--- title: "Phono Solar PS555M8GF-24/TH Solar Panel: Specs & Datasheet | ComparePV" description: "Phono Solar PS555M8GF-24/TH solar panel. Specs: 21.48% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/phono-solar-ps555m8gf-24-th" image: "https://comparepv.com/og/panel/phono-solar-ps555m8gf-24-th.png" updated: 2026-09-11 --- # Phono Solar PS555M8GF-24/TH Strong in heat, no clear weak spot 589 panels in the segment PERC 550-600 W ## Identity - **Manufacturer:** Phono Solar - **Model:** PS555M8GF-24/TH - **Series:** Bifacial Twinplus Module Series (HIGH EFFICIENCY MONO-PERC BM6-10B-G) - **Rated power:** 555 W - **Cell technology:** PERC - **Bifacial:** yes ## How it compares Compared against segment PERC 550-600 W (589 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 555 W | 560 W | Typical | | | Module efficiency | 21.48% | 21.29% | Typical | 8,217 | | Power density | 214.8 | 212.9 | Strong - top 20% | 8,099 | | Temperature coefficient | -0.330 | -0.350 | Strong - top 7% | 8,613 | | Weight (kg) | 32.0 kg | 30.8 kg | Typical | | | Performance warranty | 30 yrs | 27 yrs | Strong - top 25% | 21 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 21.48% | 21.29% | Typical | 8,217 | | Power density | 214.8 | 212.9 | Strong - top 20% | 8,099 | | Temperature coefficient | -0.330 | -0.350 | Strong - top 7% | 8,613 | | Weight per kWp | 57.7 | 52.7 | Typical | 11,426 | | Performance warranty | 30 yrs | 27 yrs | Strong - top 25% | 21 | ### Strengths - **-0.330 %/°C temperature coefficient** - Top 7% of the PERC 550-600 W segment, against a median of -0.350. Ranked 8,613th in the whole database. - **214.8 watts per square metre** - Top 20% of the PERC 550-600 W segment, against a median of 212.9. - **30 year performance warranty** - Top 25% of the PERC 550-600 W segment, against a median of 27 yrs. - **Best for:** Commercial, utility-scale and shaded-installations. ## Specification ### Electrical - **Rated power (Pmax):** 555 W - **Efficiency:** 21.48 % - **Voltage at Pmax (Vmp):** 41.67 V - **Current at Pmax (Imp):** 13.32 A - **Open-circuit voltage (Voc):** 49.89 V - **Short-circuit current (Isc):** 14.03 A - **Max system voltage:** 1500 V ### Temperature - **Temperature coefficient of Pmax:** -0.330 %/degC - **Temperature coefficient of Voc:** -0.260 %/degC - **Temperature coefficient of Isc:** 0.042 %/degC - **NOCT:** 45 degC ### Cell and construction - **Cell type:** Monocrystalline - **Cell technology:** PERC - **Cell count:** 144 - **Bifacial:** yes ### Physical - **Length:** 2278 mm - **Width:** 1134 mm - **Thickness:** 30 mm - **Weight:** 32.0 kg - **Area:** 2.58 m2 - **Power density:** 214.8 Wp/m2 ### Warranty and degradation - **Product warranty:** 12 years - **Performance warranty:** 30 years - **Output guaranteed at end of warranty:** 85.0 % - **First-year degradation:** 2.00 % - **Annual degradation:** 0.45 % - **Output after 30 years:** 471 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 8217 of 14129 | | Power density | 8099 of 14129 | | Temperature coefficient | 8613 of 14129 | | Weight | 11426 of 14129 | | Warranty | 21 of 14129 | ## Pros - **Bifacial design boosts energy yield** - The dual-sided module design captures reflected ground light (albedo), delivering additional energy production versus comparable monofacial modules in ground-mount, carport, and utility-scale PV installations. - **Half-cut + multi-busbar reduce losses** - Combining half-cut cells with multi-busbar technology lowers resistive losses and improves module behavior under partial shading, which matters for commercial installations with irregular shadow patterns. - **Double glass and POE encapsulation** - The double-glass construction with POE encapsulation (instead of standard EVA) increases resistance to potential-induced degradation (PID) and improves module sealing in humid or demanding operating