--- title: "Axitec AC-590TGB/144TS 590W Solar Panel - Specs & Review | ComparePV" description: "Axitec AC-590TGB/144TS 590W solar panel. Specs: 22.84% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/axitec-ac-590tgb-144ts" updated: 2026-09-11 --- # Axitec AC-590TGB/144TS Efficiency leader, weak in heat 1,018 panels in the segment TOPCon 550-600 W ## Identity - **Manufacturer:** Axitec - **Model:** AC-590TGB/144TS - **Series:** AXIbiperfect GXXL TS - **Rated power:** 590 W - **Cell technology:** TOPCon - **Bifacial:** yes ## How it compares Compared against segment TOPCon 550-600 W (1018 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 590 W | 580 W | Strong - top 18% | | | Module efficiency | 22.84% | 22.44% | Strong - top 15% | 2,617 | | Power density | 228.4 | 224.4 | Strong - top 17% | 2,598 | | Temperature coefficient | -0.310 | -0.290 | Weak - bottom 10% | 8,005 | | Weight (kg) | 31.2 kg | 31.2 kg | Typical | | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 22.84% | 22.44% | Strong - top 15% | 2,617 | | Power density | 228.4 | 224.4 | Strong - top 17% | 2,598 | | Temperature coefficient | -0.310 | -0.290 | Weak - bottom 10% | 8,005 | | Weight per kWp | 52.9 | 53.8 | Typical | 6,589 | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Strengths - **22.84% module efficiency** - Top 15% of the TOPCon 550-600 W segment, against a median of 22.44%. - **228.4 watts per square metre** - Top 17% of the TOPCon 550-600 W segment, against a median of 224.4. ### Watch out for - **-0.310 %/°C temperature coefficient** - Bottom 10% of the TOPCon 550-600 W segment, against a median of -0.290. - **Best for:** Commercial and utility-scale. - **Not ideal for:** Hot climates. ## Specification ### Electrical - **Rated power (Pmax):** 590 W - **Efficiency:** 22.84 % - **Voltage at Pmax (Vmp):** 44.37 V - **Current at Pmax (Imp):** 13.30 A - **Open-circuit voltage (Voc):** 52.31 V - **Short-circuit current (Isc):** 14.23 A - **Max system voltage:** 1500 V ### Temperature - **Temperature coefficient of Pmax:** -0.310 %/degC - **Temperature coefficient of Voc:** -0.260 %/degC - **Temperature coefficient of Isc:** 0.046 %/degC - **NOCT:** 45 degC ### Cell and construction - **Cell type:** Monocrystalline - **Cell technology:** TOPCon - **Cell count:** 144 - **Bifacial:** yes - **Bifacial gain:** 30.00 ### Physical - **Length:** 2278 mm - **Width:** 1134 mm - **Thickness:** 30 mm - **Weight:** 31.2 kg - **Area:** 2.58 m2 - **Power density:** 228.4 Wp/m2 ### Warranty and degradation - **Product warranty:** 30 years - **Performance warranty:** 30 years - **Output guaranteed at end of warranty:** 87.4 % - **First-year degradation:** 1.00 % - **Annual degradation:** 0.40 % - **Output after 30 years:** 516 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 2617 of 14005 | | Power density | 2598 of 14005 | | Temperature coefficient | 8005 of 14005 | | Weight | 6589 of 14005 | | Warranty | 21 of 14005 | ## Pros - **Premium-grade temperature coefficient** - Pmax is rated at -0.31%/°C, outperforming typical PERC modules (-0.35 to -0.40%/°C). At a summer cell operating temperature of 65°C, this translates to a real-world energy yield gain of 3–4% over older technology on hot days. - **30-year linear power output warranty** - The manufacturer guarantees ≥97% of rated power after Year 1, degradation of ≤0.4%/year in Years 2–30, and a minimum of 87.4% of nominal power after 30 years. The industry standard (Trina, JA Solar, LONGi) is typically 25 years with an 84.8% end-of-warranty floor — Axitec offers a longer horizon and a higher performance threshold. - **Glass-glass construction eliminates LID/LeTID** - The backsheet-free laminate (2 mm glass on both sides) blocks moisture ingress and eliminates the PID degradation mechanism. N-type TOPCon cells are inherently free of the Light Induced Degradation (LID) effect characteristic of PERC, directly resulting in more stable energy production during the first years of operation. - **Bifacial gain of up to ~30% under favorable conditions** - At a ground albedo of 0.4 (light gravel, concrete, or snow), the module generates up to 30% additional energy from the rear cell surface — a figure confirmed by the