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home battery quote: is the price right?

For “home battery” work, a typical Swiss quote ranges from CHF 7'400 to CHF 17'600 including VAT for a mid-sized project. Here are the items it should contain and the questions to ask.

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Reference price

Typical project: 10 kWh · 1003 · House

Low

CHF 7'400

Central

CHF 11'600

High

CHF 17'600

Items a complete quote must include

  • Electrical connection

    Often subcontracted and missing from the main quote.

  • Commissioning and settings

    Required for warranty and grants.

  • Guaranteed usable capacity

    Nominal capacity can mislead.

  • Warranty in cycles / years

    Compare on the same basis.

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

  1. Is “Electrical connection” included in the price?
  2. Is “Commissioning and settings” included in the price?
  3. Is “Guaranteed usable capacity” included in the price?
  4. Could you break down the lump sums (quantities, unit prices, materials)?
  5. Which warranty applies (SIA 118, duration)?

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