JS Solar Brand review

JSHC166M120-370

370 Wp Monocrystalline

53 of 100

ComparePV verdict

Middle of its segment, short guarantee

Rank 12,894 of 14,005

Compare panels Datasheet PDF

Power (Wp)

370

Weak · bottom 17%

Efficiency (%)

20.97

Typical · median 21.06%

Density (Wp/m²)

203.2

Typical · median 210.3

Temp (%/°C)

-0.340

Typical · median -0.320

Weight (kg)

20.2

Typical · median 22.0 kg

Warranty (yrs)

Weak · bottom 21%

The JS Solar JSHC166M120 series consists of advanced photovoltaic modules that utilize half-cut cell technology to maximize energy yields in real-world installation conditions. Thanks to the use of M6 standard silicon wafers with a size of 166 mm, these panels offer an excellent power-to-area ratio, making them an ideal choice for installations with limited roof space. A key distinguishing feature of the series is the multi-busbar design, which not only reduces resistive losses but also significantly limits the risk of micro-cracks under the influence of varying temperatures. These modules effectively solve the problem of performance drops during partial shading, allowing for stable system operation even in more challenging location conditions. They are intended for both individual prosumers and commercial investors looking for reliable components with high resistance to mechanical loads, such as heavy snow or strong wind gusts. Compared to the competition, JS Solar JSHC166M120 stands out with its excellent material durability and certified resistance to ammonia and salt corrosion, which guarantees a long power plant lifespan even in demanding agricultural or coastal environments. This is a sound choice for professionals focusing on proven engineering and investment cost optimization.

Ranking

5,700 panels in the 270-470 W band, all technologies

Metric This panel Median Position in segment Overall rank

Module efficiency 20.97% 21.06% Typical 9,969

Power density 203.2 210.3 Typical 11,739

Temperature coefficient -0.340 -0.320 Typical 8,778

Weight per kWp 54.6 53.7 Typical 8,947

Performance warranty 25 yrs 30 yrs Weak · bottom 21% 9,798

Colour key Strong - top 25% Typical - middle 50% Weak - bottom 25%

Signals from the data

5 positive · 3 caution

Not ideal for

Owners who want a long output guarantee.

Watch-outs

25 year performance warranty

Bottom 21% of the 270-470 W band, against a median of 30 yrs.

What owners get

Peak efficiency 21.3% — segment leader

The top-bin variant reaches 21.3% module efficiency, outperforming all peer comparables: ENCOR EC (20.59%), Boviet GAMMA SERIES™ (20.2%), and Boviet VEGA SERIES (20.0%). For space-constrained rooftops, this translates into meaningfully higher power output per m².

Half-cut cells + multi-busbar (MBB)

Halving the cell reduces per-string current by 50%, cutting I²R resistive losses and lowering hot-spot risk under partial shading. The MBB design reduces thermal stress in silver paste interconnects, statistically decreasing LeTID micro-crack incidence over the module's service life.

Dual corrosion-resistance certification

The series carries verified salt-mist resistance (IEC 61701) and ammonia corrosion resistance (IEC 62716) — no peer comparable (Boviet VEGA, Boviet GAMMA, ENCOR EC) lists both certifications simultaneously. This provides a genuine advantage for agrivoltaic and coastal installations where accelerated frame and bypass-diode degradation is a known risk.

M6 wafer (166 mm) — mature cell format

The M6 166 mm format is one of the most thoroughly validated wafer standards in the PV industry, with multi-source wafer availability. Unlike the newer G12 (210 mm) format, it avoids racking and transport compatibility issues with standard steel mounting systems commonly used in European residential and C&I installations.

25-year linear power warranty

The manufacturer guarantees a linear power degradation schedule for 25 years, matching the warranty terms of all peer comparables. The guaranteed residual power after year 25 (typically ≥80.7%) supports LCOE assumptions for residential prosumers and small commercial projects.

Trade-offs

Not BNEF Tier-1 bankable

JS Solar does not appear on the BNEF Tier-1 PV module manufacturer list (Q1 2026), while direct peer comparable Boviet Solar holds that status. For projects financed on a non-recourse basis by lenders requiring Tier-1 modules, the JSHC166M120 series may be excluded from approved component lists without additional manufacturer due diligence.

Monofacial only — no bifacial variant

The series offers no bifacial option, whereas the Boviet VEGA SERIES (same max power of 375 Wp) is available in a bifacial configuration with a potential 5–15% yield gain from ground albedo. For ground-mounted systems on reflective substrates or green rooftops, the absence of a bifacial option results in a measurable long-term energy yield disadvantage.

Notes from the database

At 21.0% efficiency, this panel is 0.9pp below the database median of 21.8%
203.2 W/m² power density is 14.9 W/m² below database median (218.1 W/m²) - requires larger installation area
-0.34%/°C temperature coefficient - 0.04pp worse than database median (-0.30%/°C), expect higher hot weather losses
Weight of 20.2 kg (6.3 kg below database median of 26.5 kg) allows easier transport and roof mounting
Ranked #9969 out of 14005 panels for efficiency in the database

Specifications

Open datasheet PDF

Nominal power (Pmax) 370 Wp Nameplate at 1000 W/m², 25 °C

Module efficiency 20.97 % Typical Segment median 21.06%

Vmpp · Impp 31.08 V · 11.91 A Operating point at max power

Voc · Isc 37.44 V · 12.69 A Sizes the string length

Max system voltage 1500 V Longer strings than 1000 V modules

Dimensions 1754×1038×35 mm · 1.82 m² of roof

Weight 20.2 kg Typical Typical · median 22.0 kg

Cells 120 Monocrystalline

Coefficient Pmax -0.340 %/°C Typical median -0.320 of its segment

Coefficient Voc · Isc -0.250 · 0.040 %/°C

NOCT 43 °C At 800 W/m², 20 °C ambient

Performance warranty 25 years Weak bottom 21% · median 30 yrs

End-of-warranty output 84.8 % Equals 304 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

