Off-Grid Solar Systems

For homeowners seeking genuine energy independence, rural properties beyond economic reach of the grid, remote cabins, agricultural outbuildings, or simply those who want to generate and use electricity entirely on their own terms — an off-grid solar system is the definitive answer. At Solar Briton, we supply complete off-grid solar system packages engineered for real UK conditions, where variable weather, short winter days, and overcast spells make intelligent system design absolutely critical.

An off-grid solar system is more than solar panels without a grid connection. It is a fully integrated energy ecosystem: solar PV panels generate power from daylight, a charge controller regulates the flow of energy, a high-capacity battery bank (typically lithium iron phosphate, LiFePO4) stores it, and a specialist off-grid inverter converts stored DC power into the AC electricity your home uses. Unlike standard grid-tied systems, which shut down automatically during power cuts for network safety, off-grid systems create an entirely independent power supply — your lights and appliances keep running regardless of what is happening on the national grid.

Off-grid solar is particularly well-matched to UK rural and remote properties, holiday lets, shepherd huts, glamping sites, off-grid retreats, and permanent homes where a DNO grid connection quote has come back at five or six figures.

System sizing is everything. A modest garden office may need a 1–2kW array with 5–10kWh of storage. A full family home living entirely off-grid in the UK typically needs 6–10kW of panels and 20–40kWh of battery capacity to comfortably cover short winter generation windows. Our team provides bespoke system sizing consultations based on your postcode, daily energy usage, and how many days of autonomy you need.

All components are supplied at 0% VAT and sourced from MCS-aligned manufacturers with full UK warranty support.

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TOP 3 ITEMS — KEY PRICES & TYPE STATS:

  1. SMALL OFF-GRID SYSTEM

    (Cabin / Garden Office / Holiday Let)

  • System Size: 1 – 2kW solar panels + 5 – 10kWh LiFePO4 battery bank
  • Price Range: £5,000 – £9,000 fully installed
  • Battery Cost: 5kWh LiFePO4 battery from approx. £2,500 – £4,000
  • Inverter: Off-grid inverter included; typical cost £1,500 – £2,000
  • Best For: Garden studios, holiday pods, shepherd huts, campsite power
  • Autonomy: 2 – 3 days without sunlight on a well-sized system

  1. MEDIUM OFF-GRID SYSTEM

    (Small Rural Home / Farm Office)

  • System Size: 4 – 5kW solar panels + 10 – 20kWh battery bank
  • Price Range: £12,000 – £22,000 fully installed
  • Battery Cost: 10kWh lithium battery: £5,000 – £8,000
  • Inverter: Off-grid inverter: £1,500 – £2,500
  • Charge Controller: £300 – £600 (MPPT)
  • Best For: Small permanent rural homes, farm offices, countryside retreats
  • Note: Generator backup integration available for winter resilience

  1. LARGE OFF-GRID SYSTEM

    (Full Family Home — Year-Round)

  • System Size: 6 – 10kW solar panels + 20 – 40kWh battery bank
  • Price Range: £25,000 – £45,000 fully installed
  • Battery Cost: 20kWh+ LiFePO4 systems from £10,000 – £18,000
  • Off-Grid Inverter: £2,500 – £3,500 for high-capacity units
  • Best For: Permanent off-grid family homes, remote rural properties
  • Generator Backup: Recommended for November – February in most UK locations