--- title: "Sunplus 740 740W Solar Panel - Specs & Review | ComparePV" description: "Sunplus 740 740W solar panel. Specs: 23.80% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/sunplus-740" updated: 2026-09-11 --- # Sunplus 740 Space saver, weak in heat 222 panels in the segment HJT 700-750 W ## Identity - **Manufacturer:** Sunplus - **Model:** 740 - **Series:** Hi-Max - **Rated power:** 740 W - **Cell technology:** HJT - **Bifacial:** yes ## How it compares Compared against segment HJT 700-750 W (222 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 740 W | 715 W | Strong - top 4% | | | Module efficiency | 23.80% | 23.02% | Strong - top 5% | 433 | | Power density | 238.2 | 230.2 | Strong - top 4% | 431 | | Temperature coefficient | -0.300 | -0.240 | Weak - bottom 2% | 6,093 | | Weight (kg) | 39.0 kg | 38.3 kg | Typical | | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 23.80% | 23.02% | Strong - top 5% | 433 | | Power density | 238.2 | 230.2 | Strong - top 4% | 431 | | Temperature coefficient | -0.300 | -0.240 | Weak - bottom 2% | 6,093 | | Weight per kWp | 52.7 | 53.6 | Typical | 6,344 | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Strengths - **238.2 watts per square metre** - Top 4% of the HJT 700-750 W segment, against a median of 230.2. Ranked 431st in the whole database. - **23.80% module efficiency** - Top 5% of the HJT 700-750 W segment, against a median of 23.02%. Ranked 433rd in the whole database. ### Watch out for - **-0.300 %/°C temperature coefficient** - Bottom 2% of the HJT 700-750 W segment, against a median of -0.240. Ranked 6,093rd in the whole database. - **Best for:** Commercial, utility-scale, shaded-installations and hot-climate. - **Not ideal for:** Hot climates. ## Specification ### Electrical - **Rated power (Pmax):** 740 W - **Efficiency:** 23.80 % - **Voltage at Pmax (Vmp):** 43.78 V - **Current at Pmax (Imp):** 16.78 A - **Open-circuit voltage (Voc):** 51.01 V - **Short-circuit current (Isc):** 17.70 A - **Max system voltage:** 1500 V ### Temperature - **Temperature coefficient of Pmax:** -0.300 %/degC - **Temperature coefficient of Voc:** -0.240 %/degC - **Temperature coefficient of Isc:** 0.040 %/degC - **NOCT:** 43 degC ### Cell and construction - **Cell type:** Monocrystalline - **Cell technology:** HJT - **Cell count:** 156 - **Bifacial:** yes ### Physical - **Length:** 2384 mm - **Width:** 1303 mm - **Thickness:** 35 mm - **Weight:** 39.0 kg - **Area:** 3.11 m2 - **Power density:** 238.2 Wp/m2 ### Warranty and degradation - **Performance warranty:** 30 years - **Output guaranteed at end of warranty:** 90.0 % - **First-year degradation:** 1.00 % - **Annual degradation:** 0.31 % - **Output after 30 years:** 666 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 433 of 14005 | | Power density | 431 of 14005 | | Temperature coefficient | 6093 of 14005 | | Weight | 6344 of 14005 | | Warranty | 21 of 14005 | ## About this series The Sunplus Hi-Max series focuses on maximizing energy yield even when the roof or ground is not ideal - in variable sunlight, partial shading, and in installations where long-term stability is crucial. The modules utilize modern half-cut cell technology and refined connections, minimizing losses and better handling micro-shading. This translates to more predictable energy production in real-world operating conditions, rather than just in a laboratory setting. A key feature of Hi-Max is the combination of **bifacial construction** with **glass-glass technology**, which improves resistance to environmental factors and supports long-term reliability. Additionally, **Micro Gap Design** is used, which enhances tolerance to shading and facilitates maintaining high efficiency in dense environments. This is a good choice for installers and investors seeking **high durability** in residential, commercial, and larger ground-mounted projects - particularly where hassle-free operation and reliable energy yield are important. ## Notable figures - At 23.8% efficiency, this panel is 0.8pp above typical \*\*HJT 700-750W\*\* modules (median: 23.0%) - Power density of 238.2 W/m² packs 8.0 W/m² more into the same footprint vs \*\*HJT 700-750W\*\* median (230.2 W/m²) - -0.30%/°C temperature coefficient - 0.06pp worse than \*\*HJT 700-750W\*\* median (-0.24%/°C), expect higher hot weather losses - Bifacial design (90% factor) captures reflected light - adds 4-14% yield on ground-mount or white roof - In the top 3% for efficiency among all HJT panels ## Questions ### How does HJT cell technology in Sunplus Hi-Max panels differ from classic PERC cells? HJT (heterojunction) cells combine a