--- title: "MY Solar MS620N-DHBGA Solar Panel: Specs & Datasheet | ComparePV" description: "MY Solar MS620N-DHBGA solar panel. Specs: 22.95% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/my-solar-ms620n-dhbga" image: "https://comparepv.com/og/panel/my-solar-ms620n-dhbga.png" updated: 2026-09-11 --- # MY Solar MS620N-DHBGA Middle of its segment, weak in heat 1,085 panels in the segment TOPCon 600-650 W ## Identity - **Manufacturer:** MY Solar - **Model:** MS620N-DHBGA - **Series:** G&A N-Type TOPCon Bifacial - **Rated power:** 620 W - **Cell technology:** TOPCon - **Bifacial:** yes ## How it compares Compared against segment TOPCon 600-650 W (1085 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 620 W | 620 W | Typical | | | Module efficiency | 22.95% | 22.80% | Typical | 2,320 | | Power density | 229.5 | 227.7 | Typical | 2,243 | | Temperature coefficient | -0.300 | -0.290 | Weak - bottom 19% | 6,152 | | Weight (kg) | 32.5 kg | 32.8 kg | Typical | | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 22.95% | 22.80% | Typical | 2,320 | | Power density | 229.5 | 227.7 | Typical | 2,243 | | Temperature coefficient | -0.300 | -0.290 | Weak - bottom 19% | 6,152 | | Weight per kWp | 52.4 | 53.1 | Typical | 5,938 | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Watch out for - **-0.300 %/°C temperature coefficient** - Bottom 19% of the TOPCon 600-650 W segment, against a median of -0.290. - **Best for:** Commercial and utility-scale. - **Not ideal for:** Hot climates. ## Specification ### Electrical - **Rated power (Pmax):** 620 W - **Efficiency:** 22.95 % - **Voltage at Pmax (Vmp):** 40.42 V - **Current at Pmax (Imp):** 15.30 A - **Open-circuit voltage (Voc):** 48.66 V - **Short-circuit current (Isc):** 16.06 A - **Max system voltage:** 1500 V ### Temperature - **Temperature coefficient of Pmax:** -0.300 %/degC - **Temperature coefficient of Voc:** -0.260 %/degC - **Temperature coefficient of Isc:** 0.046 %/degC - **NOCT:** 42 degC ### Cell and construction - **Cell type:** Monocrystalline - **Cell technology:** TOPCon - **Cell count:** 132 - **Bifacial:** yes - **Bifacial gain:** 25.50 ### Physical - **Length:** 2382 mm - **Width:** 1134 mm - **Thickness:** 30 mm - **Weight:** 32.5 kg - **Area:** 2.70 m2 - **Power density:** 229.5 Wp/m2 ### Warranty and degradation - **Product warranty:** 25 years - **Performance warranty:** 30 years - **Output guaranteed at end of warranty:** 88.8 % - **First-year degradation:** 1.00 % - **Annual degradation:** 0.35 % - **Output after 30 years:** 551 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 2320 of 14129 | | Power density | 2243 of 14129 | | Temperature coefficient | 6152 of 14129 | | Weight | 5938 of 14129 | | Warranty | 21 of 14129 | ## Pros - **N-Type TOPCon cells, low degradation** - N-Type TOPCon technology eliminates Light Induced Degradation (LID) typical of older PERC cells, resulting in a significantly slower power decline in the early years of operation and better performance under low-irradiance and diffuse-light conditions. - **Bifacial dual-side generation** - The bifacial design enables additional energy harvest from light reflected onto the rear side of the module, which is particularly beneficial in ground-mount installations on high-albedo surfaces (e.g., gravel, white roofing) and high-albedo commercial rooftops. - **30-year linear power warranty** - The 25-year product warranty combined with a 30-year linear power warranty is standard for top-tier N-Type modules and clearly exceeds older PERC terms (typically 25-year product / 25-year power warranty ending around 80.7%), translating into a longer period of predictable, guaranteed energy output. - **Favorable temperature coefficient** - TOPCon cells typically feature a lower power temperature coefficient (around -0.29%/°C versus roughly -0.35%/°C for PERC), reducing efficiency losses on hot days and supporting stable performance during Polish summer conditions. ## Cons - **Efficiency below peer group average** - The series' maximum efficiency is 22.95%, while comparable modules with the same maximum power of 620 Wp (HT-SAAE HT66-18X(ND)-F, Weran Solar LR7-72HTH, Astronergy ASTRO N7) reach 23%. The gap is modest but implies a slightly larger module area is needed to match equivalent output. - **Not on the BNEF Tier 1 bankable list** - MY Solar is not listed as a BNEF Tier 1 manufacturer, unlike many competing brands in this segment. This can complicate bank financing for large-scale projects and may affect insurance terms and resale valuation on the secondary market. ## About this series The MY Solar G&A N-Type TOPCon Bifacial series is an advanced solution for demanding investors who prioritize maximum efficiency and installation durability. The use of **N-Type TOPCon** cells ensures that these panels are characterized by near-zero light-induced degradation and outstanding efficiency even in low-light conditions. A key advantage is **bifacial energy generation**, which allows for a significant additional power yield from reflected light reaching the back of the module. This design effectively solves the problem of power loss over time, offering significantly slower material aging compared to traditional technologies. The series is ideal for professional ground-mounted installations and modern commercial roofs where maximizing return on investment is key. What sets them apart from the competition is primarily an **exceptional temperature coefficient**, which guarantees stable operation and lower energy losses during hot days. It is the choice for those seeking **high-resistance technology** against external factors, combining