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solar thermal quote: is the price right?
For “solar thermal” work, a typical Swiss quote ranges from CHF 11'900 to CHF 31'400 including VAT for a mid-sized project. Here are the items it should contain and the questions to ask.
Reference price
Typical project: 6 m² · 1003 · House
Low
CHF 11'900
Central
CHF 20'900
High
CHF 31'400
Items a complete quote must include
Scaffolding (erection, hire, removal)
Major item, often 10–20% of the budget.
Solar tank
Often the main item.
Hydraulic connection
Should be detailed.
Commissioning and settings
Required for warranty and grants.
Permit procedures
Who files the application, and at what cost?
Common pitfalls
- A deposit above 30% before work starts.
- Lump sums without quantities or unit prices.
- No brand or model for equipment.
- No mention of VAT, validity or timeline.
- Disposal, scaffolding or connections missing.
- A price far below other quotes, unexplained.
Questions to ask the contractor
- Is “Scaffolding (erection, hire, removal)” included in the price?
- Is “Solar tank” included in the price?
- Is “Hydraulic connection” included in the price?
- Could you break down the lump sums (quantities, unit prices, materials)?
- Which warranty applies (SIA 118, duration)?
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