A Typical Commercial Solar Installation Project Timeline
Constructing a commercial solar installation is a multi-stage process. This outline details the typical project timeline for large scale commercial systems over 100 kW and under 5 MW; from initial contracting through to system operation, based on industry best practices and Sussex Energy's experience and project workflows.
Contracting Phase (4 to 8 Weeks)
This phase begins with signing a Letter of Intent (LOI) with Sussex Energy, formalizing the partnership and initiating the project. Following the LOI, Sussex Energy, the site owner, and if applicable, bank or financing partner, collaboratively draft term sheets, outlining each party's roles and responsibilities. These are reviewed, finalized, and digitally signed. An onboarding call then follows to introduce all parties, clarify roles, and establish action items, including document submission timelines. The site owner then provides essential documents to the bank or financing partner, which may include audited financial statements, as-built drawings of their facility, and other necessary documentation such as Subordination, Non-Disturbance, and Attornment Agreements, Operating Agreements, and evidence of property ownership. This document collection and review process usually takes 2 to 4 weeks. When a bank or lending partner is involved, the project then enters underwriting, after which the contracts are finalized and digitally signed, concluding the contracting phase in another 2 to 4 weeks.
Development and Construction Phase (7 to 14 Months)
The development and construction phase begins with engineering and permitting, lasting 4 to 6 months. This involves formal system design, utility interconnection applications, securing permits from local authorities, and any applications for community solar programs if applicable. Next, if roof restoration or other non-solar upgrades are included in the scope, this work commences after permitting and utility approvals, and may add 4 to 8 weeks prior to the solar mobilization. Major solar materials are ordered during this period to ensure timely delivery. The solar installation itself then follows, spanning 3 to 6 months. Of this, the active construction, including installing racking systems, panels, inverters, and wiring, takes about 2 to 4 months, and the remaining 1 to 2 months are dedicated to cleanup, punch lists, inspections, and commissioning to ensure the system meets all standards.
Activation and Operation Phase (4 to 8 Weeks)
This final phase involves final certifications from relevant authorities, followed by system activation. Once activated, a comprehensive maintenance program is established to monitor, troubleshoot, and maintain optimal system performance over its lifetime.
Summary
So depending on the size, scope, and processing speed of the town and utility; a typical project timeline can run anywhere from 9 to 18 months.
Sussex Energy expertly manages every step of the commercial solar installation process, ensuring your solar investment is delivered in a timely manner, within budget, and optimized for long-term performance. Contact Sussex Energy today to learn more.
