BOR BIOGAS-SOLAR HYBRID PROJECT

Audit Analysis

The Bor Biogas-Solar Hybrid Project is a real, VVB-verified biogas facility in Turkey with a solid combined additionality test, but it is burdened by an unusually high volume of corrective actions (61 CARs), a solar-panel addition that bypassed the design-change process, and a project-specific modeled baseline with no quantified leakage deduction. The ERR figures nearly doubled between validation and verification, and several key MRV parameters remain unreported, leaving meaningful uncertainty about the robustness of the claimed reductions.

Project Description

Red Flags

• ⚠61 Corrective Action Requests and 18 Clarification Requests were raised during verification, indicating substantial initial documentation gaps (verification report, Jan 2026).
• ⚠A 5.33 MWm solar PV array was added to the project without applying the Gold Standard design-change process; the solar electricity generation was excluded from the credit calculation, and the installation was not observed during the site visit (verification report).
• ⚠The methodology is misidentified as ACM0022 (a CDM methodology) in parts of the verification report, creating confusion about which ruleset governs the project.
• ⚠Leakage deduction is 0% on the basis that it is 'deemed negligible,' yet the validation report (Dec 2023) described leakage as 'quantified' — the approach shifted between documents without a clear reconciliation.
• ⚠The claimed ERR nearly doubled from 191,916 tCO₂e at validation (Dec 2023) to 384,357.8 tCO₂e at verification (Jan 2026), a change that is not fully explained in the extracted record.

Credit Vintages