FAT/SAT Commissioning
We simulate the grid on the bench, and we verify every tag in the dirt. Pass utility witness testing the first time.
Five gates between "hardware works" and "the utility says yes."
A plant isn't done until the ISO can see it. We run the same five gates on every project — the same checklist, the same artefacts, the same signed paper trail.
Stage 01
Stage 01
4 – 8 wk
Design Review
IP schedule, point list, network topology, and BOM frozen against utility requirements.
→ Approved architecture drawing
4 – 8 wk
Stage 02
Stage 02
2 – 3 days
Factory Acceptance Test
On the bench in Charlotte: panels powered up, simulated grid, every tag verified before shipping.
→ Signed FAT report
2 – 3 days
Stage 03
Stage 03
5 – 10 days
Site Acceptance Test
On site: every inverter, tracker, and MET sensor walked end-to-end with the EPC's commissioning lead.
→ Signed SAT checklist
5 – 10 days
Stage 04
Stage 04
1 – 2 days
Utility Witness
The utility observes our test pack: ride-through, curtailment, telemetry sample, alarm verification.
→ Witness sign-off
1 – 2 days
Stage 05
Stage 05
COD day
Commercial Operation
Plant talks to the ISO. Telemetry confirmed. Revenue meter starts ticking.
→ COD letter
COD day
- Factory bench-test before shipping
- Point-to-point in the field
- Utility witness on call
Mechanical completion is not commercial operation.
If your SCADA tags don't map correctly during utility witness testing, COD slips by weeks. Each week of delay is real lost revenue against a fixed amortisation schedule and a tax-equity timer.
We build the test pack alongside the design — not afterwards. By the time the utility shows up on site, every test on their list has already passed once on our bench and once in our SAT walk-down.
The result: first-pass witness acceptance on every project we've commissioned since 2018.
Signed FAT Reports
Hardware and logic proven before they ever leave the shop. Test certificate accompanies every panel shipped.
Signed SAT Checklists
Line-by-line verification of every inverter, tracker, MET sensor, and alarm tag — countersigned by the EPC's commissioning lead.
Utility Hand-off
We stay on the line until the utility confirms telemetry is active, accurate, and within tolerance. No early flights home.
Avoid COD delays.
Ensure your plant talks to the grid exactly how the utility expects.