--- title: "Canadian Solar CS1H-345MS Solar Panel: Specs & Datasheet | ComparePV" description: "Canadian Solar CS1H-345MS solar panel. Specs: 20.50% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/canadian-solar-cs1h-345ms" image: "https://comparepv.com/og/panel/canadian-solar-cs1h-345ms.png" updated: 2026-09-11 --- # Canadian Solar CS1H-345MS Space saver, no clear weak spot 291 panels in the segment PERC 300-350 W ## Identity - **Manufacturer:** Canadian Solar - **Model:** CS1H-345MS - **Series:** HiDM - **Rated power:** 345 W - **Cell technology:** PERC ## How it compares Compared against segment PERC 300-350 W (291 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 345 W | 325 W | Strong - top 4% | | | Module efficiency | 20.50% | 19.00% | Strong - top 3% | 11,389 | | Power density | 204.6 | 190.0 | Strong - top 2% | 11,593 | | Temperature coefficient | -0.370 | -0.360 | Typical | 13,161 | | Weight (kg) | 19.2 kg | 19.0 kg | Strong - top 11% | | | Performance warranty | 25 yrs | 25 yrs | Typical | 9,912 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 20.50% | 19.00% | Strong - top 3% | 11,389 | | Power density | 204.6 | 190.0 | Strong - top 2% | 11,593 | | Temperature coefficient | -0.370 | -0.360 | Typical | 13,161 | | Weight per kWp | 55.7 | 60.3 | Strong - top 11% | 10,101 | | Performance warranty | 25 yrs | 25 yrs | Typical | 9,912 | ### Strengths - **204.6 watts per square metre** - Top 2% of the PERC 300-350 W segment, against a median of 190.0. Ranked 11,593rd in the whole database. - **20.50% module efficiency** - Top 3% of the PERC 300-350 W segment, against a median of 19.00%. Ranked 11,389th in the whole database. - **55.7 kg per kWp** - Top 11% of the PERC 300-350 W segment, against a median of 60.3. - **Best for:** Residential and commercial. ## Specification ### Electrical - **Rated power (Pmax):** 345 W - **Efficiency:** 20.50 % - **Voltage at Pmax (Vmp):** 38.20 V - **Current at Pmax (Imp):** 9.04 A - **Open-circuit voltage (Voc):** 44.60 V - **Short-circuit current (Isc):** 9.80 A - **Max system voltage:** 1500 V ### Temperature - **Temperature coefficient of Pmax:** -0.370 %/degC - **Temperature coefficient of Voc:** -0.290 %/degC - **Temperature coefficient of Isc:** 0.050 %/degC - **NOCT:** 43 degC ### Cell and construction - **Cell type:** Monocrystalline - **Cell technology:** PERC ### Physical - **Length:** 1700 mm - **Width:** 992 mm - **Thickness:** 35 mm - **Weight:** 19.2 kg - **Area:** 1.69 m2 - **Power density:** 204.6 Wp/m2 ### Warranty and degradation - **Product warranty:** 15 years - **Performance warranty:** 25 years ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 11389 of 14129 | | Power density | 11593 of 14129 | | Temperature coefficient | 13161 of 14129 | | Weight | 10101 of 14129 | | Warranty | 9912 of 14129 | ## Pros - **High power density per roof area** - The High Density Mono PERC design minimizes inter-cell gaps, delivering more energy from the same roof footprint than conventional PERC modules - a key advantage for space-constrained residential installations. - **Improved partial-shading tolerance** - Lower internal cell current reduces hot-spot temperature and shading sensitivity, easing the impact of chimneys, antennas, or nearby structures - a common issue in urban and suburban installations. - **Tier-1 bankable manufacturer** - Canadian Solar has operated since 2001 and consistently ranks as a Tier-1 bankable manufacturer, easing project financing and reducing long-term warranty-service risk. - **Reinforced frame for snow and wind loads** - The frame design supports operation in harsh climates with heavy snow or strong wind loads without increased risk of micro-crack-related degradation. - **25-year power warranty