innovation with long-term reliability in Polish climatic conditions. By eliminating the LID phenomenon, these panels maintain the highest operating parameters through decades of use, making them a **cost-efficiency leader** in the premium segment. ## Notable figures - Efficiency of 22.9% matches the \*\*TOPCon 600-650W\*\* median - Power density of 229.5 W/m² matches the \*\*TOPCon 600-650W\*\* median - Temperature coefficient of -0.30%/°C matches the \*\*TOPCon 600-650W\*\* median - 85% bifaciality enables rear-side power generation, boosting yield by 4-13% on reflective surfaces - Ranked #2320 out of 14129 panels for efficiency in the database ## Questions ### What warranty does the MY Solar G&A N-Type TOPCon Bifacial series carry and what does it cover? The MY Solar G&A N-Type TOPCon Bifacial series comes with a 25-year product warranty covering defects in materials and workmanship, plus a 30-year linear power output warranty - one of the longest in the premium segment. The extended power guarantee is made possible by N-Type TOPCon cell technology, which degrades at only 0.4-0.5% per year, significantly slower than conventional PERC modules. ### How does bifacial energy generation work in the MY Solar G&A series and how much extra output can I expect? MY Solar G&A bifacial modules harvest reflected (albedo) light through their active rear surface in addition to the front side. In ground-mounted systems with light-colored gravel or soil, the rear side can contribute 10-25% additional yield on top of the 620 Wp nameplate rating. The rear-side bifacial factor reaches approximately 80-85% of front-side efficiency, making these modules especially cost-effective in open ground installations where reflected irradiance is available. ### Do MY Solar G&A TOPCon panels suffer greater power loss on hot days compared to standard modules? On the contrary - the G&A N-Type TOPCon series has a superior temperature coefficient of approximately -0.30%/°C, compared to around -0.40%/°C for PERC technology. At a typical summer module temperature of 65°C, TOPCon panels lose roughly 7.5% less power than an equivalent PERC module, resulting in measurably higher energy yield during peak summer hours. ### Are the MY Solar G&A panels susceptible to LID (Light-Induced Degradation)? No. The N-Type TOPCon cell architecture used in the G&A series is inherently immune to both LID and LeTID. In P-type PERC cells, these effects cause an initial 1-3% power drop within the first weeks of operation. N-type silicon does not contain the boron base responsible for light-activated defects, so the MY Solar G&A module delivers its full rated output from day one of operation. ### Are the MY Solar G&A 620 Wp modules suitable for ground-mounted utility-scale PV installations? Yes, the G&A N-Type TOPCon Bifacial series is designed with ground-mounted systems in mind. At 620 Wp, the module reduces the number of panels and overall BoS costs per megawatt. The bifacial design maximizes albedo gain at ground level, and the 30-year power warranty supports long-term LCOE calculations essential for utility-scale project financing. ### How does the MY Solar G&A N-Type TOPCon series compare to older P-Type PERC panels from the same manufacturer? The main advantages of the G&A series over P-Type PERC are: no LID effect, a better temperature coefficient (-0.30%/°C vs. ~-0.40%/°C), module efficiency exceeding 22%, and bifacial energy harvest that standard PERC panels typically lack. The power warranty is also extended to 30 years versus the typical 25 years for legacy PERC series, resulting in a substantially better LCOE over the system's lifetime. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/mysolar-product-catalogue2-19f4624d17c2.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [AIKO AIKO-A650-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a650-mae72mw) | 650 W | Cooler, lighter, +2.2 pp | | [AIKO AIKO-A645-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a645-mae72mw) | 645 W | Cooler, lighter, +2.1 pp | | [AIKO AIKO-G670-MCH72Mw](https://comparepv.com/panel/aiko-aiko-g670-mch72mw) | 670 W | +50 W, lighter, +1.9 pp | | [Longi Solar LR7-72HVHF-670M](https://comparepv.com/panel/longi-lr7-72hvhf-670m) | 670 W | +50 W, lighter, +1.9 pp | | [AIKO AIKO-A640-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a640-mae72mw) | 640 W | Cooler, lighter, +1.9 pp | | [Jinko Solar JKM650-670N-66QL6-BDV (670W class)](https://comparepv.com/panel/jinko-solar-jkm650-670n-66ql6-bdv-670w-class) | 670 W | +50 W, cooler, +1.9 pp | | [MY Solar MS600N-DHBGA](https://comparepv.com/panel/my-solar-ms600n-dhbga) | 600 W | -20 W, -0.8 pp | | [MY Solar MS605N-DHBGA](https://comparepv.com/panel/my-solar-ms605n-dhbga) | 605 W | -15 W, -0.6 pp | | [MY Solar MS610N-DHBGA](https://comparepv.com/panel/my-solar-ms610n-dhbga) | 610 W | -10 W, -0.4 pp | | [MY Solar MS615N-DHBGA](https://comparepv.com/panel/my-solar-ms615n-dhbga) | 615 W | Very close match | | [AIKO AIKO-A680-MDE72Mw](https://comparepv.com/panel/aiko-aiko-a680-mde72mw) | 680 W | +60 W, cooler, +2.2 pp | | [AIKO AIKO-A675-MDE72Mw](https://comparepv.com/panel/aiko-aiko-a675-mde72mw) | 675 W | +55 W, cooler, +2.1 pp | | [AIKO AIKO-A700-MAE78Dw](https://comparepv.com/panel/aiko-aiko-a700-mae78dw) | 700 W | +80 W, cooler, +2.1 pp | | [WINAICO WST-675BKX72-A2](https://comparepv.com/panel/winaico-wst-675bkx72-a2) | 675 W | +55 W, cooler, +2.1 pp | | [AIKO AIKO-A695-MAE78Dw](https://comparepv.com/panel/aiko-aiko-a695-mae78dw) | 695 W | +75 W, cooler, +1.9 pp | --- Source: https://comparepv.com/panel/my-solar-ms620n-dhbga 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.