--- title: "Goldi Solar GS10-M144-BF-555 555W Solar Panel - Specs & Review | ComparePV" description: "Goldi Solar GS10-M144-BF-555 555W solar panel. Specs: 21.50% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/goldi-solar-gs10-m144-bf-555" updated: 2026-09-11 --- # Goldi Solar GS10-M144-BF-555 Space saver, short guarantee 589 panels in the segment PERC 550-600 W ## Identity - **Manufacturer:** Goldi Solar - **Model:** GS10-M144-BF-555 - **Series:** GS10-M144-BF (HELOC PRO) - **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 | 21.50% | 21.29% | Strong - top 18% | 7,958 | | Power density | 214.9 | 212.9 | Strong - top 15% | 8,019 | | Temperature coefficient | -0.350 | -0.350 | Typical | 10,419 | | Weight (kg) | 28.0 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 | 21.50% | 21.29% | Strong - top 18% | 7,958 | | Power density | 214.9 | 212.9 | Strong - top 15% | 8,019 | | Temperature coefficient | -0.350 | -0.350 | Typical | 10,419 | | Weight per kWp | 50.5 | 52.7 | Typical | 3,817 | | Performance warranty | 25 yrs | 27 yrs | Weak - bottom 24% | 9,798 | ### Strengths - **214.9 watts per square metre** - Top 15% of the PERC 550-600 W segment, against a median of 212.9. - **21.50% module efficiency** - Top 18% of the PERC 550-600 W segment, against a median of 21.29%. ### 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:** 21.50 % - **Voltage at Pmax (Vmp):** 42.64 V - **Current at Pmax (Imp):** 12.99 A - **Open-circuit voltage (Voc):** 51.18 V - **Short-circuit current (Isc):** 13.44 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:** 0.048 %/degC - **NOCT:** 45 degC ### Cell and construction - **Cell type:** Monocrystalline - **Cell technology:** PERC - **Cell count:** 144 - **Bifacial:** yes ### Physical - **Length:** 2279 mm - **Width:** 1133 mm - **Thickness:** 35 mm - **Weight:** 28.0 kg - **Area:** 2.58 m2 - **Power density:** 214.9 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:** 455 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 7958 of 14005 | | Power density | 8019 of 14005 | | Temperature coefficient | 10419 of 14005 | | Weight | 3817 of 14005 | | Warranty | 9798 of 14005 | ## Pros - **Efficiency on Par with Top Peer Comparables** - The upper end of the series at 21.7% (560 Wp model) matches the Exiom EX540-560M(B) (21.7%) and falls only 0.02 percentage points below the DAH Solar DHM-T72X10/BF/FS (21.72%). This places the series firmly at the top of the 144-cell bifacial PERC segment, conceding nothing to its direct competition. - **Bifacial PERC – Additional Yield from Albedo** - The bifacial design enables capture of light reflected from the ground surface. At a typical ground albedo of 15–25%, this translates to a real-world 5–15% increase in annual energy yield compared to a monofacial equivalent — particularly significant in ground-mount, flat-roof, and utility-scale PV installations. - **BNEF Tier 1 Bankable Since at Least Q1 2020** - Goldi Solar has maintained BNEF Tier 1 bankable status since at least Q1 2020, with continued confirmation on subsequent lists. As a result, modules qualify for project finance and PPA agreements without additional manufacturer due diligence — a critical factor for utility-scale and commercial PV projects. - **Half-Cut + Multi-Busbar (MBB)** - The combination of half-cut cell technology — which halves the current per string, reducing I²R resistive losses by ~75% — with a multi-busbar (MBB) architecture shortens current paths and improves resistance to both transportation-induced and fatigue-related microcracks. The net result is a lower degradation rate over the long-term operational horizon. - **Confirmed PID Resistance and Low-Light Performance** - Textured glass and enhanced resistance to Potential Induced Degradation (PID) ensure that modules maintain high output under both diffuse irradiance conditions — typical for Poland, where approximately 40–50% of annual insolation is diffuse — and in long-term high-voltage system deployments. ## Cons - **P-type PERC vs. Newer N-type TOPCon** - The typical temperature coefficient of PERC is approximately -0.35%/°C, whereas N-type TOPCon modules available in the same power class achieve -0.28 to -0.30%/°C. At a cell temperature of 65°C — a realistic scenario during Polish summers on dark rooftops — this gap translates to roughly 2.5% less yield, a non-trivial difference in LCOE over a 25-year horizon. PERC remains cost-competitive, but it is no longer the technology frontier. ## About this series The Goldi Solar GS10-M144-BF (HELOC PRO) series is designed for installations where maximizing power output from a given area and stable performance in challenging conditions are crucial. The use of a **half-cut** design minimizes resistance losses and improves module performance under partial shading, which is particularly beneficial on roofs with obstructions and in residential settings. Another key feature is the **multi-busbar technology**, which supports better current transfer and increases resistance to microcracks that can occur during transportation or operation. These modules also feature refined optics - **textured glass and cell