Is LONGi on Sale? November 2026

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Questions and answers

What makes the LR5-54HPB-410M different from other 410W panels?

It uses 108 half-cut monocrystalline cells in an all-black format, so the cells and backsheet read as one dark surface on a roof. Half-cut cells split each cell in two, which lowers resistive losses and improves shade tolerance compared with full-cell designs. The trade-off is a slightly larger frame than some compact 400W panels.

Does LONGi offer a warranty on this panel?

LONGi's standard product warranty for its residential modules is 12 years, with a performance warranty of 25 years. The performance guarantee covers gradual output decline over that period rather than a fixed figure for the whole term. Keep the serial label and installation records, since claims are handled through the seller or LONGi's regional service.

Is the LR5-54HPB-410M good for a small roof?

It suits roofs where a clean all-black look matters and where 410W per panel is enough. Its 108-cell layout is shorter and wider than 144-cell panels, so check rail spacing and roof dimensions before ordering. For maximum watts per square foot, larger-format modules usually win.

When does LONGi run sales?

LONGi sells through distributors and installers rather than direct to homeowners, so promotions vary by reseller and region. Seasonal demand and shipping cycles move distributor pricing more than brand-wide events do. The page tracks each store's price history so you can see how it has moved.

What inverter or system works with this panel?

The panel's voltage and current fit standard string inverters and most microinverters rated for its output range. Have the installer confirm string sizing against the inverter's window, especially in cold climates where voltage rises. Pairing it with optimizers helps if the roof has partial shade.

Are there LONGi discount codes?

Deal.ai checks what LONGi products actually cost at every store, so a real markdown shows on this page as a deal as soon as it starts, and each product's page has its price history to tell a sale from its usual price.