---
title: "Bisol vs AIKO - Brand Comparison | ComparePV"
description: "Compare Bisol vs AIKO solar panels: full portfolio, efficiency, cell technology breakdown, warranty terms and company background."
source: "https://comparepv.com/bisol-vs-aiko"
---

# Bisol vs AIKO

AIKO has the broader catalog (144 vs 12 models). AIKO leads on peak efficiency at 25.20%. AIKO leans bifacial (24% of lineup).


## The two companies


| Attribute | Bisol | AIKO |
| --- | --- | --- |
| Country | Slovenia | China |
| Headquarters | Prebold | Shanghai |
| Founded | 2004 | 2009 |
| Employees | 200-500 |  |
| Annual capacity | \<1 GW/year |  |
| Tier 1 | no | yes |
| Listed |  | SZSE: 600732 |
| Website | [https://www.bisol.com](https://www.bisol.com) | [https://www.aikosolar.com](https://www.aikosolar.com) |

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...


## Catalog & Power


| Measure | Bisol | AIKO | Margin |
| --- | --- | --- | --- |
| Panel Models | 12 | 144 | +132 |
| Max Power | 580 W | 805 W | +225 W |
| Avg Power | 475 W | 581 W | +106 W |


## Efficiency


| Measure | Bisol | AIKO | Margin |
| --- | --- | --- | --- |
| Max Efficiency | 23.50% | 25.20% | +1.70 pp |
| Avg Efficiency | 21.75% | 23.65% | +1.90 pp |


## Reliability & Warranty


| Measure | Bisol | AIKO | Margin |
| --- | --- | --- | --- |
| Avg Temp Coefficient | -0.291%/°C | -0.271%/°C | +0.020 |
| Bifacial Share | 1 (8%) | 35 (24%) | +16 pp |
| Avg Warranty | 29.6 yrs | 29.5 yrs | +0.1 yr |


## Efficiency distribution

AIKO skews to higher efficiency: 85% of lineup is 23%+


| Efficiency band | Bisol | AIKO |
| --- | --- | --- |
| \<20% | 2 (16.7%) | 3 (2.1%) |
| 20-21% | 1 (8.3%) | 3 (2.1%) |
| 22-23% | 5 (41.7%) | 12 (8.3%) |
| 23%+ | 4 (33.3%) | 123 (85.4%) |
| 21-22% | 0 | 3 (2.1%) |


## Power distribution

AIKO offers more 600W+ panels (60% of lineup)


| Power band | Bisol | AIKO |
| --- | --- | --- |
| \<400W | 2 (16.7%) | 2 (1.4%) |
| 400-499W | 4 (33.3%) | 50 (34.7%) |
| 500-599W | 6 (50.0%) | 5 (3.5%) |
| 600-699W | 0 | 78 (54.2%) |
| 700W+ | 0 | 9 (6.2%) |


## Cell technology

Dominant cell tech: **PERC** (58%)

Dominant cell tech: **Back Contact** (83%)


| Technology | Bisol | AIKO |
| --- | --- | --- |
| PERC | 7 (58.3%) | 7 (4.9%) |
| TOPCon | 5 (41.7%) | 0 |
| Back Contact | 0 | 119 (82.6%) |
| N-type | 0 | 17 (11.8%) |
| Flexible | 0 | 1 (0.7%) |


## Top panels, Bisol


| # | Model | Power | Efficiency | Temp. coefficient | Technology |
| --- | --- | --- | --- | --- | --- |
| 1 | [BGO 580](https://comparepv.com/panel/bisol-bgo-580) | 580 | 23.5 | -0.290 | Monocrystalline |
| 2 | [BGO 570](https://comparepv.com/panel/bisol-bgo-570) | 570 | 23.1 | -0.290 | Monocrystalline |
| 3 | [BGO 560](https://comparepv.com/panel/bisol-bgo-560) | 560 | 22.7 | -0.290 | Monocrystalline |
| 4 | [BBO 520](https://comparepv.com/panel/bisol-bbo-520) | 520 | 23.2 | -0.290 | Monocrystalline |
| 5 | [BBO 510](https://comparepv.com/panel/bisol-bbo-510) | 510 | 22.8 | -0.290 | Monocrystalline |
| 6 | [BBO 500](https://comparepv.com/panel/bisol-bbo-500) | 500 | 22.3 | -0.290 | Monocrystalline |
| 7 | [BDO 460](https://comparepv.com/panel/bisol-bdo-460) | 460 | 23.0 | -0.290 | Monocrystalline |
| 8 | [BDO 450](https://comparepv.com/panel/bisol-bdo-450) | 450 | 22.5 | -0.290 | Monocrystalline |
| 9 | [BDO 440](https://comparepv.com/panel/bisol-bdo-440) | 440 | 22.0 | -0.290 | Monocrystalline |
| 10 | [BDO 410](https://comparepv.com/panel/bisol-bdo-410) | 410 | 20.5 | -0.290 | Monocrystalline |


