LONGi Solar — China
Hi-MO 7 390W A
The LONGi Solar Hi-MO 7 390W A is a 390W PERC solar panel with 19.3% efficiency. Backed by a 25-year warranty.
Standard TierFEOC: Restricted
390W
Wattage
19.3%
Efficiency
PERC
Cell Type
25 years
Warranty
Full Specifications
- Brand
- LONGi Solar
- Model
- Hi-MO 7 390W A
- Series
- Hi-MO 7
- Wattage
- 390W
- Module Efficiency
- 19.3%
- Cell Type
- PERC
- Dimensions
- 65-67" x 39-40"
- Weight
- 44 lbs
- Warranty
- 25 years
- Est. Price Per Watt
- $1.88
- Est. 7kW System Cost
- $13,160
- Est. 10kW System Cost
- $18,800
- Temperature Coefficient
- -0.35%/°C
- Bifacial
- No
- Origin
- China
- FEOC Status
- fail
Other LONGi Solar Panels
| Model | Wattage | Efficiency | Cell | $/W |
|---|---|---|---|---|
| Hi-MO 480W D | 480W | 22.1% | N-Type TOPCon | $2.67 |
| Hi-MO X 480W D | 480W | 22.1% | N-Type TOPCon | $2.67 |
| Hi-MO 5 480W D | 480W | 22.1% | N-Type TOPCon | $2.67 |
| Hi-MO 6 480W D | 480W | 22.1% | N-Type TOPCon | $2.67 |
| Hi-MO 7 480W D | 480W | 22.1% | N-Type TOPCon | $2.67 |
Similar Wattage Panels (Competitors)
| Panel | Wattage | Efficiency | $/W |
|---|---|---|---|
| Panasonic EverVolt 420W A Ultra | 420W | 22.3% | $4.08 |
| Panasonic EverVolt 420W D Plus | 420W | 22.3% | $4.08 |
| Panasonic EverVolt VK 420W A Ultra | 420W | 22.3% | $4.08 |
| Panasonic EverVolt VK 420W D Plus | 420W | 22.3% | $4.08 |
Frequently Asked Questions
How much does a 390W LONGi Solar Hi-MO 7 390W A cost?
The LONGi Solar Hi-MO 7 390W A costs approximately $733 per panel ($$1.88/W). A typical 7kW system using this panel would cost around $13,160 before incentives.
⚠ The 30% Federal Solar Tax Credit (48E/ITC) expired 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 LONGi Solar Hi-MO 7 390W A a good solar panel?
The LONGi Solar Hi-MO 7 390W A has 19.3% 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 LONGi Solar Hi-MO 7 390W A 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.