--- title: "Trina Solar TSM-DE21-670W 670W Solar Panel - Specs & Review | ComparePV" description: "Trina Solar TSM-DE21-670W 670W solar panel. Specs: 21.50% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/trina-solar-co-ltd-tsm-de21-670w" updated: 2026-09-11 --- # Trina Solar TSM-DE21-670W Light for its output, short guarantee 320 panels in the segment PERC 650-700 W ## Identity - **Manufacturer:** Trina Solar - **Model:** TSM-DE21-670W - **Series:** Vertex TSM-DE21 650-675W - **Rated power:** 670 W - **Cell technology:** PERC ## How it compares Compared against segment PERC 650-700 W (320 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 670 W | 660 W | Strong - top 18% | | | Module efficiency | 21.50% | 21.25% | Typical | 7,958 | | Power density | 215.7 | 212.5 | Strong - top 18% | 7,644 | | Temperature coefficient | -0.340 | -0.340 | Typical | 8,778 | | Weight (kg) | 32.3 kg | 34.5 kg | Strong - top 3% | | | Performance warranty | 25 yrs | 30 yrs | Weak - bottom 21% | 9,798 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 21.50% | 21.25% | Typical | 7,958 | | Power density | 215.7 | 212.5 | Strong - top 18% | 7,644 | | Temperature coefficient | -0.340 | -0.340 | Typical | 8,778 | | Weight per kWp | 48.2 | 52.3 | Strong - top 3% | 2,104 | | Performance warranty | 25 yrs | 30 yrs | Weak - bottom 21% | 9,798 | ### Strengths - **48.2 kg per kWp** - Top 3% of the PERC 650-700 W segment, against a median of 52.3. Ranked 2,104th in the whole database. - **215.7 watts per square metre** - Top 18% of the PERC 650-700 W segment, against a median of 212.5. ### Watch out for - **25 year performance warranty** - Bottom 21% of the PERC 650-700 W segment, against a median of 30 yrs. - **Best for:** Commercial and utility-scale. - **Not ideal for:** Owners who want a long output guarantee. ## Specification ### Electrical - **Rated power (Pmax):** 670 W - **Efficiency:** 21.50 % - **Voltage at Pmax (Vmp):** 38.20 V - **Current at Pmax (Imp):** 17.55 A - **Open-circuit voltage (Voc):** 46.10 V - **Short-circuit current (Isc):** 18.62 A - **Max system voltage:** 1500 V ### Temperature - **Temperature coefficient of Pmax:** -0.340 %/degC - **Temperature coefficient of Voc:** -0.250 %/degC - **Temperature coefficient of Isc:** 0.040 %/degC - **NOCT:** 43 degC ### Cell and construction - **Cell type:** Monocrystalline - **Cell technology:** PERC - **Cell count:** 132 ### Physical - **Length:** 2384 mm - **Width:** 1303 mm - **Thickness:** 33 mm - **Weight:** 32.3 kg - **Area:** 3.11 m2 - **Power density:** 215.7 Wp/m2 ### Warranty and degradation - **Product warranty:** 12 years - **Performance warranty:** 25 years - **Output guaranteed at end of warranty:** 84.8 % - **First-year degradation:** 2.00 % - **Annual degradation:** 0.55 % - **Output after 30 years:** 550 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 7958 of 14005 | | Power density | 7644 of 14005 | | Temperature coefficient | 8778 of 14005 | | Weight | 2104 of 14005 | | Warranty | 9798 of 14005 | ## About this series Trina Solar Vertex TSM-DE21 650-675W series is designed to maximize returns in large-scale installations-where every meter of construction and every stage of installation matters. The modules feature **210 mm wafer-based monocrystalline PERC cells** and an optimized cell-level architecture, contributing to high efficiency without complicating the design. In practice, it distinguishes itself through the **low-voltage working concept**, simplifying the construction of efficient string layouts within common system configurations. This directly translates to **BOS cost reduction**-fewer components for both structure and cabling, along with more efficient logistics for large-scale projects. The modules perform well under harsh conditions and high temperatures, effectively stabilizing energy production during transition seasons. This makes them an ideal choice for utility-scale and commercial/industrial projects, as well as any application where **high power output per module** and predictable system yield are top priorities. ## Notable figures - At 21.5% efficiency, this panel is on par with typical \*\*PERC 650-700W\*\* modules - 215.7 W/m² power density - 3.2 W/m² more than \*\*PERC 650-700W\*\* median (212.5 W/m²), more power per roof area - At -0.34%/°C, hot weather performance is typical for \*\*PERC 650-700W\*\* panels - Weight of 32.3 kg (2.2 kg below \*\*PERC 650-700W\*\* median of 34.5 kg) allows easier transport and roof mounting - In the top 57% for efficiency among all PERC panels ## Questions ### Is the Trina Solar Vertex TSM-DE21 650-675W series still available for purchase? No, the TSM-DE21 650-675W series has been discontinued from Trina Solar's active production lineup. The panel may still be found through remaining distributor stock or the secondary market, and the manufacturer's 25-year power warranty and 12-year product warranty remain valid for already-installed modules. Before buying, verify the