Longi Solar Panels Review: Hi-MO 6 & Hi-MO 7 in Ireland
Longi is the world's largest solar manufacturer by shipment volume and one of the most innovative panel makers on the market. The Hi-MO 6 (HPBC) and Hi-MO 7 (HPBC 2.0) ranges sit at the premium end of the Tier 1 segment. Here is our independent Longi solar panels review for Ireland, including specs, pricing, and how Longi compares to Jinko and JA Solar.
Quick Answer
Longi solar panels are a premium Tier 1 option for Irish homes. The Hi-MO 6 (HPBC) range delivers 22.8% efficiency with a sleek all-black aesthetic, while the new Hi-MO 7 (HPBC 2.0) pushes efficiency above 23%. Longi is the world's largest solar panel manufacturer by shipments and a Bloomberg NEF Tier 1 brand. Expect to pay €150–€180 per panel — slightly more than Jinko but with better aesthetics and class-leading low-light performance.
Who Is Longi?
Longi Green Energy Technology Co. Ltd. (formerly LONGi Solar) is headquartered in Xi'an, China and was founded in 2000. Longi has been the world's largest solar panel manufacturer by shipment volume since 2020, with cumulative module shipments exceeding 300 GW.
Longi pioneered the shift from p-type PERC to mono-crystalline cells in the mid-2010s and led the introduction of HPBC (Hybrid Passivated Back Contact) technology with the Hi-MO 6 in 2023. The Hi-MO 7 (HPBC 2.0), launched in late 2024, pushes cell efficiency above 24%.
2000
Founded
China
Headquarters
Tier 1
Bloomberg NEF
#1
Global shipments
Longi Hi-MO 6 HPBC Specifications
| Specification | Value |
|---|---|
| Model | LR5-54HTH (Hi-MO 6 Scientist) |
| Wattage | 415–435W |
| Cell Technology | HPBC (Hybrid Passivated Back Contact) |
| Efficiency | Up to 22.8% |
| Aesthetics | Full-black, no visible busbars |
| Dimensions | 1722 × 1134 × 30mm |
| Weight | 21.5 kg |
| Temperature Coefficient | −0.29%/°C |
| Product Warranty | 25 years |
| Performance Warranty | 25 years (88.85% at year 25) |
| Degradation Rate | 0.4% per year |
| Tier Status | Bloomberg NEF Tier 1 |
The Hi-MO 6 is Longi's flagship residential panel. The HPBC cell architecture moves all electrical contacts to the back of the cell, leaving the front surface entirely uniform black. This delivers both aesthetic appeal and improved low-light performance — well suited to Irish overcast conditions.
Longi Hi-MO 7 (HPBC 2.0)
The Hi-MO 7 launched in late 2024 with HPBC 2.0 technology. Cell efficiency tops 24% and module efficiency reaches 23.3% for the residential 460W variant. It uses dual-glass construction and a longer 30-year power output warranty.
| Specification | Hi-MO 7 Value |
|---|---|
| Wattage (residential) | 440–460W |
| Cell Technology | HPBC 2.0 |
| Module Efficiency | Up to 23.3% |
| Power Warranty | 30 years (87% output) |
| Year-1 Degradation | 1% |
| Construction | Dual-glass |
Hi-MO 7 is gradually replacing Hi-MO 6 in Longi's residential line-up. Availability in Ireland is growing through 2026, and quotes for either generation should specify the exact module code.
Longi vs Jinko: Which Is Better?
| Feature | Longi Hi-MO 6 | Jinko Tiger Neo |
|---|---|---|
| Wattage | 415–435W | 440W |
| Cell Technology | HPBC (back-contact) | N-type TOPCon |
| Efficiency | Up to 22.8% | 22.3% |
| Product Warranty | 25 years | 25 years |
| Performance Warranty | 25 years (88.85%) | 30 years (87.4%) |
| Degradation | 0.4%/year | 0.4%/year |
| Aesthetics | Full-black, no busbars | All-black available |
| Typical Price (per panel) | €150–€180 | €140–€170 |
Verdict: Longi edges Jinko on efficiency (22.8% vs 22.3%) and aesthetics — the back-contact HPBC cell removes all front-side busbars for a uniform black finish. Jinko offers a longer performance warranty (30 vs 25 years). For pure looks and slightly higher output, Longi wins. For longest warranty terms and broader installer availability in Ireland, Jinko still leads.
Longi Solar Panels: Frequently Asked Questions
Are Longi solar panels good?
Yes. Longi is the world's largest solar panel manufacturer by shipments and a Bloomberg Tier 1 brand. The Hi-MO 6 delivers 22.8% efficiency and the newer Hi-MO 7 reaches 23.3%. Longi panels are a premium choice with class-leading aesthetics and excellent low-light performance for Irish conditions.
Where are Longi solar panels made?
Longi is headquartered in Xi'an, China and panels are manufactured at multiple Longi-owned facilities in China, Vietnam, and Malaysia. All panels meet EU IEC standards and carry CE marking.
Are Longi panels Tier 1?
Yes. Longi has held Bloomberg NEF Tier 1 status for many years and is consistently ranked the world's largest solar panel maker by shipment volume.
Longi vs Jinko: which is better?
Longi has slightly higher module efficiency (22.8% vs 22.3% for Hi-MO 6 vs Tiger Neo) and a sleeker full-black aesthetic thanks to back-contact HPBC cells. Jinko offers a longer 30-year performance warranty vs Longi's 25-year. Both are Tier 1; the choice often comes down to installer availability in Ireland.
What is the difference between Hi-MO 6 and Hi-MO 7?
Hi-MO 6 uses first-generation HPBC technology with up to 22.8% module efficiency. Hi-MO 7 uses HPBC 2.0 with up to 23.3% efficiency, dual-glass construction, and a longer 30-year performance warranty. Hi-MO 7 is gradually replacing Hi-MO 6 in Longi's residential line-up.
How much do Longi solar panels cost in Ireland?
Longi panels typically cost €150–€180 per panel installed. A 10-panel (4.4 kW) system runs approximately €7,000–€9,000 before the SEAI grant. Slightly more expensive than Jinko but cheaper than premium brands like Hyundai or Aiko.
What is HPBC technology?
HPBC (Hybrid Passivated Back Contact) is a cell architecture that places all electrical contacts on the rear of the cell. This eliminates front-side busbars, giving a uniform black appearance and improving low-light absorption — useful for cloudy Irish weather.
See also
Related Guides
Sources
- Longi — Hi-MO 6 & Hi-MO 7 datasheets — longi.com
- Bloomberg NEF — Tier 1 Solar Module Maker List — bnef.com
- SEAI — Solar Energy for the Home — seai.ie
Last updated: April 2026
Fact-checked by John Rooney, Solar Energy Editor. Editorial policy
John Rooney is the founder of Solar Info and has been covering the Irish solar energy market since 2023. He fact-checks all content against official SEAI data and maintains relationships with SEAI-registered installers across Ireland.
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