at market standard** - The 15-year product and 25-year power warranty match the established segment standard, providing investment predictability comparable to other Tier-1 series. ## Cons - **Lower efficiency than PERC peers** - Efficiency of 19.4-20.5% trails comparable PERC series such as GCL-M10/54H (21.5%), RedSolar P series (21.52%), and Jinko JS-PERC (21.7%) by roughly 1-1.3 percentage points, meaning lower yield from the same roof area. - **No bifacial variant available** - The HiDM series does not offer bifacial modules, which on suitable surfaces (light-colored roofs, snow) can add several extra percentage points of yield - an option present in newer competitor series. - **PERC technology aging relative to TOPCon** - Introduced in 2018, the series relies solely on PERC cells, while Canadian Solar itself is now ramping TOPCon production offering higher efficiency and lower degradation - HiDM risks becoming a secondary offering in the manufacturer's portfolio over time. ## About this series The HiDM (High Density Mono PERC) series from Canadian Solar stands out for its unique high-density cell packing of monocrystalline PERC cells, which uses nearly the entire surface of the module and minimizes losses from gaps between cells. This approach translates into a real increase in energy yield from the same roof area, making the HiDM series particularly attractive for installations with limited mounting space, where every available square meter counts. The panels feature **better shading tolerance**, meaning reduced sensitivity to partial shading from chimneys, antennas, or neighboring buildings - a common issue in urban and suburban installations. Thanks to **lower internal current**, the modules achieve a **lower hot-spot temperature**, which increases operational safety and reduces the risk of cell degradation under harsh conditions. The design **minimizes the impact of micro-cracks** on performance, and the reinforced frame withstands heavy snow and wind loads, which matters in regions with harsh climates. The HiDM series works well both for rooftop installations on single-family homes and for smaller commercial systems, where reliability and maximum use of available space are the priority. ## Notable figures - Efficiency of 20.5% is 1.1pp above the \*\*PERC 0-400W\*\* median (19.4%) - 204.6 W/m² power density - 10.4 W/m² more than \*\*PERC 0-400W\*\* median (194.2 W/m²), more power per roof area - Temperature coefficient of -0.37%/°C matches the \*\*PERC 0-400W\*\* median - Weight of 19.2 kg (1.3 kg below \*\*PERC 0-400W\*\* median of 20.5 kg) allows easier transport and roof mounting - Ranked #11389 out of 14129 panels for efficiency in the database ## Questions ### What is the maximum power output of the Canadian Solar HiDM panel? Modules in the HiDM series reach a maximum power output of up to 420 Wp. This high output is achieved through densely packed monocrystalline PERC cells, which reduce losses in the gaps between cells and allow nearly the entire module surface to be used for energy production. ### What warranty comes with Canadian Solar HiDM panels? The manufacturer provides a 15-year product warranty and a 25-year power performance warranty. Canadian Solar is a Tier 1 manufacturer with a long track record in the market, which further increases confidence in warranty fulfillment throughout the system's operational lifetime. ### Are HiDM panels suitable for roofs partially shaded by a chimney? Yes, this is one of the series' key advantages. HiDM panels offer better shade tolerance than standard modules, meaning partial shading from a chimney, antenna, or neighboring building has less impact on the performance of the whole string. This makes them especially suitable