--- title: "SpolarPV SPV445-TM10-108 445W Solar Panel - Specs & Review | ComparePV" description: "SpolarPV SPV445-TM10-108 445W solar panel. Specs: 22.83% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/spolarpv-spv445-tm10-108" updated: 2026-09-11 --- # SpolarPV SPV445-TM10-108 Space saver, no clear weak spot 1,218 panels in the segment TOPCon 400-450 W ## Identity - **Manufacturer:** SpolarPV - **Model:** SPV445-TM10-108 - **Series:** SPV445-TM10-108 - **Rated power:** 445 W - **Cell technology:** TOPCon ## How it compares Compared against segment TOPCon 400-450 W (1218 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 445 W | 435 W | Strong - top 8% | | | Module efficiency | 22.83% | 22.00% | Strong - top 1% | 2,683 | | Power density | 228.2 | 220.2 | Strong - top 1% | 2,754 | | Temperature coefficient | -0.300 | -0.290 | Typical | 6,093 | | Weight (kg) | 21.5 kg | 22.0 kg | Strong - top 24% | | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 22.83% | 22.00% | Strong - top 1% | 2,683 | | Power density | 228.2 | 220.2 | Strong - top 1% | 2,754 | | Temperature coefficient | -0.300 | -0.290 | Typical | 6,093 | | Weight per kWp | 48.3 | 51.4 | Strong - top 24% | 2,192 | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Strengths - **228.2 watts per square metre** - Top 1% of the TOPCon 400-450 W segment, against a median of 220.2. Ranked 2,754th in the whole database. - **22.83% module efficiency** - Top 1% of the TOPCon 400-450 W segment, against a median of 22.00%. Ranked 2,683rd in the whole database. - **48.3 kg per kWp** - Top 24% of the TOPCon 400-450 W segment, against a median of 51.4. - **Best for:** Residential and shaded-installations. ## Specification ### Electrical - **Rated power (Pmax):** 445 W - **Efficiency:** 22.83 % - **Voltage at Pmax (Vmp):** 33.12 V - **Current at Pmax (Imp):** 13.44 A - **Open-circuit voltage (Voc):** 40.15 V - **Short-circuit current (Isc):** 14.37 A - **Max system voltage:** 1500 V ### Temperature - **Temperature coefficient of Pmax:** -0.300 %/degC - **Temperature coefficient of Voc:** -0.275 %/degC - **Temperature coefficient of Isc:** 0.045 %/degC - **NOCT:** 45 degC ### Cell and construction - **Cell type:** Monocrystalline - **Cell technology:** TOPCon - **Cell count:** 108 ### Physical - **Length:** 1721 mm - **Width:** 1133 mm - **Thickness:** 30 mm - **Weight:** 21.5 kg - **Area:** 1.95 m2 - **Power density:** 228.2 Wp/m2 ### Warranty and degradation - **Product warranty:** 12 years - **Performance warranty:** 30 years - **Output guaranteed at end of warranty:** 84.8 % - **First-year degradation:** 2.00 % - **Annual degradation:** 0.46 % - **Output after 30 years:** 377 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 2683 of 14005 | | Power density | 2754 of 14005 | | Temperature coefficient | 6093 of 14005 | | Weight | 2192 of 14005 | | Warranty | 21 of 14005 | ## About this series The SpolarPV SPV445-TM10-108 photovoltaic panel series utilizes an advanced technological platform based on the **M10 wafer format**, which significantly increases power density while maintaining compact module dimensions. The design, based on 108 **Half-Cut** cells, effectively reduces losses resulting from internal resistance and minimizes the risk of micro-cracks, which translates into a longer lifespan for the entire installation. A key distinguishing feature is the use of **Multi-Busbar (MBB) technology**, which not only optimizes the current flow path but also improves light absorption in difficult weather conditions, such as heavy cloud cover or low solar incidence angles. For investors looking for aesthetics and efficiency, this model offers a perfect balance, solving the problem of limited mounting space on residential rooftops. Unlike standard modules, the SPV445-TM10-108 is characterized by **high resistance to LID and PID phenomena**, guaranteeing stable energy yields over several decades. It is an ideal choice for prosumers expecting **maximum module efficiency** at a reasonable price, combining innovative cell architecture with high mechanical resistance to extreme snow and wind loads. ## Notable figures - At 22.8% efficiency, this panel is 0.8pp above typical \*\*TOPCon 400-450W\*\* modules (median: 22.0%) - Power density of 228.2 W/m² packs 8.0 W/m² more into the same footprint vs \*\*TOPCon 400-450W\*\* median (220.2 W/m²) - At -0.30%/°C, hot weather performance is typical for \*\*TOPCon 400-450W\*\* panels - In the top 19% for efficiency among all TOPCon panels ## Questions ### What warranty does the SpolarPV SPV445-TM10-108 come with and what does it cover? The SPV445-TM10-108 series includes a 12-year product warranty covering manufacturing defects and a 30-year linear power output warranty — a premium-tier commitment standard for TOPCon modules. The power warranty guarantees at least 87.4% of nominal output after 30 years. This is a key factor for residential prosumers calculating long-term