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Goldi Solar GS10-B120-GF-435
Goldi Solar Brand review

GS10-B120-GF-435

435 Wp PERC Bifacial 70%
ComparePV verdict

Strong in heat, needs the roof space

Rank 11,787 of 14,005
Compare panels Datasheet PDF
Power (Wp)
435
Strong · top 22%
Efficiency (%)
20.10
Weak · bottom 16%
Density (Wp/m²)
201.0
Weak · bottom 15%
Temp (%/°C)
-0.320
Strong · top 5%
Weight (kg)
24.0
Typical · median 22.0 kg
Warranty (yrs)
25
Typical · median 25 yrs

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.

Ranking

954 panels in the segment PERC 400-450 W
Metric This panel Median Position in segment Overall rank
Module efficiency 20.10% 20.60% Weak · bottom 16% 12,102
Power density 201.0 206.2 Weak · bottom 15% 12,112
Temperature coefficient -0.320 -0.350 Strong · top 5% 8,312
Weight per kWp 55.2 53.0 Typical 9,588
Performance warranty 25 yrs 25 yrs Typical 9,798
Colour key Strong - top 25% Typical - middle 50% Weak - bottom 25%

Signals from the data

6 positive · 3 caution
Best for

Commercial, utility-scale and shaded-installations.

Not ideal for

Roofs where every square metre has to count and tight roof space.

Strengths
-0.320 %/°C temperature coefficient

Top 5% of the PERC 400-450 W segment, against a median of -0.350. Ranked 8,312th in the whole database.

Watch-outs
201.0 watts per square metre

Bottom 15% of the PERC 400-450 W segment, against a median of 206.2.

20.10% module efficiency

Bottom 16% of the PERC 400-450 W segment, against a median of 20.60%.

What owners get
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.

Trade-offs
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.

Notes from the database
  • At 20.1% efficiency, this panel is on par with typical PERC 400-450W modules
  • Power density of 201.0 W/m² is 5.2 W/m² below PERC 400-450W median (206.2 W/m²) - needs more roof space
  • At -0.32%/°C (vs median -0.35%/°C), loses ~1% less power in hot conditions
  • Weight of 24.0 kg is 2.0 kg above PERC 400-450W median (22.0 kg) - verify structural support
  • Bifaciality factor of 70% can add 4-10% extra yield with reflective mounting surface

Specifications

Open datasheet PDF
Nominal power (Pmax) 435 Wp Nameplate at 1000 W/m², 25 °C
Module efficiency 20.10 % Weak Segment median 20.60%
Vmpp · Impp 36.03 V · 12.05 A Operating point at max power
Voc · Isc 41.02 V · 13.34 A Sizes the string length
Max system voltage 1500 V Longer strings than 1000 V modules
Dimensions 1910×1133×35 mm · 2.16 m² of roof
Weight 24.0 kg Typical Typical · median 22.0 kg
Cells 120 · PERC Polycrystalline
Bifaciality 70 % Rear output as a share of front
Coefficient Pmax -0.320 %/°C Strong top 5% of its segment
Coefficient Voc · Isc -0.250 · 0.050 %/°C
NOCT 45 °C At 800 W/m², 20 °C ambient
Product warranty 12 years Hardware defects only
Performance warranty 25 years Typical median 25 yrs · median 25 yrs
End-of-warranty output 84.8 % Equals 357 W guaranteed
Degradation 2.00 → 0.55 % First year, then annual

Simulations

Live - change any input
Lifetime output & value
30 years at 1200 kWh/kWp/year and €0.50 per kWh
Power in year 30
-
Lifetime energy
-
Energy value
-
With bifacial gain
-

Degradation from this panel's own datasheet figures. No inverter, soiling or shading losses.

Heat losses
-0.320 %/°C against a segment median of -0.350
-
Bifacial gain
Rear gain over light concrete: -
-

Model: bifaciality × albedo × 0.6 view factor. A first-order estimate, not a yield simulation.

Alternatives

All Goldi Solar panels
Filter these
Size
Panel Power Eff. Temp. Weight Difference
Goldi Solar GS10-B120-GF-435 435 W 20.10% -0.320 24.0 kg You are here
GS10-B120-GF-455 455 W 21.03% -0.320 24.0 kg +20 W, +0.9 pp
GS10-B120-GF-450 450 W 20.79% -0.320 24.0 kg +15 W, +0.7 pp
GS10-B120-GF-445 445 W 20.56% -0.320 24.0 kg +10 W, +0.5 pp
GS10-B120-GF-440 440 W 20.33% -0.320 24.0 kg +0.2 pp
LNSU-410M 410 W 20.31% -0.360 24.5 kg -25 W, hotter, +0.2 pp
LNSU-405M 405 W 20.06% -0.360 24.5 kg -30 W, hotter
CS3U-395P 395 W 19.90% -0.360 22.5 kg -40 W, hotter, lighter
LNSU-400M 400 W 19.81% -0.360 24.5 kg -35 W, hotter, -0.3 pp
LR7-60HVH-560M 560 W 24.80% -0.260 25.0 kg +125 W, cooler, +4.7 pp
LR7-60HVH-555M 555 W 24.60% -0.260 25.0 kg +120 W, cooler, +4.5 pp
LR7-60HVHL-550M 550 W 24.40% -0.260 16.3 kg +115 W, lighter, +4.3 pp
JAT60S40-540/LR 540 W 24.40% -0.260 23.5 kg +105 W, cooler, +4.3 pp
GK-5-60HG-540M 540 W 24.40% -0.260 23.3 kg +105 W, cooler, +4.3 pp
JKM545-54QL6-DV-F1-EU 545 W 24.27% -0.260 27.5 kg +110 W, cooler, +4.2 pp
LR7-60HVH-545M 545 W 24.20% -0.260 25.0 kg +110 W, cooler, +4.1 pp

Found 751 panels of the same or similar size to this one, within ±10 mm. See them here Found 755 panels of the same or similar size to this one, within ±25 mm. See them here Found 1049 panels of the same or similar size to this one, within ±50 mm. See them here Found 1503 panels of the same or similar size to this one, within ±100 mm. See them here

Common questions

6 answered
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.
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