Solar panels are an electrical product where certification, bankable warranties and traceable origin matter more than the headline wattage. Import rules, grid-connection approvals and trade measures differ by country, so confirm them before you order a container.
Polish IT and electronics distributor with a B2B wholesale platform and data feeds
US wholesale solar distributor selling panels by the pallet to installers and resellers
Solar equipment distributor for installers, with over 100 US locations
A panel's datasheet shows rated power, efficiency, voltage, current, temperature coefficient and dimensions. Rated power is measured under standard test conditions, so real output depends on heat, shading and angle. Ask for the datasheet and compare panels on efficiency, temperature behaviour, degradation rate and physical size, not just the power figure. Cell technology, such as monocrystalline variants, affects performance and price, as do cell layout and glass type. Bifacial panels collect light from the rear and only pay off on suitable mounting surfaces.
Panels are expected to be tested to international safety and performance standards from the IEC series, and many markets and installers require certificates for grid-connected installations. Some countries require listing on approved product lists to qualify for incentives or grid connection, and North America has its own listing requirements. Check the rules for your market, and ask for test certificates from an accredited lab, checking that they name the exact model and factory. Fake or mismatched certificates are a known problem.
Panels are expected to last for decades, so the supplier's strength matters. Two warranties apply, one for product defects and one for power output over time. Ask who stands behind them and whether the manufacturer will be around, and how claims are handled in your country. A warranty from a company with no local presence is hard to use. Installers and finance providers may only accept panels from manufacturers they consider reliable.
Solar panels are subject to tariffs, anti-dumping duties, origin documentation and forced-labour import rules in some regions. Rules change, and some customs authorities detain shipments that cannot show supply chain traceability. Check the rules for your market, and ask for origin documents, including where cells and polysilicon came from. This is not a detail to leave until the container is at the port.
Beware of lower-grade or second-hand panels sold as new. Ask for panel grade, flash test reports for batches, and whether panels are tier-labelled or surplus. Pallets are shipped in fixed counts, and a container holds a set number of pallets, so order sizes are usually pallet or container multiples. Handling damage such as micro-cracks may not be visible, so ask about inspection and electroluminescence imaging for important orders.
Prices and margins
Panel prices move with raw material costs and supply, and they fall over time as technology improves, so large inventory held for a long time can lose value. Margins on panels are usually thin because the product is compared by price per watt, and installers and project buyers negotiate hard. Better margins sit in complete kits, mounting systems and service.
Seasonality
Demand follows installation seasons and incentive schedules, and policy changes can swing orders suddenly.
What to ask a supplier
Expect test certificates to the standards required in your market, from an accredited laboratory, naming the exact model and factory. Check the rules for your market, because grid connection and incentives can depend on listing.
Look at both the product and the power output warranty, and ask who honours them in your country. A warranty from a company with no local presence can be difficult to claim.
Some regions apply duties, origin documentation or forced-labour import checks. Check the rules for your market and get origin documents for cells and modules before you ship.
Only if it suits your customers and is clearly described as such. Ask for grade, test data and warranty terms, and be wary of used or lower-grade panels sold as new.
WholesalersCatalog currently lists 7 suppliers for this search. Each profile shows a Trust Score, so you can see what has been checked before you get in touch.
The largest groups are in United States (5), Belgium (1) and Poland (1).
Among suppliers that publish a minimum order, the lowest is no minimum and the median is no minimum. Minimums can vary by product, so confirm them with the supplier.
Check the company registration and street address, ask for trade references and start with a sample or small order. Be careful with suppliers who only accept untraceable payment methods. The Trust Score on each profile shows which of these signals we could confirm.
