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PPA size: 500kWp PPA
500kWp PPA — UK 2026 indicative cost & PPA tariff
For a 500kWp PPA on-site solar system the UK 2026 indicative capex is £395,000–£500,000; under a PPA the year-1 tariff sits at 11–14 p/kWh. Large factories, refrigerated distribution, NHS Trust acute sites, university campuses, food processors.
2026 indicative numbers
| System size | 500kWp PPA |
| Indicative capex (cash) | £395,000–£500,000 |
| PPA tariff (year 1) | 11–14 p/kWh |
| Annual generation | 475,000 kWh |
| Indicative annual saving | £80,750+ (vs 30 p/kWh grid) |
| Typical audience | Large factories, refrigerated distribution, NHS Trust acute sites, university campuses, food processors. |
| Off-taker requirement | 20+ year tenure, £180k+ annual electricity spend, investment-grade off-taker |
PPA vs cash purchase at this size
A 500kWp PPA system costs £395,000–£500,000 to buy outright. Under PPA you pay £0 upfront and get the same kWh for 11–14 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 500kWp PPA PPA tariff
60-second form. We'll match your site to providers comfortable at the 500kWp PPA band and return an indicative tariff within one working day.
FAQs
Size-specific FAQs
What is the typical capex for a 500kWp PPA system in 2026?
For a 500kWp PPA system in 2026, indicative capex is £395,000–£500,000. 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 500kWp PPA?
In the UK Midlands a 500kWp PPA system typically generates around 475,000 kWh/year — about 950 kWh/kWp. Southern UK gets 1,050; Scotland 850. We model your specific postcode in the calculator.
Who is a 500kWp PPA PPA suited to?
Large factories, refrigerated distribution, NHS Trust acute sites, university campuses, food processors.
What's the off-taker requirement for a 500kWp PPA PPA?
20+ year tenure, £180k+ annual electricity spend, investment-grade off-taker
Get a 500kWp PPA indicative tariff in 24 hours
A 60-second form. We'll match you to PPA providers comfortable at the 500kWp PPA band and return a 11–14 p/kWh indicative tariff.
Get an indicative PPA tariff
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