--- title: "Goldi Solar GS10-B108-BF-390 390W Solar Panel - Specs & Review | ComparePV" description: "Goldi Solar GS10-B108-BF-390 390W solar panel. Specs: 19.90% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/goldi-solar-gs10-b108-bf-390" updated: 2026-09-11 --- # Goldi Solar GS10-B108-BF-390 Solid all-round for its segment 579 panels in the segment PERC 350-400 W ## Identity - **Manufacturer:** Goldi Solar - **Model:** GS10-B108-BF-390 - **Series:** HELOC PRO - **Rated power:** 390 W - **Cell technology:** PERC - **Bifacial:** yes ## How it compares Compared against segment PERC 350-400 W (579 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 390 W | 380 W | Typical | | | Module efficiency | 19.90% | 19.90% | Typical | 12,331 | | Power density | 199.0 | 199.0 | Typical | 12,337 | | Temperature coefficient | -0.350 | -0.350 | Typical | 10,419 | | Weight (kg) | 21.0 kg | 21.4 kg | Typical | | | Performance warranty | 25 yrs | 25 yrs | Typical | 9,798 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 19.90% | 19.90% | Typical | 12,331 | | Power density | 199.0 | 199.0 | Typical | 12,337 | | Temperature coefficient | -0.350 | -0.350 | Typical | 10,419 | | Weight per kWp | 53.8 | 55.8 | Typical | 7,897 | | Performance warranty | 25 yrs | 25 yrs | Typical | 9,798 | - **Best for:** Commercial, utility-scale and shaded-installations. ## Specification ### Electrical - **Rated power (Pmax):** 390 W - **Efficiency:** 19.90 % - **Voltage at Pmax (Vmp):** 30.77 V - **Current at Pmax (Imp):** 12.69 A - **Open-circuit voltage (Voc):** 37.00 V - **Short-circuit current (Isc):** 13.41 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:** 108 - **Bifacial:** yes ### Physical - **Length:** 1730 mm - **Width:** 1133 mm - **Thickness:** 35 mm - **Weight:** 21.0 kg - **Area:** 1.96 m2 - **Power density:** 199.0 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:** 320 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 12331 of 14005 | | Power density | 12337 of 14005 | | Temperature coefficient | 10419 of 14005 | | Weight | 7897 of 14005 | | Warranty | 9798 of 14005 | ## Pros - **Up to 23.03% Efficiency (TOPCon)** - TOPCon variants of the HELOC PRO series achieve 23.03% module efficiency, outperforming peer comparables Talesun BISTAR (21.5%) and Seraphim Seco (21.46%) by more than 1.5 percentage points. The result is only marginally surpassed by the Tongwei TWMND (23.2%), which is, however, a bifacial module. - **Kiwa PVEL Top Performer 2024** - Goldi Solar achieved Top Performer status in the 10th edition of the PV Module Reliability Scorecard (2024) — 16 modules in the series received recognition in TC, DH, PID, and LID+LETID testing, independently confirming above-average durability and degradation resistance under real-world conditions. - **BNEF Tier-1 Manufacturer (Bankable)** - Goldi Solar appears on the Bloomberg NEF Tier-1 bankable manufacturers list, facilitating non-recourse project financing for commercial and utility-scale installations. The designation has been maintained continuously since 2020. - **Linear Power Warranty Up to 30 Years** - Dual glass (glass-glass) variants are covered by a 30-year linear power warranty, while peer comparables Talesun and Seraphim offer a standard 25-year warranty. Backsheet versions retain a 25-year warranty — above the market minimum. - **49 Variants: PERC and TOPCon, 390–600 Wp** - The broad portfolio within a single series — ranging from 390 Wp (prosumer installations, space-constrained rooftops) to 600 Wp (ground-mount and commercial projects) across both cell technologies — allows module selection without changing suppliers and simplifies logistics for multi-segment projects. ## Cons - **No Bifacial Option Available** - All 49 HELOC PRO variants are monofacial modules (is\_bifacial: false). The direct peer comparable — Tongwei TWMND 72HD 580–600W — achieves 23.2% efficiency precisely in its bifacial configuration, typically generating 5–15% additional annual energy yield in ground-mount and agri-PV installations through albedo reflection. This limits the series' applicability in projects where bifaciality is a standard tendering requirement. ## About this series The Goldi Solar HELOC PRO series is designed for high performance in real-world conditions, even when space is limited or weather is unfavorable. The modules utilize a **half-cut architecture** and a **multi-busbar technology**, which helps minimize current losses and improves stability under partial shading. The use of advanced glass and textured surface of the cells results in **improved performance in low light**, ensuring that HELOC PRO maintains solid output even in autumn and winter. In practice, this series solves two common problems for investors: the need to maximize energy production from every square meter of roof space, and the risk of power drops due to shading and degradation. It also includes features such as **Anti-PID resistance** and a robust mechanical design. HELOC PRO is suitable for rooftop and ground-mounted installations for businesses, agriculture, and institutional projects. It stands out from the competition due to its **High Efficiency - Low on Carbon** approach, which combines high performance with a focus on reducing the carbon footprint in the manufacturing process. ## Notable figures - At 19.9% efficiency, this panel is on par with typical \*\*PERC 