — which is substantial at 400kWh — was completed in the limited technical space available on the estate without compromising the flow of the grounds or the manor house aesthetic. That kind of design coordination is what separates a working solar system from a good-looking working solar system, and on Wytham both were non-negotiable.

Wytham Estate produces over 180,000 kWh of free electricity and saves over R400,000 every year, while providing reliable backup for common-area infrastructure, resident units and critical services across the estate.

The system has operated continuously since commissioning in 2023. Residents don't notice it. Which is exactly the point.

Watch the full interview with Craig on the Wytham installation: YouTube link

Wytham sits in a distinctive category within our commercial portfolio. It's not an office block with a simple daytime load. It's not a factory with predictable machinery. It's a community of over-65s whose safety and comfort depend on infrastructure they shouldn't have to think about — and whose body corporate, management team and residents all have different priorities that a good system needs to serve simultaneously.

Projects like Wytham are the reason retirement complexes and estates call us before anyone else. Systems in this environment have to deliver measurable savings, provide genuinely reliable backup for everything from lifts to medical equipment, integrate invisibly into premium architecture, and operate quietly for the next two decades. Getting one of those four things right is straightforward. Getting all four right at once is where real engineering has to take over.

Planning a solar and battery installation for a retirement estate, residential complex or body corporate? We've designed systems across the Western Cape that meet exactly this brief — resilient, elegant, and built to last.