End-to-end solar procurement runs through six stages: define the bill of materials (every component with exact spec, quantity and certification), find and verify suppliers (certification, company documents, factory audit), request and compare quotes on landed cost per watt, agree documents and terms (proforma invoice, Incoterms, payment terms, certifications), arrange payment and financing safely (letter of credit or milestone payments, funded so as to protect working capital), and manage shipping, customs clearance and delivery to site. A good procurement process treats these as one connected flow rather than isolated steps, because a gap at any stage, a vague BOM, an unverified supplier, a wrong document, causes delay and cost downstream.
”- Solar procurement has six connected stages, from defining the BOM to delivery.
- Define the BOM: every component with exact spec, quantity and certification.
- Verify suppliers on certification, company documents and factory audit before ordering.
- Compare quotes on landed cost per watt, not headline price.
- Pay safely (LC or milestones), and finance the order to protect working capital.
Stage 1: Define the bill of materials
Everything starts with a precise bill of materials, the complete itemised list of every component the project needs, with the exact technical specification, quantity and certification requirement for each line. A vague BOM produces quotes you cannot compare and compliance gaps you discover too late. A precise BOM is the foundation of clean procurement, so invest the time to get it right before you talk to a single supplier.
Stage 2: Find and verify suppliers
Identify suppliers who can meet your BOM, then verify them before you go further. Request certification and test reports for the products, company documents (business licence, factory audit, ISO certificates), and, if buying through a trader, the details of the actual factory. Verification filters out the suppliers who cannot deliver, before you invest time in price negotiation.
Stage 3: Request and compare quotes
Send your BOM to verified suppliers and request quotes. When they come back, compare them on landed cost per watt, the true delivered-and-cleared cost, not the headline ex-works or FOB price. Two quotes for the same product can look different on unit price but reverse once freight, duty and clearing are added. Landed cost is the only fair basis for comparison.
Stage 4: Agree documents and terms
Before any money moves, agree the proforma invoice (specs, quantity, price, terms), the Incoterm (who handles freight and insurance), the payment terms, and how certifications and trade documents will be issued. Getting the paperwork right up front prevents the most common and expensive problem: goods that arrive but cannot clear because a document is wrong or missing.
Stage 5: Pay safely and finance the order
Pay in a way that protects you: a letter of credit that releases payment against shipping documents, or staged milestone payments rather than a large advance to an unverified supplier. Where possible, finance the order so you preserve working capital, embedded finance can pay the supplier while you settle on a longer timeline, which also helps you negotiate better prices.
Stage 6: Shipping, clearance and delivery
Finally, manage the physical journey: freight booking, insurance, and above all customs clearance, where most delays happen. Ensure the HSN classification, invoices and certification are correct before the goods arrive so clearance is a formality. Then handle inland transport to site. Treating all six stages as one connected process, rather than isolated tasks, is what separates smooth procurement from a series of expensive surprises.
Quote the whole BOM from one RFQ
VyaparCred lets you post your entire bill of materials as a single RFQ, so verified suppliers across every corridor quote the full list against the same specification.
Post the complete BOM once, and get verified quotes on every line in 24-48h.
Certification status (ALMM, IEC) is confirmed per line before a supplier can quote.
Attach Pre-Shipment Financing to the accepted order and fund up to 100% of the purchase.