Contents
Consumer units, BS 7671 18th edition, Part P compliance, and most specified electrical products for London residential rewire in 2025
Most specified consumer units, MCBs, RCDs, RCBO protection, Part P Building Regulations notification, BS 7671:2018 Amendment 2 compliance, and electrical installation products for London residential rewire in 2025: CONSUMER UNIT — THE CENTRAL ELECTRICAL COMPONENT IN A LONDON RESIDENTIAL REWIRE IN 2025 — MOST INSTALLED CONSUMER UNIT IN LONDON RESIDENTIAL RENOVATION IN 2025: HAGER VML916CVPD 17TH/18TH EDITION DUAL RCD CONSUMER UNIT (THE MOST INSTALLED CONSUMER UNIT IN LONDON RESIDENTIAL REWIRE IN 2025 — HAGER LOADCENTRE VML916CVPD — SPLIT LOAD CONSUMER UNIT WITH MAIN SWITCH + TWO RCD BANKS (THE SPLIT LOAD DESIGN BEING MOST SPECIFIED IN LONDON RESIDENTIAL IN 2025 BECAUSE IF ONE RCD TRIPS DUE TO A FAULT ON ONE OF ITS CIRCUITS ONLY HALF THE HOUSE LOSES POWER — THE MOST ELECTRICALLY PRUDENT APPROACH IN LONDON RESIDENTIAL IN 2025) — 16-WAY (MOST COMMON CONSUMER UNIT SIZE FOR A STANDARD LONDON 3-4 BEDROOM HOUSE REWIRE IN 2025 — TYPICALLY ACCOMMODATING 12-14 FINAL CIRCUITS: 2-3 RING MAIN SOCKET CIRCUITS + 2-3 LIGHTING CIRCUITS + 1 COOKER CIRCUIT + 1 SHOWER CIRCUIT + 1 EV CHARGER CIRCUIT + 1 DISHWASHER CIRCUIT + 1 FRIDGE/FREEZER CIRCUIT + 1 SPARE) — METAL CLAD (METAL ENCLOSURE MANDATORY UNDER BS 7671:2018 FOR ALL NEW CONSUMER UNIT INSTALLATIONS IN DOMESTIC PROPERTIES IN 2025 — STEEL ENCLOSURE PROVIDES FIRE CONTAINMENT — MOST INSTALLED FINISH IN LONDON RESIDENTIAL IN 2025: METAL CLAD GREY)); SECOND MOST INSTALLED CONSUMER UNIT IN LONDON RESIDENTIAL RENOVATION IN 2025: WYLEX NHSM17SSLRB 18TH EDITION CONSUMER UNIT (THE SECOND MOST INSTALLED CONSUMER UNIT IN LONDON RESIDENTIAL REWIRE IN 2025 — WYLEX (PART OF EATON) — MOST INSTALLED AS ALTERNATIVE TO HAGER WHERE ELECTRICIAN PREFERS WYLEX); BS 7671:2018 AMENDMENT 2:2022 KEY REQUIREMENTS FOR LONDON RESIDENTIAL IN 2025: METAL CONSUMER UNIT (MANDATORY — AS ABOVE); ARC FAULT DETECTION DEVICES (AFDD — INCREASINGLY SPECIFIED IN LONDON RESIDENTIAL NEW-BUILD IN 2025 — NOT YET MANDATORY IN EXISTING DWELLINGS IN ALL CIRCUITS BUT MOST COMMONLY INSTALLED ON BEDROOM CIRCUITS IN NEW LONDON RESIDENTIAL RENOVATION WHERE THE DESIGNER FOLLOWS BEST PRACTICE): MOST INSTALLED AFDD IN LONDON RESIDENTIAL NEW-BUILD AND PREMIUM RENOVATION IN 2025: HAGER AFDD (HAGER ADA-SERIES AFDD — MOST INSTALLED AFDD IN LONDON RESIDENTIAL PREMIUM RENOVATION AND NEW-BUILD IN 2025 — DETECTS ARC FAULTS — MOST COMMONLY INSTALLED ON BEDROOM CIRCUITS SUPPLYING FIXED WIRING WHERE FAULT ARCING IS A SIGNIFICANT FIRE RISK); RCBO PROTECTION (RESIDUAL CURRENT CIRCUIT BREAKER WITH OVERCURRENT PROTECTION — PROVIDES BOTH RCD PROTECTION AND OVERCURRENT PROTECTION IN A SINGLE DEVICE — INCREASINGLY SPECIFIED IN LONDON RESIDENTIAL IN 2025 AS AN ALTERNATIVE TO THE TRADITIONAL DUAL-RCD SPLIT-LOAD CONSUMER UNIT — PROVIDES INDIVIDUAL CIRCUIT-LEVEL RCD PROTECTION): MOST INSTALLED RCBO IN LONDON RESIDENTIAL RENOVATION IN 2025: HAGER MTN116 RCBO (THE MOST INSTALLED RCBO IN LONDON RESIDENTIAL RENOVATION IN 2025 — HAGER MTN SERIES — 30mA TYPE A SENSITIVITY); CABLE — MOST INSTALLED CABLE IN LONDON RESIDENTIAL REWIRE IN 2025: PRYSMIAN 6242Y TWIN AND EARTH GREY SHEATHED CABLE (THE MOST INSTALLED FIXED WIRING CABLE IN LONDON RESIDENTIAL REWIRE IN 2025 — PRYSMIAN 6242Y — TWIN CONDUCTOR (BROWN LIVE + BLUE NEUTRAL) + BARE EARTH — MOST INSTALLED SIZES IN LONDON RESIDENTIAL REWIRE IN 2025: 2.5mm² (RING MAIN SOCKET CIRCUITS — MOST INSTALLED SIZE IN LONDON RESIDENTIAL REWIRE IN 2025) + 1.5mm² (LIGHTING CIRCUITS) + 6.0mm² (SHOWER AND COOKER CIRCUITS) + 10.0mm² (EV CHARGER CIRCUIT FROM CONSUMER UNIT TO GARAGE OR DRIVEWAY CHARGING POINT)); PART P BUILDING REGULATIONS NOTIFICATION (MANDATORY FOR NOTIFIABLE ELECTRICAL WORK IN LONDON RESIDENTIAL IN 2025 — MOST COMMON NOTIFIABLE WORKS IN LONDON RESIDENTIAL IN 2025: FULL REWIRE; NEW CONSUMER UNIT INSTALLATION; NEW CIRCUITS IN BATHROOMS, BEDROOMS, AND KITCHENS; EV CHARGER INSTALLATION — MOST COMMONLY NOTIFIED VIA A PART P REGISTERED COMPETENT PERSON SCHEME SUCH AS NICEIC OR NAPIT — THE REGISTERED ELECTRICIAN SELF-CERTIFIES THE WORK AND NOTIFIES THE LOCAL AUTHORITY BUILDING CONTROL ON BEHALF OF THE HOMEOWNER — MOST INSTALLED COMPETENT PERSON SCHEME IN LONDON RESIDENTIAL ELECTRICAL WORK IN 2025: NICEIC (NATIONAL INSPECTION COUNCIL FOR ELECTRICAL INSTALLATION CONTRACTING — THE MOST REGISTERED ELECTRICAL COMPETENT PERSON SCHEME IN LONDON RESIDENTIAL IN 2025)).
EV chargers, solar PV, home battery storage, and London residential electrical costs in 2025
Most specified EV home charger products, solar PV inverters, home battery storage systems, and typical London residential electrical upgrade costs in 2025: EV HOME CHARGERS — MOST INSTALLED IN LONDON RESIDENTIAL IN 2025: MOST INSTALLED EV HOME CHARGER IN LONDON RESIDENTIAL IN 2025: PODPOINT SOLO 3 (THE MOST INSTALLED EV HOME CHARGER IN LONDON RESIDENTIAL IN 2025 — POD POINT SOLO 3 — 7KW (32A SINGLE-PHASE — THE MOST INSTALLED EV CHARGER OUTPUT IN LONDON RESIDENTIAL IN 2025 — CHARGES MOST FULL-SIZE ELECTRIC CARS IN 8-10 HOURS OVERNIGHT) — SMART CHARGING (APP-CONTROLLED SCHEDULING TO CHARGE AT OFF-PEAK ELECTRICITY TARIFF TIMES — THE MOST IMPORTANT SMART CHARGER FEATURE IN LONDON RESIDENTIAL IN 2025 GIVEN THE AVAILABILITY OF TIME-OF-USE TARIFFS SUCH AS OCTOPUS GO AND INTELLIGENT OCTOPUS IN LONDON IN 2025) — TETHERED (CABLE PERMANENTLY ATTACHED TO THE CHARGER UNIT — THE MOST INSTALLED CHARGER TYPE IN LONDON RESIDENTIAL IN 2025 — MOST CONVENIENT AS NO NEED TO RETRIEVE CABLE EACH TIME) — MOST INSTALLED COLOUR IN LONDON RESIDENTIAL IN 2025: WHITE); SECOND MOST INSTALLED EV CHARGER IN LONDON RESIDENTIAL IN 2025: OHME HOME PRO (THE SECOND MOST INSTALLED EV CHARGER IN LONDON RESIDENTIAL IN 2025 — OHME HOME PRO 7.4KW — INTEGRATES WITH VEHICLE STATE OF CHARGE (SOC) VIA SMART API — MOST COMMONLY SPECIFIED FOR LONDON HOMEOWNERS ON OCTOPUS INTELLIGENT OCTOPUS TARIFF IN 2025 — OHME INTELLIGENT CHARGING INTEGRATES WITH OCTOPUS INTELLIGENT TO AUTOMATICALLY CHARGE AT THE CHEAPEST AVAILABLE TIMES); SOLAR PV — MOST INSTALLED IN LONDON RESIDENTIAL IN 2025: MOST INSTALLED SOLAR PV PANEL IN LONDON RESIDENTIAL NEW-BUILD AND RENOVATION IN 2025: LONGI SOLAR HIMO6 370W