environments. - **Tier-1 manufacturer, 9 years on BNEF list** - Phono Solar has been included on the BloombergNEF Tier 1 list for the ninth consecutive year (confirmed in Q2 2024), reflecting stable project bankability and a proven track record of large-scale PV deliveries. - **Competitive efficiency versus segment peers** - Maximum efficiency of 21.48% at up to 555 Wp places this series directly alongside comparable tier-1 products (ET Solar Elite PLUS 21.4%, Boviet VEGA 21.3%, JA Solar DEEP BLUE 3.0 21.5%), with no meaningful gap from the top of the PERC segment. ## Cons - **Production discontinued in 2024** - The series has been discontinued (released 2020, ended 2024), meaning limited availability of matching replacement modules for expanding existing installations and potentially slower response times for warranty servicing. - **Product warranty below current market standard** - The 12-year product warranty is shorter than the 15 years now offered by many Tier-1 manufacturers on newer TOPCon series, positioning this mono-PERC series' warranty terms as dated relative to the 2026 market baseline. ## About this series The Phono Solar Bifacial Twinplus Module (HIGH EFFICIENCY MONO-PERC BM6-10B-G) is designed for installations where real energy yield matters across various conditions-beyond just ideal exposure. The use of **bifacial construction** actively utilizes reflected light from the ground, translating into higher production where conventional modules reach their limits. Simultaneously, **mono-PERC technology** supports stable performance across a wide range of irradiance levels, and the combination of **half-cut** with **multi-busbar** helps minimize cell connection losses and improves module performance under partial shading. In practice, this series addresses common investor challenges: yield losses in hot weather, sensitivity to partial shading, and the risk of accelerated degradation. Its reinforced structure with **dual-glass and POE encapsulation** enhances PID resistance and increases reliability in harsh environments. This is an excellent choice for utility-scale PV farms, ground-mounted systems, carports, and commercial installations, where predictable production and a better LCOE compared to standard monofacial modules are key priorities. ## Notable figures - Efficiency of 21.5% matches the \*\*PERC 550-600W\*\* median - At 214.8 W/m² power density, roof space requirements are typical for \*\*PERC 550-600W\*\* panels - At -0.33%/°C, hot weather performance is typical for \*\*PERC 550-600W\*\* panels - At 32.0 kg, this panel is 1.2 kg heavier than the \*\*PERC 550-600W\*\* median (30.8 kg) - more demanding for installation crews - Bifacial design (70% factor) captures reflected light - adds 4-10% yield on ground-mount or white roof ## Questions ### What is the maximum power output of the Phono Solar Bifacial Twinplus BM6-10B-G series and what affects real-world yield? Modules in the BM6-10B-G series reach up to 555 Wp peak power on the front side. Thanks to the bifacial design, the rear side also captures light reflected from the ground surface, which under favorable conditions (high-albedo ground, adequate clearance) can add several to over ten percent on top of the nameplate rating. Actual bifacial gain depends on ground albedo and mounting height. ### How do Phono Solar BM6-10B-G modules perform in high summer temperatures? The BM6-10B-G series uses mono-PERC cell technology with a relatively low power temperature coefficient of approximately -0.35%/°C. This means power losses on hot days are kept to a minimum compared to standard polycrystalline modules. The dual-glass construction also aids heat dissipation, supporting stable output under demanding climate conditions. ### Are Phono Solar Bifacial Twinplus BM6-10B-G panels resistant to partial shading? Yes. The BM6-10B-G series