production date and current service status with your distributor, since newer Trina series (e.g. Vertex N) have replaced this model in the current lineup. ### What is the low-voltage design concept in the Vertex TSM-DE21 modules and what does it mean for an investor? Thanks to a 210 mm wafer cell architecture and optimized cell count per module, the TSM-DE21 delivers high wattage at a comparatively low operating string voltage. This allows longer strings without exceeding inverter voltage limits, directly cutting cabling, mounting structure, and installation labor costs (BoS). For large-scale ground-mount and commercial projects, this translates into lower CAPEX per installed kWp. ### Are Trina Vertex TSM-DE21 675W panels suitable for a residential pitched roof? Technically yes, but it's rarely the practical choice. The module measures roughly 2384x1304 mm and weighs about 32 kg, making it large and heavy by typical rafter-mounted residential standards. This series was designed for solar farms, commercial, and industrial installations where maximizing power per square meter on flat roofs or ground mounts matters most, rather than for standard residential prosumer installations. ### What warranty applies to Trina Solar Vertex TSM-DE21 650-675W modules? The manufacturer provides a 12-year product warranty covering material and workmanship defects, along with a 25-year linear power output warranty. Trina Solar is a Tier 1 manufacturer headquartered in China, which in practice means financial stability and a realistic ability to honor warranty claims over the long operating lifespan of the installation. ### How do TSM-DE21 modules perform in low irradiance and high temperature conditions? The monocrystalline PERC cells used in this series show good spectral response under low irradiance, limiting production drops on cloudy days and during morning/evening hours. A refined interconnection architecture combined with a low power temperature coefficient helps stabilize energy yield in summer, when cell temperatures rise above Standard Test Conditions (STC), resulting in more predictable annual output. ### How do the PERC cells in the TSM-DE21 differ from bifacial modules in other Trina series? The TSM-DE21 uses monofacial PERC cells built on 210 mm wafers, optimized for maximum power from a single front surface without rear-side light capture. Unlike bifacial series, it doesn't require reflective ground surfaces or extra mounting clearance, making it well suited to standard, tightly-spaced rows in utility-scale PV farms where maximum unit power output is the priority rather than additional rear-side gain. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/dt-m-0012-f-datasheet-vertex-de21-en-2024-b-bbe40dec4049.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [AIKO AIKO-A650-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a650-mae72mw) | 650 W | Cooler, lighter, +3.7 pp | | [AIKO AIKO-A680-MDE72Mw](https://comparepv.com/panel/aiko-aiko-a680-mde72mw) | 680 W | Cooler, +3.7 pp, +5 yr warranty | | [AIKO AIKO-A675-MDE72Mw](https://comparepv.com/panel/aiko-aiko-a675-mde72mw) | 675 W | Cooler, +3.5 pp, +5 yr warranty | | [AIKO AIKO-A645-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a645-mae72mw) | 645 W | Cooler, lighter, +3.5 pp | | [AIKO AIKO-A700-MAE78Dw](https://comparepv.com/panel/aiko-aiko-a700-mae78dw) | 700 W | Cooler, +3.5 pp, +5 yr warranty | | [AIKO AIKO-A695-MAE78Dw](https://comparepv.com/panel/aiko-aiko-a695-mae78dw) | 695 W | Cooler, +3.4 pp, +5 yr warranty | | [AIKO AIKO-G670-MCH72Mw](https://comparepv.com/panel/aiko-aiko-g670-mch72mw) | 670 W | Cooler, +3.3 pp, +5 yr warranty | | [Trina Solar TSM-DEG21C.20-645](https://comparepv.com/panel/trina-solar-co-ltd-tsm-deg21c-20-645) | 645 W | Heavier, -0.7 pp, +5 yr warranty | | [Trina Solar TSM-DEG21C.20-650](https://comparepv.com/panel/trina-solar-co-ltd-tsm-deg21c-20-650) | 650 W | Heavier, -0.6 pp, +5 yr warranty | | [Trina Solar TSM-DE21-655W](https://comparepv.com/panel/trina-solar-co-ltd-tsm-de21-655w) | 655 W | -15 W, -0.4 pp | | [Trina Solar TSM-DE21-660W](https://comparepv.com/panel/trina-solar-co-ltd-tsm-de21-660w) | 660 W | -10 W, -0.3 pp | | [Trina Solar TSM-DE21-665W](https://comparepv.com/panel/trina-solar-co-ltd-tsm-de21-665w) | 665 W | Very close match | | [Trina Solar TSM-DE21-675W](https://comparepv.com/panel/trina-solar-co-ltd-tsm-de21-675w) | 675 W | Very close match | | [AIKO AIKO-A805-GRH78Dw](https://comparepv.com/panel/aiko-aiko-a805-grh78dw) | 805 W | +135 W, cooler, +3.6 pp | | [AIKO AIKO-A800-GRH78Dw](https://comparepv.com/panel/aiko-aiko-a800-grh78dw) | 800 W | +130 W, cooler, +3.4 pp | | [AIKO AIKO-A795-GRH78Dw](https://comparepv.com/panel/aiko-aiko-a795-grh78dw) | 795 W | +125 W, cooler, +3.3 pp | --- Source: https://comparepv.com/panel/trina-solar-co-ltd-tsm-de21-670w Not in this file, on the page: a thirty-year output simulator and alternatives filtered by how closely they match these dimensions.