crystalline silicon layer with thin amorphous silicon layers, reducing thermal losses and improving efficiency at higher temperatures compared to PERC. In practice, Hi-Max panels lose power more slowly on hot days and perform better under variable irradiance, resulting in higher real-world annual energy yield. ### Are Sunplus Hi-Max panels suitable for installations with partial shading? Yes, this is one of the series' main strengths. The half-cut cell architecture combined with Micro Gap Design increases shade tolerance from chimneys, antennas, or trees, limiting the impact of individual cell power drops on the whole module string. As a result, energy production stays more stable even under difficult mounting conditions. ### What is the maximum power output of the Hi-Max series and what installations does it suit? Hi-Max panels reach up to 750 Wp, making them a strong choice for both large commercial rooftop installations and ground-mounted solar farms. High per-module power output reduces the number of panels needed to reach a target system capacity, lowering mounting structure and labor costs. ### What is bifacial construction and is it worth paying extra for Hi-Max double-sided panels? Bifacial construction means the panel generates energy from both the front and rear side, capturing light reflected off the ground surface. In the Hi-Max series this is combined with glass-glass technology, further improving module durability. The extra cost makes sense especially for ground-mount installations over light-colored surfaces or elevated racking, where rear-side gain can reach several percent additional yield. ### What is the power warranty on Sunplus Hi-Max panels? The Hi-Max series comes with a 30-year power warranty, well above the typical industry standard of 25 years. This extended coverage stems from the glass-glass construction, which protects the cells against moisture ingress and degradation better than standard back-sheet panels, resulting in a slower power decline over time. ### Are Hi-Max panels resistant to moisture and harsh weather conditions? Yes, thanks to glass-glass technology the module is sealed on both sides with glass layers instead of a standard rear polymer back-sheet, significantly reducing moisture penetration and protecting the cells from corrosion and micro-cracks. This construction helps the panels better withstand temperature swings, wind, and precipitation, maintaining stable performance throughout their service life. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/sunplus-725-750w-hjt-2384-1303-35-2-d72161ef6d3b.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [AIKO AIKO-A700-MAE78Dw](https://comparepv.com/panel/aiko-aiko-a700-mae78dw) | 700 W | -40 W, lighter, +1.2 pp | | [AIKO AIKO-A695-MAE78Dw](https://comparepv.com/panel/aiko-aiko-a695-mae78dw) | 695 W | -45 W, lighter, +1.1 pp | | [AIKO AIKO-A690-MAE78Dw](https://comparepv.com/panel/aiko-aiko-a690-mae78dw) | 690 W | -50 W, lighter, +0.9 pp | | [AIKO AIKO-A790-GRH78Dw](https://comparepv.com/panel/aiko-aiko-a790-grh78dw) | 790 W | +50 W, cooler, +0.8 pp | | [Trina Solar TSM-NEG21C.20Q-760](https://comparepv.com/panel/trina-solar-tsm-neg21c-20q-760) | 760 W | +20 W, cooler, +0.7 pp | | [AIKO AIKO-A785-GRH78Dw](https://comparepv.com/panel/aiko-aiko-a785-grh78dw) | 785 W | +45 W, cooler, +0.6 pp | | [Gokin GK-4-78HGBD-780M](https://comparepv.com/panel/gokin-gk-4-78hgbd-780m) | 780 W | +40 W, cooler, +0.5 pp | | [AIKO AIKO-A780-GRH78Dw](https://comparepv.com/panel/aiko-aiko-a780-grh78dw) | 780 W | +40 W, cooler, +0.5 pp | | [Jetion JT755SLk(B)](https://comparepv.com/panel/jetion-jt755slk-b) | 755 W | Cooler, lighter, +0.5 pp | | [Trina Solar TSM-NEG21C.20Q-755](https://comparepv.com/panel/trina-solar-tsm-neg21c-20q-755) | 755 W | +15 W, cooler, +0.5 pp | | [Sunplus 725](https://comparepv.com/panel/sunplus-725) | 725 W | -15 W, -0.5 pp | | [Sunplus 730](https://comparepv.com/panel/sunplus-730) | 730 W | -10 W, -0.3 pp | | [Sunplus 735](https://comparepv.com/panel/sunplus-735) | 735 W | Very close match | | [Sunplus 745](https://comparepv.com/panel/sunplus-745) | 745 W | Very close match | | [Sunplus 750](https://comparepv.com/panel/sunplus-750) | 750 W | +10 W, +0.3 pp | | [AIKO AIKO-A805-GRH78Dw](https://comparepv.com/panel/aiko-aiko-a805-grh78dw) | 805 W | +65 W, cooler, +1.3 pp | --- Source: https://comparepv.com/panel/sunplus-740 Not in this file, on the page: the I-V and temperature curves lifted from the manufacturer's datasheet, a thirty-year output simulator, a bifacial gain calculator and alternatives filtered by how closely they match these dimensions.