for urban and suburban installations. ### How does HiDM technology differ from standard PERC panels? HiDM (High Density Mono PERC) refers to a denser arrangement of monocrystalline cells on the module surface, reducing dead space between cells. As a result, the same roof area yields more energy than with conventional PERC panels with standard cell spacing, which matters for installations with limited mounting space. ### Are HiDM panels safe against hot-spot overheating risk? Yes, thanks to lower internal current, HiDM modules run at a lower hot-spot temperature than many competing products. This reduces the risk of localized cell overheating and accelerated degradation, resulting in higher operational safety and a longer system lifespan. ### Can Canadian Solar HiDM panels withstand heavy snow loads? Yes, the HiDM series features a reinforced frame designed to withstand high snow and wind loads, making it a suitable choice for regions with harsh winter climates. The construction also minimizes the impact of microcracks on performance, increasing module durability under demanding weather conditions. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/Canadian_Solar-Datasheet-HiDM_CS1H-MS_EN-4eca07e478b3.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [JA Solar NS-300MH-72](https://comparepv.com/panel/ja-solar-ns-300mh-72) | 300 W | Cooler, lighter, +2.8 pp | | [PolyCrown Solar Tech NS-300MH-72](https://comparepv.com/panel/polycrown-solar-tech-ns-300mh-72) | 300 W | Cooler, lighter, +2.8 pp | | [JA Solar NS-330MH-80](https://comparepv.com/panel/ja-solar-ns-330mh-80) | 330 W | Cooler, lighter, +2.6 pp | | [PolyCrown Solar Tech NS-330MH-80](https://comparepv.com/panel/polycrown-solar-tech-ns-330mh-80) | 330 W | Cooler, lighter, +2.6 pp | | [Gamko New Energy GKA182M300W](https://comparepv.com/panel/gamko-new-energy-gka182m300w) | 300 W | -45 W, +2.5 pp, +5 yr warranty | | [Gamko New Energy GKA210M320W](https://comparepv.com/panel/gamko-new-energy-gka210m320w) | 320 W | Lighter, +2.5 pp, +5 yr warranty | | [Gamko New Energy GKA210M340W](https://comparepv.com/panel/gamko-new-energy-gka210m340w) | 340 W | Lighter, +2.5 pp, +5 yr warranty | | [Gamko New Energy GKA210M360W](https://comparepv.com/panel/gamko-new-energy-gka210m360w) | 360 W | Lighter, +2.5 pp, +5 yr warranty | | [Gamko New Energy GKA210M380W (1/4\*4\*38)](https://comparepv.com/panel/gamko-new-energy-gka210m380w-1-4-4-38) | 380 W | +35 W, +2.5 pp, +5 yr warranty | | [Gamko New Energy GKA210M380W (1/2\*4\*19)](https://comparepv.com/panel/gamko-new-energy-gka210m380w-1-2-4-19) | 380 W | +35 W, +2.5 pp, +5 yr warranty | | [Canadian Solar CS3K-290PB-AG](https://comparepv.com/panel/canadian-solar-cs3k-290pb-ag) | 290 W | -55 W, -3.3 pp, +5 yr warranty | | [Canadian Solar CS3K-295PB-AG](https://comparepv.com/panel/canadian-solar-cs3k-295pb-ag) | 295 W | -50 W, -3.0 pp, +5 yr warranty | | [Canadian Solar CS3K-300PB-AG](https://comparepv.com/panel/canadian-solar-cs3k-300pb-ag) | 300 W | -45 W, -2.7 pp, +5 yr warranty | | [Canadian Solar CS3K-305PB-AG](https://comparepv.com/panel/canadian-solar-cs3k-305pb-ag) | 305 W | -40 W, -2.4 pp, +5 yr warranty | | [Canadian Solar CS3K-310MB-AG](https://comparepv.com/panel/canadian-solar-cs3k-310mb-ag) | 310 W | -35 W, -2.1 pp, +5 yr warranty | | [Canadian Solar CS3K-315MB-AG](https://comparepv.com/panel/canadian-solar-cs3k-315mb-ag) | 315 W | Heavier, -1.8 pp, +5 yr warranty | | [Maxeon SPR-MAX3-400-COM](https://comparepv.com/panel/maxeon-spr-max3-400-com) | 400 W | Cooler, +2.1 pp, +15 yr warranty | --- Source: https://comparepv.com/panel/canadian-solar-cs1h-345ms Not in this file, on the page: a thirty-year output simulator and alternatives filtered by how closely they match these dimensions.