--- title: "Mission Solar MSI10-555HT4T 555W Solar Panel - Specs & Review | ComparePV" description: "Mission Solar MSI10-555HT4T 555W solar panel. Specs: 21.69% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/mission-solar-msi10-555ht4t" updated: 2026-09-11 --- # Mission Solar MSI10-555HT4T Efficiency leader, short guarantee 589 panels in the segment PERC 550-600 W ## Identity - **Manufacturer:** Mission Solar - **Model:** MSI10-555HT4T - **Series:** PERC Bifacial 144HC Transparent Backsheet - **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 | 21.69% | 21.29% | Strong - top 8% | 7,530 | | Power density | 214.8 | 212.9 | Strong - top 20% | 8,034 | | Temperature coefficient | -0.336 | -0.350 | Strong - top 12% | 8,775 | | Weight (kg) | 28.2 kg | 30.8 kg | Typical | | | Performance warranty | 25 yrs | 27 yrs | Weak - bottom 24% | 9,798 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 21.69% | 21.29% | Strong - top 8% | 7,530 | | Power density | 214.8 | 212.9 | Strong - top 20% | 8,034 | | Temperature coefficient | -0.336 | -0.350 | Strong - top 12% | 8,775 | | Weight per kWp | 50.8 | 52.7 | Typical | 4,217 | | Performance warranty | 25 yrs | 27 yrs | Weak - bottom 24% | 9,798 | ### Strengths - **21.69% module efficiency** - Top 8% of the PERC 550-600 W segment, against a median of 21.29%. Ranked 7,530th in the whole database. - **-0.336 %/°C temperature coefficient** - Top 12% of the PERC 550-600 W segment, against a median of -0.350. - **214.8 watts per square metre** - Top 20% of the PERC 550-600 W segment, against a median of 212.9. ### Watch out for - **25 year performance warranty** - Bottom 24% of the PERC 550-600 W segment, against a median of 27 yrs. - **Best for:** Commercial, utility-scale and shaded-installations. - **Not ideal for:** Owners who want a long output guarantee. ## Specification ### Electrical - **Rated power (Pmax):** 555 W - **Efficiency:** 21.69 % - **Voltage at Pmax (Vmp):** 42.09 V - **Current at Pmax (Imp):** 13.19 A - **Open-circuit voltage (Voc):** 49.95 V - **Short-circuit current (Isc):** 14.02 A - **Max system voltage:** 1500 V ### Temperature - **Temperature coefficient of Pmax:** -0.336 %/degC - **Temperature coefficient of Voc:** -0.285 %/degC - **Temperature coefficient of Isc:** 0.040 %/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:** 35 mm - **Weight:** 28.2 kg - **Area:** 2.58 m2 - **Power density:** 214.8 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:** 455 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 7530 of 14005 | | Power density | 8034 of 14005 | | Temperature coefficient | 8775 of 14005 | | Weight | 4217 of 14005 | | Warranty | 9798 of 14005 | ## Pros - **US-made, San Antonio TX** - Modules are designed and assembled at Mission Solar's San Antonio, Texas facility, qualifying them for the IRA domestic content bonus - an additional 10 percentage points on ITC/PTC for US commercial and utility projects, where the domestic content threshold is 45% in 2025 and rises to 50% in 2026. - **Highest efficiency among peer set** - Efficiency up to 21.69% exceeds comparable series: ET Solar Elite PLUS (21.4%), JA Solar DEEP BLUE 3.0 (21.5%), and Boviet Solar VEGA (21.3%) at the same 555 Wp max power. - **Bifacial design with transparent backsheet** - The bifacial construction with a transparent backsheet captures light reflected off the ground, boosting real-world yield on bright roofs, roofing membranes, and ground-mount installations with favorable albedo. - **Half-cut PERC cells reduce losses** - The half-cut layout (144 half-cells) reduces resistive losses and improves partial-shading tolerance, relevant for complex roof geometries or shadows cast by parapets and chimneys. - **High mechanical load rating** - Per the datasheet, the module withstands a design load of 3600 Pa front and 1600 Pa rear with a 1.5 safety factor, easing deployment in demanding wind and snow-load zones. ## Cons - **No Tier-1 (BNEF) status** - Mission Solar is not on the Bloomberg NEF Tier-1 list due to its manufacturing scale, which can complicate bank financing for large commercial and utility-scale projects - the very segment this series is marketed toward. - **PERC rather than N-type/TOPCon** - The series relies on older PERC cell technology, while Mission Solar itself has already launched an N-type 108HC line (MSX10), and the commercial module market in 2024-2026 is increasingly shifting to TOPCon for lower LID/LeTID degradation and better high-temperature performance. - **Standard 25-year power warranty** - The 25-year linear power warranty (12-year product warranty) matches market standard but falls short of the extended 30-year warranties increasingly offered by N-type module manufacturers in the premium segment. ## About this series The Mission Solar PERC Bifacial 144HC Transparent Backsheet series is designed for installations where maximizing real energy yield is crucial, even under less-than-ideal conditions. The use of a **bifacial design with a transparent backsheet** allows for the utilization of reflected light from the ground, making the modules more efficient on bright roofs, membranes, and PV farms with well-matched surfaces. The **PERC cell technology in a half-cut configuration** also helps minimize losses and improves performance under partial shading - which is important in complex roof geometries or in close proximity to eaves. The modules are also designed for demanding environments: **high resistance to loads and harsh weather conditions** makes it easier to plan installations in wind and snow zones. This solution is particularly suitable for **commercial and utility projects**, where the advantages lie in the stability of