---
title: "A.B. Energy vs Just Solar - Brand Comparison | ComparePV"
description: "Compare A.B. Energy vs Just Solar solar panels: full portfolio, efficiency, cell technology breakdown, warranty terms and company background."
source: "https://comparepv.com/a-b-energy-vs-just-solar"
---

# A.B. Energy vs Just Solar

Just Solar has the broader catalog (42 vs 0 models). Just Solar leans bifacial (17% of lineup).


## The two companies


| Attribute | A.B. Energy | Just Solar |
| --- | --- | --- |
| Country | Germany |  |
| Headquarters | Wiesbaden |  |
| Founded | 1996 |  |
| Employees | 1,400 |  |
| Annual capacity |  |  |
| Tier 1 |  | no |
| Listed | Xetra, Frankfurt Stock Exchange: AB9 |  |
| Website | [https://abo-energy.com](https://abo-energy.com) |  |

ABO Energy is a renewable energy company that develops and constructs renewable energy projects, focusing on wind, solar, and storage facilities. They offer turnkey solutions and have connected several gigawatts of nominal output to the grid. The company is active internationally and is committed to driving the energy...


## Catalog & Power


| Measure | A.B. Energy | Just Solar | Margin |
| --- | --- | --- | --- |
| Panel Models | 0 | 42 | +42 |
| Max Power | 0 W | 740 W | +740 W |
| Avg Power | 0 W | 491 W | +491 W |


## Efficiency


| Measure | A.B. Energy | Just Solar | Margin |
| --- | --- | --- | --- |
| Max Efficiency | - | 23.82% |  |
| Avg Efficiency | - | 22.08% |  |


## Reliability & Warranty


| Measure | A.B. Energy | Just Solar | Margin |
| --- | --- | --- | --- |
| Avg Temp Coefficient | - | -0.306%/°C |  |
| Bifacial Share | 0 (0%) | 7 (17%) | +17 pp |
| Avg Warranty | - | 28.5 yrs |  |


## Efficiency distribution

Just Solar skews to higher efficiency: 33% of lineup is 23%+


| Efficiency band | A.B. Energy | Just Solar |
| --- | --- | --- |
| 20-21% | 0 | 8 (19.0%) |
| 21-22% | 0 | 14 (33.3%) |
| 22-23% | 0 | 6 (14.3%) |
| 23%+ | 0 | 14 (33.3%) |


## Power distribution

Just Solar offers more 600W+ panels (17% of lineup)


| Power band | A.B. Energy | Just Solar |
| --- | --- | --- |
| \<400W | 0 | 7 (16.7%) |
| 400-499W | 0 | 21 (50.0%) |
| 500-599W | 0 | 7 (16.7%) |
| 700W+ | 0 | 7 (16.7%) |


## Cell technology

Dominant cell tech: **TOPCon** (52%)


| Technology | A.B. Energy | Just Solar |
| --- | --- | --- |
| TOPCon | 0 | 22 (52.4%) |
| Back Contact | 0 | 13 (31.0%) |
| HJT | 0 | 7 (16.7%) |


## Top panels, Just Solar


| # | Model | Power | Efficiency | Temp. coefficient | Technology |
| --- | --- | --- | --- | --- | --- |
| 1 | [JST-FCMH-740W-HD](https://comparepv.com/panel/just-solar-jst-fcmh-740w-hd) | 740 | 23.8 | -0.260 | Monocrystalline |
| 2 | [JST-FCMH-735W-HD](https://comparepv.com/panel/just-solar-jst-fcmh-735w-hd) | 735 | 23.7 | -0.260 | Monocrystalline |
| 3 | [JST-FCMH-730W-HD](https://comparepv.com/panel/just-solar-jst-fcmh-730w-hd) | 730 | 23.5 | -0.260 | Monocrystalline |
| 4 | [JST-FCMH-725W-HD](https://comparepv.com/panel/just-solar-jst-fcmh-725w-hd) | 725 | 23.3 | -0.260 | Monocrystalline |
| 5 | [JST-FCMH-720W-HD](https://comparepv.com/panel/just-solar-jst-fcmh-720w-hd) | 720 | 23.2 | -0.260 | Monocrystalline |
| 6 | [JST-FCMH-715W-HD](https://comparepv.com/panel/just-solar-jst-fcmh-715w-hd) | 715 | 23.0 | -0.260 | Monocrystalline |
| 7 | [JST-FCMH-710W-HD](https://comparepv.com/panel/just-solar-jst-fcmh-710w-hd) | 710 | 22.9 | -0.260 | Monocrystalline |
| 8 | [JST-EBMH-560W-D](https://comparepv.com/panel/just-solar-jst-ebmh-560w-d) | 560 | 21.9 | -0.360 | Monocrystalline |
| 9 | [JST-EBMH-555W-D](https://comparepv.com/panel/just-solar-jst-ebmh-555w-d) | 555 | 21.7 | -0.360 | Monocrystalline |
| 10 | [JST-EBMH-550W-D](https://comparepv.com/panel/just-solar-jst-ebmh-550w-d) | 550 | 21.5 | -0.360 | Monocrystalline |


