01
Factory & Supplier Audits
Independent assessment of QMS maturity, process controls, personnel competency, equipment, material management, testing, document control, and finished-product handling.
Columbus, Ohio · Serving PV projects nationwide
Catch the defect before it ships.
Sisoko is an independent, US-based set of eyes on your solar modules, from the factory floor to the loading dock. We audit, inspect, and test to your acceptance criteria, then hand you the evidence to accept, hold, or reject a lot with confidence. We sell no modules and certify no factories, so the only interest we protect is yours.
The quality gap
A certificate proves the design. Not today's line.
A lab certificate tells you a module design passed a test once. It says nothing about whether today's production line actually built to that design. That gap is where the money quietly leaks out: material swapped without notice, traceability that falls apart, process drift, calibration that slipped, workmanship waved through, corrective actions that never really closed.
That is the whole reason Sisoko exists. We are not here to hand you a tidy audit score. We are here to find what will actually hurt reliability, delivery, and acceptance, and to write it up plainly enough that your team can act on it the same day.
Independent eyes. Evidence-first reporting. Answers you can act on today.
Core services
Quality assurance across the PV supply chain.
Services can be commissioned individually or combined into a project-specific quality surveillance plan covering supplier qualification, production, shipment, and receiving.
02
Production Process Monitoring
On-site oversight during active production to verify approved BOM, work instructions, control plans, process parameters, in-line inspections, testing, and disposition of nonconforming product.
03
Pre-Shipment Inspection
Lot-based release inspection using agreed acceptance criteria, including visual review, EL image assessment, flash/IV verification, labeling, packaging, and sample traceability.
Why teams call us
The independent, US-based alternative.
The big inspection names also test and certify for the manufacturers, and most of the independents sit half a world away. Sisoko is built differently on purpose.
Genuinely independent
We sell no modules and certify no factories. There is no other client behind the curtain, so there is never a reason to soften a finding.
US-based, on your clock
Most independent inspectors coordinate from Asia. We work in US hours and English, and we can cover the domestic module lines offshore firms struggle to reach.
One lot or one hundred
Flexible, project-based engagements. Bring us a single container inspection, or stand up a full surveillance program across a supplier base, and we scope to fit.
Fast, transparent reporting
Raw EL images, the full IV and flash data, per-defect photos, and the AQL math, delivered promptly and in full, not a sanitized pass or fail PDF.
Project approach
Four quality gates. One chain of evidence.
Inspection works best when findings connect across the project lifecycle. A material traceability gap during production should be visible at release. A shipment defect should be traceable back to process history. Corrective action should close the cause, not just the symptom.
See the full process1
Qualify
Assess supplier capability, QMS controls, factory readiness, certifications, equipment, staffing, and risk before production.
2
Control
Monitor incoming materials, process parameters, workmanship, in-process testing, traceability, and nonconformance handling.
3
Release
Apply agreed sampling and acceptance criteria before shipment, with clear pass, hold, or reject disposition supported by evidence.
4
Verify
Confirm corrective actions and receiving condition, then feed lessons back into supplier controls and future inspection intensity.
On the ground, in the factory, at the panel
Every finding is anchored to something we saw, measured, and recorded, not an opinion, but evidence you can act on.
Independent · Evidence-first · Columbus, Ohio
Who we support
Independent assurance for teams with real exposure.
Solar DevelopersEPC ContractorsIndependent Power ProducersAsset OwnersModule Procurement TeamsManufacturersInvestors & LendersSupplier Quality TeamsProject EngineeringWarehouse & Logistics
Start with the risk
Tell us what you are trying to protect.
Share the project phase, supplier, location, volume, timing, and the quality concern. We can define the inspection scope around the decision you need to make.
Direct line
Talk to an independent PV quality specialist.
Columbus, Ohio · We respond on weekdays and scope your inspection quickly.
Open the full request form