--- title: "Techwise Solar TW-655HT 655W Solar Panel - Specs & Review | ComparePV" description: "Techwise Solar TW-655HT 655W solar panel. Specs: 21.09% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/techwise-solar-tw-655ht" updated: 2026-09-11 --- # Techwise Solar TW-655HT Light for its output, short guarantee 320 panels in the segment PERC 650-700 W ## Identity - **Manufacturer:** Techwise Solar - **Model:** TW-655HT - **Series:** Summit Series - **Rated power:** 655 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) | 655 W | 660 W | Weak - bottom 25% | | | Module efficiency | 21.09% | 21.25% | Weak - bottom 22% | 9,519 | | Power density | 210.9 | 212.5 | Weak - bottom 24% | 9,459 | | Temperature coefficient | -0.340 | -0.340 | Typical | 8,778 | | Weight (kg) | 32.9 kg | 34.5 kg | Strong - top 18% | | | Performance warranty | 25 yrs | 30 yrs | Weak - bottom 21% | 9,798 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 21.09% | 21.25% | Weak - bottom 22% | 9,519 | | Power density | 210.9 | 212.5 | Weak - bottom 24% | 9,459 | | Temperature coefficient | -0.340 | -0.340 | Typical | 8,778 | | Weight per kWp | 50.2 | 52.3 | Strong - top 18% | 3,676 | | Performance warranty | 25 yrs | 30 yrs | Weak - bottom 21% | 9,798 | ### Strengths - **50.2 kg per kWp** - Top 18% of the PERC 650-700 W segment, against a median of 52.3. ### Watch out for - **25 year performance warranty** - Bottom 21% of the PERC 650-700 W segment, against a median of 30 yrs. - **21.09% module efficiency** - Bottom 22% of the PERC 650-700 W segment, against a median of 21.25%. - **210.9 watts per square metre** - Bottom 24% of the PERC 650-700 W segment, against a median of 212.5. - **Best for:** Commercial, utility-scale, shaded-installations and hot-climate. - **Not ideal for:** Owners who want a long output guarantee, tight roof space and roofs where every square metre has to count. ## Specification ### Electrical - **Rated power (Pmax):** 655 W - **Efficiency:** 21.09 % - **Voltage at Pmax (Vmp):** 37.67 V - **Current at Pmax (Imp):** 17.39 A - **Open-circuit voltage (Voc):** 45.49 V - **Short-circuit current (Isc):** 18.44 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:** 44 degC ### Cell and construction - **Cell type:** Monocrystalline - **Cell technology:** PERC - **Cell count:** 132 ### Physical - **Length:** 2384 mm - **Width:** 1303 mm - **Thickness:** 35 mm - **Weight:** 32.9 kg - **Area:** 3.11 m2 - **Power density:** 210.9 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:** 537 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 9519 of 14005 | | Power density | 9459 of 14005 | | Temperature coefficient | 8778 of 14005 | | Weight | 3676 of 14005 | | Warranty | 9798 of 14005 | ## About this series The Techwise Solar Summit Series is designed for installations where maximizing energy yield from a limited area and ensuring stable performance over many years are paramount. The modules in this series utilize a **half-cut** architecture, which minimizes internal losses and improves panel performance under partial shading - a crucial factor in installations with features such as chimneys, skylights, or HVAC systems. Depending on the variant, **bifacial** options are available, allowing for the recovery of additional energy from reflected light from the ground, which is particularly beneficial for ground-mounted and flat-roof projects. The use of a **multi busbar** multi-contact technology promotes better current collection and increases resistance to micro-cracks during daily operation and transportation. The Summit Series also emphasizes **optimal performance at high temperatures** and under less direct sunlight, which is relevant in the Polish climate. This makes it a suitable choice for installers, investors in commercial and industrial (C&I) projects, and PV farms who expect predictable results and the flexibility to choose modules that fit their project requirements. ## Notable figures - Efficiency of 21.1% matches the \*\*PERC 650-700W\*\* median - At 210.9 W/m² power density, roof space requirements are typical for \*\*PERC 650-700W\*\* panels - At -0.34%/°C, hot weather performance is typical for \*\*PERC 650-700W\*\* panels - At 32.9 kg, this panel is 1.6 kg lighter than \*\*PERC 650-700W\*\* median (34.5 kg) - easier handling during installation - #9519 for efficiency, #8778 for temperature performance out of 14005 panels ## Questions ### What is the maximum power output of the Techwise Solar Summit Series panel? Summit Series modules reach