Irradiance Energy price Price inflation 0%/yr

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

Heat losses

-0.340 %/°C against a segment median of -0.320

Try your own cell temperature (°C) 60° · - · -

Alternatives

All JS Solar panels

Filter these Similar power Same cell type Same manufacturer

Size Any ±10 mm ±25 mm ±50 mm ±100 mm

Panel Power Eff. Temp. Weight Difference

JS Solar JSHC166M120-370 370 W 20.97% -0.340 20.2 kg You are here

NS-330MH-80 330 W 23.15% -0.290 15.0 kg Cooler, lighter, +2.2 pp

NS-330MH-80 330 W 23.15% -0.290 15.0 kg Cooler, lighter, +2.2 pp

GKA210M320W 320 W 23.00% - 16.2 kg -50 W, +2.0 pp, +5 yr warranty

GKA210M340W 340 W 23.00% - 16.2 kg Lighter, +2.0 pp, +5 yr warranty

GKA210M360W 360 W 23.00% - 16.2 kg Lighter, +2.0 pp, +5 yr warranty

GKA210M380W (1/4*4*38) 380 W 23.00% - 17.1 kg Lighter, +2.0 pp, +5 yr warranty

GKA210M400W (1/2*4*20) 400 W 23.00% - 18.0 kg +30 W, +2.0 pp, +5 yr warranty

GKA210M400W (1/4*4*40) 400 W 23.00% - 18.0 kg +30 W, +2.0 pp, +5 yr warranty

GKA210M380W (1/2*4*19) 380 W 23.00% - 17.1 kg Lighter, +2.0 pp, +5 yr warranty

SPR-MAX3-400-COM 400 W 22.60% -0.270 19.0 kg Cooler, +1.6 pp, +15 yr warranty

JSHC166M120-350 350 W 18.90% -0.340 20.2 kg -20 W, -2.1 pp

JSHC166M120-355 355 W 20.20% -0.340 20.2 kg -15 W, -0.8 pp

JSHC166M120-360 360 W 20.50% -0.340 20.2 kg -10 W, -0.5 pp

JSHC166M120-365 365 W 20.70% -0.340 20.2 kg -0.3 pp

JSHC166M120-375 375 W 21.30% -0.340 20.2 kg +0.3 pp

LR7-54HJD-510M 510 W 25.00% -0.240 23.5 kg +140 W, cooler, +4.0 pp

Found 170 panels of the same or similar size to this one, within ±10 mm. See them here Found 257 panels of the same or similar size to this one, within ±25 mm. See them here Found 332 panels of the same or similar size to this one, within ±50 mm. See them here Found 4137 panels of the same or similar size to this one, within ±100 mm. See them here

Common questions

6 answered

What are half-cut cells in the JS Solar JSHC166M120 series and what do they mean in practice?

Half-cut cells are standard monocrystalline cells sliced in half, which reduces the current flowing through each half and lowers resistive losses. In practice this means higher output power and better tolerance for partial shading. The JSHC166M120 series pairs this technology with a multi-busbar design that further minimizes microcrack risk and extends module service life under variable thermal conditions.

How does the JS Solar JSHC166M120 series handle partial shading from a chimney or trees?

Thanks to the half-cut design, each module is divided into two independent electrical sections. If shade covers only part of the panel, the shaded section operates on its own without blocking current flow through the rest of the array. Energy losses under partial shading are noticeably lower than with conventional full-cell modules, resulting in a higher annual energy yield even in challenging locations.

What is the power warranty on the JS Solar JSHC166M120 series?

JS Solar provides a 25-year linear power warranty on the JSHC166M120 series, guaranteeing that module output stays above a defined threshold throughout the entire period — a standard comparable to leading market brands. The product warranty covering material and workmanship defects is typically 10–12 years. Confirm exact terms with your local distributor before purchase.

Can the 375 W JS Solar JSHC166M120 panel withstand heavy snow loads and strong winds?

Yes. The JSHC166M120 series is built for high mechanical resistance. Modules are rated for snow loads up to 5,400 Pa and wind loads up to 2,400 Pa, corresponding to deep snow cover and strong wind gusts. The multi-busbar construction distributes mechanical stress across a greater number of busbars, minimizing microcracks caused by cyclic temperature changes and dynamic loading.

Is the JS Solar JSHC166M120 suitable for farm installations or coastal locations?

Yes. The JSHC166M120 series holds certifications confirming resistance to ammonia corrosion, common in livestock farming environments, and to salt mist corrosion found in coastal areas. This ensures the modules maintain their structural integrity and performance output across the full 25-year service life — a key differentiator compared to cheaper modules lacking these certifications.

Is JS Solar a Tier 1 manufacturer, and is it worth buying panels from this brand?

JS Solar is not currently listed in the Bloomberg NEF Tier 1 ranking, meaning it is not classified among the largest, most financially backed manufacturers. For residential and smaller commercial installations this is rarely a barrier — the JSHC166M120 carries verified quality certifications and a solid technical specification. When purchasing, ensure you work with an authorized distributor and confirm how the warranty is handled locally.

Add to compare