--- title: "Phono Solar PS550M6-24/TH Solar Panel: Specs & Datasheet | ComparePV" description: "Phono Solar PS550M6-24/TH solar panel. Specs: 21.29% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/phono-solar-technology-co-ltd-ps550m6-24-th" image: "https://comparepv.com/og/panel/phono-solar-technology-co-ltd-ps550m6-24-th.png" updated: 2026-09-11 --- # Phono Solar PS550M6-24/TH Strong in heat, short guarantee 589 panels in the segment PERC 550-600 W ## Identity - **Manufacturer:** Phono Solar - **Model:** PS550M6-24/TH - **Series:** Twinplus Module Series (High Efficiency Mono-PERC M6-10B-R) - **Rated power:** 550 W - **Cell technology:** PERC ## How it compares Compared against segment PERC 550-600 W (589 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 550 W | 560 W | Weak - bottom 15% | | | Module efficiency | 21.29% | 21.29% | Typical | 8,776 | | Power density | 212.9 | 212.9 | Typical | 8,563 | | Temperature coefficient | -0.330 | -0.350 | Strong - top 7% | 8,613 | | Weight (kg) | 28.0 kg | 30.8 kg | Typical | | | Performance warranty | 25 yrs | 27 yrs | Weak - bottom 24% | 9,912 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 21.29% | 21.29% | Typical | 8,776 | | Power density | 212.9 | 212.9 | Typical | 8,563 | | Temperature coefficient | -0.330 | -0.350 | Strong - top 7% | 8,613 | | Weight per kWp | 50.9 | 52.7 | Typical | 4,290 | | Performance warranty | 25 yrs | 27 yrs | Weak - bottom 24% | 9,912 | ### 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. ### Watch out for - **25 year performance warranty** - Bottom 24% of the PERC 550-600 W segment, against a median of 27 yrs. - **Best for:** Residential, commercial, shaded-installations and hot-climate. - **Not ideal for:** Owners who want a long output guarantee. ## Specification ### Electrical - **Rated power (Pmax):** 550 W - **Efficiency:** 21.29 % - **Voltage at Pmax (Vmp):** 41.55 V - **Current at Pmax (Imp):** 13.24 A - **Open-circuit voltage (Voc):** 49.59 V - **Short-circuit current (Isc):** 13.82 A ### 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 ### Physical - **Length:** 2278 mm - **Width:** 1134 mm - **Thickness:** 35 mm - **Weight:** 28.0 kg - **Area:** 2.58 m2 - **Power density:** 212.9 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:** 451 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 8776 of 14129 | | Power density | 8563 of 14129 | | Temperature coefficient | 8613 of 14129 | | Weight | 4290 of 14129 | | Warranty | 9912 of 14129 | ## Pros - **9 consecutive years on BNEF Tier 1** - Phono Solar (founded 2004) has held BloombergNEF Tier 1 status for 9 consecutive years, including the 2024 listing, confirming strong bankability and supplier reliability for non-recourse project financing. - **Efficiency in line with segment leaders** - The 20.71-21.48% efficiency range is fully competitive with top Mono-PERC 535-555W peers: JA Solar DEEP BLUE 3.0 (21.5%), ET Solar Elite PLUS (21.4%), and Boviet Solar VEGA (21.3%), with no meaningful technology gap. - **Half-cut and multi-busbar reduce losses** - Half-cut cell architecture combined with multi-busbar technology lowers resistive losses and improves tolerance to partial shading and uneven irradiance, resulting in more stable annual energy yield. - **High power density up to 555 Wp** - The maximum 555 Wp output matches the best peer comparables in the segment, making the series attractive for roof-constrained residential and commercial installations. - **All-black aesthetic finish** - The full-black design (frame and cell background) meets residential buyers' expectations, where rooftop appearance carries weight comparable to electrical performance. ## Cons - **Production discontinued in 2024** - The Twinplus M6-10B-R series was phased out after 4 years on the market (2020-2024), meaning limited module availability for future system expansions and potentially longer lead times on warranty claims as the product line winds down. - **Product warranty below current market standard** - The 12-year product / 25-year power warranty reflects the 2020-2022 PERC generation, while current tier-1 offerings - including newer N-type/TOPCon series - increasingly provide 15-25 year product warranties and 30-year power warranties. ## About this series The Phono Solar Twinplus Module Series (High Efficiency Mono-PERC M6-10B-R) was designed with the goal of maximizing yield from every square meter of roof space, without complicating the installation project. It employs monocrystalline cells **Mono-PERC** and half-cell architectures, genuinely improving module performance under everyday conditions-particularly with partial shading, dirt accumulation, and uneven sunlight exposure. The use of **multi-busbar** technology minimizes resistive losses and helps maintain stable operation, translating to a more predictable annual yield. In practice, this is a series for investors seeking high efficiency without compromising on reliability. The modules are designed for residential and commercial rooftops, where **high power density** and good performance in hot conditions are key. An additional distinguishing feature is the **all-black aesthetics**-important where the installation needs to look as good as it works. Compared to many competitive lines, the Twinplus M6-10B-R prioritizes higher resilience to operational conditions and better tolerance to shading, rather than just paper claims. ## Notable