---
title: "Canadian Solar vs Sonnen - Brand Comparison | ComparePV"
description: "Compare Canadian Solar vs Sonnen solar panels: full portfolio, efficiency, cell technology breakdown, warranty terms and company background."
source: "https://comparepv.com/canadian-solar-vs-sonnen"
---

# Canadian Solar vs Sonnen

Canadian Solar has the broader catalog (292 vs 0 models). Canadian Solar leans bifacial (46% of lineup).


## The two companies


| Attribute | Canadian Solar | Sonnen |
| --- | --- | --- |
| Country | Canada | Germany |
| Headquarters | Kitchener | Wildpoldsried |
| Founded | 2001 | 2010 |
| Employees | 17,113 | 1000-2000 |
| Annual capacity | 51 GW/year |  |
| Tier 1 | yes |  |
| Listed | NASDAQ: CSIQ |  |
| Website | [https://www.canadiansolar.com](https://www.canadiansolar.com) | [https://sonnengroup.com](https://sonnengroup.com) |

Canadian Solar Inc. is a global renewable energy company founded in 2001. Headquartered in Kitchener, Ontario, it manufactures solar PV modules and provides battery energy storage solutions. The company also develops utility-scale solar power and battery energy storage projects.

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 | Canadian Solar | Sonnen | Margin |
| --- | --- | --- | --- |
| Panel Models | 292 | 0 | +292 |
| Max Power | 730 W | 0 W | +730 W |
| Avg Power | 472 W | 0 W | +472 W |


## Efficiency


| Measure | Canadian Solar | Sonnen | Margin |
| --- | --- | --- | --- |
| Max Efficiency | 24.40% | - |  |
| Avg Efficiency | 20.66% | - |  |


## Reliability & Warranty


| Measure | Canadian Solar | Sonnen | Margin |
| --- | --- | --- | --- |
| Avg Temp Coefficient | -0.331%/°C | - |  |
| Bifacial Share | 133 (46%) | 0 (0%) | +46 pp |
| Avg Warranty | 28.2 yrs | - |  |


## Efficiency distribution

Canadian Solar skews to higher efficiency: 13% of lineup is 23%+


| Efficiency band | Canadian Solar | Sonnen |
| --- | --- | --- |
| \<20% | 128 (43.8%) | 0 |
| 20-21% | 36 (12.3%) | 0 |
| 21-22% | 41 (14.0%) | 0 |
| 22-23% | 50 (17.1%) | 0 |
| 23%+ | 37 (12.7%) | 0 |


## Power distribution

Canadian Solar offers more 600W+ panels (24% of lineup)


| Power band | Canadian Solar | Sonnen |
| --- | --- | --- |
| \<400W | 104 (35.6%) | 0 |
| 400-499W | 72 (24.7%) | 0 |
| 500-599W | 45 (15.4%) | 0 |
| 600-699W | 64 (21.9%) | 0 |
| 700W+ | 7 (2.4%) | 0 |


## Cell technology

Dominant cell tech: **PERC** (67%)


| Technology | Canadian Solar | Sonnen |
| --- | --- | --- |
| PERC | 195 (66.8%) | 0 |
| TOPCon | 85 (29.1%) | 0 |
| HJT | 12 (4.1%) | 0 |


## Top panels, Canadian Solar


| # | Model | Power | Efficiency | Temp. coefficient | Technology |
| --- | --- | --- | --- | --- | --- |
| 1 | [CS7N-730TB-AG](https://comparepv.com/panel/csi-solar-co-ltd-canadian-solar-cs7n-730tb-ag) | 730 | 23.5 | -0.290 | Monocrystalline |
| 2 | [CS7N-725TB-AG](https://comparepv.com/panel/csi-solar-co-ltd-canadian-solar-cs7n-725tb-ag) | 725 | 23.3 | -0.290 | Monocrystalline |
| 3 | [CS7N-720TB-AG](https://comparepv.com/panel/csi-solar-co-ltd-canadian-solar-cs7n-720tb-ag) | 720 | 23.2 | -0.290 | Monocrystalline |
| 4 | [CS7N-715TB-AG](https://comparepv.com/panel/csi-solar-co-ltd-canadian-solar-cs7n-715tb-ag) | 715 | 23.0 | -0.290 | Monocrystalline |
| 5 | [CS7N-710TB-AG](https://comparepv.com/panel/csi-solar-co-ltd-canadian-solar-cs7n-710tb-ag) | 710 | 22.9 | -0.290 | Monocrystalline |
| 6 | [CS7N-705TB-AG](https://comparepv.com/panel/csi-solar-co-ltd-canadian-solar-cs7n-705tb-ag) | 705 | 22.7 | -0.290 | Monocrystalline |
| 7 | [CS7N-700TB-AG](https://comparepv.com/panel/csi-solar-co-ltd-canadian-solar-cs7n-700tb-ag) | 700 | 22.5 | -0.290 | Monocrystalline |
| 8 | [CS7N-695TB-AG](https://comparepv.com/panel/csi-solar-co-ltd-canadian-solar-cs7n-695tb-ag) | 695 | 22.4 | -0.290 | Monocrystalline |
| 9 | [CS7N-690TB-AG](https://comparepv.com/panel/csi-solar-co-ltd-canadian-solar-cs7n-690tb-ag) | 690 | 22.2 | -0.290 | Monocrystalline |
| 10 | [CS7N-675MS](https://comparepv.com/panel/csi-solar-co-ltd-canadian-solar-cs7n-675ms) | 675 | 21.7 | -0.340 | Monocrystalline |


