--- title: "Phono Solar PS400M4-22/WH Solar Panel: Specs & Datasheet | ComparePV" description: "Phono Solar PS400M4-22/WH solar panel. Specs: 19.98% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/phono-solar-ps400m4-22-wh" image: "https://comparepv.com/og/panel/phono-solar-ps400m4-22-wh.png" updated: 2026-09-11 --- # Phono Solar PS400M4-22/WH Middle of its segment, modest efficiency 954 panels in the segment PERC 400-450 W ## Identity - **Manufacturer:** Phono Solar - **Model:** PS400M4-22/WH - **Series:** TWINPLUS MODULE SERIES - **Rated power:** 400 W - **Cell technology:** PERC ## How it compares Compared against segment PERC 400-450 W (954 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 400 W | 410 W | Weak - bottom 9% | | | Module efficiency | 19.98% | 20.60% | Weak - bottom 12% | 12,377 | | Power density | 199.8 | 206.2 | Weak - bottom 12% | 12,332 | | Temperature coefficient | -0.350 | -0.350 | Typical | 10,489 | | Weight (kg) | 23.0 kg | 22.0 kg | Weak - bottom 22% | | | Performance warranty | 25 yrs | 25 yrs | Typical | 9,912 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 19.98% | 20.60% | Weak - bottom 12% | 12,377 | | Power density | 199.8 | 206.2 | Weak - bottom 12% | 12,332 | | Temperature coefficient | -0.350 | -0.350 | Typical | 10,489 | | Weight per kWp | 57.5 | 53.0 | Weak - bottom 22% | 11,333 | | Performance warranty | 25 yrs | 25 yrs | Typical | 9,912 | ### Watch out for - **19.98% module efficiency** - Bottom 12% of the PERC 400-450 W segment, against a median of 20.60%. - **199.8 watts per square metre** - Bottom 12% of the PERC 400-450 W segment, against a median of 206.2. - **57.5 kg per kWp** - Bottom 22% of the PERC 400-450 W segment, against a median of 53.0. - **Best for:** Residential, commercial, shaded-installations and hot-climate. - **Not ideal for:** Tight roof space, roofs where every square metre has to count and weight-limited structures. ## Specification ### Electrical - **Rated power (Pmax):** 400 W - **Efficiency:** 19.98 % - **Voltage at Pmax (Vmp):** 38.06 V - **Current at Pmax (Imp):** 10.51 A - **Open-circuit voltage (Voc):** 45.25 V - **Short-circuit current (Isc):** 11.01 A - **Max system voltage:** 1500 V ### Temperature - **Temperature coefficient of Pmax:** -0.350 %/degC - **Temperature coefficient of Voc:** -0.280 %/degC - **Temperature coefficient of Isc:** 0.050 %/degC - **NOCT:** 43 degC ### Cell and construction - **Cell type:** Monocrystalline - **Cell technology:** PERC - **Cell count:** 132 ### Physical - **Length:** 1925 mm - **Width:** 1040 mm - **Thickness:** 35 mm - **Weight:** 23.0 kg - **Area:** 2.00 m2 - **Power density:** 199.8 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:** 328 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 12377 of 14129 | | Power density | 12332 of 14129 | | Temperature coefficient | 10489 of 14129 | | Weight | 11333 of 14129 | | Warranty | 9912 of 14129 | ## Pros - **Tier-1 manufacturer per BNEF** - Phono Solar has operated since 2004 and has repeatedly been confirmed on Bloomberg New Energy Finance's Tier 1 list for its 'bankability strength', which supports project financing by banks and institutional investors. - **Half-cut cells with MBB technology** - Half-cutting combined with multi-busbar reduces resistive losses and improves mechanical durability, lowering susceptibility to micro-cracks under heavy snow and wind loads. - **25-year power warranty with 84.8% retention** - The manufacturer guarantees a linear power decline to no less than 84.8% after 25 years, a standard industry benchmark for PERC modules from this era, ensuring predictable yields over a long investment horizon. - **Low temperature coefficient of -0.33%/°C** - The -0.33%/°C value limits power loss at high operating temperatures, an important advantage for installations in high-irradiance climates where panel temperature exceeds 25°C for most of the year. - **Optimized performance