manufacturer's datasheet. For ground-mounted systems and carport installations with light-colored surfaces, this yields a materially better LCOE compared to monofacial modules of the same STC rating. - **Efficiency of up to 22.84% at the top of the segment** - The peak efficiency of 22.84% matches the closest peer, DAH DHN-72X16/DG(BB) (22.84%), and exceeds both Horay Solar HS 182-144 (22.80%) and Talesun TM7G72M (22.80%). The series is fully competitive with its nearest rivals on technical merit, while being backed by a credible, 25-year-old German-headquartered brand. ## Cons - **Not listed as a BNEF Tier-1 bankable manufacturer** - Based on manufacturer data and independent analysis, Axitec does not appear on the BloombergNEF Tier-1 Bankable Manufacturers list as of Q1 2026. For large commercial installations financed through non-recourse debt or leasing structures, lenders and investment funds may require additional payment insurance or exclude the manufacturer from their approved component lists, increasing the overall cost of project financing. ## About this series The Axitec AXIbiperfect GXXL TS series represents the latest standard in bifacial technology, combining **glass-glass** durability with high N-type cell efficiency. Thanks to the use of innovative **TOPCon technology**, these modules minimize energy losses and offer exceptional performance even in low light conditions. A key advantage of the series is its construction, which eliminates the risk of degradation caused by moisture or micro-cracks, resulting in a significantly longer system lifespan. The use of **bifacial gain** allows for generating additional energy from radiation reflected from the ground, making them an ideal choice for ground-mounted installations and commercial carports. These panels solve the problem of rapid power decline over time, offering investors financial stability and the highest degree of investment security. Compared to standard monofacial modules, AXIbiperfect GXXL TS stands out with its **increased mechanical resistance** and an excellent temperature coefficient, which guarantees high production even during summer heat. This solution is dedicated to professionals looking for premium-class components that combine aesthetics with uncompromising durability in harsh environmental conditions. ## Notable figures - At 22.8% efficiency, this panel is on par with typical \*\*TOPCon 550-600W\*\* modules - Power density of 228.4 W/m² packs 4.0 W/m² more into the same footprint vs \*\*TOPCon 550-600W\*\* median (224.4 W/m²) - At -0.31%/°C, loses 0.02pp more power per degree than \*\*TOPCon 550-600W\*\* median (-0.29%/°C) - 80% bifaciality enables rear-side power generation, boosting yield by 4-12% on reflective surfaces - In the top 19% for efficiency among all TOPCon panels ## Questions ### How much more energy does the Axitec AXIbiperfect GXXL TS produce thanks to bifacial technology? The AXIbiperfect GXXL TS can generate up to 30% more energy than a conventional monofacial module, as the rear side of the cells absorbs irradiance reflected from the surface beneath the array. The actual bifacial gain depends heavily on the albedo of the underlying surface: light-colored gravel, white roofing membranes, and pale concrete floors yield the best results. In ground-mounted installations with adequate clearance height, this translates directly into higher annual energy yield and a faster return on investment. ### What warranty applies to the Axitec AXIbiperfect GXXL TS panels? The manufacturer provides a 30-year product warranty and a 30-year linear power output warranty. After three decades of operation, the module must retain at least 87.4% of its nominal power rating of 590 Wp. This is one of the longest warranty packages available on the market, significantly exceeding the standard 12–25 years offered by most competitors, and represents a compelling argument when calculating the financial viability of large-scale installations. ### Do the Axitec AXIbiperfect GXXL TS panels suffer significant power losses during summer heat? Thermal losses are relatively low. The temperature coefficient for Pmax is −0.31%/°C, meaning that for every 10°C rise in module temperature