## Summary

Just Solar and A.B. Energy occupy fundamentally different positions in the solar industry. Just Solar is a solar panel manufacturer with a portfolio of 42 products built primarily around TOPCon cell technology; it is not listed on any stock exchange and does not carry Tier 1 bankability status from BloombergNEF, which limits its appeal to project financiers relying on non-recourse debt. A.B. Energy, by contrast, is a Germany-headquartered renewable energy project developer incorporated in 1996 - formerly known as ABO Wind AG and rebranded in 2024 - with roughly 1,400 employees and shares traded on Xetra and the Frankfurt Stock Exchange under ticker AB9. Its data here shows zero panel products in its portfolio, consistent with its role as a developer and integrator of wind, solar, battery, and hydrogen projects rather than a panel manufacturer in the conventional sense. A.B. Energy's institutional footprint, public listing, and nearly 30-year operating history give it considerably stronger financial visibility.

On product portfolio terms, only Just Solar has measurable panel data to evaluate. Its lineup averages 490.6 Wp per module with a peak of 740 Wp, and average panel efficiency sits at 22.08%, rising to a maximum of 23.82% at the top of the range. The dominant cell architecture is TOPCon, covering 52.38% of the catalog, with a temperature coefficient of -0.306%/°C that is competitive for warm-climate deployments. Roughly 16.67% of the portfolio is bifacial. Warranties average 28.45 years, which is above the typical 25-year industry baseline. This profile - high average power, strong peak efficiency, mostly monofacial TOPCon - positions Just Solar's lineup squarely at mid-to-large residential rooftops and commercial ground mounts where efficiency density matters. A.B. Energy lists no panel products, so a direct module-level comparison is not possible.

For a buyer seeking panels in 2025, Just Solar presents a technically solid if institutionally modest option: its TOPCon-led catalog offers competitive efficiency and above-average warranty terms, but the absence of Tier 1 status will complicate financing on larger utility-scale projects. A.B. Energy is not a panel supplier and should be evaluated as a project developer or EPC partner rather than a hardware vendor - the two companies are not interchangeable for a procurement decision.

\---LINKS---

\- https://about.bnef.com/tier-1-reports/ \| BloombergNEF Tier 1 Solar Module Reports - official quarterly list \| article

\- https://www.aboenergy.com/en/company/share.html \| ABO Energy - investor and company overview page \| article

\- https://www.solarreviews.com/blog/pros-and-cons-of-tier-1-vs-tier-2-solar-panels \| SolarReviews - Tier 1 vs Tier 2 solar panels explained \| article

\- https://www.cleanenergyreviews.info/blog/most-efficient-solar-panels \| Clean Energy Reviews - most efficient solar panels 2025 \| review

Sources:

\- \[BloombergNEF Tier 1 Reports\](https://about.bnef.com/tier-1-reports/)

\- \[ABO Energy investor page\](https://www.aboenergy.com/en/company/share.html)

\- \[SolarReviews - Tier 1 vs Tier 2\](https://www.solarreviews.com/blog/pros-and-cons-of-tier-1-vs-tier-2-solar-panels)

\- \[Clean Energy Reviews - Most Efficient Solar Panels 2025\](https://www.cleanenergyreviews.info/blog/most-efficient-solar-panels)

\- \[ABO Energy on Yahoo Finance\](https://finance.yahoo.com/quote/AB9.DE/)

Written by claude-sonnet from the figures above.


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Source: https://comparepv.com/a-b-energy-vs-just-solar