--- title: "ASM vs CSUN - Brand Comparison | ComparePV" description: "Compare ASM vs CSUN solar panels: full portfolio, efficiency, cell technology breakdown, warranty terms and company background." source: "https://comparepv.com/asm-vs-csun" --- # ASM vs CSUN CSUN has the broader catalog (35 vs 1 models). CSUN leads on peak efficiency at 21.60%. ## The two companies | Attribute | ASM | CSUN | | --- | --- | --- | | Country | Australia | China | | Headquarters | Hallam, Victoria | Nanjing | | Founded | 2009 | 2004 | | Employees | 1-10 | 1000-5000 | | Annual capacity | | 2-3 GW/year | | Tier 1 | no | yes | | Listed | | | | Website | [https://www.australiansolarmanufacturing.com.au](https://www.australiansolarmanufacturing.com.au) | [https://www.csun-solar.com](https://www.csun-solar.com) | Australian Solar Manufacturing (ASM) is a small Australian solar panel assembler that produces crystalline monocrystalline modules domestically using components sourced from Germany, Japan, the USA, and China. The company focuses on providing locally assembled PV modules tailored to Australian conditions, supporting... China Sunergy (CSUN) is a Chinese manufacturer of solar cells and photovoltaic modules headquartered in Nanjing, Jiangsu. The company produces high-efficiency mono- and multicrystalline solar cells and modules from production facilities in China and, historically, Turkey. It was formerly listed on NASDAQ and was... ## Catalog & Power | Measure | ASM | CSUN | Margin | | --- | --- | --- | --- | | Panel Models | 1 | 35 | +34 | | Max Power | 170 W | 670 W | +500 W | | Avg Power | 170 W | 478 W | +308 W | ## Efficiency | Measure | ASM | CSUN | Margin | | --- | --- | --- | --- | | Max Efficiency | 16.00% | 21.60% | +5.60 pp | | Avg Efficiency | 16.00% | 20.15% | +4.15 pp | ## Reliability & Warranty | Measure | ASM | CSUN | Margin | | --- | --- | --- | --- | | Avg Temp Coefficient | -0.438%/°C | -0.366%/°C | +0.072 | | Bifacial Share | 0 (0%) | 0 (0%) | | | Avg Warranty | - | 25.0 yrs | | ## Efficiency distribution | Efficiency band | ASM | CSUN | | --- | --- | --- | | \<20% | 1 (100.0%) | 11 (31.4%) | | 20-21% | 0 | 13 (37.1%) | | 21-22% | 0 | 11 (31.4%) | ## Power distribution CSUN offers more 600W+ panels (20% of lineup) | Power band | ASM | CSUN | | --- | --- | --- | | \<400W | 1 (100.0%) | 15 (42.9%) | | 400-499W | 0 | 5 (14.3%) | | 500-599W | 0 | 8 (22.9%) | | 600-699W | 0 | 7 (20.0%) | ## Cell technology Dominant cell tech: **PERC** (94%) | Technology | ASM | CSUN | | --- | --- | --- | | Unknown | 1 (100.0%) | 0 | | PERC | 0 | 33 (94.3%) | | TOPCon | 0 | 2 (5.7%) | ## Top panels, ASM | # | Model | Power | Efficiency | Temp. coefficient | Technology | | --- | --- | --- | --- | --- | --- | | 1 | [ASM170M](https://comparepv.com/panel/australian-solar-manufacturing-asm170m) | 170 | 16.0 | -0.438 | Monocrystalline | ## Top panels, CSUN | # | Model | Power | Efficiency | Temp. coefficient | Technology | | --- | --- | --- | --- | --- | --- | | 1 | [CSUN670-132M](https://comparepv.com/panel/csun-csun670-132m) | 670 | 21.6 | -0.350 | Monocrystalline | | 2 | [CSUN665-132M](https://comparepv.com/panel/csun-csun665-132m) | 665 | 21.4 | -0.350 | Monocrystalline | | 3 | [CSUN660-132M](https://comparepv.com/panel/csun-csun660-132m) | 660 | 21.2 | -0.350 | Monocrystalline | | 4 | [CSUN655-132M](https://comparepv.com/panel/csun-csun655-132m) | 655 | 21.1 | -0.350 | Monocrystalline | | 5 | [CSUN650-132M](https://comparepv.com/panel/csun-csun650-132m) | 650 | 20.9 | -0.350 | Monocrystalline | | 6 | [CSUN645-132M](https://comparepv.com/panel/csun-csun645-132m) | 645 | 20.8 | -0.350 | Monocrystalline | | 7 | [CSUN600-156M](https://comparepv.com/panel/csun-csun600-156m) | 600 | 21.4 | -0.360 | Monocrystalline | | 8 | [CSUN595-156M](https://comparepv.com/panel/csun-csun595-156m) | 595 | 21.2 | -0.360 | Monocrystalline | | 9 | [CSUN590-156M](https://comparepv.com/panel/csun-csun590-156m) | 590 | 21.1 | -0.360 | Monocrystalline | | 10 | [CSUN585-156M](https://comparepv.com/panel/csun-csun585-156m) | 585 | 20.9 | -0.360 | Monocrystalline | ## Summary ASM, short for Australian Solar Manufacturing, is a small panel assembler founded around 2009 and based in Victoria, Australia, which assembles monocrystalline modules domestically using imported cells and components rather than manufacturing photovoltaic cells itself. It has never appeared on BloombergNEF's Tier 1 bankability list and operates at a boutique scale, with fewer than a dozen staff historically, serving a niche domestic market rather than exporting globally. CSUN, the brand of China Sunergy Co Ltd, was founded in 2004 in Nanjing, China, once traded on Nasdaq until being delisted in 2016, and built manufacturing facilities across China, the US, Turkey, South Korea and Vietnam with roughly 2.5 GW of annual production capacity. CSUN has also had an inconsistent Tier 1 record, with some assessments excluding it from BloombergNEF's current list, and its panels were formally de-listed by Australia's Clean Energy Council from the Small-scale Renewable Energy Scheme over cell and connector conformance issues. On institutional footprint, CSUN is clearly the larger and more internationally established manufacturer, despite its own bankability and compliance controversies, while ASM remains a small, locally focused assembler. In terms of product use cases, ASM's modules are aimed squarely at Australian residential rooftops and small commercial installations, with domestic assembly as the main selling point for buyers who value shorter supply chains or locally sourced hardware over cutting-edge cell technology or price competitiveness. CSUN's catalog has historically spanned half-cell, full-cell, and bifacial monocrystalline panels, including higher-wattage modules marketed at both residential and commercial segments, with pricing generally positioned below many higher-tier Chinese competitors, though independent performance testing in past years placed CSUN modules mid-to-lower pack rather than top tier. For a typical buyer in 2025, neither brand is a strong default choice: ASM suits a narrow niche of Australian customers prioritizing local manufacture over broad international backing, while CSUN's larger scale is offset by inconsistent Tier 1 status and a documented compliance delisting in at least one major market, making its bankability and long-term warranty support less certain than top-tier global brands. Buyers evaluating either should weigh these limitations carefully against more established Tier 1 alternatives before committing to a large installation. \---LINKS--- \- https://www.solarquotes.com.au/blog/csun-solar-panel-delisting-mb1163/ \| CEC De-Lists China Sunergy CSUN Solar Panels \| article \- https://www.solarreviews.com/manufacturers/china-sunergy \| Are China Sunergy (CSUN) panels the best solar panels to buy? \| review \- https://en.wikipedia.org/wiki/China\_Sunergy \| China Sunergy company background and Nasdaq delisting \| article \- https://www.solarquotes.com.au/installer-review/asm-solar-and-electrical/ \| ASM Solar and Electrical Reviews \| review \- https://www.energysage.com/solar-panels/CSUN\_sunergy/ \| CSUN - China Sunergy Solar Panels overview \| review Written by claude-sonnet-5 from the figures above. ## Other comparisons - [ASM vs A.B. Energy](https://comparepv.com/asm-vs-a-b-energy) - [AE Solar vs CSUN](https://comparepv.com/ae-solar-vs-csun) - [ASM vs AEET](https://comparepv.com/asm-vs-aeet) - [AIKO vs CSUN](https://comparepv.com/aiko-vs-csun) - [ASM vs AKCOME](https://comparepv.com/asm-vs-akcome) - [ARTsolar vs CSUN](https://comparepv.com/artsolar-vs-csun) --- Source: https://comparepv.com/asm-vs-csun Not in this file, on the page: the distributions above drawn as charts.