--- title: "ARTsolar vs Viessmann - Brand Comparison | ComparePV" description: "Compare ARTsolar vs Viessmann solar panels: full portfolio, efficiency, cell technology breakdown, warranty terms and company background." source: "https://comparepv.com/artsolar-vs-viessmann" --- # ARTsolar vs Viessmann Viessmann has the broader catalog (11 vs 0 models). ## The two companies | Attribute | ARTsolar | Viessmann | | --- | --- | --- | | Country | South Africa | Germany | | Headquarters | Durban | Allendorf | | Founded | 2010 | 1917 | | Employees | | | | Annual capacity | | | | Tier 1 | no | no | | Listed | | | | Website | [https://www.artsolar.co.za](https://www.artsolar.co.za) | [https://www.viessmann.com](https://www.viessmann.com) | ## Catalog & Power | Measure | ARTsolar | Viessmann | Margin | | --- | --- | --- | --- | | Panel Models | 0 | 11 | +11 | | Max Power | 0 W | 405 W | +405 W | | Avg Power | 0 W | 361 W | +361 W | ## Efficiency | Measure | ARTsolar | Viessmann | Margin | | --- | --- | --- | --- | | Max Efficiency | - | 21.30% | | | Avg Efficiency | - | 19.41% | | ## Reliability & Warranty | Measure | ARTsolar | Viessmann | Margin | | --- | --- | --- | --- | | Avg Temp Coefficient | - | -0.362%/°C | | | Bifacial Share | 0 (0%) | 0 (0%) | | | Avg Warranty | - | 25.0 yrs | | ## Efficiency distribution | Efficiency band | ARTsolar | Viessmann | | --- | --- | --- | | \<20% | 0 | 3 (27.3%) | | 20-21% | 0 | 6 (54.5%) | | 21-22% | 0 | 2 (18.2%) | ## Power distribution | Power band | ARTsolar | Viessmann | | --- | --- | --- | | \<400W | 0 | 6 (54.5%) | | 400-499W | 0 | 5 (45.5%) | ## Cell technology Dominant cell tech: **PERC** (73%) | Technology | ARTsolar | Viessmann | | --- | --- | --- | | PERC | 0 | 8 (72.7%) | | Unknown | 0 | 3 (27.3%) | ## Top panels, Viessmann | # | Model | Power | Efficiency | Temp. coefficient | Technology | | --- | --- | --- | --- | --- | --- | | 1 | [M405WE](https://comparepv.com/panel/viessmann-m405we) | 405 | 20.7 | -0.340 | Monocrystalline | | 2 | [M405WK](https://comparepv.com/panel/viessmann-m405wk) | 405 | 20.7 | -0.340 | Monocrystalline | | 3 | [M400WG](https://comparepv.com/panel/viessmann-m400wg) | 400 | 21.3 | -0.340 | Monocrystalline | | 4 | [M400WE](https://comparepv.com/panel/viessmann-m400we) | 400 | 20.4 | -0.340 | Monocrystalline | | 5 | [M400WK](https://comparepv.com/panel/viessmann-m400wk) | 400 | 20.4 | -0.340 | Monocrystalline | | 6 | [M395WG](https://comparepv.com/panel/viessmann-m395wg) | 395 | 21.1 | -0.340 | Monocrystalline | | 7 | [M395WK](https://comparepv.com/panel/viessmann-m395wk) | 395 | 20.1 | -0.340 | Monocrystalline | | 8 | [M390WG](https://comparepv.com/panel/viessmann-m390wg) | 390 | 20.8 | -0.340 | Monocrystalline | | 9 | [P265PGHC](https://comparepv.com/panel/viessmann-p265pghc) | 265 | 16.3 | -0.420 | Polycrystalline | | 10 | [P260PGHC](https://comparepv.com/panel/viessmann-p260pghc) | 260 | 16.0 | -0.420 | Polycrystalline | ## Summary ARTsolar is a South African manufacturer headquartered in Durban, founded in 2010 by entrepreneurs Eshu Seevnarayan and Patrick Goss as African Renewable Technologies - the country's only locally owned solar panel producer. The company has scaled its assembly capacity to around 340 MW per year through a 2025 collaboration with Tier 1 Chinese manufacturer JA Solar, following earlier technology partnerships with LONGi and Talesun. ARTsolar does not appear independently on the BloombergNEF Tier 1 bankability list, but its modules have been certified to Tier 1-quality standards by leveraging its partners' bills of materials, ISO 9001 certification, and