Solar site surveying.
The solar energy industry is no stranger to abrupt market changes, and 2025 has been no exception. Many solar contractors have packed installation calendars, with clients eager to capture the full value of the federal solar Investment Tax Credit (ITC) in the United States. This urgency means solar companies must be diligent that their post-sales process progresses without delays.
One of the most critical steps in keeping projects on a tight schedule is fast solar permitting and inspections. A stalled or rejected solar permit application can cost weeks, jeopardize deadlines and strain customer relationships. First-pass approval is more important than ever, because the clock is ticking.
AHJ solar permitting requirements: What contractors need to know
An authority having jurisdiction (AHJ) approves solar permits within its designated area and is responsible for enforcing building and electrical codes. Some approve solar permits in a matter of days, while others take weeks to review applications. Permit processing times can vary widely across jurisdictions and by project type.
Likewise, local permit requirements vary by the AHJ. Tools like SolarAPP+, developed by NREL, help automate residential solar permitting when adopted by AHJs, though the platform isn’t available for commercial projects.
As a result, it is critical to cater solar permit applications to AHJ requirements. This can be especially challenging when solar companies expand into new areas and must work with new AHJs that have different requirements.
Some jurisdictions or utility interconnection rules require structural or electrical engineering stamps. Structural stamps are more common in areas with heavy snow loads, high wind speeds or greater seismic risk.
These stamps must be issued by a licensed professional engineer (PE) in the state where the project is located. For example, a coastal Florida AHJ may require diligent wind load calculations for hurricane conditions.
Common reasons solar permit applications are rejected
There are several avoidable culprits that cause the majority of permit resubmissions. These errors include missing structural load calculations, incomplete or inaccurate single-line or three-line diagrams, and not meeting required codes. This includes the NEC (National Electric Code), building codes and local code amendments.
Top solar permit rejection issues
- Incomplete or inaccurate PV plan sets – Missing site plans, mislabeled equipment or incomplete single-line or three-line diagrams
- Missing structural load calculations – Especially in areas with heavy snowfall, high wind or seismic activity
- Incorrect or missing electrical details – Conductor sizing errors, improper breaker ratings and missing equipment grounding conductors
- Not Complying with NEC or IBC codes – AHJs often cite NEC Article 690 (PV systems), 705 (interconnections) and International Building Code (IBC) sections, but local amendments may also apply
- Incorrect system labeling and placards – Missing rapid shutdown labels, incorrect disconnect signage or improperly formatted warnings
- Missing specification sheets – Missing module, inverter, racking or battery cut sheets with UL listings
- Improper setbacks and fire access pathways – Violations of local fire code or inadequate clearance on rooftops
- Lack of required engineering stamps – Structural or electrical PE stamps not included, or not from a professional licensed in that state
Unfortunately, past permit rejections can decrease a solar company’s credibility with the AHJ and stall project timelines. When in doubt, solar contractors should clarify permit requirements before applying, especially when working under tight deadlines.
Fast solar permitting strategies
As solar companies scramble to meet solar ITC deadlines, it’s easy to make small mistakes that lead to project delays. Following best practices to submit a complete solar permit package initially is critical.
- AHJ solar permit requirements commonly include:
- A solar site plan
- Electrical single-line or three-line diagrams
- Structural load calculations
- Equipment spec sheets
- Required labeling and warnings
- Fire access pathways and setbacks
- Grid interconnection details
In addition, it is helpful to understand interconnection requirements, as some utilities may require additional paperwork or review steps. Waiting until receiving solar permit approval can stall the project and cause unpleasant surprises.
A quality solar permit application starts with an accurate assessment of the site conditions. Flagging design and layout constraints early can help companies sidestep permit rejections. Utilizing innovative drone technology helps ensure that systems fit within their allotted space.
Some solar companies use solar permit design services, site survey or engineering services, especially for larger commercial projects that have more extensive permit requirements or when their teams are stretched thin. This strategy can be especially effective when working under tight deadlines or dealing with new AHJs.
The most effective design partners, like Exactus Energy, go beyond just completing solar permit paperwork. By using drones and proprietary software, they ensure the solar designs fit the roof and flag issues like roof damage or electrical risks before they become expensive surprises. An experienced firm is also aware of the specific requirements of AHJs, allowing contractors to submit customized permit applications that meet local criteria on the first attempt.
As solar contractors put the pedal to the metal to meet the solar tax credit deadlines, fast solar permitting can make or break many projects. Companies may have crews scheduled and equipment on site, but without permit approval, everything comes to a halt. Delays of just a few weeks can result in missing deadlines, a lower return on investment and a reduction in customer trust.
Balancing speed and code compliance is essential for first-pass approval. Unfortunately, cutting corners is not an option, as inspectors and utility providers expect designs that meet NEC, IBC and interconnection standards.
Solar companies thriving in the turbulent 2025 solar market are those that take solar permit applications and inspections seriously. Accurate PV drawings, proactive interconnection planning and required structural calculations are what keep renewable energy projects marching forward.
