ET Solar vs JA Solar - solar panel manufacturer comparison

ET Solar and JA Solar are both Chinese photovoltaic module manufacturers founded in 2005, yet they occupy vastly different positions in the global solar industry. JA Solar has scaled into one of the world's leading PV producers, employing over 37,000 people and operating production capacity exceeding 100 GW. Its shares are publicly traded on the Shenzhen Stock Exchange (SZSE), and it holds Tier 1 bankable status recognized by both Bloomberg New Energy Finance and S&P Global Commodity Insights - reinforcing its financial resilience and market credibility. ET Solar is a considerably smaller manufacturer without Tier 1 status, with an estimated cumulative shipment of over 7.2 GW since founding and a current catalog of just 10 panel models. The portfolio gap is stark: JA Solar lists 524 models spanning up to 740 Wp and a peak efficiency of 24.4%, while ET Solar's lineup tops out at 555 Wp and 21.4% efficiency.

JA Solar's technology breadth is a key differentiator - its portfolio blends PERC modules (approximately 52% of the lineup) with newer TOPCon-based series such as the Deep Blue 4.0, making it well suited for residential rooftop installs, commercial and industrial (C&I) projects, and large-scale utility ground-mount applications. Its average temperature coefficient of -0.3226%/°C is slightly more favorable than ET Solar's -0.34%/°C, an incremental but real advantage in markets with wide seasonal temperature variation. ET Solar's entire current lineup relies on PERC technology, delivering a uniform portfolio with an average module power of 542.5 Wp and average efficiency of 20.99%. This consistency can be an asset for installers who prefer standardized procurement and a well-understood cell technology for residential or light-commercial rooftop projects. Both manufacturers offer average warranties approaching 28 years, in line with current industry norms.

For international buyers evaluating the two, JA Solar's Tier 1 bankable status is a decisive practical advantage - most project lenders and EPCs require it as a baseline condition for financing approval. JA Solar also provides broader global distribution, more robust after-sales infrastructure, and a wider technology range suitable for virtually any project type. ET Solar may remain a viable option for buyers with specific PERC-only requirements and where Tier 1 status is not a financing prerequisite, but its smaller market footprint introduces meaningful supply-chain and warranty-support risk by comparison.

Generated by Claude Sonnet · 2026-05-13