TUV-approved processes. Viessmann is a German energy-systems brand with roots going back to 1917, now operating its photovoltaic and climate-solutions business under Viessmann Climate Solutions after the broader group's partial sale to Carrier Global in 2023. Viessmann holds the EUPD Top Brand PV seal in Germany but similarly does not appear as a standalone entry on BNEF Tier 1 module rankings, as it functions more as a branded systems integrator than a primary cell manufacturer. In terms of institutional scale and global reach, Viessmann's European distribution network and brand recognition give it the stronger footprint outside sub-Saharan Africa. ARTsolar's product range spans residential and commercial rooftop applications as well as utility-scale projects qualifying under South Africa's REIPPPP and RMIPPPP local-content procurement rules - a niche where it has no direct domestic competitor. Its 2025 JA Solar partnership focuses on large-format, high-efficiency TOPCon modules assembled at its Durban facility. Viessmann's photovoltaic lineup centers on the Vitovolt 300 series: a standard glass-film PERC variant and the premium Vitovolt 300-DG, which uses bifacial N-type TOPCon double-glass construction and achieves up to 22.3 percent efficiency. Viessmann positions its panels as part of a tightly integrated residential energy package - combining inverters, the Vitocharge VX3 battery storage unit, and heating systems - and is aimed squarely at the European premium rooftop market. For a buyer in South Africa or an African market requiring local-content compliance, ARTsolar is the logical default and often the only bankable locally assembled option. For a European homeowner seeking a fully integrated, brand-supported residential energy system with long German-market track record, Viessmann is a credible premium choice. The two brands serve almost entirely different geographies and procurement contexts, making a direct head-to-head verdict less meaningful than recognizing that each is essentially purpose-built for its own market. \---LINKS--- \- https://www.pv-magazine.com/2025/06/17/ja-solar-artsolar-agree-to-expand-pv-module-manufacturing-in-south-africa/ \| JA Solar, ARTsolar agree to expand PV module manufacturing in South Africa \| article \- https://www.engineeringnews.co.za/article/artsolar-and-ja-solar-driving-south-africas-renewable-energy-revolution-2025-06-12 \| ARTsolar and JA Solar - driving South Africa's renewable energy revolution \| article \- https://www.viessmann-climatesolutions.com/en/newsroom/solution-offering/vitovolt-300-dg-innovative-photovoltaic-modules-for-flexible-installation-in-a-wide-range-of-locations.html \| Vitovolt 300-DG double glass module - Viessmann Climate Solutions \| article \- https://www.energysage.com/supplier/201/viessmann/ \| Viessmann - Profile and Reviews 2025 - EnergySage \| review \- https://www.moneyweb.co.za/news/industry/worlds-largest-solar-tech-leader-partners-with-sa-pv-panel-maker/ \| World's largest solar tech leader partners with SA PV panel maker \| article Written by claude-sonnet from the figures above. ## Other comparisons - [ARTsolar vs A.B. Energy](https://comparepv.com/artsolar-vs-a-b-energy) - [AE Solar vs Viessmann](https://comparepv.com/ae-solar-vs-viessmann) - [ARTsolar vs AEET](https://comparepv.com/artsolar-vs-aeet) - [AIKO vs Viessmann](https://comparepv.com/aiko-vs-viessmann) - [ARTsolar vs AKCOME](https://comparepv.com/artsolar-vs-akcome) - [ASM vs Viessmann](https://comparepv.com/asm-vs-viessmann) --- Source: https://comparepv.com/artsolar-vs-viessmann