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Renewsys Brand review

DESERV EXTREME 156X-620

620 Wp TOPCon Bifacial 80%
ComparePV verdict

Middle of its segment, heavy for its output

Rank 3,434 of 14,005
Compare panels Datasheet PDF
Power (Wp)
620
Typical for its class
Efficiency (%)
22.23
Weak · bottom 15%
Density (Wp/m²)
222.3
Weak · bottom 15%
Temp (%/°C)
-0.292
Typical · median -0.290
Weight (kg)
34.5
Weak · 1.8 kg above median
Warranty (yrs)
30
Typical · median 30 yrs

The RenewSys DESERV Extreme 156X series answers the growing demand from commercial projects and utility-scale PV farms for modules delivering maximum power density per unit area. The panels rely on N-type TOPCon cells in a half-cut configuration, which improves resistance to microcracks and reduces losses under partial shading compared to conventional PERC modules. The glass-glass, bifacial construction captures light reflected from the ground, boosting energy yield without expanding the installation footprint - directly lowering LCOE over the system's full lifecycle. The large-format 156X wafer paired with a multi-busbar grid improves current collection and reduces series resistance across the cell string. Backed by a durable anodized aluminum frame and a sealed IP68 junction box with bypass diodes, the modules maintain stable performance across a wide temperature range and demanding weather conditions. This series suits both rooftop installations on industrial facilities and large-scale ground-mounted projects, where every percentage point of output matters, along with predictable long-term power degradation backed by an extended manufacturer warranty.

Ranking

1,086 panels in the segment TOPCon 600-650 W
Metric This panel Median Position in segment Overall rank
Module efficiency 22.23% 22.80% Weak · bottom 15% 5,750
Power density 222.3 227.7 Weak · bottom 15% 5,731
Temperature coefficient -0.292 -0.290 Typical 6,056
Weight per kWp 55.6 53.1 Weak · bottom 10% 10,009
Performance warranty 30 yrs 30 yrs Typical 21
Colour key Strong - top 25% Typical - middle 50% Weak - bottom 25%

Signals from the data

0 positive · 3 caution
Best for

Commercial, utility-scale and shaded-installations.

Not ideal for

Weight-limited structures, roofs where every square metre has to count and tight roof space.

Watch-outs
55.6 kg per kWp

Bottom 10% of the TOPCon 600-650 W segment, against a median of 53.1. Ranked 10,009th in the whole database.

222.3 watts per square metre

Bottom 15% of the TOPCon 600-650 W segment, against a median of 227.7.

22.23% module efficiency

Bottom 15% of the TOPCon 600-650 W segment, against a median of 22.80%.

Notes from the database
  • Module efficiency of 22.2% is 0.6pp below average for TOPCon 600-650W panels (median: 22.8%)
  • Power density of 222.3 W/m² is 5.4 W/m² below TOPCon 600-650W median (227.7 W/m²) - needs more roof space
  • At -0.29%/°C, hot weather performance is typical for TOPCon 600-650W panels
  • At 34.5 kg, this panel is 1.8 kg heavier than the TOPCon 600-650W median (32.7 kg) - more demanding for installation crews
  • Bifacial design (80% factor) captures reflected light - adds 4-12% yield on ground-mount or white roof

Specifications

Open datasheet PDF
Nominal power (Pmax) 620 Wp Nameplate at 1000 W/m², 25 °C
Module efficiency 22.23 % Weak Segment median 22.80%
Vmpp · Impp 46.19 V · 13.43 A Operating point at max power
Voc · Isc 56.21 V · 14.07 A Sizes the string length
Max system voltage 1500 V Longer strings than 1000 V modules
Dimensions 2462×1133×35 mm · 2.79 m² of roof
Weight 34.5 kg Weak Weak · 1.8 kg above median
Cells 156 · TOPCon Monocrystalline
Bifaciality 80 % Rear output as a share of front
Coefficient Pmax -0.292 %/°C Typical median -0.290 of its segment
Coefficient Voc · Isc -0.276 · 0.057 %/°C
NOCT 45 °C At 800 W/m², 20 °C ambient
Product warranty 12 years Hardware defects only
Performance warranty 30 years Typical median 30 yrs · median 30 yrs

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
-0.292 %/°C against a segment median of -0.290
-
Bifacial gain
Rear gain over light concrete: -
-

