Commercial Solar Energy Engineering & Design

Commercial Solar Engineering Company

Commercial, industrial, and agricultural solar and energy storage EPCs and developers trust SepiSolar to deliver complete permit-ready plan sets that ensure code compliance, decrease labor and material costs, and maintain solar project timelines.

SepiSolar’s NABCEP-certified engineers consider all utility and permitting requirements and project location and constraints. Following a commercial solar project kick-off call with a senior engineer to discuss further details and objectives, SepiSolar designs and engineers commercial systems to maximize solar generation, reduce efficiency losses, and uncover equipment and BOS savings.

Solar Design Package Icon

Complete Commercial Solar Design Packages:

Our permit-ready commercial solar and energy storage design packages are customized to the requirements of your local authority having jurisdiction (AHJ) and utility. Each plan set typically includes:

  • Project Description
  • Construction Notes
  • Governing Codes
  • Site Plan
  • PV Layout
  • Mounting & Racking Methods
  • Electrical Details
  • Three-Line Electrical Diagram
  • Electrical Calculations
  • Parts List and Required Safety Placards
  • Data Sheets for Modules, Inverters, Racking, Mounting
  • Elevation views as needed for certain jurisdictions
  • Other requirements as specified by your AHJ


Complete Scope of Commercial Solar Design Services

SepiSolar offers a complete scope of design and engineering services for all commercial, industrial, agricultural, municipal, university, school, and hospitals. SepiSolar’s commercial solar engineers design systems for:

  • Permitting and interconnection
  • Solar carports and canopies
  • EV charging stations for parking lots
  • Single axis-tracker system design
  • Ballasted and unballasted rooftops
  • Aggregated meters for warehouses and compounds
  • Agriculture and cold storage
  • Building integrated photovoltaic (BIPV)
  • Floating photovoltaic systems (Floatovoltaics)
  • AC- and DC-coupled energy storage systems for net energy metering, peak shaving, emergency backup, utility infrastructure deferral, and TOU arbitrage
  • New construction


Solar Energy Proposal

Pre-Contract C&I Solar & Energy Storage Support

  • Preliminary consultation to help you optimize your commercial solar PV project for cost, efficiency, and other project requirements
  • Feasibility analysis (electrical and structural)
  • Sales-focused wire diagrams and roof layouts for sales proposals or utility interconnection applications
  • Equipment recommendations and research
  • Commercial Risk management project consulting services
  • Engineering evaluation of project’s modules, inverters, trackers, storage and BOS components
  • Generating sales proposals
  • Commercial energy storage performance and financial modeling


Solar Permit with PE Stamp

P.E. Stamps (Professional Engineer) for Commercial Projects in all 50 States

Whether or not an electrical or structural P.E. stamp is required by your state or jurisdiction, electrical and structural P.E. stamps show your clients that your commercial solar or storage project was designed and engineered to provide the highest level of safety and performance.

A professional engineer’s structural and electrical seal demonstrates that you took the extra step to review your commercial project design with a third-party engineering firm, confirming that your project’s meets or exceeds all prevailing electrical and/or structural codes, permitting requirements, and safety standards. SepiSolar provides:

  • Electrical P.E. Stamps (wet or digital)
  • Structural P.E. Stamps (wet or digital)


Commercial Design Build & Changes

SepiSolar works with installers, developers, project managers, asset managers, and owners to make any needed or desired change to their commercial solar project:

  • Design rescue missions: SepiSolar revises plans to be compliant with AHJ and utility codes and standards for inspections, commissioning, and permitting
  • Update commercial solar designs for module, inverter, and BOS equipment changes
  • Add energy storage to existing projects
  • Technical support for commercial project construction teams in the field


Xero Solar stands behind all of our installations, and this is only as good as the design they are built on. We need to have confidence that we’re building systems based on sound technical plans and designs. Plans that we have confidence that will result in safe, effective, and compliant systems is crucial. The price of failure with defects on a finished project is severe, and it’s simply not worth trying to save a few dollars upfront only to be bitten down the road with failures. That’s why we partner with SepiSolar for all of our engineering and design needs for solar and storage.”

Ben Lochtenberg,
CEO of Xero Solar

Commercial solar engineering designs

Commercial solar engineering designs

Get commercial solar design & engineering pricing.

Get commercial solar engineering & design pricing.


Contact Our Commercial Solar Company

If you’re in California and looking for a commercial solar companies near me, we’re located in Freemont, CA and provide commercial design and engineering services state-wide and across the nation. Contact us today at (510) 940-9750 for all of your commercial solar project needs.


Mon – Fri
8:00 AM – 5:00 PM Pacific Time
Sat – Sun


3070 Osgood Court, Fremont, CA 94539


CA Small Business Enterprise

Certification ID:

Bidder/Supplier ID:

NAICS Codes:
541330 – Engineering services
541340 – Drafting services
541490 – Other specialized design services
541618 – Other management consulting services
541690 – Other scientific and technical consulting services
541990 – All other professional, scientific, and technical services

D-U-N-S number:

811024, 81101701, 81101516, 81101604, 43232614, 81101505

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