parameters, predictable production, and long-term durability, rather than just the declared power. ## Notable figures - At 21.7% efficiency, this panel is on par with typical \*\*PERC 550-600W\*\* modules - At 214.8 W/m² power density, roof space requirements are typical for \*\*PERC 550-600W\*\* panels - At -0.34%/°C, hot weather performance is typical for \*\*PERC 550-600W\*\* panels - At 28.2 kg, this panel is 2.6 kg lighter than \*\*PERC 550-600W\*\* median (30.8 kg) - easier handling during installation - Ranked #7530 out of 14005 panels for efficiency in the database ## Questions ### What is the warranty on the Mission Solar PERC Bifacial 144HC Transparent Backsheet series? The Mission Solar PERC Bifacial 144HC Transparent Backsheet series comes with a 12-year product warranty and a 25-year linear power output warranty. The long-term power guarantee is especially relevant for commercial and utility projects where predictable energy yield over the full financing period is critical to ROI calculations. ### Do Mission Solar PERC Bifacial 144HC modules with transparent backsheet actually generate more energy than standard panels? Yes, provided the installation surface is suitable. The transparent backsheet, replacing an opaque rear film, allows the PERC cells to collect light reflected from below. On light-colored membranes, white rooftops, or ground-mount PV farms with bright surfaces, the bifacial design can add several to over ten percent in energy yield compared to a monofacial module with the same rated power. ### Are Mission Solar PERC Bifacial 144HC panels a good fit for rooftops with parapets or chimneys? Yes, largely because of the 144-cell half-cut layout. Split cells limit current mismatch losses under partial shading, so a parapet or chimney shadow affects a smaller portion of the module at any given time. This does not eliminate shading losses entirely, but it improves performance compared to full-cell 72-cell modules under the same conditions. ### Can Mission Solar PERC Bifacial 144HC panels handle harsh winters and strong winds? The series is engineered for demanding environmental conditions and passes IEC mechanical load tests, making it suitable for high-wind and heavy-snow zones. Before specifying the module, verify the maximum static and dynamic load ratings in the datasheet against the local wind and snow zone requirements for your installation site. ### What types of projects are Mission Solar PERC Bifacial 144HC Transparent Backsheet modules best suited for? This series targets commercial and utility-scale applications where long-term output stability and predictability matter most. With up to 555 Wp rated power, bifacial gain potential, and robust mechanical design, it fits well in ground-mount PV farms with suitable albedo surfaces and large industrial rooftops with light-colored EPDM or TPO membranes. ### Is Mission Solar a Tier 1 manufacturer, and does it matter when buying these panels? Mission Solar is not currently listed as a Tier 1 manufacturer in Bloomberg NEF rankings. For large utility projects, some lenders may require additional due diligence or apply stricter financing terms. For smaller commercial installations the distinction is often less critical, but it is worth factoring in during financing negotiations or when evaluating insurance conditions for the system. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/c-mktg-0037-datasheet-for-ht4t-msi-module-1-156370528e85.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [Longi Solar LR7-54HJD-510M](https://comparepv.com/panel/longi-lr7-54hjd-510m) | 510 W | Cooler, +3.3 pp, +5 yr warranty | | [Longi Solar LR7-60HVH-560M](https://comparepv.com/panel/longi-lr7-60hvh-560m) | 560 W | Cooler, +3.1 pp, +5 yr warranty | | [Longi Solar LR7-54HJD-505M](https://comparepv.com/panel/longi-lr7-54hjd-505m) | 505 W | -50 W, cooler, +3.0 pp | | [Longi Solar LR7-60HVH-555M](https://comparepv.com/panel/longi-lr7-60hvh-555m) | 555 W | Cooler, +2.9 pp, +5 yr warranty | | [Longi Solar LR7-60HVHL-550M](https://comparepv.com/panel/longi-lr7-60hvhl-550m) | 550 W | Cooler, lighter, +2.7 pp | | [JA Solar JAT60S40-540/LR](https://comparepv.com/panel/ja-solar-jat60s40-540-lr) | 540 W | Cooler, +2.7 pp, +5 yr warranty | | [Mission Solar MSI10-545HT4T](https://comparepv.com/panel/mission-solar-msi10-545ht4t) | 545 W | -10 W, -0.4 pp | | [Mission Solar MSI10-550HT4T](https://comparepv.com/panel/mission-solar-msi10-550ht4t) | 550 W | Very close match | | [Mission Solar MSN10-575HN4G](https://comparepv.com/panel/mission-solar-msn10-575hn4g) | 575 W | Heavier, +0.6 pp, +5 yr warranty | | [Mission Solar MSI10-580HN4G](https://comparepv.com/panel/mission-solar-msi10-580hn4g) | 580 W | Heavier, +0.8 pp, +5 yr warranty | | [Mission Solar MSI10-585HN4G](https://comparepv.com/panel/mission-solar-msi10-585hn4g) | 585 W | Heavier, +1.0 pp, +5 yr warranty | | [Mission Solar MSI10-590HN4G](https://comparepv.com/panel/mission-solar-msi10-590hn4g) | 590 W | Heavier, +1.2 pp, +5 yr warranty | | [AIKO AIKO-A650-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a650-mae72mw) | 650 W | +95 W, cooler, +3.5 pp | | [AIKO AIKO-A645-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a645-mae72mw) | 645 W | +90 W, cooler, +3.3 pp | | [AIKO AIKO-A640-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a640-mae72mw) | 640 W | +85 W, cooler, +3.1 pp | | [AIKO AIKO-A635-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a635-mae72mw) | 635 W | +80 W, cooler, +2.9 pp | --- Source: https://comparepv.com/panel/mission-solar-msi10-555ht4t Not in this file, on the page: a thirty-year output simulator and alternatives filtered by how closely they match these dimensions.