MONOCRYSTALLINE (THE MOST INSTALLED SOLAR PV PANEL IN LONDON RESIDENTIAL IN 2025 — 370W MONOCRYSTALLINE HALF-CUT CELL — MOST COMMON INSTALLATION SIZE IN LONDON RESIDENTIAL IN 2025: 4KWP SYSTEM (10-12 × 370-400W PANELS — MOST COMMON SIZE FOR A LONDON 3-4 BEDROOM HOUSE WITH SOUTH OR SOUTH-WEST FACING ROOF — GENERATES APPROXIMATELY 3,200-3,600 KWH PER YEAR IN LONDON IN 2025); MOST INSTALLED SOLAR PV INVERTER IN LONDON RESIDENTIAL IN 2025: SOLAREDGE SINGLE-PHASE INVERTER WITH OPTIMISERS (THE MOST INSTALLED SOLAR PV INVERTER SYSTEM IN LONDON RESIDENTIAL IN 2025 — SOLAREDGE SE3000H TO SE5000H — WITH SOLAREDGE P300 POWER OPTIMISERS ON EACH PANEL — MOST INSTALLED BECAUSE POWER OPTIMISERS MAXIMISE GENERATION FROM EACH PANEL INDEPENDENTLY — MOST IMPORTANT IN LONDON RESIDENTIAL RENOVATION IN 2025 WHERE PARTIAL ROOF SHADING FROM CHIMNEY STACKS OR NEIGHBOURING BUILDINGS IS COMMON AND CAUSES SIGNIFICANT GENERATION LOSS IN STRING INVERTER SYSTEMS WITHOUT OPTIMISERS)); HOME BATTERY STORAGE — MOST INSTALLED IN LONDON RESIDENTIAL IN 2025: MOST INSTALLED HOME BATTERY STORAGE IN LONDON RESIDENTIAL IN 2025: GIVENERGY GIVBATTERY 9.5KWH (THE MOST INSTALLED HOME BATTERY STORAGE UNIT IN LONDON RESIDENTIAL IN 2025 — GIVENERGY GIVBATTERY 9.5KWH LITHIUM IRON PHOSPHATE (LFPO4) BATTERY — MOST COMMONLY INSTALLED WITH A GIVENERGY HYBRID INVERTER — MOST INSTALLED CAPACITY IN LONDON RESIDENTIAL IN 2025: 9.5KWH (MOST COMMON FOR A LONDON 3-4 BEDROOM HOUSEHOLD CONSUMING 4,000-5,000KWH/YEAR IN 2025 — STORES SUFFICIENT SOLAR GENERATION DURING THE DAY TO POWER MOST EVENING CONSUMPTION)); SECOND MOST INSTALLED HOME BATTERY STORAGE IN LONDON RESIDENTIAL IN 2025: TESLA POWERWALL 2 (THE SECOND MOST INSTALLED HOME BATTERY IN LONDON RESIDENTIAL IN 2025 — 13.5KWH USABLE CAPACITY — INTEGRATED INVERTER — MOST SPECIFIED IN LONDON RESIDENTIAL PREMIUM NEW-BUILD IN 2025 WHERE INTEGRATED BATTERY+INVERTER IN A SINGLE UNIT IS PREFERRED AND BUDGET IS HIGHER); LONDON RESIDENTIAL ELECTRICAL COSTS IN 2025: FULL HOUSE REWIRE (3-4 BEDROOM LONDON TERRACED OR SEMI-DETACHED HOUSE — INCLUDING NEW CONSUMER UNIT + ALL CIRCUITS + SOCKETS + SWITCHES + PART P NOTIFICATION) — LONDON RESIDENTIAL IN 2025: £6,000-£12,000; EV CHARGER SUPPLY+FIT (PODPOINT SOLO 3 7KW TETHERED — INCLUDING 10MM² CABLE CONSUMER UNIT TO CHARGE POINT): £600-£1,200; 4KWP SOLAR PV SYSTEM SUPPLY+FIT (LONGI HIMO6 10-12 PANELS + SOLAREDGE INVERTER + OPTIMISERS): £6,000-£10,000; GIVENERGY GIVBATTERY 9.5KWH HOME BATTERY SUPPLY+FIT (WITH HYBRID INVERTER): £4,000-£8,000; CONSUMER UNIT REPLACEMENT (HAGER VML916 OR WYLEX + FULL CIRCUIT TESTING) — LONDON RESIDENTIAL IN 2025: £800-£1,500.
Frequently Asked Questions
What consumer unit is most installed in London residential rewire in 2025, and what are the most specified EV chargers and home battery storage systems?▼
Important Note
This guide is for general information only. Building regulations, planning rules, and legal requirements change regularly and vary by local authority. Always seek professional advice specific to your project and location. RCB Design & Build offers free initial consultations — book your free survey.