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PPA size: 100kWp PPA
100kWp PPA — UK 2026 indicative cost & PPA tariff
For a 100kWp PPA on-site solar system the UK 2026 indicative capex is £82,000–£105,000; under a PPA the year-1 tariff sits at 14–18 p/kWh. Mid-size factories, secondary schools, mid-range hotels, care home groups, single mid-warehouse.
2026 indicative numbers
| System size | 100kWp PPA |
| Indicative capex (cash) | £82,000–£105,000 |
| PPA tariff (year 1) | 14–18 p/kWh |
| Annual generation | 95,000 kWh |
| Indicative annual saving | £16,150+ (vs 30 p/kWh grid) |
| Typical audience | Mid-size factories, secondary schools, mid-range hotels, care home groups, single mid-warehouse. |
| Off-taker requirement | 10+ year tenure, £30k+ annual electricity spend, freehold preferred |
PPA vs cash purchase at this size
A 100kWp PPA system costs £82,000–£105,000 to buy outright. Under PPA you pay £0 upfront and get the same kWh for 14–18 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 100kWp PPA PPA tariff
60-second form. We'll match your site to providers comfortable at the 100kWp PPA band and return an indicative tariff within one working day.
FAQs
Size-specific FAQs
What is the typical capex for a 100kWp PPA system in 2026?
For a 100kWp PPA system in 2026, indicative capex is £82,000–£105,000. 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 100kWp PPA?
In the UK Midlands a 100kWp PPA system typically generates around 95,000 kWh/year — about 950 kWh/kWp. Southern UK gets 1,050; Scotland 850. We model your specific postcode in the calculator.
Who is a 100kWp PPA PPA suited to?
Mid-size factories, secondary schools, mid-range hotels, care home groups, single mid-warehouse.
What's the off-taker requirement for a 100kWp PPA PPA?
10+ year tenure, £30k+ annual electricity spend, freehold preferred
Get a 100kWp PPA indicative tariff in 24 hours
A 60-second form. We'll match you to PPA providers comfortable at the 100kWp PPA band and return a 14–18 p/kWh indicative tariff.
Get an indicative PPA tariff
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