a maximum power output of up to 670 Wp. This high unit power means fewer panels are needed to reach a target system size, reducing mounting structure costs and installation time, especially on large rooftop and ground-mount projects. ### What warranty does Techwise Solar offer on the Summit Series? The manufacturer provides a 12-year product warranty and a 25-year power performance warranty. This means the module is expected to maintain its rated energy output for over two decades, which is an important factor when calculating the return on investment of a PV installation. ### What is TOPCon technology in the Summit Series and is it better than PERC? TOPCon (Tunnel Oxide Passivated Contact) is a newer generation of silicon cell technology that reduces carrier recombination through an additional passivation layer. In practice this results in higher module efficiency and better performance at high temperatures compared to older PERC technology, which matters during hot Polish summers. ### Are Summit Series panels suitable for roofs with chimneys or dormers? Yes, thanks to the half-cut architecture the module is split into smaller cell sections, so partial shading from a chimney, antenna, or dormer causes a smaller drop in output than with conventional full-cell panels. This design reduces the impact of typical roof obstructions on overall system yield. ### Is the Summit Series a bifacial panel? No, in this described configuration the Summit Series operates as a monofacial (one-sided) panel rather than bifacial. It's worth checking the specific model within the line, as the manufacturer also offers bifacial variants of this series in other configurations, intended for example for ground-mount installations. ### How does multi busbar technology in the Summit Series differ from standard panels? Multi busbar means a higher number of thin current-collecting ribbons on the cell surface compared to classic 3-4 busbar designs. This results in more even current collection, lower risk of microcracks during transport and operation, and better mechanical resistance to loads such as wind and snow. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/tw-670ht-en-f2ca30e74b9a.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [AIKO AIKO-A650-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a650-mae72mw) | 650 W | Cooler, lighter, +4.1 pp | | [AIKO AIKO-A680-MDE72Mw](https://comparepv.com/panel/aiko-aiko-a680-mde72mw) | 680 W | Cooler, +4.1 pp, +5 yr warranty | | [AIKO AIKO-A675-MDE72Mw](https://comparepv.com/panel/aiko-aiko-a675-mde72mw) | 675 W | Cooler, +3.9 pp, +5 yr warranty | | [AIKO AIKO-A645-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a645-mae72mw) | 645 W | Cooler, lighter, +3.9 pp | | [AIKO AIKO-A700-MAE78Dw](https://comparepv.com/panel/aiko-aiko-a700-mae78dw) | 700 W | Cooler, +3.9 pp, +5 yr warranty | | [AIKO AIKO-A695-MAE78Dw](https://comparepv.com/panel/aiko-aiko-a695-mae78dw) | 695 W | Cooler, +3.8 pp, +5 yr warranty | | [AIKO AIKO-G670-MCH72Mw](https://comparepv.com/panel/aiko-aiko-g670-mch72mw) | 670 W | Cooler, +3.7 pp, +5 yr warranty | | [Techwise Solar TW-650HT](https://comparepv.com/panel/techwise-solar-tw-650ht) | 650 W | Very close match | | [Techwise Solar TW-660HT](https://comparepv.com/panel/techwise-solar-tw-660ht) | 660 W | Very close match | | [Techwise Solar TW-665HT](https://comparepv.com/panel/techwise-solar-tw-665ht) | 665 W | +10 W, +0.3 pp | | [Techwise Solar TW-670HT](https://comparepv.com/panel/techwise-solar-tw-670ht) | 670 W | +15 W, +0.5 pp | | [Techwise Solar TW-720HT-01-700W](https://comparepv.com/panel/techwise-solar-tw-720ht-01-700w) | 700 W | +45 W, heavier, +5 yr warranty | | [Techwise Solar TW-720HT-01-705W](https://comparepv.com/panel/techwise-solar-tw-720ht-01-705w) | 705 W | +50 W, heavier, +5 yr warranty | | [Techwise Solar TW-720HT-01-710W](https://comparepv.com/panel/techwise-solar-tw-720ht-01-710w) | 710 W | +55 W, heavier, +1.1 pp | | [Techwise Solar TW-720HT-01-715W](https://comparepv.com/panel/techwise-solar-tw-720ht-01-715w) | 715 W | +60 W, heavier, +1.3 pp | | [Techwise Solar TW-720HT-01-720W](https://comparepv.com/panel/techwise-solar-tw-720ht-01-720w) | 720 W | +65 W, heavier, +1.4 pp | | [AIKO AIKO-A805-GRH78Dw](https://comparepv.com/panel/aiko-aiko-a805-grh78dw) | 805 W | +150 W, cooler, +4.0 pp | --- Source: https://comparepv.com/panel/techwise-solar-tw-655ht Not in this file, on the page: a thirty-year output simulator and alternatives filtered by how closely they match these dimensions.