2026 cost guide

Solar panel cost on a 5-bed new build

The 7.6 kWp FHS-required array for a typical 5-bed executive home. Volume developer pricing, self-build retail pricing, and the case for adding 16 kWh battery and EV charging.

Get a fixed quote FHS PV calculator

5-bed new builds — the upper end of volume housebuilder catalogues and the majority of architect-led self-build work — need the largest FHS-required solar arrays. Typical 7.6 kWp arrays produce more electricity than the household consumes during summer months, making battery storage and EV charging integration valuable for capturing the surplus. This page covers the full FHS package pricing across both volume and self-build procurement routes.

Volume developer pricing — 5-bed executive (7.6 kWp)

Item	Cost
18 × 425W mono panels (Q CELLS / LONGi)	£2,700
8 kW hybrid inverter	£1,200
In-roof mounting (larger area)	£890
Installation labour	£680
Cabling, monitoring, EV pre-fit	£420
MCS, commissioning, warranty	£380
Total PV — developer volume	£6,270

Self-build retail — 5-bed (7.6 kWp + 16 kWh battery + EV charger)

Item	Cost
18 × 425W premium panels	£3,780
10 kW hybrid inverter with optimisers	£2,100
In-roof premium mounting	£1,080
Installation labour (premium)	£1,650
Cabling, monitoring, custom integration	£580
SAP/HEM, MCS, project management	£780
Subtotal — PV only	£9,970
16 kWh battery (Tesla Powerwall 3 or GivEnergy 16.4)	£6,500
Zappi v2 7 kW EV charger (solar-aware)	£1,400
Total — self-build (0% VAT applied)	£17,870

Annual savings for a 5-bed household

5-bed households use significantly more electricity than smaller homes: typical 14,000-16,000 kWh/yr with ASHP heating, electric cooking, 2 EVs (24,000 miles combined), and home office equipment. A 7.6 kWp south-facing array generates ~7,200 kWh/yr in the South Midlands — covering roughly half of household annual consumption.

Scenario	Self-consumed	Exported	Annual £ benefit
7.6 kWp PV alone	3,960 kWh	3,240 kWh	£1,130
7.6 kWp + 16 kWh battery	5,400 kWh	1,800 kWh	£1,330
7.6 kWp + 16 kWh + EV solar-divert	6,120 kWh	1,080 kWh	£1,440

PV-only payback on a £6,270 volume developer install: 5.5 years. Self-build with battery and EV charger (£17,870): 12.4 years simple payback — recovered well within the 25-year panel performance warranty period.

For other sizes: 3-bed · 4-bed. Full breakdown: cost guide.

40% of ground floor area

PV / ground floor area

Mar 2027

FHS in force

75%

CO₂ vs 2013 baseline

£4,350 per dwelling

Per-plot premium

For developers and housebuilders

5-bed new build solar PV for volume new-build programmes

Per-plot pricing locked at procurement. Factory pre-fit on panelised roof cassettes. SAP/HEM modelling for every house type included. NHBC, LABC, Premier and Buildmark warranty-accepted workmanship. 20-year insurance-backed system warranty. We work with developers from 50 plots to 5,000+ across multi-site frameworks — agreed pricing, agreed programme, agreed warranty stack.

Developer hub →

For self-builders and architects

5-bed new build solar PV for one-off custom builds

Engagement from RIBA Stage 2. PV sizing collaborative with the architect. SAP/HEM modelling that gives the architect freedom on glazing ratios and roof geometry. Building Control submission pack ready for the Approved Inspector. 0% VAT on new-build dwellings. Staged invoicing aligned to your self-build mortgage drawdowns. We work with custom-build buyers across England, Wales and Scotland.

Self-build hub →

How this fits into the FHS compliance pathway

Every FHS-compliant new build must pass three regulatory gates. 5-bed new build solar PV fits primarily into the second gate — design-stage Part L compliance — but has knock-on implications for Building Control sign-off and post-completion warranty:

1
Planning permission Most solar PV on new dwellings is consented within the dwelling\'s primary planning consent. Conservation Areas, Article 4 directions and listed-curtilage plots require additional planning consideration — we handle the planning evidence required for these.
2
Building Control — Part L compliance SAP 10.3 or HEM compliance modelling demonstrating Dwelling Emission Rate ≤ Target Emission Rate. PV specification, ASHP capacity, fabric U-values and air permeability all entered into the modelling. We provide the full compliance file ready for the Approved Inspector.
3
Post-completion — warranty & EPC MCS certificate, EPC, monitoring app onboarding and 20-year insurance-backed workmanship warranty. NHBC, LABC, Premier and Buildmark all accept our installation specification without query — important if you\'re relying on a structural warranty for buyer mortgageability.

For a fuller walkthrough of the compliance process, see our Part L 2026 page and the FHS PV calculator which sizes a compliant system from your ground floor area in 30 seconds.

FAQ — 5-bed solar cost

How big does the solar array need to be on a 5-bed?

A typical 5-bed executive new build has 200-240 m² total floor area with 85-110 m² ground floor. At FHS 40% PV coverage that's 34-44 m² of panel area — typically 16-20 panels totalling 6.8-8.4 kWp. Most 5-bed plans accommodate the larger array on a single south-facing roof pitch; a small number of asymmetric house types need east-west split arrays.

Is 7.6 kWp generation actually useful for a 5-bed household?

Yes — 5-bed households consume materially more electricity than smaller homes. Typical 5-bed annual consumption with ASHP heating, electric cooking, 2 EVs and home office equipment: 14,000-16,000 kWh. A 7.6 kWp array generates ~7,200 kWh/yr in the South Midlands. Even with a 13-16 kWh battery, self-consumption rarely exceeds 75% because household demand exceeds generation. Net result: low export, high household offset.

Does the larger PV need a 3-phase grid connection?

Above 11.04 kWp (16A per phase) most DNOs require a 3-phase connection. A 7.6 kWp array is comfortably within single-phase limits. The DNO grid connection notification (G99) is filed by us; no separate application from the homeowner is required. For installations near the 11 kWp limit a 3-phase inverter may be specified anyway to support future EV charger expansion.

FHS 2027 deadline approaching

Get an FHS-compliant solar quote in 48 hours

Tell us your plot details — ground floor area, location and target start-on-site date. We return a fully-costed system sized to Part L 2026 (40% PV rule), with the SAP/HEM compliance pack included.

Get my free quote Try the FHS calculator 📞 0330 088 5421