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JS Solar Brand review

JS270P

270 Wp Polycrystalline
ComparePV verdict

Middle of its segment, weak in heat

Rank 13,652 of 14,005
Compare panels Datasheet PDF
Power (Wp)
270
Weak · bottom 21%
Efficiency (%)
16.50
Weak · bottom 23%
Density (Wp/m²)
166.0
Weak · bottom 25%
Temp (%/°C)
-0.420
Weak · bottom 8%
Weight (kg)
19.3
Weak · bottom 21%
Warranty (yrs)
25
Typical · median 25 yrs

The JS Solar 60 Series of photovoltaic panels is a solution for investors who want to combine a compact module format with high predictability of performance in real-world conditions. The use of monocrystalline cells and a refined design minimize losses due to parameter mismatches, and also reduce the impact of partial shading - which, in practice, helps maintain more stable energy production on roofs with chimneys, skylights, or nearby trees. These modules are characterized by good performance in low-light conditions, making them suitable for the Polish climate, where efficiency in the morning and afternoon hours is important. For durability, multiple electroluminescence tests, resistance to PID (Potential Induced Degradation), and enhanced mechanical resistance to loads and environmental conditions, including salt and ammonia, are crucial. This makes them a good choice for residential, small business, and commercial installations, where certainty of yield and ease of integration with common components are important.

Ranking

1,154 panels in the 170-370 W band, all technologies
Metric This panel Median Position in segment Overall rank
Module efficiency 16.50% 18.09% Weak · bottom 23% 13,566
Power density 166.0 180.4 Weak · bottom 25% 13,531
Temperature coefficient -0.420 -0.360 Weak · bottom 8% 13,796
Weight per kWp 71.5 63.3 Weak · bottom 21% 13,474
Performance warranty 25 yrs 25 yrs Typical 9,798
Colour key Strong - top 25% Typical - middle 50% Weak - bottom 25%

Signals from the data

4 positive · 6 caution
Best for

Residential and commercial.

Not ideal for

Hot climates, weight-limited structures and tight roof space.

Watch-outs
-0.420 %/°C temperature coefficient

Bottom 8% of the 170-370 W band, against a median of -0.360. Ranked 13,796th in the whole database.

71.5 kg per kWp

Bottom 21% of the 170-370 W band, against a median of 63.3.

16.50% module efficiency

Bottom 23% of the 170-370 W band, against a median of 18.09%.

What owners get
Strong low-light performance

Monocrystalline cells deliver higher current density than polycrystalline equivalents, resulting in better energy yield during morning and afternoon hours and on overcast days. This is particularly relevant in the Polish climate, where direct irradiance is limited for a significant portion of the year.

Certified PID, salt mist, and ammonia resistance

The series passed IEC 61215 and IEC 61730 qualification tests along with additional PID resistance, salt mist, and ammonia corrosion procedures. This mitigates laminate-ingress degradation in industrial and agricultural environments, as confirmed by ENF Solar Directory data for the JSS-60P line.

Up to 17.2% efficiency — above peer comparables

Peak module efficiency of 17.2% (280 Wp variant) exceeds Gintech GIN P6F-60 (17.0%) and TPL P-60 Series (17.1%), placing the series in the top quartile of its peer group and on par with Rarlon PV Tech Poly 60-cell (17.21%).

25-year linear power warranty

The manufacturer guarantees a minimum of 80.7% of rated power output over 25 years — meeting the full market standard for mid-range modules and aligning with typical warranty terms offered by larger competitors during the 2014–2021 period.

Trade-offs
Series discontinued (end-of-life 2021)

The 60 Series reached end-of-life in 2021, meaning no new modules have been commercially available for over four years. Expanding an existing installation with identical modules is impractical, and access to service support, certified replacement components, and up-to-date technical documentation is severely limited.

Non-Tier-1, non-bankable manufacturer

JS Solar does not appear on the BNEF Tier-1 bankable manufacturers list (confirmed as of Q1 2026). This creates material obstacles for securing project finance from banks for commercial-scale systems and raises due-diligence requirements from insurers and infrastructure funds.

Efficiency well below current-generation standards

Modern monocrystalline PERC, TOPCon, and HJT modules routinely achieve 20–22% efficiency. On a roof with a fixed mounting area, a new installation using current-generation panels would produce approximately 15–25% more energy than one based on the 60 Series, significantly worsening LCOE in space-constrained scenarios.

