CPD: Solar PV safety in social housing

Solar photovoltaic (PV) systems have moved rapidly from niche technology to mainstream building infrastructure. Once associated mainly with eco-homes and demonstration projects, PV is now appearing across local authority housing stock, retirement schemes, extra care developments and large-scale housing association portfolios.

For providers operating in the social housing sector, the drivers are clear: decarbonisation targets, tenant affordability pressures, improved EPC ratings, funding incentives and the need for long-term asset resilience.

However, as adoption accelerates, a more difficult question is emerging. Are housing providers treating PV systems as strategic building assets with defined lifecycle responsibilities, or as bolt-on technologies installed to meet short-term sustainability ambitions?

In today’s regulatory environment, poor oversight of electrical systems is no longer simply a technical failure. Increasingly, it is viewed as a governance failure, with reputational and financial consequences that can extend far beyond the roof itself.

Photovoltaics began life in the mid-20th century, originally developed for satellites and specialist scientific applications. Early systems were expensive and inefficient, but steady advances in silicon cell design, manufacturing scale and global supply chains led to a dramatic fall in cost per kilowatt. Over time, PV moved from experimental deployment to widespread commercial use.

The UK was relatively slow to adopt compared with sunnier European nations, but policy mechanisms such as the Feed-in Tariff (FiT), operating between 2010 and 2019, sparked mass installation across domestic and social housing rooftops.

FiT was later replaced by the Smart Export Guarantee (SEG), reflecting a transition away from subsidy-driven expansion and towards self-consumption and export-based incentives. By the early 2020s, solar had become one of the cheapest forms of electricity generation available.

Today, PV is no longer an “alternative” technology. It is infrastructure. Increasingly, it is being installed on buildings that house society’s most vulnerable residents, where safety, reliability and compliance are paramount.

The technical landscape has also evolved rapidly. In the social housing context, a “solar installation” may now involve far more than roof-mounted modules. Hybrid systems increasingly combine PV panels with hybrid inverters and battery energy storage systems (BESS), alongside export limitation schemes, monitoring platforms and, in some cases, backup supply configurations.

This matters because PV is no longer simply rooftop generation. It is embedded electrical infrastructure, integrated into building services and distribution networks, introducing additional risks and responsibilities. Hybrid systems can improve tenant affordability and resilience, but they also bring new considerations around fire safety, electrical isolation, ventilation, grid compliance and long-term maintenance, asset management data and associated additional replacement costs.

One of the most misunderstood areas in housing is the distinction between legal duties and industry standards that become enforceable through contract, insurer expectation, or regulatory scrutiny. For PV and BESS systems, mandatory duties include the requirement to maintain electrical systems safely under the Electricity at Work Regulations 1989. This duty is mandatory: electrical systems must be constructed and maintained so as to prevent danger.

Similarly, roof access and inspection activities fall under the Work at Height Regulations 2005, also mandatory, requiring safe planning, competent personnel, and appropriate equipment. Note that the most expensive part of solar PV installation isn’t the panel – it’s the scaffold access.

Fire safety obligations arise under the Regulatory Reform (Fire Safety) Order 2005 for common parts and non-domestic areas, where PV-associated equipment may form part of the fire risk assessment landscape.

Grid compliance is also fundamental. Connection of generation equipment to the distribution network must be notified and approved under ENA Engineering Recommendations G98 and G99. These requirements are often overlooked in legacy installations or during later system alterations, but non-compliance can, in principle, lead to disconnection or enforcement action.

Alongside these legal duties sit the benchmarks that competent contractors, insurers and building control bodies will expect. BS 7671 (the IET Wiring Regulations) remains central to safe installation and inspection. BS EN 62446 is an advisory standard that provides structured frameworks for commissioning, documentation, inspection and periodic testing of PV systems.

The IET Codes of Practice for grid-connected solar PV and electrical energy storage systems provide practical guidance on safe operation and maintenance regimes. PAS 63100:2024 offers best-practice guidance on fire protection for domestic battery storage, while MCS standards such as MIS 3002 and MIS 3012 increasingly form contractual baselines for installation quality and handover documentation.

In practice, these standards are not academic. They form the basis of what a housing provider may need to evidence in the event of an incident, audit, insurer query or regulatory engagement.