figures - Efficiency of 21.3% matches the \*\*PERC 550-600W\*\* median - At 212.9 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 - 28.0 kg weight - 2.8 kg lighter than \*\*PERC 550-600W\*\* median (30.8 kg), reducing installation effort - In the top 62% for efficiency among all PERC panels ## Questions ### Is the Phono Solar Twinplus M6-10B-R series still available for purchase? The Twinplus Module High Efficiency Mono-PERC M6-10B-R series has been discontinued and is no longer actively offered by the manufacturer. Limited stock may still exist with some distributors, but it should not be relied upon when planning a new installation. For comparable performance, consider current Phono Solar models or another Tier 1 module with similar power output and PERC or TOPCon technology. ### What warranty does Phono Solar offer on the Twinplus M6-10B-R modules? The manufacturer provided a 12-year product warranty covering material and workmanship defects, and a 25-year linear power warranty. This means the module should retain at least 80-83% of its nominal power output after 25 years of operation. Since the series is discontinued, handling of any warranty claims depends on Phono Solar's current procedures and the local distributor's policies. ### What are the practical benefits of half-cut cell and multi-busbar technology in the Twinplus M6-10B-R? Half-cut cell technology splits each cell in two, reducing the current flowing through it and lowering resistive losses. Multi-busbar design further shortens the electron path to the contact points. In real-world conditions, this translates to better performance under partial shading, reduced heat buildup at cell interconnects, and more consistent annual energy yield compared to modules built on older cell architectures. ### Are the all-black Twinplus M6-10B-R panels suitable for a pitched residential roof? Yes, this series was designed with residential rooftop prosumer installations in mind. The all-black finish, featuring black frames and a black cell backsheet, provides an aesthetically clean look on tile or metal roofs. With up to 555 Wp per module, the high power density allows maximizing output on a limited roof area, which is especially important on smaller or partially shaded roof sections. ### How do the Twinplus M6-10B-R modules perform on hot days when rooftop temperature exceeds 50°C? All silicon cells lose output as temperature rises. The PERC technology used in this series offers a slightly better temperature coefficient than standard BSF cells. The manufacturer rated the nominal operating cell temperature (NOCT) at approximately 45°C, which limits thermal losses under high irradiance. With adequate airflow beneath the module, annual energy yield is more predictable than with older cell technologies. ### What is the peak power of the Phono Solar Twinplus M6-10B-R panel, and how many modules are needed for a 10 kWp system? The peak power of this series reaches 555 Wp under STC conditions. To build a 10 kWp system you would need approximately 18 modules (18 × 555 Wp = 9.99 kWp). Since the series is discontinued, sourcing that many identical units is difficult. For any new installation, choosing a currently manufactured series is strongly recommended to avoid issues with module matching or future replenishment. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/gl-en-twinplus-182-144-10bb-fb47d1f4ba48.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [Longi Solar LR7-54HJD-510M](https://comparepv.com/panel/longi-lr7-54hjd-510m) | 510 W | Cooler, +3.7 pp, +5 yr warranty | | [Longi Solar LR7-60HVH-560M](https://comparepv.com/panel/longi-lr7-60hvh-560m) | 560 W | Cooler, +3.5 pp, +5 yr warranty | | [Longi Solar LR7-54HJD-505M](https://comparepv.com/panel/longi-lr7-54hjd-505m) | 505 W | Cooler, +3.4 pp, +5 yr warranty | | [WINAICO WST-505BKX54-A2](https://comparepv.com/panel/winaico-wst-505bkx54-a2) | 505 W | Cooler, +3.4 pp, +5 yr warranty | | [Longi Solar LR7-60HVH-555M](https://comparepv.com/panel/longi-lr7-60hvh-555m) | 555 W | Cooler, +3.3 pp, +5 yr warranty | | [Longi Solar LR7-54HJD-500M](https://comparepv.com/panel/longi-lr7-54hjd-500m) | 500 W | -50 W, cooler, +3.2 pp | | [Phono Solar PS535M8GF-24/TH](https://comparepv.com/panel/phono-solar-ps535m8gf-24-th) | 535 W | Heavier, -0.6 pp, +5 yr warranty | | [Phono Solar PS540M8-24/TH](https://comparepv.com/panel/phono-solar-phono-solar-technology-co-ltd-ps540m8-24-th) | 540 W | -10 W, hotter, -0.4 pp | | [Phono Solar PS545M8-24/TH](https://comparepv.com/panel/phono-solar-phono-solar-technology-co-ltd-ps545m8-24-th) | 545 W | Hotter | | [AIKO AIKO-A650-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a650-mae72mw) | 650 W | +100 W, cooler, +3.9 pp | | [AIKO AIKO-A645-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a645-mae72mw) | 645 W | +95 W, cooler, +3.7 pp | | [AIKO AIKO-A640-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a640-mae72mw) | 640 W | +90 W, cooler, +3.5 pp | | [AIKO AIKO-A635-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a635-mae72mw) | 635 W | +85 W, cooler, +3.3 pp | | [AIKO AIKO-A630-MAH72Dw](https://comparepv.com/panel/aiko-aiko-a630-mah72dw) | 630 W | +80 W, cooler, +3.1 pp | --- Source: https://comparepv.com/panel/phono-solar-technology-co-ltd-ps550m6-24-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 and alternatives filtered by how closely they match these dimensions.