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PPA size: 5MWp PPA (ground-mount or large rooftop)
5MWp PPA (ground-mount or large rooftop) — UK 2026 indicative cost & PPA tariff
For a 5MWp PPA (ground-mount or large rooftop) on-site solar system the UK 2026 indicative capex is £3.5m–£4.5m; under a PPA the year-1 tariff sits at 8–11 p/kWh. Industrial estates, port authorities, dairy/poultry farms with ground-mount, council portfolio aggregation.
2026 indicative numbers
| System size | 5MWp PPA (ground-mount or large rooftop) |
| Indicative capex (cash) | £3.5m–£4.5m |
| PPA tariff (year 1) | 8–11 p/kWh |
| Annual generation | 4,750,000 kWh |
| Indicative annual saving | £807,500+ (vs 30 p/kWh grid) |
| Typical audience | Industrial estates, port authorities, dairy/poultry farms with ground-mount, council portfolio aggregation. |
| Off-taker requirement | 25 year contract, £1.5m+ annual electricity spend |
PPA vs cash purchase at this size
A 5MWp PPA (ground-mount or large rooftop) system costs £3.5m–£4.5m to buy outright. Under PPA you pay £0 upfront and get the same kWh for 8–11 p/kWh. Over 25 years a cash purchase typically costs less in total — but ties up capital and puts performance risk on you. See our PPA vs cash comparison.
What drives the tariff at this size
- System size — bigger systems = lower £/Wp = lower p/kWh
- Roof condition and complexity (penetrations, shading, age)
- DNO connection availability — G99 capacity drives build cost
- Off-taker covenant rating
- Contract term (15 vs 20 vs 25 years)
- Escalator structure (fixed vs RPI-linked)
Get a 5MWp PPA (ground-mount or large rooftop) PPA tariff
60-second form. We'll match your site to providers comfortable at the 5MWp PPA (ground-mount or large rooftop) band and return an indicative tariff within one working day.
FAQs
Size-specific FAQs
What is the typical capex for a 5MWp PPA (ground-mount or large rooftop) system in 2026?
For a 5MWp PPA (ground-mount or large rooftop) system in 2026, indicative capex is £3.5m–£4.5m. Under a PPA you don't pay this directly — the provider funds the system and you pay a per-kWh tariff.
What annual generation should I expect from a 5MWp PPA (ground-mount or large rooftop)?
In the UK Midlands a 5MWp PPA (ground-mount or large rooftop) system typically generates around 4,750,000 kWh/year — about 950 kWh/kWp. Southern UK gets 1,050; Scotland 850. We model your specific postcode in the calculator.
Who is a 5MWp PPA (ground-mount or large rooftop) PPA suited to?
Industrial estates, port authorities, dairy/poultry farms with ground-mount, council portfolio aggregation.
What's the off-taker requirement for a 5MWp PPA (ground-mount or large rooftop) PPA?
25 year contract, £1.5m+ annual electricity spend
Get a 5MWp PPA (ground-mount or large rooftop) indicative tariff in 24 hours
A 60-second form. We'll match you to PPA providers comfortable at the 5MWp PPA (ground-mount or large rooftop) band and return a 8–11 p/kWh indicative tariff.
Get an indicative PPA tariff
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