above 25°C, output drops by only approximately 3.1%. This compares favorably to older mono PERC modules and ensures that the GXXL TS series maintains high production even during sunny, hot midday hours — a difference that becomes clearly visible in inverter data logs. ### Why does the AXIbiperfect GXXL TS use a glass-glass construction instead of glass-backsheet? A glass-glass laminate eliminates the primary failure modes of conventional backsheet modules: moisture ingress, delamination, and microcracks induced by thermal stress cycling. This results in a slower annual degradation rate and greater mechanical resilience under snow and wind loads. For installations designed to operate for 25–30 years without costly module replacement, this represents a significant quality advantage — particularly in harsh environmental conditions. ### What types of installations are best suited for the Axitec AXIbiperfect GXXL TS 590 W? The series is purpose-built for commercial and industrial applications. With dimensions of 2278×1134 mm and a weight of 31.2 kg, it requires appropriate lifting and mounting equipment, making it best suited for ground-mounted solar farms, carports, parking canopies, and large flat rooftops. Thanks to bifacial technology, ground-mounted systems with high-albedo surfaces achieve noticeably higher energy yields compared to equivalent systems based on monofacial modules. ### Is Axitec a Tier 1 manufacturer for the AXIbiperfect GXXL TS? Axitec is not currently listed as a Tier 1 manufacturer according to Bloomberg NEF; however, it is a well-established European manufacturer headquartered in Germany with a long track record of supplying the European market. The GXXL TS series modules carry IEC certifications and are backed by a 30-year linear power warranty provided directly by the manufacturer. For investors seeking premium quality outside the circle of global volume leaders, Axitec represents a solid, well-documented alternative. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/DB_144zlg_biperfect_GXXL_TS_MiA_EN-5b906f78c833.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [Longi Solar LR7-60HVH-560M](https://comparepv.com/panel/longi-lr7-60hvh-560m) | 560 W | Cooler, lighter, +2.0 pp | | [AIKO AIKO-A640-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a640-mae72mw) | 640 W | +50 W, cooler, +2.0 pp | | [Longi Solar LR7-60HVH-555M](https://comparepv.com/panel/longi-lr7-60hvh-555m) | 555 W | Cooler, lighter, +1.8 pp | | [AIKO AIKO-A635-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a635-mae72mw) | 635 W | +45 W, cooler, +1.8 pp | | [AIKO AIKO-A630-MAH72Dw](https://comparepv.com/panel/aiko-aiko-a630-mah72dw) | 630 W | +40 W, cooler, +1.6 pp | | [Longi Solar LR7-60HVHL-550M](https://comparepv.com/panel/longi-lr7-60hvhl-550m) | 550 W | Cooler, lighter, +1.6 pp | | [Axitec AC-530MBT/144V](https://comparepv.com/panel/axitec-ac-530mbt-144v) | 530 W | -60 W, -2.3 pp, -5 yr warranty | | [Axitec AC-535MBT/144V](https://comparepv.com/panel/axitec-ac-535mbt-144v) | 535 W | -55 W, -2.1 pp, -5 yr warranty | | [Axitec AC-540MBT/144V](https://comparepv.com/panel/axitec-ac-540mbt-144v) | 540 W | -50 W, -1.9 pp, -5 yr warranty | | [Axitec AC-545MBT/144V](https://comparepv.com/panel/axitec-ac-545mbt-144v) | 545 W | -45 W, -1.8 pp, -5 yr warranty | | [Axitec AC-550MBT/144V](https://comparepv.com/panel/axitec-ac-550mbt-144v) | 550 W | -40 W, -1.6 pp, -5 yr warranty | | [Axitec AC-555MBT/144V](https://comparepv.com/panel/axitec-ac-555mbt-144v) | 555 W | Hotter, -1.4 pp, -5 yr warranty | | [Axitec AC-570TGB/144TS](https://comparepv.com/panel/axitec-ac-570tgb-144ts) | 570 W | -20 W, -0.8 pp | | [Axitec AC-575TGB/144TS](https://comparepv.com/panel/axitec-ac-575tgb-144ts) | 575 W | -15 W, -0.6 pp | | [Axitec AC-580TGB/144TS](https://comparepv.com/panel/axitec-ac-580tgb-144ts) | 580 W | -10 W, -0.4 pp | | [Axitec AC-585TGB/144TS](https://comparepv.com/panel/axitec-ac-585tgb-144ts) | 585 W | Very close match | | [AIKO AIKO-A650-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a650-mae72mw) | 650 W | +60 W, cooler, +2.4 pp | --- Source: https://comparepv.com/panel/axitec-ac-590tgb-144ts 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.