Longi Solar vs Resun Solar - solar panel manufacturer comparison

Longi Solar, headquartered in Xi'an, China, was founded in 2000 and grew from a niche monocrystalline wafer supplier into one of the world's largest PV module manufacturers, with annual production capacity in the tens of gigawatts. The company has repeatedly retained Tier 1 status on BloombergNEF's list through 2025, reflecting strong project bankability, and it invests heavily in cell R&D, holding recent world-record lab efficiencies with its HPBC/HIBC back-contact technology. Resun Solar, established in 2005 and based in Changzhou, Jiangsu, operates on a much smaller scale, with annual capacity reported in the low single-digit gigawatts, and it does not appear on the major BloombergNEF Tier 1 rankings alongside global leaders - making Longi's institutional footprint and financing credibility clearly stronger.

Longi's product range centers on its Hi-MO series, built on N-type TOPCon and proprietary HPBC cell technology, serving residential rooftops, commercial and industrial (C&I) installations, and utility-scale ground-mount projects, and it is frequently the module of choice for institutional investors and banks underwriting large developments. Resun Solar focuses on TOPCon panels roughly in the 420-590 W range, including bifacial variants, and positions itself as a cost-competitive supplier typically favored by smaller installers, regional distributors, and residential or small commercial jobs rather than large financed portfolios.

For a typical international buyer, especially one needing bank or insurer sign-off on a project, Longi Solar is the safer default given its established brand, long supply track record, and confirmed Tier 1 status. Resun Solar can be a reasonable choice where price is the primary driver and formal bankability requirements are less strict, but the two brands are not fully interchangeable in terms of market recognition and financing acceptance.

Generated by Claude Sonnet 5 · 2026-07-29