## Top panels, AIKO


| # | Model | Power | Efficiency | Temp. coefficient | Technology |
| --- | --- | --- | --- | --- | --- |
| 1 | [AIKO-A805-GRH78Dw](https://comparepv.com/panel/aiko-aiko-a805-grh78dw) | 805 | 25.1 | -0.260 | Monocrystalline |
| 2 | [AIKO-A800-GRH78Dw](https://comparepv.com/panel/aiko-aiko-a800-grh78dw) | 800 | 24.9 | -0.260 | Monocrystalline |
| 3 | [AIKO-A795-GRH78Dw](https://comparepv.com/panel/aiko-aiko-a795-grh78dw) | 795 | 24.8 | -0.260 | Monocrystalline |
| 4 | [AIKO-A790-GRH78Dw](https://comparepv.com/panel/aiko-aiko-a790-grh78dw) | 790 | 24.6 | -0.260 | Monocrystalline |
| 5 | [AIKO-A785-GRH78Dw](https://comparepv.com/panel/aiko-aiko-a785-grh78dw) | 785 | 24.4 | -0.260 | Monocrystalline |
| 6 | [AIKO-A780-GRH78Dw](https://comparepv.com/panel/aiko-aiko-a780-grh78dw) | 780 | 24.3 | -0.260 | Monocrystalline |
| 7 | [AIKO-A775-GRH78Dw](https://comparepv.com/panel/aiko-aiko-a775-grh78dw) | 775 | 24.1 | -0.260 | Monocrystalline |
| 8 | [AIKO-A770-GRH78Dw](https://comparepv.com/panel/aiko-aiko-a770-grh78dw) | 770 | 24.0 | -0.260 | Monocrystalline |
| 9 | [AIKO-A700-MAE78Dw](https://comparepv.com/panel/aiko-aiko-a700-mae78dw) | 700 | 25.0 | -0.260 | Monocrystalline |
| 10 | [AIKO-A695-MAE78Dw](https://comparepv.com/panel/aiko-aiko-a695-mae78dw) | 695 | 24.9 | -0.260 | Monocrystalline |


## 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.

\---LINKS---

\- https://balkangreenenergynews.com/solar-module-maker-bisol-to-triple-production-capacity-with-new-slovenian-plant/ \| Bisol to triple production capacity with new Slovenian plant \| article

\- https://www.bisol.com/post/bisol-position-statement-bloombergnef-tier-1-list-not-a-measure-of-pv-module-quality \| BISOL position statement - BloombergNEF Tier 1 list not a quality measure \| article

\- https://www.solarquotes.com.au/panels/aiko-solar-review.html \| Aiko Solar panels review - SolarQuotes Australia \| review

\- https://aikosolar.com/en/aiko-achieves-prestigious-tier1-status/ \| AIKO achieves BloombergNEF Tier 1 status announcement \| article

\- https://www.vicoexport.com/en/67499/tier-1-list-of-solar-panel-manufacturers-q2-2026/ \| Tier 1 List of Solar Panel Manufacturers Q2 2026 \| article

Written by claude-sonnet from the figures above.


## Other comparisons

- [Bisol vs A.B. Energy](https://comparepv.com/bisol-vs-a-b-energy)
- [AE Solar vs AIKO](https://comparepv.com/ae-solar-vs-aiko)
- [Bisol vs AEET](https://comparepv.com/bisol-vs-aeet)
- [AKCOME vs AIKO](https://comparepv.com/akcome-vs-aiko)
- [Bisol vs ARTsolar](https://comparepv.com/bisol-vs-artsolar)
- [ASM vs AIKO](https://comparepv.com/asm-vs-aiko)


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Source: https://comparepv.com/bisol-vs-aiko

Not in this file, on the page: the distributions above drawn as charts.