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How long does installation and commissioning typically take?

Project timelines include engineering design, equipment procurement, permitting, electrical upgrades, delivery, installation, testing, and commissioning.

UpdatedJune 2026
Read time4 min read
CategoryCommercial Rooftop Solar
Reviewed byGI Engineering
Clear answer

Clear answer, explained.

Smaller systems can be installed within a few weeks, while larger or more complex projects—especially those requiring switchgear upgrades or utility coordination—may take longer. Commissioning includes system testing, safety verification, and integration with monitoring and controls.


Key points

What this means in practice.

  • Onsite installation: 2–8 weeks typical
  • Full project (design to commissioning): 2–4 months
  • Electrical upgrades or switchgear may extend timelines
  • Utility interconnection review may be required
  • Includes testing, configuration, and training
  • Minimal disruption to normal business operations

When this applies

Best-fit environments.

  • Solar-plus-storage retrofits or new builds
  • Offices, retail, warehouses, and commercial facilities
  • Peak shaving and backup battery systems
  • Projects requiring permits and inspections

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