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Goldi Solar GS10-M156-WF-585
Goldi Solar Brand review

GS10-M156-WF-585

585 Wp PERC
ComparePV verdict

Middle of its segment, modest efficiency

Rank 7,235 of 14,005
Compare panels Datasheet PDF
Power (Wp)
585
Typical for its class
Efficiency (%)
20.90
Weak · bottom 21%
Density (Wp/m²)
209.5
Weak · bottom 21%
Temp (%/°C)
-0.340
Typical · median -0.350
Weight (kg)
31.5
Typical · median 30.8 kg
Warranty (yrs)
25
Weak · bottom 24%

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

589 panels in the segment PERC 550-600 W
Metric This panel Median Position in segment Overall rank
Module efficiency 20.90% 21.29% Weak · bottom 21% 10,072
Power density 209.5 212.9 Weak · bottom 21% 9,957
Temperature coefficient -0.340 -0.350 Typical 8,778
Weight per kWp 53.8 52.7 Typical 7,897
Performance warranty 25 yrs 27 yrs Weak · bottom 24% 9,798
Colour key Strong - top 25% Typical - middle 50% Weak - bottom 25%

Signals from the data

5 positive · 4 caution
Best for

Commercial, utility-scale and shaded-installations.

Not ideal for

Tight roof space, roofs where every square metre has to count and owners who want a long output guarantee.

Watch-outs
20.90% module efficiency

Bottom 21% of the PERC 550-600 W segment, against a median of 21.29%.

209.5 watts per square metre

Bottom 21% of the PERC 550-600 W segment, against a median of 212.9.

25 year performance warranty

Bottom 24% of the PERC 550-600 W segment, against a median of 27 yrs.

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 20.9% efficiency, this panel is on par with typical PERC 550-600W modules
  • 209.5 W/m² power density is 3.4 W/m² below PERC 550-600W median (212.9 W/m²) - requires larger installation area
  • At -0.34%/°C, hot weather performance is typical for PERC 550-600W panels
  • Ranked #10072 out of 14005 panels for efficiency in the database

Specifications

Open datasheet PDF
Nominal power (Pmax) 585 Wp Nameplate at 1000 W/m², 25 °C
Module efficiency 20.90 % Weak Segment median 21.29%
Vmpp · Impp 45.11 V · 12.97 A Operating point at max power
Voc · Isc 53.73 V · 13.86 A Sizes the string length
Max system voltage 1500 V Longer strings than 1000 V modules
Dimensions 2465×1133×35 mm · 2.79 m² of roof
Weight 31.5 kg Typical Typical · median 30.8 kg
Cells 156 · PERC Polycrystalline
Coefficient Pmax -0.340 %/°C Typical median -0.350 of its segment
Coefficient Voc · Isc -0.280 · 0.048 %/°C
NOCT 43 °C At 800 W/m², 20 °C ambient
Product warranty 12 years Hardware defects only
Performance warranty 25 years Weak bottom 24% · median 27 yrs
End-of-warranty output 84.8 % Equals 480 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
-

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

Heat losses
-0.340 %/°C against a segment median of -0.350
-

Alternatives

All Goldi Solar panels
Filter these
Size
Panel Power Eff. Temp. Weight Difference
Goldi Solar GS10-M156-WF-585 585 W 20.90% -0.340 31.5 kg You are here
GS10-M156-WF-600 600 W 21.50% -0.340 31.5 kg +15 W, +0.6 pp
GS10-M156-WF-595 595 W 21.30% -0.340 31.5 kg +10 W, +0.4 pp
GS10-M156-WF-590 590 W 21.10% -0.340 31.5 kg +0.2 pp
GS10-M156-WF-580 580 W 20.70% -0.340 31.5 kg Very close match
AIKO-A680-MDE72Mw 680 W 25.20% -0.260 29.0 kg +95 W, cooler, +4.3 pp
AIKO-A675-MDE72Mw 675 W 25.00% -0.260 29.0 kg +90 W, cooler, +4.1 pp
AIKO-A700-MAE78Dw 700 W 25.00% -0.260 34.5 kg +115 W, cooler, +4.1 pp
AIKO-A695-MAE78Dw 695 W 24.90% -0.260 34.5 kg +110 W, cooler, +4.0 pp
AIKO-G670-MCH72Mw 670 W 24.80% -0.260 28.2 kg +85 W, cooler, +3.9 pp
LR7-72HVHF-670M 670 W 24.80% -0.260 28.5 kg +85 W, cooler, +3.9 pp
JKM650-670N-66QL6-BDV (670W class) 670 W 24.80% -0.260 32.5 kg +85 W, cooler, +3.9 pp

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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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