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Hiwatt Solar Brand review

HW-M10/144G-575

575 Wp TOPCon Bifacial
ComparePV verdict

Middle of its segment, weak in heat

Rank 5,945 of 14,005
Compare panels Datasheet PDF
Power (Wp)
575
Typical for its class
Efficiency (%)
22.26
Typical · median 22.44%
Density (Wp/m²)
222.6
Typical · median 224.4
Temp (%/°C)
-0.340
Weak · bottom 5%
Weight (kg)
32.0
Weak · bottom 23%
Warranty (yrs)
25
Weak · bottom 5%

The Hiwatt Solar HW-M10/144G (560-580) series consists of 144-cell modules designed for high power output from a single surface and stable energy production in challenging conditions. They stand out due to the combination of TOPCon N-type technology with a bifacial design, allowing the panel to also utilize reflected light from the ground - a real advantage where the roof or ground "works" with its albedo. This is a good solution for investors who want to maximize output without expanding their installations with additional modules.

From an operational perspective, low sensitivity to LID and LeTID degradation, typical of N-type cells, is important, which translates into more predictable performance in subsequent years. Another advantage is positive power tolerance, which simplifies the design of installations without the risk of "underestimated" parameters compared to specifications. This series is suitable for commercial and industrial installations, PV farms, and large roofs, where power density and profitability per square meter are important.

Ranking

1,018 panels in the segment TOPCon 550-600 W
Metric This panel Median Position in segment Overall rank
Module efficiency 22.26% 22.44% Typical 5,593
Power density 222.6 224.4 Typical 5,549
Temperature coefficient -0.340 -0.290 Weak · bottom 5% 8,778
Weight per kWp 55.7 53.8 Weak · bottom 23% 10,019
Performance warranty 25 yrs 30 yrs Weak · bottom 5% 9,798
Colour key Strong - top 25% Typical - middle 50% Weak - bottom 25%

Signals from the data

4 positive · 6 caution
Best for

Commercial and utility-scale.

Not ideal for

Hot climates, owners who want a long output guarantee and weight-limited structures.

Watch-outs
-0.340 %/°C temperature coefficient

Bottom 5% of the TOPCon 550-600 W segment, against a median of -0.290. Ranked 8,778th in the whole database.

25 year performance warranty

Bottom 5% of the TOPCon 550-600 W segment, against a median of 30 yrs. Ranked 9,798th in the whole database.

55.7 kg per kWp

Bottom 23% of the TOPCon 550-600 W segment, against a median of 53.8.

What owners get
N-type TOPCon technology with low degradation

N-type TOPCon cells feature a temperature coefficient of approx. -0.34%/°C vs. typical -0.36%/°C for PERC, yielding measurably higher output on hot days. Low susceptibility to LID and LeTID degradation ensures more predictable performance over the module's lifetime — critical for LCOE modeling in commercial projects.

Up to 22.45% efficiency — top-tier peer level

The best variant in the series (580 Wp) reaches 22.45% module efficiency, matching the direct peer comparables Emmvee Titanium Duo (22.45%) and ZNShine ZXM7-UHLD144 (22.44%). Even the lowest-efficiency variant (21.68%) stays above the typical threshold for the 560 Wp segment.

Bifacial: 80–85% bifaciality factor

The bifacial TOPCon design achieves a bifaciality factor of 80–85%, compared to the standard ~70% for bifacial PERC modules. In ground-mount and light-colored rooftop installations, this translates to an additional 10–25% rear-side energy yield, lowering effective LCOE without increasing footprint.

Positive power tolerance across all 5 variants

All five variants (560–580 Wp) carry positive-only power tolerance, eliminating the risk of under-performing relative to the nameplate spec. This simplifies MPPT string sizing and reduces the safety margin designers must apply when dimensioning inverters.

Trade-offs
Not BNEF Tier-1 (non-bankable)

Hiwatt Solar does not appear on the BNEF bankable manufacturer list, which in practice excludes or complicates the use of these modules in independently bank-financed projects (typically >1 MW). Tier-1 competitors — Trina Solar, JA Solar, LONGi — impose no such constraint on institutional investors.

12-year product warranty vs. 25 years from market leaders

Hiwatt provides a 12-year product (workmanship) warranty, while Trina Solar and JinkoSolar (Tiger Neo) guarantee 25 years on the product itself. The 13-year gap may be material when calculating total service and replacement costs over a typical project financing horizon of 20–25 years.

Small production scale — supply continuity risk

Hiwatt Solar's annual production capacity is approx. 2.2 GW, while each of the top-5 manufacturers (Jinko, LONGi, JA Solar, Trina, Tongwei) exceeds 80 GW. For utility-scale orders above 5 MW, this may result in longer lead times or difficulty sourcing consistent bin-matched batches with tight electrical parameter variance.