surfaces** - which maintain high productivity even in less sunny conditions. An additional advantage is the **enhanced PID resistance**, which translates to less degradation and more reliable performance over the long term. HELOC PRO is a good choice for rooftop and commercial installations, as well as for PV farms, where lower energy costs and predictable yields are important. ## Notable figures - At 21.5% efficiency, this panel is on par with typical \*\*PERC 550-600W\*\* modules - Power density of 214.9 W/m² matches the \*\*PERC 550-600W\*\* median - At -0.35%/°C, hot weather performance is typical for \*\*PERC 550-600W\*\* panels - At 28.0 kg, this panel is 2.8 kg lighter than \*\*PERC 550-600W\*\* median (30.8 kg) - easier handling during installation - In the top 57% for efficiency among all PERC panels ## Questions ### Is the Goldi Solar GS10-M144-BF HELOC PRO a bifacial module, and how much extra energy can I expect from the rear side? Yes, the GS10-M144-BF HELOC PRO is a bifacial module — the rear side of the cells absorbs light reflected from the surface beneath the array (gravel, white roofing membrane, grass). Real-world bifacial gain depends on surface albedo and tilt angle, and typically ranges from 5% to 15% additional output. The highest gains are achieved in ground-mounted systems and flat-roof installations with light-colored surfaces. ### What warranty does the Goldi Solar HELOC PRO GS10-M144-BF come with? The GS10-M144-BF HELOC PRO modules come with a 12-year product warranty covering manufacturing defects and material failures, plus a 25-year linear power output warranty guaranteeing minimum performance over the panel's operational lifetime. These are standard Tier 1 warranty terms. When purchasing, confirm that the distributor provides in-country warranty support for your region. ### Do the HELOC PRO GS10-M144-BF panels perform well on roofs with chimneys or dormers? Yes, the series uses a half-cut cell architecture with 144 cells split in half, dividing the module into independent electrical sections. Shading from a chimney or dormer affects only part of the module without fully blocking the remaining sections. The multi-busbar design further shortens current paths and reduces resistive losses, improving overall output under uneven or low irradiance conditions. ### What is PERC technology and why is it used in the Goldi Solar HELOC PRO series? PERC (Passivated Emitter and Rear Cell) adds a passivation layer to the rear of the silicon cell, reflecting unabsorbed photons back for a second conversion pass. Compared to conventional BSF cells, this improves conversion efficiency by several percentage points. In the HELOC PRO series, PERC is combined with half-cut and multi-busbar design, enabling a peak output of up to 560 Wp from a 144-cell module. ### Where is Goldi Solar based, and are they a reliable PV manufacturer? Goldi Solar is headquartered in India and holds Tier 1 status from independent PV industry rating agencies. Tier 1 classification indicates financial stability, in-house manufacturing capacity, and a track record of bankable project financing. For installers and investors, this is a meaningful indicator of long-term reliability and warranty fulfillment throughout the 25-year guaranteed module lifespan. ### Are the GS10-M144-BF HELOC PRO modules resistant to PID degradation? Yes, the GS10-M144-BF HELOC PRO modules feature enhanced resistance to PID (Potential Induced Degradation), a phenomenon that can cause significant power loss in high-voltage string systems, especially in humid climates. The improved PID resistance keeps real-world energy yields closer to nameplate values over time and reduces long-term power degradation, which is especially important in commercial rooftop and utility-scale PV installations. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/GOLDI-Datasheet-GS10-M144-BF-525Wp-560Wp-85883459d245.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [Longi Solar LR7-54HJD-510M](https://comparepv.com/panel/longi-lr7-54hjd-510m) | 510 W | Cooler, +3.5 pp, +5 yr warranty | | [Longi Solar LR7-60HVH-560M](https://comparepv.com/panel/longi-lr7-60hvh-560m) | 560 W | Cooler, +3.3 pp, +5 yr warranty | | [Longi Solar LR7-54HJD-505M](https://comparepv.com/panel/longi-lr7-54hjd-505m) | 505 W | -50 W, cooler, +3.2 pp | | [Longi Solar LR7-60HVH-555M](https://comparepv.com/panel/longi-lr7-60hvh-555m) | 555 W | Cooler, +3.1 pp, +5 yr warranty | | [Longi Solar LR7-60HVHL-550M](https://comparepv.com/panel/longi-lr7-60hvhl-550m) | 550 W | Cooler, lighter, +2.9 pp | | [JA Solar JAT60S40-540/LR](https://comparepv.com/panel/ja-solar-jat60s40-540-lr) | 540 W | Cooler, +2.9 pp, +5 yr warranty | | [Goldi Solar GS10-M144-BF-525](https://comparepv.com/panel/goldi-solar-gs10-m144-bf-525) | 525 W | -30 W, -1.2 pp | | [Goldi Solar GS10-M144-BF-530](https://comparepv.com/panel/goldi-solar-gs10-m144-bf-530) | 530 W | -25 W, -1.0 pp | | [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/goldi-solar-gs10-m144-bf-555 Not in this file, on the page: a thirty-year output simulator and alternatives filtered by how closely they match these dimensions.