--- title: "Sonnen vs AKCOME - Brand Comparison | ComparePV" description: "Compare Sonnen vs AKCOME solar panels: full portfolio, efficiency, cell technology breakdown, warranty terms and company background." source: "https://comparepv.com/sonnen-vs-akcome" --- # Sonnen vs AKCOME AKCOME has the broader catalog (3 vs 0 models). AKCOME leans bifacial (100% of lineup). ## The two companies | Attribute | Sonnen | AKCOME | | --- | --- | --- | | Country | Germany | China | | Headquarters | Wildpoldsried | Suzhou | | Founded | 2010 | 2003 | | Employees | 1000-2000 | | | Annual capacity | | | | Tier 1 | | no | | Listed | | | | Website | [https://sonnengroup.com](https://sonnengroup.com) | [https://www.akcome.com](https://www.akcome.com) | Sonnen is a German energy storage technology company specializing in intelligent home battery systems, most notably the sonnenBatterie — the world's first all-in-one lithium-ion home battery system commercially available. The company also develops virtual power plant (VPP) solutions and energy community platforms... ## Catalog & Power | Measure | Sonnen | AKCOME | Margin | | --- | --- | --- | --- | | Panel Models | 0 | 3 | +3 | | Max Power | 0 W | 700 W | +700 W | | Avg Power | 0 W | 672 W | +672 W | ## Efficiency | Measure | Sonnen | AKCOME | Margin | | --- | --- | --- | --- | | Max Efficiency | - | 22.54% | | | Avg Efficiency | - | 21.63% | | ## Reliability & Warranty | Measure | Sonnen | AKCOME | Margin | | --- | --- | --- | --- | | Avg Temp Coefficient | - | -0.240%/°C | | | Bifacial Share | 0 (0%) | 3 (100%) | +100 pp | | Avg Warranty | - | 30.0 yrs | | ## Efficiency distribution | Efficiency band | Sonnen | AKCOME | | --- | --- | --- | | 21-22% | 0 | 2 (66.7%) | | 22-23% | 0 | 1 (33.3%) | ## Power distribution AKCOME offers more 600W+ panels (100% of lineup) | Power band | Sonnen | AKCOME | | --- | --- | --- | | 600-699W | 0 | 2 (66.7%) | | 700W+ | 0 | 1 (33.3%) | ## Cell technology Dominant cell tech: **HJT** (100%) | Technology | Sonnen | AKCOME | | --- | --- | --- | | HJT | 0 | 3 (100.0%) | ## Top panels, AKCOME | # | Model | Power | Efficiency | Temp. coefficient | Technology | | --- | --- | --- | --- | --- | --- | | 1 | [SKA611HDGDC-700W](https://comparepv.com/panel/akcome-ska611hdgdc-700w) | 700 | 22.5 | -0.240 | Monocrystalline | | 2 | [SKA611HDGDC-660W](https://comparepv.com/panel/akcome-ska611hdgdc-660w) | 660 | 21.2 | -0.240 | Monocrystalline | | 3 | [SKA611HDGDC-655W](https://comparepv.com/panel/akcome-ska611hdgdc-655w) | 655 | 21.1 | -0.240 | Monocrystalline | ## Summary AKCOME is a Chinese solar module manufacturer headquartered in the Zhejiang and Jiangsu provinces of China, with production facilities in Suzhou and Ganzhou. The company was listed on the Shenzhen Stock Exchange and appeared on Bloomberg's Tier 1 bankability list as recently as 2022, but was subsequently removed. In 2024, a key subsidiary - Zhejiang Akcome Photovoltaic Technology - was ordered by a court to begin bankruptcy reorganization after a creditor determined it could not pay its debts. The Shenzhen Stock Exchange ultimately terminated AKCOME's listing after its shares traded below 1 yuan for 20 consecutive trading days, and production was suspended at four of its manufacturing subsidiaries. Sonnen, by contrast, is a German company founded in 2010 in Wildpoldsried, Bavaria, focused exclusively on home energy storage systems, not solar panel manufacturing. Acquired by Royal Dutch Shell in 2019 for an undisclosed sum, Sonnen operates as part of Shell's New Energies division and is widely regarded as a market leader in residential battery storage in Germany and