To assess reliability: check qualifications & review case studies (Source: Dazhong Net); Golden Rule: on-site inspection is the best verification method (Source: Mars); Core Standard: a 10-year accident-free track record (Source: Cubenergy); Note: certifications must be verified by specific model number (Source: ESY).
I. Qualifications and Reputation
Qualifications: comprehensive, official power industry credentials (Source: Dazhong Net);
Construction: capability for independent construction and grid-connection acceptance (Source: Dazhong Net); Subcontracting: check for “license lending” or unauthorized subcontracting (Source: Dazhong Net); Credit: corporate credit and performance history (Source: Dazhong Net); Scale: experience with large-scale projects (Source: Dazhong Net)—Qualifications: credentials, credit, and experience (three key checks).
II.
On-site Inspection
Site: on-site visits provide the best verification (Source: Mars); Production Line: observe the production line in operation during the visit (Source: Mars); Inventory: verify actual stock of battery cells, glass, and EVA (Source: Mars); QC: inspect the quality control laboratory (Source: Mars); Staff: verify actual employee headcount (Source: Mars)—Inspection: production line, inventory, and laboratory (three key observation points).
III. Case Studies & Reputation
References: Request 3–5 recent clients (Source: Heaven); Case Studies: Examples of similar projects (Source: hcctop); Reputation: Client ratings/reviews (Source: Accio); Site Visits: On-site inspections where feasible (Source: Nanning Radio & TV); Progress: High-rated suppliers completing work ahead of schedule (Source: Chasun)—Reputation: References + Case Studies + Site Visits (Three-point evidence).
IV.
Track Record Verification
First: Name, location, and year of the first BESS project (Source: Cubenergy); Longest-running: Oldest fleet still in operation (Source: Cubenergy); 10 Years: “Gold standard” of 10 years without accidents (Source: Cubenergy); Lineage: Traceability of product generations (Source: Cubenergy); Exhibitions: Participation in international trade shows (Source: hcctop)—Track Record: Projects + Fleet + Lineage (Three-point verification).
V.
Red Flags
High-Pressure: “Today-only” pricing and high-pressure sales tactics (Source: Sunollo); Evasion: Refusal to disclose 25-year performance scope (Source: Sunollo); Certificate Stacking: Piling up certificates without explaining safety architecture (Source: copow); Exaggeration: Case studies presented as flawless with no challenges (Source: Chasun); Empty Warehouse: Bare shelves and lack of inventory (Source: Mars)—Red Flags: High-Pressure + Empty Warehouse + Certificate Stacking (Three warnings).
VI. Certification Verification
Model: Verification based on specific model numbers (Source: ESY); List: CEC-approved battery list (Source: ESY); Brand: Brand approval does not extend to other models (Source: ESY); Badge: Verification of supplier badges (Source: Accio); Audit: Request audit reports or video tours (Source: Accio)—Verification: Model-level + List + Badge (three-tier approach).
VII.
Procurement Recommendations
First, check qualifications (power industry licenses); second, review case studies (3–5 clients); third, visit the site (production lines and inventory); fourth, verify track record (10 years of projects);
fifth, identify red flags (e.g., high-voltage equipment with empty inventory)—Assessing reliability: Qualifications + Case Studies + Site Visit (three-point closed-loop verification).