0-400W\*\* modules - 199.0 W/m² power density - 4.6 W/m² more than \*\*PERC 0-400W\*\* median (194.4 W/m²), more power per roof area - Temperature coefficient of -0.35%/°C matches the \*\*PERC 0-400W\*\* median - Ranked #12331 out of 14005 panels for efficiency in the database ## Questions ### What is the warranty on Goldi Solar HELOC PRO panels? Goldi Solar offers a 12-year product warranty (covering materials and workmanship) and a 30-year linear power output warranty on the HELOC PRO series. The 30-year power guarantee is one of the longer commitments available on the market, ensuring the module retains a specified percentage of its rated output over the full warranty period. Both manufacturing defects and gradual cell degradation are covered. ### What is TOPCon technology and why does the HELOC PRO series use it? TOPCon (Tunnel Oxide Passivated Contact) is an N-type silicon cell architecture that delivers higher conversion efficiency and lower annual degradation compared to older PERC cells. Goldi Solar uses TOPCon in the HELOC PRO to achieve module efficiency of around 21.5%, better performance at elevated temperatures, and reduced power loss over the system's lifetime. ### Does the Goldi Solar HELOC PRO perform well under partial shading or on overcast days? Yes. The HELOC PRO combines a half-cut cell layout (156 cells) with multi-busbar technology to minimize current losses caused by partial shading from chimneys, antennas, or dormers. The textured cell surface and advanced glass also improve diffuse light absorption, allowing the modules to maintain solid energy output during autumn and winter months. ### What is the maximum power output of the Goldi Solar HELOC PRO and which installations is it suited for? The top variant in the series reaches 600 Wp. The modules are designed for both rooftop and ground-mounted systems and are well-suited for commercial, agricultural, and institutional projects. The high per-module power output helps maximize energy production from limited roof or land area. ### Is Goldi Solar a Tier 1 manufacturer and where is it based? Yes, Goldi Solar holds Tier 1 status according to Bloomberg NEF, confirming bankability and a recognized market position. The company is headquartered in India and is one of the country's leading PV module manufacturers. Tier 1 status is an important indicator for project financiers and insurers evaluating PV installations. ### What does HELOC PRO stand for and how does this series differ from standard panels? HELOC stands for High Efficiency – Low on Carbon, emphasizing strong performance alongside a reduced carbon footprint in the manufacturing process. Beyond efficiency metrics, the series features Anti-PID protection to prevent voltage-induced cell degradation and a reinforced mechanical design. It is aimed at investors who consider both the economics and the environmental profile of their solar installation. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/GOLDI_Datasheet_GS10-M108-BF_390Wp-415Wp-V12-750555e392d0.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [Luxor Solar LX-440M/182-108+GG](https://comparepv.com/panel/luxor-solar-lx-440m-182-108-gg) | 440 W | +50 W, cooler, +3.2 pp | | [Gamko New Energy GKA210M340W](https://comparepv.com/panel/gamko-new-energy-gka210m340w) | 340 W | -50 W, +3.1 pp, +5 yr warranty | | [Gamko New Energy GKA210M360W](https://comparepv.com/panel/gamko-new-energy-gka210m360w) | 360 W | Lighter, +3.1 pp, +5 yr warranty | | [Gamko New Energy GKA210M380W (1/4\*4\*38)](https://comparepv.com/panel/gamko-new-energy-gka210m380w-1-4-4-38) | 380 W | Lighter, +3.1 pp, +5 yr warranty | | [Gamko New Energy GKA210M400W (1/2\*4\*20)](https://comparepv.com/panel/gamko-new-energy-gka210m400w-1-2-4-20) | 400 W | Lighter, +3.1 pp, +5 yr warranty | | [Gamko New Energy GKA210M400W (1/4\*4\*40)](https://comparepv.com/panel/gamko-new-energy-gka210m400w-1-4-4-40) | 400 W | Lighter, +3.1 pp, +5 yr warranty | | [Gamko New Energy GKA210M380W (1/2\*4\*19)](https://comparepv.com/panel/gamko-new-energy-gka210m380w-1-2-4-19) | 380 W | Lighter, +3.1 pp, +5 yr warranty | | [Jetion JT440SYK(B)](https://comparepv.com/panel/jetion-jt440syk-b) | 440 W | +50 W, cooler, +3.0 pp | | [Goldi Solar GS10-B108-GF-395](https://comparepv.com/panel/goldi-solar-gs10-b108-gf-395) | 395 W | Cooler, +0.2 pp, +5 yr warranty | | [Goldi Solar GS10-B108-BF-400](https://comparepv.com/panel/goldi-solar-gs10-b108-bf-400) | 400 W | +10 W, +0.5 pp | | [Longi Solar LR7-54HJD-510M](https://comparepv.com/panel/longi-lr7-54hjd-510m) | 510 W | +120 W, cooler, +5.1 pp | | [AIKO AIKO-A495-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a495-mce54mw) | 495 W | +105 W, cooler, +4.9 pp | | [Longi Solar LR7-54HJD-505M](https://comparepv.com/panel/longi-lr7-54hjd-505m) | 505 W | +115 W, cooler, +4.8 pp | | [AIKO AIKO-A490-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a490-mce54mw) | 490 W | +100 W, cooler, +4.6 pp | | [Longi Solar LR7-54HJD-500M](https://comparepv.com/panel/longi-lr7-54hjd-500m) | 500 W | +110 W, cooler, +4.6 pp | | [Talesun CIPRO-TN9C54M-500W](https://comparepv.com/panel/talesun-cipro-tn9c54m-500w) | 500 W | +110 W, cooler, +4.6 pp | --- Source: https://comparepv.com/panel/goldi-solar-gs10-b108-bf-390 Not in this file, on the page: a thirty-year output simulator and alternatives filtered by how closely they match these dimensions.