Solar panel pricing
Solar Panel Cost UK 2026
A typical home solar system costs £5,000–£9,500 fitted in the UK in 2026, depending on size — a 4 kW system (the most common) is £6,500–£9,500, and adding a battery takes a full solar + battery package to around £13,000–£16,000. 0% VAT runs until 31 March 2027. Here is the complete price breakdown by system size, what drives the cost, and how fast it pays back.
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What you pay
Price ranges
| Specification | Price range |
|---|---|
| Small 3 kW system (8–9 panels) | £5,000 – £6,500 |
| Standard 4 kW system (11 panels) | £6,500 – £9,500 |
| Larger 6 kW system (16 panels) | £8,200 – £10,800 |
| 10 kW system (26 panels, 3-phase) | £12,000 – £15,500 |
| Solar + Tesla Powerwall 3 (4 kW + 13.5 kWh) | £14,500 – £16,200 |
| Solar + EcoFlow PowerOcean (4 kW + 10 kWh) | £13,200 – £14,800 |
Where the money goes
Cost breakdown
| Component | % of cost |
|---|---|
| Panels (Tier-1, 430–500W) | 22% |
| Inverter (string or hybrid) | 15% |
| Optimisers (shaded roofs) | 5% |
| Mounting + bracketry | 6% |
| Cabling, isolators, MC4 | 2% |
| Scaffolding (2–3 days hire) | 8% |
| Labour (2 engineers) | 11% |
| DNO + MCS + SEG paperwork | 4% |
| Margin + overheads | 27% |
What changes the price
Variables
- System size The biggest single driver — £/W falls as the system grows, so larger systems are cheaper per kW
- Battery storage Adding a battery roughly doubles the package price but lifts self-consumption from ~30% to 80%+
- Panel tier £1,400–£2,200 spread between standard (JA Solar) and premium (REC AlphaPure)
- Roof complexity +£200 to +£1,500 — split arrays, dormers, slate, or felt/roof prep work
- 0% VAT Solar, batteries and installation are 0%-rated VAT until 31 March 2027 — saving £1,000–£2,400 vs 20%
- DNO requirements +£0 to +£250 for G99; three-phase upgrades only on 10 kW+ systems
Return on investment
Payback model
Annual savings and payback by tariff combination. Modelled against typical UK consumption profile.
| Setup | Annual saving | Payback |
|---|---|---|
| 4 kW solar only, Octopus Flux (24p export) | £560 | 12 years |
| 4 kW + Tesla Powerwall, Octopus Flux | £1,184 | 10–12 years |
| 6 kW + battery, Flux, EV-charging home | £1,580 | 11 years |
Common questions
FAQs
How much do solar panels cost in the UK in 2026?
For a typical home, expect £5,000–£9,500 fitted depending on size. A standard 4 kW system on a 3-bed semi is £6,500–£9,500. A full solar + battery package (panels plus a Tesla Powerwall or EcoFlow) is around £13,000–£16,000. All prices are 0%-rated VAT until 31 March 2027.
Are solar panels still worth it in 2026?
Yes — with electricity around 28p/kWh and panels generating for 25+ years, a 4 kW system typically saves £480–£560/year on solar alone, or £1,100+/year paired with a battery and a smart export tariff like Octopus Flux. Payback is usually 10–12 years, leaving 13+ years of effectively free generation.
Do solar panels still get 0% VAT?
Yes. Solar panels, battery storage and the installation labour are all zero-rated for VAT until 31 March 2027, which saves £1,000–£2,400 on a typical domestic system versus the old 20% rate.
How much does it cost to add a battery?
Adding battery storage to a new solar install adds roughly £6,800–£9,400 depending on capacity and brand. It is the single highest-impact upgrade — self-consumption jumps from ~30% to 80%+, and it unlocks smart tariffs. Many homeowners install both together to share one set of scaffolding and one survey.
Can I finance solar panels?
Yes — Phoenix Financial 0% to 10.9% APR, from around £79/month over 10 years on a standard £8,000 system. Model your own payback on /finance-calculator/.
What size solar system do I need?
A 3-bed home with average usage suits 4 kW. Larger 4-bed homes, EV owners and heat-pump households suit 6 kW. Only very large homes or light-commercial sites need 10 kW (which requires three-phase supply). We size it precisely at the free survey.
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