combines half-cut cell technology with a multi-busbar layout. Half-cut cells reduce cell-level resistance and limit current mismatch losses when part of the module is shaded - only the shaded half-strings are affected while the rest continues operating normally. The multi-busbar design further reduces thermal stress and interconnect losses, improving overall performance near chimneys, trees, or inter-row shading. ### What are the product and power output warranties for the Phono Solar BM6-10B-G series? Phono Solar provides a 12-year product warranty covering material and workmanship defects, plus a 30-year linear power output warranty with guaranteed minimum power levels over the entire 30-year period. To claim warranty service, retain the purchase invoice and installation documentation and contact an authorized Phono Solar distributor. ### What types of installations is the Phono Solar Bifacial Twinplus BM6-10B-G series best suited for? The BM6-10B-G series is designed primarily for utility-scale PV farms, ground-mounted systems, carports, and commercial or industrial rooftops. Bifacial modules require adequate ground clearance (typically 0.5-1 m) and a reflective surface to generate meaningful rear-side yield. The reinforced dual-glass construction with POE encapsulation performs well in demanding environments with elevated humidity or aggressive weather exposure. ### Is the Phono Solar Bifacial Twinplus BM6-10B-G series still available for purchase? The BM6-10B-G series has been discontinued by Phono Solar and is no longer in active production. Remaining stock may still be available through select distributors or on the secondary market, but availability is limited. For new projects, it is advisable to consider current Phono Solar series or equivalent Tier 1 bifacial mono-PERC modules from other manufacturers. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/gl-en-bifacial-twinplus-182-144-10bb-2c8cc9478afa.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [Longi Solar LR7-54HJD-510M](https://comparepv.com/panel/longi-lr7-54hjd-510m) | 510 W | Cooler, lighter, +3.5 pp | | [Longi Solar LR7-60HVH-560M](https://comparepv.com/panel/longi-lr7-60hvh-560m) | 560 W | Cooler, lighter, +3.3 pp | | [Longi Solar LR7-54HJD-505M](https://comparepv.com/panel/longi-lr7-54hjd-505m) | 505 W | Cooler, lighter, +3.2 pp | | [WINAICO WST-505BKX54-A2](https://comparepv.com/panel/winaico-wst-505bkx54-a2) | 505 W | Cooler, lighter, +3.2 pp | | [Longi Solar LR7-60HVH-555M](https://comparepv.com/panel/longi-lr7-60hvh-555m) | 555 W | Cooler, lighter, +3.1 pp | | [Longi Solar LR7-60HVHL-550M](https://comparepv.com/panel/longi-lr7-60hvhl-550m) | 550 W | Cooler, 16 kg lighter, +2.9 pp | | [Phono Solar PS535M8GF-24/TH](https://comparepv.com/panel/phono-solar-ps535m8gf-24-th) | 535 W | -20 W, -0.8 pp | | [Phono Solar PS540M8-24/TH](https://comparepv.com/panel/phono-solar-phono-solar-technology-co-ltd-ps540m8-24-th) | 540 W | Lighter, -0.6 pp, -5 yr warranty | | [Phono Solar PS545M8-24/TH](https://comparepv.com/panel/phono-solar-phono-solar-technology-co-ltd-ps545m8-24-th) | 545 W | Hotter, lighter, -5 yr warranty | | [AIKO AIKO-A650-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a650-mae72mw) | 650 W | +95 W, cooler, +3.7 pp | | [AIKO AIKO-A645-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a645-mae72mw) | 645 W | +90 W, cooler, +3.5 pp | | [AIKO AIKO-A640-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a640-mae72mw) | 640 W | +85 W, cooler, +3.3 pp | | [AIKO AIKO-A635-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a635-mae72mw) | 635 W | +80 W, cooler, +3.1 pp | | [AIKO AIKO-A630-MAH72Dw](https://comparepv.com/panel/aiko-aiko-a630-mah72dw) | 630 W | +75 W, cooler, +2.9 pp | --- Source: https://comparepv.com/panel/phono-solar-ps555m8gf-24-th 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.