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September 30, 2026

5 min read

Five questions to ask before you sign a solar quote

Warranties, yield estimates, roof checks and aftercare. What separates a good solar offer from a cheap one.

Five questions to ask before you sign a solar quote

Two quotes for the same roof can look similar on price and very different five years later. These questions help you compare them fairly.

1. Who does the installation?

Ask whether the installers are employed by the company or subcontracted. In-house teams usually mean clearer responsibility.

2. How was the yield estimated?

A serious estimate includes roof angle, orientation and shading, not just the number of panels.

3. What happens after handover?

  • Monitoring and alerts
  • Response time for faults
  • Who handles warranty claims

The last two questions cover roof condition and payment terms. Both are worth asking in writing.

Written by

Jonas Weber

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