beyond. On institutional footprint and financial stability, Sonnen is the stronger entity by a wide margin. These two brands serve fundamentally different parts of the solar energy ecosystem and do not compete directly with each other. AKCOME's product range centers on photovoltaic modules, including bifacial panels suited to ground-mounted and commercial installations, with its catalog historically targeting mid-market buyers across Asia-Pacific and internationally. Sonnen produces no solar panels whatsoever - its lineup consists of home battery storage units (notably the sonnenEco series) built around lithium iron phosphate chemistry, designed for residential self-consumption and virtual power plant participation. A buyer seeking solar panels would look at AKCOME; a buyer seeking to store solar-generated electricity would look at Sonnen. For a typical buyer in 2025-2026, AKCOME carries significant counterparty risk given its active bankruptcy reorganization and production suspensions - procuring panels or claiming warranty service from a manufacturer in financial distress is a serious practical concern. Sonnen, within its own category of residential storage, remains a credible if premium-priced option backed by Shell's balance sheet. If the question is purely which brand to trust today, Sonnen's backing and operational stability give it a clear edge, though the comparison is ultimately an apples-to-oranges one: one brand makes panels, the other stores the energy they generate. \---LINKS--- \- https://www.pv-magazine.com/2024/07/30/chinese-pv-industry-brief-akcome-provides-update-on-restructuring-process/ \| AKCOME bankruptcy reorganization update - PV Magazine July 2024 \| article \- https://www.solarchoice.net.au/products/panels/akcome-solar-panels-review/ \| AKCOME Solar Panels independent review - Solar Choice Australia \| review \- https://www.solarreviews.com/blog/sonnen-battery-review \| Sonnen battery expert review - cost and performance 2025 \| review \- https://www.energy-storage.news/why-shell-bought-sonnen-value-is-in-behind-the-meter-potential/ \| Why Shell acquired Sonnen - behind-the-meter strategy analysis \| article \- https://www.bnnbloomberg.ca/investing/commodities/2024/07/30/chinese-solar-firm-forced-into-bankruptcy-as-supply-glut-bites/ \| Chinese solar firm forced into bankruptcy as supply glut bites \| article Sources: \- \[AKCOME bankruptcy reorganization update - PV Magazine\](https://www.pv-magazine.com/2024/07/30/chinese-pv-industry-brief-akcome-provides-update-on-restructuring-process/) \- \[AKCOME Solar Panels independent review - Solar Choice Australia\](https://www.solarchoice.net.au/products/panels/akcome-solar-panels-review/) \- \[Sonnen battery expert review - SolarReviews\](https://www.solarreviews.com/blog/sonnen-battery-review) \- \[Why Shell acquired Sonnen - Energy Storage News\](https://www.energy-storage.news/why-shell-bought-sonnen-value-is-in-behind-the-meter-potential/) \- \[Chinese solar firm forced into bankruptcy - BNN Bloomberg\](https://www.bnnbloomberg.ca/investing/commodities/2024/07/30/chinese-solar-firm-forced-into-bankruptcy-as-supply-glut-bites/) Written by claude-sonnet from the figures above. ## Other comparisons - [Sonnen vs A.B. Energy](https://comparepv.com/sonnen-vs-a-b-energy) - [AE Solar vs AKCOME](https://comparepv.com/ae-solar-vs-akcome) - [Sonnen vs AEET](https://comparepv.com/sonnen-vs-aeet) - [AIKO vs AKCOME](https://comparepv.com/aiko-vs-akcome) - [Sonnen vs ARTsolar](https://comparepv.com/sonnen-vs-artsolar) - [ASM vs AKCOME](https://comparepv.com/asm-vs-akcome) --- Source: https://comparepv.com/sonnen-vs-akcome