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

# A.B. Energy vs G-STAR

G-STAR has the broader catalog (36 vs 0 models). G-STAR leans bifacial (86% of lineup).


## The two companies


| Attribute | A.B. Energy | G-STAR |
| --- | --- | --- |
| 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 | G-STAR | Margin |
| --- | --- | --- | --- |
| Panel Models | 0 | 36 | +36 |
| Max Power | 0 W | 725 W | +725 W |
| Avg Power | 0 W | 562 W | +562 W |


## Efficiency


| Measure | A.B. Energy | G-STAR | Margin |
| --- | --- | --- | --- |
| Max Efficiency | - | 23.51% |  |
| Avg Efficiency | - | 22.41% |  |


## Reliability & Warranty


| Measure | A.B. Energy | G-STAR | Margin |
| --- | --- | --- | --- |
| Avg Temp Coefficient | - | -0.307%/°C |  |
| Bifacial Share | 0 (0%) | 31 (86%) | +86 pp |
| Avg Warranty | - | 30.0 yrs |  |


## Efficiency distribution

G-STAR skews to higher efficiency: 28% of lineup is 23%+


| Efficiency band | A.B. Energy | G-STAR |
| --- | --- | --- |
| 20-21% | 0 | 3 (8.3%) |
| 21-22% | 0 | 5 (13.9%) |
| 22-23% | 0 | 18 (50.0%) |
| 23%+ | 0 | 10 (27.8%) |


## Power distribution

G-STAR offers more 600W+ panels (36% of lineup)


| Power band | A.B. Energy | G-STAR |
| --- | --- | --- |
| 400-499W | 0 | 11 (30.6%) |
| 500-599W | 0 | 12 (33.3%) |
| 600-699W | 0 | 7 (19.4%) |
| 700W+ | 0 | 6 (16.7%) |


## Cell technology

Dominant cell tech: **TOPCon** (72%)


| Technology | A.B. Energy | G-STAR |
| --- | --- | --- |
| TOPCon | 0 | 26 (72.2%) |
| N-type | 0 | 5 (13.9%) |
| PERC | 0 | 5 (13.9%) |


## Top panels, G-STAR


| # | Model | Power | Efficiency | Temp. coefficient | Technology |
| --- | --- | --- | --- | --- | --- |
| 1 | [GSD8K66T-725WT](https://comparepv.com/panel/g-star-gsd8k66t-725wt) | 725 | 23.3 | -0.300 | Monocrystalline |
| 2 | [GSD8K66T-720WT](https://comparepv.com/panel/g-star-gsd8k66t-720wt) | 720 | 23.2 | -0.300 | Monocrystalline |
| 3 | [GSD8K66T-715WT](https://comparepv.com/panel/g-star-gsd8k66t-715wt) | 715 | 23.0 | -0.300 | Monocrystalline |
| 4 | [GSD8K66T-710WT](https://comparepv.com/panel/g-star-gsd8k66t-710wt) | 710 | 22.9 | -0.300 | Monocrystalline |
| 5 | [GSD8K66T-705WT](https://comparepv.com/panel/g-star-gsd8k66t-705wt) | 705 | 22.7 | -0.300 | Monocrystalline |
| 6 | [GSD8K66T-700WT](https://comparepv.com/panel/g-star-gsd8k66t-700wt) | 700 | 22.5 | -0.300 | Monocrystalline |
| 7 | [GSD8R66T-635WT](https://comparepv.com/panel/g-star-gsd8r66t-635wt) | 635 | 23.5 | -0.300 | Monocrystalline |
| 8 | [GSD8R66T-630WT](https://comparepv.com/panel/g-star-gsd8r66t-630wt) | 630 | 23.3 | -0.300 | Monocrystalline |
| 9 | [GSD8R66T-625WT](https://comparepv.com/panel/g-star-gsd8r66t-625wt) | 625 | 23.1 | -0.300 | Monocrystalline |
| 10 | [GSD8R66T-620WT](https://comparepv.com/panel/g-star-gsd8r66t-620wt) | 620 | 22.9 | -0.300 | Monocrystalline |


## Summary

G-STAR (trading as Gstar Solar) is a solar module manufacturer headquartered in Singapore and incorporated in 2019 under the Standard Energy Group, a vertically integrated supply chain that includes wafer production in Indonesia and frame manufacturing in Laos. Its most significant recent development is the launch of a dedicated cell and module factory in Subic Bay, Philippines, with a first-phase nameplate of 1.5 GW of cells and 1 GW of modules, with a second phase intended to bring module capacity to 2 GW. G-STAR holds certifications from ETL, TUV, and the California CEC, though its presence on the BloombergNEF Tier 1 bankability list has not been confirmed by available sources. A.B. Energy SRLS, by contrast, is an Italian company rooted in three decades of electrical and electronic equipment trade that operates today as a solar products distributor rather than a panel manufacturer - sourcing modules from established brands such as LONGi, Trina Solar, JA Solar, and REC for resale across the European market. In terms of institutional scale and vertical manufacturing footprint, G-STAR is the larger and more production-oriented entity.

G-STAR's catalog spans residential, commercial, and utility-scale applications, covering P-type, N-type, HJT, and Back Contact cell technologies with outputs from around 100 W to over 700 W. Its May 2025 Philippines launch centered on an N-type bifacial dual-glass module reaching a reported conversion efficiency of 23.03% and a peak output of 595 W. A.B. Energy does not produce panels of its own; its value proposition lies in aggregating proven third-party brands - primarily N-type TOPCon and Back Contact products from top-tier Chinese and European makers - for Italian and European buyers who want local-language support and simplified procurement.

For a buyer seeking a direct relationship with a panel manufacturer, G-STAR is the relevant choice, particularly for projects in markets such as the United States, Europe, or India where its Southeast Asian factories are building trade-compliant supply chains. A.B. Energy fills a different role entirely - it is a regional distributor and is not interchangeable with a manufacturer like G-STAR.

\---LINKS---

\- https://www.pv-magazine.com/2025/05/14/gstar-launches-solar-cell-module-production-in-the-philippines/ \| Gstar launches solar cell, module production in the Philippines \| article

\- https://www.pv-magazine.com/2025/04/01/gstars-wafer-factory-in-indonesia-gets-monocrystalline-growth-furnaces/ \| Gstar wafer factory in Indonesia gets monocrystalline growth furnaces \| article

\- https://www.enfsolar.com/g-star \| G-STAR Pte. Ltd. - ENF Solar company profile \| article

\- https://www.enfsolar.com/a-b-energy \| A.B. Energy SRLS - ENF Solar company profile \| article

\- https://solarimpulse.com/companies/ab-energy-1 \| AB Energy - Solar Impulse Foundation member profile \| article

Sources:

\- \[Gstar launches solar cell, module production in the Philippines - pv magazine\](https://www.pv-magazine.com/2025/05/14/gstar-launches-solar-cell-module-production-in-the-philippines/)

\- \[Gstar's wafer factory in Indonesia gets monocrystalline growth furnaces - pv magazine\](https://www.pv-magazine.com/2025/04/01/gstars-wafer-factory-in-indonesia-gets-monocrystalline-growth-furnaces/)

\- \[G-STAR Pte. Ltd. - ENF Solar\](https://www.enfsolar.com/g-star)

\- \[A.B. Energy SRLS - ENF Solar\](https://www.enfsolar.com/a-b-energy)

\- \[AB Energy - Solar Impulse Foundation\](https://solarimpulse.com/companies/ab-energy-1)

Written by claude-sonnet from the figures above.


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Source: https://comparepv.com/a-b-energy-vs-g-star