under partial shading** - The half-cut architecture splits the module into independent sections, limiting output loss under partial shading and improving real-world yield for installations with atypical exposure, e.g. near chimneys or trees. ## Cons - **Production discontinued in 2022** - The TwinPlus series launched in 2019 and was discontinued in 2022, meaning limited availability of identical replacement modules for repairs or system expansion, plus potential challenges with warranty servicing over the long term. - **Efficiency below comparable models** - Efficiency of 19.98-20.98% trails direct segment competitors: GCL-M10/54H (21.5%), RedSolar P series (21.52%) and Jinko JS-PERC (21.7%), meaning lower installed power for the same roof area. - **12-year product warranty below current standard** - The 12-year product warranty is shorter than the 15-25 years now offered by many tier-1 manufacturers for materials and workmanship, which may affect the perceived residual value of the system for resale or bank financing. ## About this series Phono Solar TwinPlus photovoltaic panels are based on an innovative **half-cut cell** structure, which allows for a drastic reduction in power losses resulting from internal resistance and better heat management. The use of **multi-busbar (MBB) technology** makes the modules more resistant to mechanical stress and micro-cracks, which guarantees their longevity in difficult weather conditions. What distinguishes this series from the competition is, above all, **optimized operation in shaded conditions**, thanks to which the installation produces energy more efficiently even with unfavorable exposure. Investors appreciate these modules for their excellent price-to-quality ratio and high **resistance to PID and LID degradation**, which ensures yield stability over several decades of operation. The TwinPlus series is dedicated to both demanding home users and professional solar farms, offering a solid construction capable of withstanding extreme snow and wind loads. By choosing this solution, the user receives a product with a low temperature coefficient, which is key to maintaining high efficiency on the hottest days of the year, eliminating the typical power drop problems of traditional modules. ## Notable figures - At 20.0% efficiency, this panel is 0.6pp below the \*\*PERC 400-450W\*\* median of 20.6% - Power density of 199.8 W/m² is 6.4 W/m² below \*\*PERC 400-450W\*\* median (206.2 W/m²) - needs more roof space - Temperature coefficient of -0.35%/°C matches the \*\*PERC 400-450W\*\* median - At 23.0 kg, weight matches the \*\*PERC 400-450W\*\* median - #12377 for efficiency, #10489 for temperature performance out of 14129 panels ## Questions ### Is the Phono Solar TwinPlus series still available for purchase? The TwinPlus series has been discontinued and is no longer part of the regular product lineup at major distributors. Remaining stock may still be found at select resellers. If you need a current equivalent, it is worth asking your supplier about newer Phono Solar series or comparing offers from other Tier 1 manufacturers with similar PERC module specifications. ### What warranties come with Phono Solar TwinPlus panels? Phono Solar offered a 12-year product warranty covering manufacturing defects and mechanical failures, plus a 25-year linear power warranty. The power warranty guarantees the module retains at least 80-83% of its rated output after 25 years of operation. This is the standard Tier 1 benchmark, ensuring predictable energy yields over the full operational lifetime of the installation. ### What are the practical benefits of half-cut cells and multi-busbar (MBB) technology in the TwinPlus? Half-cut PERC cells reduce internal resistance and heat loss, which lowers power losses under partial shading on a 420 Wp module. The multi-busbar (MBB) design distributes mechanical stress across more busbars, reducing the risk