Housing providers are now asking uncomfortable, but essential questions. Where are our PV systems? What roofs are they installed on? Where are the commissioning certificates? Who maintains the inverters? Do we have emergency isolation information? Could we demonstrate compliance evidence quickly if challenged?

This is where PV intersects with the emerging “golden thread” principle: the duty to maintain accurate, accessible, up-to-date building safety information. While golden thread duties apply directly to higher-risk buildings under the Building Safety Act 2022, the direction of travel is clear. Good records are no longer “nice to have”, they are governance evidence.

A PV installation without traceable documentation is not simply untidy. It is a compliance vulnerability.

For social landlords, one of the greatest risks with rooftop solar is not technological failure, but asset misalignment. PV panels are typically marketed as 25-year assets, with long-term performance warranties. Inverters may last 10-15 years. Battery systems often require replacement or significant intervention within similar timescales.

But the roof beneath them may tell a different story.

Many providers installed PV rapidly during the FiT era, often on buildings with ageing roof coverings, limited remaining waterproofing life, unclear refurbishment plans and incomplete as-built documentation. This creates an extremely common scenario: the PV array has 12 years of life remaining, but the roof beneath it needs replacement now.

At that point, solar becomes less of an energy project and more of an access and lifecycle cost problem. Scaffolding, edge protection, temporary works and resident safety controls routinely outweigh the cost of the PV modules themselves.

The correct asset management mindset is therefore that the roof and the PV system are one combined engineered asset. Planned separately, providers risk premature replacement of one component, wasted access costs, repeated scaffold mobilisation, disruption to residents, and increased compliance exposure.

Lifecycle alignment is one of the simplest interventions that can save millions. Asset teams should be asking: what was the age of the roof at the time of PV installation? What is the remaining service life? Are PV arrays integrated into roof renewal programmes? Do we have removal-and-reinstatement specifications ready? Is the system documented well enough to be safely altered?

Alterations are not neutral. Inverter replacement, adding battery storage, increasing array capacity, or changing export characteristics may trigger fresh requirements under G98/G99, updated commissioning documentation, revised fire risk assessment inputs, and renewed inspection evidence. Poorly planned lifecycle intervention can therefore create accidental compliance breaches.

The most significant shift is that PV compliance is no longer only about engineering. It is about organisational control.

The Regulator of Social Housing (RSH) oversees registered providers’ performance in governance, financial viability, consumer standards, and safety compliance. The Social Housing (Regulation) Act 2023 has strengthened consumer regulation and expanded the regulator’s visibility and enforcement reach.

Regulatory judgements often reveal only the visible tip of wider governance, financial and reputational impacts.

Under Housing and Regeneration Act powers, the regulator can issue enforcement notices, impose financial penalties, require compensation, appoint new management, and publish regulatory judgements. These outcomes are not private. They are public, and they land directly in the sector’s “name and shame” ecosystem.

While the RSH has not yet issued high-profile judgements solely about solar PV systems, it has taken extensive action on electrical safety compliance failures, including large backlogs of overdue EICRs and communal inspection deficits. PV systems form part of the fixed electrical installation. As hybrid systems proliferate, scrutiny will inevitably extend into this space.

A key governance risk is the impact on ratings. A provider’s hard-won G1/V1 (Governance/Financial viability) rating is not simply a badge of honour. It underpins lender confidence, borrowing costs, insurance positioning, partnership opportunities, and sector credibility.

Regulatory downgrades can trigger higher financing costs, insurer exclusions, operational remediation burdens, and reputational damage[i] that can take years to recover from.

Solar PV has enormous potential in social housing. It can reduce tenant costs, support decarbonisation, improve resilience and align with ESG expectations. However, with that potential comes responsibility.

The era of informal retrofit is closing. The era of regulated infrastructure is here. The question for housing leaders is no longer: “Can we install solar?” It is: “Can we prove we are managing it safely, competently, and transparently for the next 25 years?”

Because the regulator will not be asking about carbon. They will be asking about control. Remember that net zero is not the finish line – compliance is.

Simon Berry FCIOB MIFireE is the technical standards and specification manager for Anchor Housing. He delivers courses on solar PV systems for CIOB Academy.