Notes from the database
  • At 16.5% efficiency, this panel is 5.3pp below the database median of 21.8%
  • 166.0 W/m² power density is 52.1 W/m² below database median (218.1 W/m²) - requires larger installation area
  • At -0.42%/°C, loses 0.12pp more power per degree than database median (-0.30%/°C)
  • Weight of 19.3 kg (7.2 kg below database median of 26.5 kg) allows easier transport and roof mounting
  • Ranked #13566 out of 14005 panels for efficiency in the database

Specifications

Open datasheet PDF
Nominal power (Pmax) 270 Wp Nameplate at 1000 W/m², 25 °C
Module efficiency 16.50 % Weak Segment median 18.09%
Vmpp · Impp 31.69 V · 8.52 A Operating point at max power
Voc · Isc 38.43 V · 9.09 A Sizes the string length
Max system voltage 1500 V Longer strings than 1000 V modules
Dimensions 1640×992×35 mm · 1.63 m² of roof
Weight 19.3 kg Weak Weak · bottom 21%
Cells 60 Polycrystalline
Coefficient Pmax -0.420 %/°C Weak bottom 8% of its segment
Coefficient Voc · Isc -0.320 · 0.060 %/°C
NOCT 45 °C At 800 W/m², 20 °C ambient
Product warranty 10 years Hardware defects only
Performance warranty 25 years Typical median 25 yrs · median 25 yrs
End-of-warranty output 80.2 % Equals 207 W guaranteed
Degradation 3.00 → 0.70 % 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
-0.420 %/°C against a segment median of -0.360
-

Alternatives

All JS Solar panels
Filter these
Size
Panel Power Eff. Temp. Weight Difference
JS Solar JS270P 270 W 16.50% -0.420 19.3 kg You are here
CS3K-320P 320 W 19.30% -0.360 18.5 kg +50 W, cooler, +2.8 pp
CS3K-315P 315 W 19.00% -0.360 18.5 kg +45 W, cooler, +2.5 pp
LNSK-320M 320 W 18.90% -0.360 21.0 kg +50 W, cooler, +2.4 pp
CS3K-310P-AG 310 W 18.70% -0.360 22.5 kg Cooler, +2.2 pp, +5 yr warranty
RL310HP-120 310 W 18.60% -0.390 18.5 kg +40 W, cooler, +2.1 pp
LNSK-315P 315 W 18.60% -0.360 21.0 kg +45 W, cooler, +2.1 pp
CS3K-310PB-AG 310 W 18.40% -0.360 22.3 kg Cooler, +1.9 pp, +5 yr warranty
JS260P 260 W 15.90% -0.420 19.3 kg -10 W, -0.6 pp
JS265P 265 W 16.20% -0.420 19.3 kg -0.3 pp
JS275P 275 W 16.80% -0.420 19.3 kg +0.3 pp
JS280P 280 W 17.20% -0.420 19.3 kg +10 W, +0.7 pp
JS305M 305 W 18.75% -0.420 18.0 kg +35 W, lighter, +2.2 pp
JS310M 310 W 19.05% -0.420 18.0 kg +40 W, lighter, +2.6 pp
JS315M 315 W 19.36% -0.420 18.0 kg +45 W, lighter, +2.9 pp
JS320M 320 W 19.67% -0.420 18.0 kg +50 W, lighter, +3.2 pp
SPR-MAX3-400-COM 400 W 22.60% -0.270 19.0 kg Cooler, +6.1 pp, +15 yr warranty

Found 182 panels of the same or similar size to this one, within ±10 mm. See them here Found 218 panels of the same or similar size to this one, within ±25 mm. See them here Found 379 panels of the same or similar size to this one, within ±50 mm. See them here Found 472 panels of the same or similar size to this one, within ±100 mm. See them here

Common questions

6 answered
Is the JS Solar 60 Series still available for purchase?
The JS Solar 60 Series has been discontinued and is no longer offered as a new product. Limited stock may still be available through distributors' warehouses. If you need a comparable replacement with a similar compact format, consider newer JS Solar series or other currently produced entry-level monocrystalline modules.
What warranty does the JS Solar 60 Series come with?
JS Solar provides a 10-year product warranty covering materials and workmanship, plus a 25-year power output warranty. After 25 years the module is guaranteed to retain at least 80.2% of its rated power. This is a standard warranty scope for monocrystalline panels in the prosumer and light commercial segment.
How does the JS Solar 60 Series perform under cloudy skies in a Central European climate?
The monocrystalline cells used in the 60 Series deliver solid low-light performance, generating power efficiently under overcast skies and during morning or evening hours. In Poland's climate, where diffuse radiation is common, this translates into a higher annual energy yield compared to modules with weaker low-irradiance characteristics — one of the key advantages highlighted by the manufacturer.
What is PID resistance, and is it present in the JS Solar 60 Series?
PID (Potential Induced Degradation) is a form of accelerated aging triggered by high system voltage, causing a gradual drop in module power output. The JS Solar 60 Series is certified PID-resistant, minimizing this risk in standard residential and commercial PV systems and helping the module maintain consistent output throughout its 25-year power warranty period.
Is the JS Solar 60 Series suitable for a roof with chimneys, dormers, or nearby trees?
Yes. The 60 Series is engineered to minimize mismatch losses caused by partial shading from chimneys, dormers, or nearby trees. When part of the array is shaded, the string loses less power than older designs. For particularly challenging roof layouts, pairing the modules with power optimizers or microinverters will further improve overall system yield.
What is the rated power of the JS Solar 60 Series, and what type of installations is it designed for?
The JS Solar 60 Series offers modules rated up to 280 Wp. With compact dimensions of approximately 1,640 × 992 mm and a weight of around 18 kg, they fit well on residential roofs, small commercial buildings, and constrained roof areas. They are a practical choice wherever reliable energy production at a moderate BoS cost is the priority.
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