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

Filter these
Size
Panel Power Eff. Temp. Weight Difference
Renewsys DESERV EXTREME 156X-620 620 W 22.23% -0.292 34.5 kg You are here
AIKO-A650-MAE72Mw 650 W 25.20% -0.260 27.0 kg Cooler, lighter, +3.0 pp
AIKO-A645-MAE72Mw 645 W 25.00% -0.260 27.0 kg Cooler, lighter, +2.8 pp
AIKO-G670-MCH72Mw 670 W 24.80% -0.260 28.2 kg +50 W, lighter, +2.6 pp
LR7-72HVHF-670M 670 W 24.80% -0.260 28.5 kg +50 W, lighter, +2.6 pp
AIKO-A640-MAE72Mw 640 W 24.80% -0.260 27.0 kg Cooler, lighter, +2.6 pp
JKM650-670N-66QL6-BDV (670W class) 670 W 24.80% -0.260 32.5 kg +50 W, cooler, +2.6 pp
DESERV EXTREME 156X-615 615 W 22.05% -0.292 34.5 kg Very close match
DESERV EXTREME 156X-625 625 W 22.41% -0.292 34.5 kg Very close match
DESERV EXTREME 156X-630 630 W 22.59% -0.292 34.5 kg +10 W, +0.4 pp
DESERV EXTREME 156X-635 635 W 22.76% -0.292 34.5 kg +15 W, +0.5 pp
DESERV EXTREME 156X-640 640 W 22.94% -0.292 34.5 kg +20 W, +0.7 pp
DESERV EXTREME 156X-645 645 W 23.12% -0.292 34.5 kg +25 W, +0.9 pp
DESERV EXTREME 156X-650 650 W 23.30% -0.292 34.5 kg +30 W, +1.1 pp
AIKO-A680-MDE72Mw 680 W 25.20% -0.260 29.0 kg +60 W, lighter, +3.0 pp
AIKO-A675-MDE72Mw 675 W 25.00% -0.260 29.0 kg +55 W, lighter, +2.8 pp
AIKO-A700-MAE78Dw 700 W 25.00% -0.260 34.5 kg +80 W, cooler, +2.8 pp

Found 616 panels of the same or similar size to this one, within ±10 mm. See them here Found 616 panels of the same or similar size to this one, within ±25 mm. See them here Found 616 panels of the same or similar size to this one, within ±50 mm. See them here Found 1813 panels of the same or similar size to this one, within ±100 mm. See them here

Common questions

6 answered
How does the RenewSys DESERV Extreme 156X series differ from classic PERC panels?
The DESERV Extreme 156X uses N-type TOPCon cells instead of standard P-type PERC cells. This results in higher efficiency, a lower annual degradation rate, and better resistance to LID and PID. In practice, this means higher energy yield over the system's lifetime and more stable performance at elevated temperatures compared to PERC modules.
Do the bifacial DESERV Extreme 156X panels actually increase energy production?
Yes, the glass-glass construction allows the rear side of the module to capture light reflected from the roof, ground, or surrounding surfaces. Depending on the albedo of the surroundings and mounting height, the additional energy gain can range from a few to over ten percent without increasing the installation's footprint, directly lowering LCOE over the system's lifetime.
What warranty comes with RenewSys DESERV Extreme 156X panels?
The manufacturer offers a 12-year product warranty covering material and workmanship defects, plus a 30-year linear power output warranty. This ensures predictable, gradually declining performance over three decades, which matters for return-on-investment planning in commercial installations and utility-scale PV farms.
Is it worth choosing 650 Wp modules for a utility-scale PV farm?
The up-to-650 Wp output of the DESERV Extreme 156X series delivers higher power density per unit of roof or ground area, reducing the number of panels required, cabling length, and mounting structure costs. For large industrial and utility-scale installations, this translates into lower BoS (Balance of System) costs per installed kW.
Is RenewSys a tier 1 manufacturer, and where are DESERV Extreme 156X panels made?
RenewSys holds tier 1 manufacturer status, confirming the company's financial stability and experience in large-scale PV module production. Its manufacturing facilities are located in India, where the company runs vertically integrated production from cells to finished modules, enabling tighter quality control at every stage.
Can the junction box and frame of the DESERV Extreme 156X handle harsh weather conditions?
Yes, the modules feature an IP68-rated junction box with bypass diodes, protecting against moisture and cell overheating under partial shading. The sturdy anodized aluminum frame provides mechanical rigidity and resistance to snow and wind loads, making the series suitable for both industrial rooftops and ground-mounted installations.
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