Founded by a former Sunrun design-outsourcing manager, with project experience tied to Sunrun, SunPower, and Sunnova.
Engineering support integrated into active operations
Engineering support serious installers rely on and enterprise residential teams can scale with.
Permit-ready drawings are the baseline. The value is what happens after review starts: clearer assumptions, faster revisions, and direct engineering support when the site, AHJ, utility, or field conditions change the path for an active team.
The same engineer stays close to the project when the review cycle gets messy.
Installers can create an account for saved calculator runs, exports, and billing. Enterprise residential teams should start with the dedicated engineering path. Review the route.
50-state
Licensed engineering support available across all 50 states.
Enterprise residential + installers
Built to support recurring operations teams, field crews, and approval-heavy workflows.
Direct contact access through AHJ review, revisions, and field questions.
Where we fit
Choose the support that matches your project.
Start with the kind of support you need first: enterprise residential teams or installers and electricians. Specialized scopes like commercial, AHJ, off-grid, and battery work stay organized separately as services.
Centralized workflow support
Enterprise Residential Teams
For centralized or multi-state residential operations teams that need queue reliability, standards memory, and engineering support that stays attached through revisions.
Review enterprise support
Field accountability
Installers and Electricians
For regional and mixed-scope crews that need install-ready documents, same-day engineering, and a clean handoff into repeatable tools when the job escalates.
Review installer supportSpecialty scopes
Commercial and specialty engineering are organized separately from the core service categories.
Commercial engineering, AHJ support, off-grid, battery, and software-assisted services are organized separately once the right fit is clear.
What teams hire us to own
Engineering support that reduces ambiguity instead of adding another handoff.
The work is not just drawing production. It is scope definition, calculation rigor, revision ownership, and clean field handoff.
Permit package engineering
Single-lines, calculations, conductor sizing, equipment schedules, and documentation built for review clarity.
Revision ownership
AHJ and utility comments are handled as part of the engineering relationship, not left to the field to interpret.
Direct technical thread
The engineer stays reachable when drawings, site conditions, and installation realities stop matching.
Workflow continuity
Calculator runs, project intake, and revision support stay on one technical thread when the job changes.
Public proof
What current partners say after they integrate us into their workflow.
These references come from current partners and show what support looks like after we've established a working SOP, workflow, and revision process.
“Anthony and the GBI team have been an exceptional partner for our engineering and design needs. Their PV plans and EE/PE stamping are consistently accurate, and they stay proactive on the details that matter, from Tesla and SPAN communication checks to exact equipment specs on complex commercial jobs. The process is easy to manage through their streamlined project portal, clear monthly invoicing, and responsive communication. For installers that need a reliable and honest engineering partner, I highly recommend GBI.”
Includes recurring installer workflow support and complex commercial coordination, including equipment verification and communication checks.
“Working with Anthony Gianfrancesco and his team has been a game-changer for our operations. As a high-volume installer, we need an engineering partner who is technically sharp and current on utility requirements like Xcel Energy and United Power. Anthony consistently supports everything from standard residential plan sets to complex smart inverter and battery configurations, including Canadian Solar EP Cube 2.0 systems. He is proactive with AHJ revisions, responsive under install-schedule pressure, and dependable in getting projects to PTO efficiently. If you need full-service engineering support from PE stamps through utility application processing, I highly recommend Anthony and his team.”
High-volume installer support across utility completeness-review cycles, AHJ revisions, and complex inverter/battery configurations.
“We've worked with Anthony and his team on numerous complex projects ranging from solar to EV charging and off-grid installations. Their engineering is consistently precise, responsive, and technically sharp - exactly what's needed when accuracy and compliance matter. They are a reliable partner we trust on high-level electrical and renewable energy projects.”
Recurring support across complex solar, EV charging, and off-grid projects where precision, compliance, and fast engineering response are critical.
“Our long-standing partnership with Anthony has been instrumental in navigating complex solar, storage, and utility interconnection projects. His team is highly responsive and detail-oriented, especially when managing AHJ revisions, single-line corrections, and intricate submittals. They are a dependable and knowledgeable partner in renewable energy design and compliance.”
Projects with complex AHJ revisions and utility interconnection often need rapid technical clarification and resubmittal support.
“Working with Anthony and his team has been fantastic. Their professionalism and deep knowledge of the solar permitting process consistently impress me. They're reliable, deliver high-quality work every time, and are a trusted resource in the industry. I'll continue sending referrals their way.”
Ongoing referral partnership centered on reliable permitting support and consistently high-quality technical deliverables.
“I've worked with Anthony for years, and I wouldn't trust anyone else with my business. He's not just a service provider - he's a true partner who genuinely cares about my success. The work is always top-tier, and his dedication and character are unmatched.”
Long-term installer relationship built on trust, business continuity, and repeatable engineering quality across projects.
How we work
A good engineering partner reduces ambiguity while the job is moving.
The working style stays the same on every job: define the constraint, explain the risk, document the path forward, while staying available when the path changes.
01
Scope before assumptions
We start by defining service limits, equipment constraints, and code risk before promising a clean path.
02
Direct accountability
When comments come back or field conditions shift, the same engineering team stays attached to the decision.
03
Operational memory
Recurring clients gain policy consistency, AHJ familiarity, and fewer repeated explanation cycles over time.
NEC-compliant load calculator
Start with the documented constraint before the plan set takes shape.
The calculator is a real front door to engineering, not a detached tool. Use it to verify load, produce documentation, and escalate when the scope outgrows the model.
Tool + engineering handoff
Model the load. Export the documentation. Escalate when the job gets real.
Teams use the calculator to eliminate basic uncertainty early. When the project needs review support, stamping, or revised sheets, the transition into engineering is direct.
Validate service limits before equipment decisions.
Generate documented NEC load calculations for permit workflow.
Escalate to engineering when stamped deliverables or revisions are needed.
Keep one technical thread from calculator output to full engineering support.
Free calculator access
Credit-based PDF exports
Pro tier for higher-volume teams
Direct escalation to engineering support
Direct engineering intake
Bring one live project. We will map the viable path.
Bring one active project, one correction notice, or one ambiguous scope. We will tell you what is constrained, what is missing, and what the viable next step is.