## Summary

Canadian Solar is a Canadian-founded company (Guelph, Ontario, 2001) with its manufacturing base primarily in China. It is publicly listed on NASDAQ and has earned placement on the S&P Global Commodity Insights Premier List of Tier 1 Cleantech Companies for 2025, one of the industry's key bankability signals for project finance. Its planned module production capacity sits above 50 GW annually, placing it firmly among the largest solar panel manufacturers in the world by volume. Sonnen, by contrast, is a German company founded in 2010 in Wildpoldsried, Bavaria, and has operated as a wholly owned subsidiary of Shell since 2019. Sonnen does not manufacture solar panels at all - it is a residential and small commercial energy storage specialist. The two brands occupy fundamentally different positions in the solar supply chain, and a direct like-for-like comparison is not possible.

Canadian Solar's product portfolio spans the full spectrum of solar applications. Its residential and commercial lines center on TOPCon-based modules such as the TOPHiKu6, while its HiHero+ line uses HJT cell technology reaching up to 24.4% efficiency for premium applications. Bifacial TOPCon variants under the TOPBiHiKu name target C&I and utility-scale ground mounts. SolarReviews ranked Canadian Solar's TOPHiKu6 as its top residential panel for 2025, and EnergySage data shows it pricing below the national average at around $2.96 per watt installed. Sonnen's offer is entirely different: its sonnenCore+ and sonnenEvo are AC-coupled lithium iron phosphate home batteries, sold in 10 kWh increments with a rated cycle life of up to 10,000 cycles. Sonnen also operates sonnenVPP, a virtual power plant that aggregates enrolled home batteries to support grid stability and offer homeowners bill credits.

For a buyer shopping for solar modules, Canadian Solar is a clear, well-supported, bankable choice in 2025 with broad installer availability and competitive pricing. Sonnen is relevant only for buyers who have already decided to add battery storage to their system - and even then, it competes against products such as the Tesla Powerwall 3 rather than against any panel brand. A complete residential solar-plus-storage system could theoretically include Canadian Solar panels paired with a Sonnen battery, but the two brands are complements, not rivals.

\---LINKS---

\- https://www.solarreviews.com/blog/canadian-solar-panels-expert-review \| Canadian Solar Panels 2025 Expert Review - SolarReviews \| review

\- https://www.energysage.com/solar/best-solar-panels-complete-ranking/canadian-solar-panels-complete-review/ \| Canadian Solar Panels Complete Review - EnergySage \| review

\- https://www.prnewswire.com/news-releases/canadian-solar-makes-sp-global-commodity-insights-premier-list-of-tier-1-cleantech-companies-2025-302553562.html \| Canadian Solar Makes S&P Global Tier 1 Cleantech List 2025 \| article

\- https://www.solarreviews.com/blog/sonnen-battery-review \| Sonnen Battery Expert Review - SolarReviews \| review

\- https://www.energysage.com/energy-storage/best-home-batteries/sonnen-eco-battery-review/ \| Sonnen Eco Battery Review - EnergySage \| review

Sources:

\- \[Canadian Solar Panels 2025 Expert Review - SolarReviews\](https://www.solarreviews.com/blog/canadian-solar-panels-expert-review)

\- \[Canadian Solar Panels Complete Review - EnergySage\](https://www.energysage.com/solar/best-solar-panels-complete-ranking/canadian-solar-panels-complete-review/)

\- \[Canadian Solar Makes S&P Global Tier 1 Cleantech List 2025\](https://www.prnewswire.com/news-releases/canadian-solar-makes-sp-global-commodity-insights-premier-list-of-tier-1-cleantech-companies-2025-302553562.html)

\- \[Sonnen Battery Expert Review - SolarReviews\](https://www.solarreviews.com/blog/sonnen-battery-review)

\- \[Sonnen Eco Battery Review - EnergySage\](https://www.energysage.com/energy-storage/best-home-batteries/sonnen-eco-battery-review/)

Written by claude-sonnet from the figures above.


## Other comparisons

- [Canadian Solar vs A.B. Energy](https://comparepv.com/canadian-solar-vs-a-b-energy)
- [AE Solar vs Sonnen](https://comparepv.com/ae-solar-vs-sonnen)
- [Canadian Solar vs AEET](https://comparepv.com/canadian-solar-vs-aeet)
- [AIKO vs Sonnen](https://comparepv.com/aiko-vs-sonnen)
- [Canadian Solar vs AKCOME](https://comparepv.com/canadian-solar-vs-akcome)
- [ARTsolar vs Sonnen](https://comparepv.com/artsolar-vs-sonnen)


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Source: https://comparepv.com/canadian-solar-vs-sonnen

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