Bisol vs AIKO - solar panel manufacturer comparison
AIKO has the broader catalog (144 vs 12 models). AIKO leads on peak efficiency at 25.20%. AIKO leans bifacial (24% of lineup).
Both catalogues are read from the manufacturers' own datasheets. A brand is not scored against the market here, only against the other brand on this page.
The two companies
BISOL Group is a European manufacturer of high-quality photovoltaic modules headquartered in Prebold, Slovenia. Founded in 2004, it is considered Europe's leading authentic solar module producer with a production capacity of 750 MW and products distributed in over 120 countries. The company operates debt-free and has...
- Founded
- 2004
- Headquarters
- Prebold, Slovenia
- Annual capacity
- <1 GW/year
- Employees
- 200-500
- Founded
- 2009
- Headquarters
- Shanghai, China
- Listed
- SZSE: 600732
- Tier 1 bankable
- Yes
Catalogue against catalogue
An average over a catalogue describes the range a manufacturer publishes, not the module you would buy. A brand with two flagship panels and eighty older ones averages worse than one that has retired its back catalogue.
What each of them builds
AIKO skews to higher efficiency: 85% of lineup is 23%+
AIKO offers more 600W+ panels (60% of lineup)
Dominant cell tech: <strong>PERC</strong> (58%)
Dominant cell tech: <strong>Back Contact</strong> (83%)
The flagships
Written summary
Bisol is a Slovenian manufacturer founded in 2004 and headquartered in Prebold, Slovenia. It describes itself as Europe's largest authentic producer of solar modules, with a production capacity of roughly 750 MW per year and exports reaching more than 140 countries. Bisol is not on the BloombergNEF Tier 1 list - in fact, the company has publicly argued that this list is not a meaningful measure of module quality - and it positions its case around European build standards and independent technical certifications instead. AIKO, formally Zhejiang Aiko Solar Technology Co., Ltd., was founded in 2009 in China and has scaled aggressively: its rated production capacity was reported at roughly 20 GW in early 2025 and approximately 35.5 GW by mid-2026. AIKO achieved BloombergNEF Tier 1 status in Q3 2024 and now ranks among the top ten manufacturers globally by annual output. On institutional scale and bankability, AIKO has the clearly stronger footprint.
Bisol's current lineup is built around TOPCon cell technology and emphasizes durability - notably 3.2 mm toughened glass and a claimed degradation rate of 0.5% per year, well below the typical industry ceiling. The company backs this with a 25-year 100% output power guarantee, which is unusual in the market. Its panels target quality-conscious residential and commercial buyers in Europe. AIKO's product range is broader, spanning the Neostar, Comet, and Stellar series and covering residential rooftops, commercial installations, and utility-scale ground mounts. The company's core differentiator is its N-type ABC (All Back Contact) cell architecture, which eliminates front-side metal contacts and has reached commercial module efficiencies of up to 25%.
For most buyers outside Europe, AIKO is the more practical default in 2025: it offers Tier 1 bankability, leading-edge ABC cell technology, and a supply chain capable of serving large-scale projects. For European residential or commercial buyers who prioritise locally manufactured panels, a strong output guarantee, and rigorous European quality documentation, Bisol is a well-regarded niche choice. The two brands occupy different market tiers and are not readily interchangeable.
Generated by Claude Sonnet · 2026-06-09
Other brand comparisons
Shop prices: See 12 Bisol offers · See 179 AIKO offers
Comparisons are computed from manufacturer datasheets held in the ComparePV database and may not reflect a brand's complete current lineup. Nothing on this page is paid placement.