Solar installers in New Jersey know exactly where jobs stall: the permit process. A contract gets signed, the installer is ready to go, and then three weeks disappear waiting on the municipality and the utility. Meanwhile the homeowner is asking every other day when the panels are going up.
It doesn't have to work that way. Here's the tight 10-day workflow we run on rooftop PV projects in NJ.
The condensed timeline
| Day | Milestone | |---|---| | 0 | Signed contract arrives | | 1 | Plan set, load calc, one-line complete | | 1 | F100 + F120 permit packet submitted to municipality | | 1 | Interconnection application submitted to utility | | 3-5 | Municipal plan review complete (or revision requested) | | 5-7 | Utility interconnection approval arrives | | 7-10 | Permit issued — installer ready to mount |
On a clean job — standard rooftop residential PV, 6-15 kW, no unusual roof structure, cooperative utility — this is achievable. We've done it on the majority of our 2025 solar filings in Hudson, Essex, and Bergen counties.
On a messy job (historic district, utility transformer constraint, unusual roof condition) it stretches. But 10 days is the target, and it's hit more often than not.
Day 0 — what we need from the installer
Before the clock starts, we need:
- Signed homeowner contract with full property details
- Proposed system design — panel model, inverter model, string configuration, total DC/AC capacity
- Roof plan with array layout, setbacks, and attachment method
- Site photo of the main service panel (interior shot showing all breakers)
- Utility bill from the homeowner (for interconnection application)
- Homeowner signature on the utility interconnection form
Most delays we see at Day 0 come from incomplete site photos. The utility interconnection application asks specific questions about existing service, and an unclear photo of the main panel means we're sending someone back to the roof for a better shot. Get the photo right the first time.
Day 1 — filing everything in parallel
This is the key to the 10-day timeline. We file three things the same day:
1. Municipal permit packet
- F100 (construction jacket)
- F120 (electrical subcode) — covers the inverter circuit, DC conductors, rapid shutdown, grounding
- F170 (building subcode, if required) — covers the structural attachment to the roof
- Signed one-line diagram
- NEC-compliant rapid shutdown and labeling plan
- Homeowner consent + contractor license
2. Utility interconnection application
- PSE&G, JCP&L, Atlantic City Electric, or Orange & Rockland depending on territory
- System capacity, inverter specs, DC/AC ratio
- Expected annual generation (kWh)
- Homeowner customer account number + signature
3. Structural verification
- If the roof framing analysis isn't already signed off by a structural engineer, we coordinate that in parallel
- For most rooftop residential, a standard truss is fine — but the municipality will ask
Filing these in parallel is the single biggest time saver. Waiting for the municipal permit before starting interconnection adds 2+ weeks for no reason. Both processes run independently.
Day 3-5 — handling the revision loop
This is where most solar jobs slip. The municipal reviewer comes back with a question — almost always on one of these:
- Rapid shutdown device placement — NEC 690.12 requirements, particularly PV Rapid Shutdown labels
- Grounding and bonding details on the DC side
- Conductor ampacity for high-DC-voltage strings
- Structural attachment spacing and load path
The revision loop is where hours-based expediters run up the meter. On our end, we handle revisions within 24 hours of receiving them so the clock keeps moving. Delayed revision responses are the single biggest killer of the 10-day timeline.
Day 5-7 — utility interconnection
The utility side has its own process. For standard rooftop PV under 15 kW, most NJ utilities have a simplified interconnection procedure that doesn't require a full engineering review — the utility just verifies the inverter is on their approved list and the service can accommodate the system.
Approval typically lands in 5-7 days for these. Larger systems (15-50 kW) trigger a more detailed review and can take 3-5 weeks.
Once approved, you get an interconnection agreement that the homeowner signs. This is the utility's go-ahead to install — you're now waiting only on the municipal permit.
Day 7-10 — permit issued
When the municipality issues the permit, the installer is ready to mount. The remaining steps:
- Mount and wire the array
- Rough inspection — city signs off on structural and DC wiring before cover
- Final inspection — city signs off on labeling, rapid shutdown, and AC-side tie-in
- Utility meter swap / PTO — the utility comes out, verifies the install, and grants Permission to Operate
Inspections can move fast under AB 573 — the 3-business-day rule we covered in our AB 573 guide. On solar specifically, use it. A missed final inspection delay is a homeowner sitting on a silent array for a week for no reason.
Where 10-day slips happen
Four common snags:
1. Historic districts. Hoboken, Jersey City downtown, Montclair historic neighborhoods, and similar areas trigger an HPC review in parallel with the permit. Add 2-4 weeks. Worth knowing before you quote the homeowner.
2. Roof age or condition. If the roof is under 5 years from needing replacement, some municipalities will ask for a statement from a roofer. Not a law, but common practice. Plan for it.
3. Panel upgrade required. If the existing 100A or 150A service can't handle the solar + back-feed calc, you need a service upgrade first. That's a separate permit, separate PSE&G ESI, and a different timeline.
4. Unusual inverter. If you're using an inverter not on the NJ utility approved list, interconnection takes significantly longer while it gets reviewed. Stick to the approved list when possible.
What we handle on our end
On every solar job we file:
- Full permit packet (F100 + F120 + structural as needed)
- Utility interconnection application
- All revision responses within 24 hours
- AB 573 timeline tracking on inspections
- Coordination with the homeowner, installer, and municipality throughout
Flat fee, filed the same day the signed contract hits our inbox. If you're a solar installer in NJ and your permit turnaround is stretching past 3 weeks on standard jobs, talk to us.