JA Solar — China
JAM 390W C HD
The JA Solar JAM 390W C HD is a 390W N-Type TOPCon solar panel with 19.0% efficiency. Backed by a 25-year warranty.
Standard TierFEOC: Restricted
390W
Wattage
19%
Efficiency
N-Type TOPCon
Cell Type
25 years
Warranty
Full Specifications
- Brand
- JA Solar
- Model
- JAM 390W C HD
- Series
- JAM
- Wattage
- 390W
- Module Efficiency
- 19%
- Cell Type
- N-Type TOPCon
- Dimensions
- 65-67" x 39-40"
- Weight
- 44 lbs
- Warranty
- 25 years
- Est. Price Per Watt
- $1.80
- Est. 7kW System Cost
- $12,600
- Est. 10kW System Cost
- $18,000
- Temperature Coefficient
- -0.25%/°C
- Bifacial
- No
- Origin
- China
- FEOC Status
- fail
Other JA Solar Panels
| Model | Wattage | Efficiency | Cell | $/W |
|---|---|---|---|---|
| JAM 485W D | 485W | 22.8% | N-Type TOPCon | $2.69 |
| JAM 480W C All-Black | 480W | 22.6% | PERC | $2.64 |
| JAM 470W B BF | 470W | 22.2% | N-Type TOPCon | $2.55 |
| JAM 470W E Pro | 470W | 22.2% | PERC | $2.55 |
| JAM 465W A HC | 465W | 22% | PERC | $2.50 |
Similar Wattage Panels (Competitors)
| Panel | Wattage | Efficiency | $/W |
|---|---|---|---|
| Panasonic HIT 420W D Plus | 420W | 22.3% | $4.08 |
| Panasonic HIT 420W A Ultra | 420W | 22.3% | $4.08 |
| SunPower Maxeon 420W B Silver | 420W | 22.2% | $4.21 |
| Maxeon 3-42 HC | 420W | 22.1% | $3.98 |
Frequently Asked Questions
How much does a 390W JA Solar JAM 390W C HD cost?
The JA Solar JAM 390W C HD costs approximately $702 per panel ($$1.80/W). A typical 7kW system using this panel would cost around $12,600 before incentives.
⚠ The 30% federal solar tax credit has ended — Section 25D expired December 31, 2025, and the Section 48E construction-start deadline passed July 4, 2026.
Selecting 30% ITC assumes you began construction before this deadline. Most new purchases no longer qualify.Learn about your options after the deadline →
Is the JA Solar JAM 390W C HD a good solar panel?
The JA Solar JAM 390W C HD has 19% efficiency and a 25 years warranty, placing it in the standard tier. This is a solid mid-range panel suitable for most residential installations.
How many JA Solar JAM 390W C HD panels do I need?
For a typical 7kW residential system, you'd need approximately 18 panels. For a 10kW system, plan for about 26 panels. The exact number depends on your roof space, energy usage, and local sun hours.