External audit findings regarding basic work permits on solar plants often highlight significant gaps in procedural compliance and safety management. Common findings focus on the lack of Lockout-Tagout (LOTO), inadequate risk assessments for specialized tasks, and poor document control. 

Key audit findings typically fall into the following areas:

1. Permit-to-Work (PTW) System Deficiencies

Permit Issuance Delays: Issuers are overloaded with high volumes of permits in short timeframes, preventing adequate pre-job inspection.

Missing Signatures/Validations: Lack of joint site checks between the permit issuer and executor.

Expired Permits: Work continuing after the valid time period, often caused by poor tracking of daily extensions.

Lack of Specificity: Generic descriptions of work rather than detailed, task-specific information 

2. High-Risk Work Violations

Electrical Isolation (LOTO): Improper implementation of Lockout-Tagout during O&M, failure to verify dead systems, and lack of authorized personnel for isolation.

Work at Height: Lack of proper permits, lack of safety harnesses, and improper scaffolding inspection tags (Scafftags) on rooftop or elevated structures.

Confined Space Entry: Unauthorized entry into transformer pits, inverter housings, or cable trenches without required monitoring equipment.

3. Procedural and Documentation Gaps

Inadequate Hazard Identification (HIRA): Failure to identify site-specific hazards such as high DC voltage during sunny days or heatstroke risks during summer.

Contractor Compliance: Subcontractors working without proper training or awareness of the site-specific permit system.

Emergency Procedures: Emergency plans are not documented or linked to the work permits. 

Common Audit Recommendations

Implement a digital permit-to-work system to manage volume, track expiration, and maintain digital signatures.

Conduct frequent, random spot checks on site during high-risk tasks.

Enforce mandatory pre-job safety briefings and ensure contractors sign PTW documents.