Notes from the database
  • At 22.3% efficiency, this panel is on par with typical TOPCon 550-600W modules
  • Power density of 222.6 W/m² matches the TOPCon 550-600W median
  • Temperature coefficient of -0.34%/°C is 0.05pp worse than TOPCon 550-600W median (-0.29%/°C) - higher losses in summer heat
  • In the top 40% for efficiency among all TOPCon panels

Specifications

Open datasheet PDF
Nominal power (Pmax) 575 Wp Nameplate at 1000 W/m², 25 °C
Module efficiency 22.26 % Typical Segment median 22.44%
Vmpp · Impp 42.44 V · 13.55 A Operating point at max power
Voc · Isc 51.27 V · 14.31 A Sizes the string length
Max system voltage 1500 V Longer strings than 1000 V modules
Dimensions 2278×1134×30 mm · 2.58 m² of roof
Weight 32.0 kg Weak Weak · bottom 23%
Cells 144 · TOPCon Monocrystalline
Coefficient Pmax -0.340 %/°C Weak bottom 5% of its segment
Coefficient Voc · Isc -0.250 · 0.040 %/°C
NOCT 43 °C At 800 W/m², 20 °C ambient
Product warranty 12 years Hardware defects only
Performance warranty 25 years Weak bottom 5% · median 30 yrs
End-of-warranty output 84.8 % Equals 472 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 -0.290
-
Filter these
Size
Panel Power Eff. Temp. Weight Difference
Hiwatt Solar HW-M10/144G-575 575 W 22.26% -0.340 32.0 kg You are here
LR7-60HVH-560M 560 W 24.80% -0.260 25.0 kg Cooler, lighter, +2.5 pp
LR7-60HVH-555M 555 W 24.60% -0.260 25.0 kg Cooler, lighter, +2.3 pp
LR7-60HVHL-550M 550 W 24.40% -0.260 16.3 kg Cooler, 16 kg lighter, +2.1 pp
JAT60S40-540/LR 540 W 24.40% -0.260 23.5 kg Cooler, lighter, +2.1 pp
GK-5-60HG-540M 540 W 24.40% -0.260 23.3 kg Cooler, lighter, +2.1 pp
JKM545-54QL6-DV-F1-EU 545 W 24.27% -0.260 27.5 kg Cooler, +2.0 pp, +5 yr warranty
AIKO-A625-MAH72Dw 625 W 24.20% -0.260 32.5 kg +50 W, cooler, +1.9 pp
HW-M10/144H-530 530 W 20.50% -0.340 28.6 kg -45 W, lighter, -1.8 pp
HW-M10/144H-535 535 W 20.70% -0.340 28.6 kg -40 W, lighter, -1.6 pp
HW-M10/144H-540 540 W 20.90% -0.340 28.6 kg -35 W, lighter, -1.4 pp
HW-M10/144H-545 545 W 21.10% -0.340 28.6 kg -30 W, lighter, -1.2 pp
HW-M10/144H-550 550 W 21.30% -0.340 28.6 kg -25 W, lighter, -1.0 pp
HW-M10/144G-560 560 W 21.68% -0.340 32.0 kg -15 W, -0.6 pp
HW-M10/144G-565 565 W 21.87% -0.340 32.0 kg -10 W, -0.4 pp
HW-M10/144G-570 570 W 22.07% -0.340 32.0 kg Very close match
HW-M10/144G-580 580 W 22.45% -0.340 32.0 kg Very close match
AIKO-A650-MAE72Mw 650 W 25.20% -0.260 27.0 kg +75 W, cooler, +2.9 pp

Found 2326 panels of the same or similar size to this one, within ±10 mm. See them here Found 2368 panels of the same or similar size to this one, within ±25 mm. See them here Found 2382 panels of the same or similar size to this one, within ±50 mm. See them here Found 2547 panels of the same or similar size to this one, within ±100 mm. See them here

Common questions

6 answered
How much extra energy will my system generate thanks to the bifacial design of the Hiwatt Solar HW-M10/144G?
The bifacial construction of the HW-M10/144G captures light reflected off the ground surface — light-colored rooftops, gravel, sand, or snow. In practice, rear-side gain ranges from a few percent up to 25-30% additional output under high-albedo conditions. The effect is most pronounced in ground-mounted utility farms and on bright industrial rooftops where the surface beneath the modules actively reflects solar radiation.
What warranties come with the Hiwatt Solar HW-M10/144G series?
The manufacturer provides a 12-year product warranty covering mechanical integrity and a 25-year linear power output warranty. N-type TOPCon technology ensures low degradation — typically under 1% in year one and around 0.4% per year thereafter — guaranteeing at least 84.8% of rated power is retained after 25 years of operation.
What is TOPCon technology and why does it matter for the HW-M10/144G series?
TOPCon (Tunnel Oxide Passivated Contact) uses an ultra-thin tunnel oxide layer on an N-type cell to minimize charge-carrier recombination. In the HW-M10/144G this results in module efficiency reaching approximately 23.2%, significantly lower LID and LeTID degradation than conventional PERC cells, and better low-light performance. It is currently the leading cell technology in the commercial and utility-scale PV segment.
Are the Hiwatt Solar HW-M10/144G panels suitable for a solar farm or large industrial rooftop?
Yes, the HW-M10/144G series is designed for commercial and utility-scale applications. A peak output of up to 580 Wp per module reduces the total number of modules per project, lowering BoS costs. Strong LID and LeTID resistance combined with positive power tolerance makes this module a reliable choice wherever predictable long-term energy yield is critical.
Does the HW-M10/144G series perform well on overcast days or under high summer temperatures?
Yes. N-type TOPCon cells maintain solid output under diffuse irradiance, so the panel continues generating electricity even on cloudy days. The power temperature coefficient is approximately -0.34%/°C — a more favorable value than typical PERC modules — meaning smaller output losses during hot summer weather when industrial rooftop surface temperatures can exceed 50°C.
Does the Hiwatt Solar HW-M10/144G come with positive power tolerance, and what does that mean for my system?
Yes, HW-M10/144G modules are supplied with positive power tolerance (0/+W), guaranteeing every panel delivers at least its rated peak power — the 580 Wp variant provides a minimum of 580 Wp under STC. For system designers this eliminates the risk of real-world output falling short of design calculations, which is especially important in large-scale PV farms where cumulative negative tolerances have a measurable financial impact.
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