LONGi Hi-MO X6 vs Hi-MO 7 — Bifacial vs Monofacial Flagship

Two Flagships, Different Strengths

The LONGi Hi-MO X6 and Hi-MO 7 both use N-type TOPCon cell technology but are designed for different applications. The Hi-MO X6 is a bifacial dual-glass module optimised for ground-mount and commercial installations, while the Hi-MO 7 is a monofacial panel with the industry's highest efficiency for residential and commercial rooftops.

Specification Comparison

Feature	Hi-MO X6	Hi-MO 7
Cell technology	N-type TOPCon	N-type TOPCon (HPBC 2.0)
Design	Bifacial, dual glass	Monofacial, glass-backsheet
Power range (front)	555–590W	560–600W
Module efficiency	Up to 22.6%	Up to 22.8%
Bifaciality	Up to 80%	N/A
Temp. coefficient	−0.30%/°C	−0.29%/°C
Weight	~33 kg (dual glass)	~32 kg
Product warranty	25 years	25 years
Performance warranty	87.4% at year 30	87.4% at year 30
Best application	Ground-mount, utility, elevated commercial	Residential rooftop, flush commercial

When to Choose Hi-MO X6 (Bifacial)

• Ground-mount installations on light-coloured surfaces (sand, gravel, white membrane)
• Elevated commercial rooftop mounts with 1+ metre clearance
• Utility-scale projects where bifacial gain justifies optimised mounting
• Harsh environments where dual-glass durability is important
• Tracking systems (single-axis trackers maximise bifacial gain)

In desert environments with light sand, the Hi-MO X6 can produce 10–20% more energy than the Hi-MO 7 through rear-side capture.

When to Choose Hi-MO 7 (Monofacial)

• Residential rooftops where panels are flush-mounted
• Commercial rooftops with dark surfaces
• Projects where maximum front-side efficiency matters most
• Installations where lighter weight is preferred
• Systems where the 0.2% higher front efficiency provides more benefit than rear-side capture

Total Energy Comparison

For a 100 kW system in the UAE:

Scenario	Hi-MO 7 Annual Yield	Hi-MO X6 Annual Yield	X6 Advantage
Ground-mount, light sand	170,000 kWh	195,000 kWh	+14.7%
Elevated rooftop, white membrane	170,000 kWh	187,000 kWh	+10.0%
Flush rooftop, dark surface	170,000 kWh	174,000 kWh	+2.4%

Frequently Asked Questions

Which panel has better LCOE?

For ground-mount on light surfaces, the Hi-MO X6 has significantly better LCOE due to 10–20% bifacial gain. For flush rooftop installations, the Hi-MO 7 typically wins on LCOE due to its higher front-side efficiency and lower cost.

Can I use Hi-MO X6 on a residential rooftop?

Yes, but the bifacial gain will be minimal on a flush-mount dark rooftop (2–5%). The Hi-MO 7 is a better choice for most residential applications.

Is the Hi-MO X6 more durable?

The dual-glass construction offers superior resistance to moisture, UV, salt mist, and mechanical stress. It is the better choice for harsh environments.