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Sonnen vs AKCOME - solar panel manufacturer comparison

Sonnen
Germany Founded 2010
Read the Sonnen review
VS
AKCOME
China Founded 2003
Read the AKCOME review
At a glance

AKCOME has the broader catalog (3 vs 0 models). AKCOME leans bifacial (100% 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.

Panel models
0 3
Highest power
0 Wp 700 Wp
Best efficiency
- 22.5%
Average efficiency
- 21.6%
Bifacial share
0% 100%
Average warranty
- 30 yrs
01

The two companies

Company facts, not datasheet figures
Sonnen

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...

Founded
2010
Headquarters
Wildpoldsried, Germany
Employees
1000-2000
AKCOME
Founded
2003
Headquarters
Suzhou, China
02

Catalogue against catalogue

Averages over every model in the database
Metric Sonnen AKCOME
Catalog & Power
Panel Models 0 3+3
Max Power 0 W 700 W+700 W
Avg Power 0 W 672 W+672 W
Efficiency
Max Efficiency - 22.54%
Avg Efficiency - 21.63%
Reliability & Warranty
Avg Temp Coefficient - -0.240%/°C
Bifacial Share 0 (0%) 3 (100%)+100 pp
Avg Warranty - 30.0 yrs

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.

03

What each of them builds

Cell technology across the market
Efficiency spread
Share of each catalogue in every efficiency band
Power spread
Share of each catalogue in every power band

AKCOME offers more 600W+ panels (100% of lineup)

Sonnen cell technology
Share of their models by cell architecture
AKCOME cell technology
Share of their models by cell architecture

Dominant cell tech: <strong>HJT</strong> (100%)

04

The flagships

Highest-power models from each brand
Sonnen all models
No panels from this manufacturer are in the database yet.
05

Written summary

Checking cache...

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.

Generated by Claude Sonnet · 2026-06-08

06

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Something missing from a catalogue? Both lists are built from the datasheets in the database. If a model is absent, it has not been ingested yet.

Shop prices: See 2 AKCOME 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.