Strong in heat, needs the roof space
The Hiwatt Solar HW-M372H(380-400) series consists of monocrystalline modules using the N-type half-cell technology, designed for high energy production even in real operating conditions. Thanks to its refined electrical architecture and operation at lower currents, the modules help minimize losses and the risk of localized overheating, resulting in more stable performance over time. In practice, this means fewer problems in installations exposed to partial shading, dirt, or uneven conditions on rooftops.
A notable feature is the enhanced resistance to PID, achieved through control of the production process and materials - this is important for investors who want to maintain performance parameters over longer distances without noticeable drops at the start. The series also offers a favorable temperature coefficient, meaning it performs better in hot weather when many panels noticeably lose efficiency.
The HW-M372H(380-400) series is suitable for homes, businesses, and prosumer installations, where low energy costs over the lifetime and long-term reliability are important.
Ranking
Signals from the data
Residential, commercial, shaded-installations and hot-climate.
Roofs where every square metre has to count and tight roof space.
Top 15% of the PERC 350-400 W segment, against a median of -0.350.
Bottom 23% of the PERC 350-400 W segment, against a median of 199.0.
Bottom 23% of the PERC 350-400 W segment, against a median of 19.90%.
Splitting cells reduces series resistance and hot-spot losses. In practice this means better performance under partial shading and soiling — common issues in rooftop installations — compared with full-cell PERC modules in the same power class.
Peak module efficiency of 20.3% clearly outperforms the directly comparable MWG Mono peer (19.32%), placing the series in the upper quartile of the 380–400 Wp segment. On roof space-constrained systems, fewer modules are needed to reach target system power.
The manufacturer guarantees resistance to Potential Induced Degradation through tightly controlled production processes and materials. This is critical for grounded or high system-voltage installations where PID can silently erode string output over years.
A Pmax temperature coefficient of -0.34%/°C beats the typical PERC benchmark (~-0.37%/°C). At a module temperature of 70°C — common in summer peak-production hours — this translates to approximately 0.7 percentage points higher yield than thermally inferior PERC counterparts.
Five distinct power configurations allow precise string matching without heavily detuned BoS configurations. The series remains in active production, simplifying module replacement during servicing over a multi-decade system lifetime.
Hiwatt Solar does not appear on the BNEF bankable Tier-1 module manufacturer list (Q1 2026). Standard bankability criteria require at least six >10 MW projects financed by independent commercial lenders — absence of this status increases due-diligence requirements and can disqualify the series from projects requiring manufacturer financial guarantees.
The workmanship warranty stands at 12 years, while current-generation N-type TOPCon modules from Tier-1 manufacturers (Jinko Tiger Neo, JA Deep Blue, Trina Vertex S+) carry 25-year product warranties with an 87.4%/25-year power floor versus 84.8% here. The 2.6 pp power retention gap on a 10 kWp system equals roughly 260 Wp of permanent lost capacity.
PERC (P-type) fell to approximately 12% of global new module production share in 2025, while N-type TOPCon exceeded 80% (InfoLink, 2025). Growing TOPCon/HJT dominance means that component availability, service support, and installer familiarity with PERC will systematically shrink across the 15–25-year operational horizon of a typical PV system.
- Efficiency of 19.3% matches the PERC 0-400W median
- At 192.8 W/m² power density, roof space requirements are typical for PERC 0-400W panels
- At -0.34%/°C, hot weather performance is typical for PERC 0-400W panels
- At 21.5 kg, weight matches the PERC 0-400W median
- In the top 91% for efficiency among all PERC panels
Specifications
Simulations
Degradation from this panel's own datasheet figures. No inverter, soiling or shading losses.
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