A turnkey 5 kWp system typically costs CHF 12,000 to 15,000 in Switzerland before incentives. After deducting the one-off feed-in incentive of currently around CHF 1,800, around CHF 10,000 to 13,000 remains – the tax deduction comes on top. (Guideline values, as of: July 2026)
Key points in brief
- 5 kWp needs roughly 22 to 28 m² of roof area, depending on the module – about 11 to 12 modules.
- Calculated per kWp, small systems are more expensive than large ones: scaffolding and electrical work cost almost as much as for 10 kWp.
- As annual production, roughly 4,500 to 5,500 kWh is realistic on the Swiss Plateau – depending on location and orientation.
- In many cases it's worth checking whether the roof wouldn't be better fully utilised.
The costs at a glance
| Item | Guideline |
|---|---|
| 5 kWp system, turnkey (incl. installation, electrical work, VAT) | CHF 12,000–15,000 |
| One-off feed-in incentive (KLEIV, approx. CHF 360/kWp) | – approx. CHF 1,800 |
| Remaining investment | approx. CHF 10,200–13,200 |
Guideline values, as of: July 2026, before tax deduction. Pronovo's current rates and the individual quote are decisive.
Why the range? Roof covering, scaffolding effort and the condition of the house's electrical system account for the largest share, percentage-wise, on small systems. A simple tiled roof on a ground-floor bungalow sits at the lower end, a steep roof spanning three storeys with an old meter box at the upper end.
How much space and how much yield?
With today's modules (around 430–450 Wp each), 5 kWp consists of 11 to 12 modules and covers roughly 22 to 28 m². As annual yield, roughly 900 to 1,050 kWh per kWp is realistic on the Swiss Plateau – so for the 5 kWp system, about 4,500 to 5,500 kWh, depending on orientation, tilt and shading. For comparison: an average four-person household without a heat pump consumes around this amount.
Whether your roof allows this is shown by a first look at sonnendach.ch – and, definitively, a site visit.
For whom is 5 kWp the right size?
Honestly: less often than you'd think. The small system makes sense mainly when
- the roof area simply doesn't allow for more (small roof, dormers, chimneys, skylights),
- only a partial area gets good sun and the rest is shaded,
- or the budget is deliberately meant to stay limited.
In all other cases, we recommend at least calculating full coverage. The reason is above: the fixed costs are incurred either way. The step from 5 to 8 or 10 kWp costs significantly less than the first 5 kWp – and future consumers like an EV or heat pump fill the larger system faster than many expect. A later expansion, on the other hand, means: scaffolding again, an electrician again, registrations again. The details: Expanding a system.
Where can you save on a 5 kWp system – and where not?
You can save with clean planning: standard modules instead of a premium look, installation in one go together with any roof work, no unnecessary extras. What you shouldn't save on is inverter quality, the electrical installation and documentation – the follow-up costs of poor work reliably exceed the savings. How to spot the difference: Cheap vs. expensive.
The most common pattern in consultations for small systems: the enquiry says «about 5 kWp», the site visit reveals a roof with room for 9 or 10. When we then lay both variants side by side – price, price per kWp, expected production – the majority opt for the larger layout. Not because we talk them into it, but because the numbers speak for themselves.
Frequently asked questions
Is a 5 kWp system enough for a single-family home?
For today's consumption of a household without a heat pump and EV, often yes – on paper. In practice, though, part of the production falls at times when nobody is home. With a heat pump or EV, the system is quickly undersized.
How many modules is 5 kWp?
With current 430–450 Wp modules, that's 11 to 12 units, roughly 22 to 28 m² of area.
What does a 5 kWp system yield per year?
On the Swiss Plateau, typically around 4,500 to 5,500 kWh – depending on orientation, tilt and shading. A shade-free south roof is at the top, a pure east roof below.
Is a battery worthwhile at 5 kWp?
Rarely from the start – with small production there's little surplus left to store. It usually makes more sense to build a larger system. The context: Is a battery storage system worth it?
Free initial consultation
5 kWp, or full coverage after all?
We calculate both variants transparently side by side for you – free of charge and without obligation.
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Swissolar-certified specialist company · ESTI installation authorisation (Art. 14 NIV) · in Zurich since 2017 · over 150 systems completed · a personal answer from the specialist company, no call centre
Sources: Pronovo AG, EnergieSchweiz (sonnendach.ch), Swissolar.
Last updated: 9 July 2026 · Author: ecoEn editorial team