of microcracks. The result is greater durability, improved resistance to LID and PID degradation, and more stable output under variable weather conditions. ### How do Phono Solar TwinPlus 420 Wp panels perform in high summer temperatures? The TwinPlus series features a low temperature coefficient (typically around -0.35%/°C for Pmax), meaning relatively small power losses during heat waves. Compared to older polycrystalline modules, they lose less efficiency as cell temperature rises above 25°C. This matters especially in rooftop installations where module temperature can exceed 60-70°C on sunny days. ### Do TwinPlus panels handle partial shading well, for example from a chimney or dormer? Yes, the TwinPlus series is specifically optimized for shaded conditions. The half-cut cell layout means that shading the upper or lower half of the module does not shut down the entire cell string as it would in a conventional module. In practice this translates to higher energy yield on roofs with obstructions. For installations with complex, multi-source shading, adding power optimizers or microinverters will further improve MPPT performance. ### Are Phono Solar TwinPlus modules suitable for a utility-scale solar farm, or only for residential use? The TwinPlus series was designed for both residential prosumer installations and commercial solar farms. The aluminum frame meets IEC load ratings for extreme snow and wind, and modules up to 420 Wp string well in larger arrays. For current utility-scale projects, however, newer high-power modules (500+ Wp) typically offer lower balance-of-system (BoS) costs per peak kilowatt and may be a better fit. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/GL-EN-TwinPlus-166-132-9BB-8459ff8b45b8.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [Luxor Solar LX-440M/182-108+GG](https://comparepv.com/panel/luxor-solar-lx-440m-182-108-gg) | 440 W | Cooler, +3.1 pp, +5 yr warranty | | [Just Solar JST-EDMH-(445-465)W-TD (450W class)](https://comparepv.com/panel/just-solar-jst-edmh-445-465-w-td-450w-class) | 450 W | +50 W, +3.1 pp, +5 yr warranty | | [Q-SUN Solar QNN182-HG450-54](https://comparepv.com/panel/qn-solar-pv-limited-qnn182-hg450-54) | 450 W | +50 W, cooler, +3.1 pp | | [Huayao HY440-N108BDD](https://comparepv.com/panel/huayao-hy440-n108bdd) | 450 W | +50 W, +3.1 pp, +5 yr warranty | | [BYD NLBK-27-450](https://comparepv.com/panel/byd-nlbk-27-450) | 450 W | +50 W, +3.1 pp, +5 yr warranty | | [Renesola RS41-450NBG-E3](https://comparepv.com/panel/renesola-rs41-450nbg-e3) | 450 W | +50 W, cooler, +3.1 pp | | [Phono Solar PS405M4-22/WH](https://comparepv.com/panel/phono-solar-ps405m4-22-wh) | 405 W | +0.2 pp | | [Phono Solar PS410M4-22/WH](https://comparepv.com/panel/phono-solar-ps410m4-22-wh) | 410 W | +10 W, +0.5 pp | | [Phono Solar PS415M4-22/WH](https://comparepv.com/panel/phono-solar-ps415m4-22-wh) | 415 W | +15 W, +0.8 pp | | [Phono Solar PS420M4-22/WH](https://comparepv.com/panel/phono-solar-ps420m4-22-wh) | 420 W | +20 W, +1.0 pp | | [Longi Solar LR7-60HVH-560M](https://comparepv.com/panel/longi-lr7-60hvh-560m) | 560 W | +160 W, cooler, +4.8 pp | | [Longi Solar LR7-60HVH-555M](https://comparepv.com/panel/longi-lr7-60hvh-555m) | 555 W | +155 W, cooler, +4.6 pp | | [Longi Solar LR7-60HVHL-550M](https://comparepv.com/panel/longi-lr7-60hvhl-550m) | 550 W | +150 W, cooler, +4.4 pp | | [JA Solar JAT60S40-540/LR](https://comparepv.com/panel/ja-solar-jat60s40-540-lr) | 540 W | +140 W, cooler, +4.4 pp | | [Gokin GK-5-60HG-540M](https://comparepv.com/panel/gokin-gk-5-60hg-540m) | 540 W | +140 W, cooler, +4.4 pp | | [Jinko Solar JKM545-54QL6-DV-F1-EU](https://comparepv.com/panel/jinko-solar-jkm545-54ql6-dv-f1-eu) | 545 W | +145 W, cooler, +4.3 pp | --- Source: https://comparepv.com/panel/phono-solar-ps400m4-22-wh Not in this file, on the page: a thirty-year output simulator and alternatives filtered by how closely they match these dimensions.