Which solar brand should you choose?

Every claim about a module must appear in the manufacturer's datasheet and warranty terms. These are the parameters to compare across brands before deciding.

• IEC 61215 (performance) and IEC 61730 (safety) certification with valid test reports.
• Cell technology and module efficiency: N-type TOPCon lines currently outperform PERC at the same size.
• Product and performance warranty: check the term, first-year degradation and annual degradation guaranteed.
• Power temperature coefficient — the smaller the better in Vietnam's hot climate.
• Wind and mechanical load ratings, plus salt-mist corrosion class for coastal sites.
• Manufacturer bankability and third-party reliability testing, such as the PVEL scorecard.

• Compliance with IEC 62109 safety standards and the utility's connection requirements.
• Peak and European efficiency, MPPT count and voltage window matched to the string design.
• IP65/IP66 protection, operating temperature range and derating behaviour in heat.
• Protection features: AFCI arc-fault detection, leakage monitoring, export limitation, reactive power control.
• Expandability: BESS-ready, open communication protocols and integration with the monitoring platform.
• Service network and spare-parts stock in Vietnam — this drives how fast a fault is cleared.

Great modules behind an inverter with no local support still lose energy every time you wait for a replacement; assess after-sales service, not just equipment price.

JA Solar is a global PV module manufacturer offering monocrystalline PERC and N-type module lines according to information published on its official website. On commercial rooftops Orca Energy favours the N-type lines for their balance of efficiency, temperature coefficient and warranty terms.

• A broad module portfolio by power class and size, which helps optimise layouts on cluttered factory roofs.
• Long product and performance warranty terms as published by the manufacturer — always check the version applicable to the batch supplied.
• Available supply and distribution channels in Vietnam, shortening procurement lead times on EPC projects.

Specifications and warranty terms are quoted from manufacturer-published documents; project contracts must attach the datasheet of the exact model and batch delivered.

Sungrow is a global inverter and energy storage supplier whose portfolio, as published on its official website, covers string inverters for commercial and industrial projects, floating PV solutions and storage systems.

• A wide three-phase string inverter range that suits factory roofs split across areas and orientations.
• Support for export limitation and the power control functions required when a system may only self-consume.
• A monitoring ecosystem and storage compatibility, useful when the business later adds a BESS.
• Technical and service presence in the Vietnamese market, which shortens fault resolution on operating systems.

Orca Energy is not an exclusive dealer for any brand; the final equipment list follows each project's technical requirements, budget and warranty terms.

• Step 1 – Fix the constraints: roof load, area, orientation, daytime load profile and export limitation requirements.
• Step 2 – Build 2–3 equipment options and simulate yield in PVsyst for each rather than comparing on paper.
• Step 3 – Compare lifecycle cost: equipment price, expected yield, O&M cost and replacement risk.
• Step 4 – Verify certificates, warranty terms and the manufacturer's technical support capability in Vietnam.
• Step 5 – Lock the list and record the exact models and serial numbers in the EPC contract and handover file.