LONGi Solar Review (Philippines): The World's Largest Panel Maker, Now With N-Type Efficiency

LONGi is the world’s largest solar module maker by shipments and Wood Mackenzie’s top-ranked manufacturer for 2026, and its Hi-MO 6 and Hi-MO 7 lines back that scale up with genuinely strong efficiency and an eight-time PVEL “Top Performer” reliability record. It’s one of the easiest Tier-1 brands to justify on paper — the harder part in the Philippines is confirming exactly who’s selling it to you.

Local availability

LONGi panels are sold in the Philippines through distributors and installers such as Solar World PH, and the Hi-MO series shows up regularly in Metro Manila, Cebu, and Davao installer catalogs. That said, LONGi doesn’t have one clearly designated national residential distributor the way Jinko does through Solar Grid Alternatives — availability here is more “ask your installer which generation they’re quoting” than a single traceable channel. Before you buy, confirm the specific Hi-MO model and generation, and ask for proof the seller sources from an authorized channel rather than gray-market import.

Efficiency and warranty

Hi-MO 6 uses first-generation HPBC (back-contact) cell technology and reaches up to about 22.8% module efficiency, with a 25-year linear power warranty guaranteeing roughly 84.8% of nameplate output at year 25. Hi-MO 7 is the newer N-type line: cell efficiency tops 24%, module efficiency reaches around 23.3% on the residential 460W variant, and it carries a longer 30-year power warranty with degradation capped at 0.4% a year. Hi-MO 7’s higher bifacial ratio (roughly 80%) and better temperature coefficient (-0.28%/°C) also mean it holds output better in the kind of heat Philippine rooftops see. Product (defects) warranty terms vary by line, running roughly 12-15 years — shorter than the 25-year performance warranty, so read the datasheet for your specific model rather than assuming one number covers everything.

LONGi backs this up independently: it won Kiwa PVEL’s “Top Performer” reliability award for the eighth time in 2025, one of only three module types to hit top marks across every reliability test that year.

Price

Panels in this class typically run roughly ₱7,000 to ₱13,000 per unit through Philippine installers, in the same neighborhood as other Tier-1 brands — LONGi doesn’t command a large premium over Jinko or Trina despite the stronger efficiency numbers on Hi-MO 7. Always ask for a current, itemized quote; these figures move with wattage, generation, and installer margin.

Where it falls short

The lack of one clear, marketed residential distributor is the main practical drawback — you’ll need to do more legwork verifying an installer’s sourcing than you would with a brand that names its Philippine partner outright. The shorter product (defects) warranty on some Hi-MO 6 variants versus the full 25-year performance warranty is also worth flagging with your installer, since a shorter defects window matters if something fails mechanically in year 10.

Who it’s best for

Buyers who want genuinely best-in-class efficiency and an independently verified reliability record, and who are willing to press their installer for the exact model, generation, and sourcing paperwork rather than taking “LONGi panels” at face value. Compare warranty terms against Jinko Solar and read our tier-1 vs tier-2 guide and warranties explained guide before signing a quote. For the full brand lineup, see our best solar panel brands guide and panel brand roundup.