01
The contract names LONGi
Source the exact named product through an accepted channel unless the decision owner gives written substitution approval.
Compare the evidence, not the label
JUSTSOLAR or LONGi? An order-specific buyer guide
If a tender names LONGi, follow that requirement or obtain written approval for an alternative. If the brand is not fixed, compare the exact model, certificate holder, factory, warranty issuer, traceability and commercial order rather than assuming one supplier is universally better.
Start qualified RFQ
JUSTSOLAR is not affiliated with or endorsed by LONGi. JUSTSOLAR has NDA-protected OEM manufacturing experience for established Tier 1 brands, but customer names are not published and that experience does not transfer another company's listing, brand, warranty, evidence or lender acceptance to JUSTSOLAR.
Choose the correct procurement path
The written tender, lender and approved-substitution rules come before a general brand comparison.
02
The contract allows an approved equal
Ask who approves alternatives and which technical, legal, quality and commercial evidence must be matched.
03
The order is OEM or private label
Separate brand owner, legal seller, manufacturer, factory, certificate holder and warranty issuer in writing.
04
No brand is prescribed
Compare evidence for the exact offers. Do not infer performance, price, delivery or bankability from labels alone.
Six questions replace an unsupported ranking
Record both offers against the same requirement and keep missing or mismatched evidence visible.
What does the buyer require?
LONGi: Named-brand clause, approved channel, current Tier 1 clause and substitution rule
JUSTSOLAR: Written acceptance route and exact proposal scope
Which product is offered?
LONGi: Model code, current datasheet, nameplate and allowed substitutions
JUSTSOLAR: Proposed model, datasheet revision, nameplate and bill-of-materials boundary
Do the certificates match?
LONGi: Holder, model family, factory, report, revision and destination
JUSTSOLAR: The same fields matched to the exact proposed product
Can the shipment be traced?
LONGi: Authenticity or authorized-channel evidence, serials and shipment records
JUSTSOLAR: Factory, batch, inspection and release records available for the order
Who carries the warranty?
LONGi: Current warranty issuer, covered model, activation and claim route
JUSTSOLAR: Order-specific issuer, document, conditions and claim route
What is commercially accepted?
LONGi: Current seller offer, availability, delivery scope and payment terms
JUSTSOLAR: Only the Frank or Director reviewed offer or PI defines accepted terms
Five details start a useful comparison
These details let the supply team review fit before discussing a model, evidence pack or formal offer.
- 01
Buyer type
Distributor, installer, EPC, agent, project owner or system integrator
- 02
Country
Destination market and any tender, lender or authority context
- 03
Product
Full-container modules, OEM/private label, small modules, cells or selected components
- 04
Quantity
Pieces, container count, MW requirement or phased plan
- 05
Destination port / site
Named port, project site or requested delivery place
Official source boundaries
Use current official documents. These links do not prove that a seller, model, factory or order is accepted for your transaction.
LONGi Support and Knowledge HubOfficial LONGi product resources. Match the exact datasheet, certificate, installation and warranty document to the offer.LONGi PV Module AuthenticityOfficial LONGi verification resource. Apply it only to the relevant product, serial, document or factory scope.BloombergNEF Tier 1 ReportsBNEF publishes Tier 1 lists quarterly and bases module criteria on project and asset-finance data. Verify the applicable quarter and clause.IEC 61215-2:2021Design-qualification test procedures. Certificate and report scope still need exact model and factory matching.IEC 61730-1:2023PV module construction requirements for safe operation. Destination rules can add requirements.IEC 62941:2019A manufacturing quality-system framework for controlling product, process and material consistency.
Brand comparison questions
Is JUSTSOLAR the same as LONGi?
No. They are separate businesses. This page does not claim identical products, quality, certificates, warranty, ownership or commercial terms.
Is JUSTSOLAR affiliated with LONGi?
No affiliation or endorsement is claimed. NDA-protected OEM experience does not permit customer-name disclosure or transfer another company's status.
Does this page confirm a current Tier 1 listing?
No. BNEF updates its reports quarterly. Verify the applicable report, legal manufacturer and contract wording for the transaction.
What if the tender names LONGi?
Follow the tender unless its decision owner provides a written approved-equal or substitution route.
Can a certificate list prove the two offers are equivalent?
No. Match holder, model family, factory, report, revision, bill of materials and destination requirements for each exact offer.
What should I send to compare an alternative?
Send buyer type, country, product, quantity and destination port or site, plus the named-brand clause and required evidence list.
Request an order-specific alternative review
Send the five RFQ details and the exact LONGi or approved-equal requirement. Frank or the Director reviews supply fit before any product, availability, evidence, price, payment, delivery, warranty, formal offer or PI is accepted.
Start qualified RFQ