return on investment from their PV installation. ### What is TOPCon technology used in the SPV445-TM10-108 and is it worth the premium? TOPCon (Tunnel Oxide Passivated Contact) is a next-generation cell architecture that outperforms PERC by adding a passivation layer that reduces electron recombination. The result is higher efficiency and better performance at elevated temperatures. For a typical residential rooftop of 30–40 m², this translates to several percentage points more annual energy yield compared to older technologies using the same roof area. ### Do the SPV445-TM10-108 panels perform well on cloudy days and in low-irradiance conditions? Yes. The Multi-Busbar (MBB) design improves absorption of diffuse light, which is common on overcast days. More busbars shorten current paths and enhance output under low sun angles — typical during morning, evening, and autumn months. TOPCon cells also have a lower temperature coefficient, which limits power losses during hot, sunny days compared to PERC-based modules. ### Is the SPV445-TM10-108 series suitable for a small pitched residential roof? Absolutely. The M10 wafer format combined with 108 half-cut cells delivers 445 Wp in a compact module footprint, making it easier to fit the right number of panels on a limited roof area. The half-cut cell design also reduces the impact of partial shading — from a chimney or dormer window — since splitting each cell means a shaded section no longer blocks the entire string. ### How does the SPV445-TM10-108 resist LID and PID degradation compared to standard panels? LID (Light Induced Degradation) causes a power drop shortly after commissioning, while PID (Potential Induced Degradation) results in long-term losses driven by high system voltage. The SPV445-TM10-108 benefits from TOPCon architecture and MBB technology, both of which significantly reduce susceptibility to both phenomena. This means more stable energy output over the system's lifetime and actual yields that align more closely with initial projections. ### Is SpolarPV a Tier 1 manufacturer and does that affect the reliability of the SPV445-TM10-108? SpolarPV is not currently listed as a Bloomberg Tier 1 manufacturer. Tier 1 status primarily reflects a company's financial capacity and production scale, not module quality directly. Before purchasing, it is advisable to confirm that local warranty service is available in your country and that the distributor provides adequate support for any claims within the 12-year product warranty period. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/SPV445-TM10-108-2d688926bc03.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [AIKO AIKO-A495-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a495-mce54mw) | 495 W | +50 W, cooler, +2.0 pp | | [AIKO AIKO-A490-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a490-mce54mw) | 490 W | +45 W, cooler, +1.7 pp | | [Suntech STP-NT11/48QGSF-490](https://comparepv.com/panel/suntech-stp-nt11-48qgsf-490) | 490 W | +45 W, cooler, +1.7 pp | | [JA Solar JAT54S40-485/LR](https://comparepv.com/panel/ja-solar-jat54s40-485-lr) | 485 W | +40 W, cooler, +1.5 pp | | [AIKO AIKO-A485-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a485-mce54mw) | 485 W | +40 W, cooler, +1.5 pp | | [Longi Solar LR7-54HJD-495M](https://comparepv.com/panel/longi-lr7-54hjd-495m) | 495 W | +50 W, cooler, +1.5 pp | | [AIKO AIKO-A485-MAH54Mw](https://comparepv.com/panel/aiko-aiko-a485-mah54mw) | 485 W | +40 W, cooler, +1.5 pp | | [SpolarPV SP310RHM6-54L](https://comparepv.com/panel/spolarpv-sp310rhm6-54l) | 310 W | -135 W, -7.0 pp, -5 yr warranty | | [SpolarPV SP350YHM6-54L](https://comparepv.com/panel/spolarpv-sp350yhm6-54l) | 350 W | -95 W, -4.9 pp, -5 yr warranty | | [SpolarPV SP370GHM6-54L](https://comparepv.com/panel/spolarpv-sp370ghm6-54l) | 370 W | -75 W, -3.9 pp, -5 yr warranty | | [SpolarPV SP380GHM6-54L](https://comparepv.com/panel/spolarpv-sp380ghm6-54l) | 380 W | -65 W, -3.4 pp, -5 yr warranty | | [SpolarPV SPV420-TM10-108](https://comparepv.com/panel/spolarpv-spv420-tm10-108) | 420 W | -25 W, -1.3 pp | | [SpolarPV SPV425-TM10-108](https://comparepv.com/panel/spolarpv-spv425-tm10-108) | 425 W | -20 W, -1.0 pp | | [SpolarPV SPV425-TM10-108BD](https://comparepv.com/panel/spolarpv-spv425-tm10-108bd) | 425 W | -20 W, heavier, -1.1 pp | | [SpolarPV SPV430-TM10-108](https://comparepv.com/panel/spolarpv-spv430-tm10-108) | 430 W | -15 W, -0.8 pp | | [SpolarPV SPV430-TM10-108BD](https://comparepv.com/panel/spolarpv-spv430-tm10-108bd) | 430 W | -15 W, heavier, -0.8 pp | | [Longi Solar LR7-54HJD-510M](https://comparepv.com/panel/longi-lr7-54hjd-510m) | 510 W | +65 W, cooler, +2.2 pp | --- Source: https://comparepv.com/panel/spolarpv-spv445-tm10-108 Not in this file, on the page: the I-V and temperature curves lifted from the manufacturer's datasheet, a thirty-year output simulator and alternatives filtered by how closely they match these dimensions.