From 15 April 2026, updated electrical safety rules come into effect across the UK, changing how modern home systems are installed and maintained.
The building regulation updates affect solar batteries, electric vehicle chargers, and smart home wiring, including how data and electricity interact in the home.
Homeowners, renovators, and builders need to understand these changes in detail to ensure their homes meet the new safety requirements.
Article continues below1. Solar batteries
The new rules introduce clear requirements for solar battery systems, often paired with solar panels:
- Batteries cannot be installed in lofts, narrow cupboards, or escape routes. They must be in accessible, ventilated areas.
- Battery enclosures must allow proper airflow to prevent heat buildup, particularly for lithium-ion systems.
- Batteries must have clear disconnection points to allow safe isolation during maintenance.
- Spacing, enclosure materials, and installation methods must meet stricter fire safety standards.
2. EV chargers
Updated requirements for electric vehicle chargers include:
- Chargers must have proper circuit protection to prevent overload or short circuits.
- Chargers must be correctly earthed and include disconnection points for safe maintenance.
- Chargers must be installed in accessible locations without creating obstruction or hazards.
3. Power over ethernet and home data wiring
The new rules have stricter guidance over rewiring and the safe integration of power and data in modern homes:
- Data cables carrying electricity (PoE) must be rated to handle the electrical load safely without overheating.
- Data cables must be separated from standard mains circuits to prevent interference and electrical hazards.
- Smart home systems, security networks, and LED lighting circuits must follow these wiring guidelines to operate safely.
4. Functional earthing for home electronics
Functional earthing rules clarify the difference between earthing for safety and earthing for equipment performance:
- Electronics and networked devices such as computers, media servers, and smart hubs must have functional earthing arrangements.
- Proper earthing reduces interference and ensures reliable operation of home electronics.
5. Energy efficiency in electrical installations
New requirements encourage energy-efficient home electrical systems:
- Circuits should be designed to minimise electricity loss.
- Wiring layouts should consider energy efficiency alongside safety.
- Smart energy management and monitoring systems may be incorporated to improve efficiency.
From 15 April 2026, all new or upgraded home electrical systems must follow these updated safety and installation rules. Existing systems already in place will not be forced to make the changes, but will no longer be to regulation.
Solar batteries, EV chargers, smart home wiring, functional earthing, and energy-efficient layouts now have specific requirements for placement, ventilation, isolation, and performance.
Homeowners and renovators must plan installations according to these rules to ensure safe, compliant, and modern energy systems.
