Solar equipment is expensive and it stays on your roof for decades. Unfortunately, copies, relabelled products and old stock sold as new exist in many markets. A few simple checks do not remove all risk, but they reduce it a great deal.
Key takeaways
- Buy from the manufacturer's authorised distributor or a company that can prove its supply chain.
- Match the model and serial numbers on the product, the box, the datasheet and the invoice.
- Be careful of a price far below the market without a clear explanation.
- Get the warranty and the datasheet in writing, naming the exact model.
1. Ask where it comes from
Ask which distributor or importer supplied the equipment, and whether the installer is authorised by the brand. Most reputable manufacturers list authorised partners on their websites or will confirm one if you ask. An installer who cannot tell you the supplier is a concern.
2. Check the labels and serial numbers
Every panel and inverter has a label with the model, the rating and a serial number. The numbers on the label, on the carton and on the paperwork should agree. The label should be neat, with consistent printing and no signs of being replaced. Some makers let you check a serial number on their website or app.
3. Compare with the datasheet
The weight, size, connector type and ratings on the real product should match the datasheet. A panel that is lighter or thinner than the datasheet says, or an inverter with a different case, may not be what it claims. Learn what to look for in how to read a solar panel datasheet.
4. Look at the condition
Check for scratches, bent frames, cracks and dirt, and for signs of old stock such as faded cartons or dust. Panels should be delivered on pallets with original packaging and handled with care. Batteries and inverters should come sealed.
5. Be careful with the price
If one quotation is much cheaper for the "same" brand, ask why. There can be good reasons, such as a different stock, but a very low price may mean an older model, a lower grade or a copy. Our guide on how to compare solar quotations shows how to ask.
6. Keep the paperwork
Keep the invoice with model and serial numbers, the warranty card and any import or distributor documents. They help with warranty claims and with resale. See solar panel warranty explained.
Next step
You can ask us for the brand, the model and the supplier for every item in our quotation; request one through the quotation form.
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