JA Solar vs Tongwei Solar
JA Solar vs Tongwei Solar β Side-by-side comparison of flagship series, max power, efficiency, warranty, and best-fit use cases. Request quotes from JUST SOLAR.
BRAND A
JA Solar
Tier-1 specialist in high-power residential/commercial
Head-to-head specs
635W Β· 22.7%
2025
55+ GW
BRAND B
Tongwei Solar
World's #1 solar cell maker, rapidly growing in modules
Head-to-head specs
720W Β· 23.5%
2025
50+ GW
Head-to-head specs
| JA Solar | Tongwei Solar | |
|---|---|---|
| Tier | Tier 1 | Tier 1 |
| 2025 Shipments | 55+ GW | 50+ GW |
| Flagship Series | DeepBlue 4.0 Pro | TWMND / TNC |
| Technology | TOPCon N-type | TOPCon N-type |
| Max Power | 635W | 720W |
| Max Efficiency | 22.7% | 23.5% |
| Warranty | 12yr product / 30yr power | 12yr product / 30yr power |
| Founded | 2005 | 2013 |
| Headquarters | Beijing | Chengdu |
| Country | China | China |
JA Solar
Key strengths
- βTier-1 brand recognition
- βStrong residential channel
- βCompetitive pricing
- βVertically integrated
- βRobust quality control
Tongwei Solar
Key strengths
- βWorld #1 solar cell + polysilicon producer
- βUltra-deep vertical integration
- βAggressive pricing (full chain cost advantage)
- βRapidly expanding module capacity
- βHigh-efficiency TNC TOPCon cells
JA Solar β Best fit
Residential, small C&I, emerging markets
Tongwei Solar β Best fit
Cost-sensitive large projects, buyers valuing cell-quality traceability, large-scale utility
π Verdict
On efficiency, Tongwei Solar leads (23.5%). For peak wattage, Tongwei Solar offers the higher ceiling (720W). Choose JA Solar if your project matches: Residential, small C&I, emerging markets. Choose Tongwei Solar if: Cost-sensitive large projects, buyers valuing cell-quality traceability, large-scale utility.
πΌ Ready to buy?
JUST SOLAR is an authorized distributor for both brands. Get a side-by-side quote with live FOB pricing and stock availability.