Middle of its segment, weak in heat
The Huayao Hyper N78 series is designed specifically for high energy production in real-world installation conditions - even when the roof space is limited or parts of the modules are periodically shaded. The application of modern N-type cells and half-cut architecture helps reduce losses at connections and improves yield stability over time, resulting in greater investment predictability. Against many standard modules, it stands out due to its focus on low long-term power decay and better performance in weaker sunlight, which is particularly important given Poland's weather conditions. The module construction is geared towards high resistance to loads and micro-cracks, making it well-suited for residential roofs, commercial buildings, and smaller PV farms. The Hyper N78 is a sensible choice for investors seeking to combine high efficiency with durability and minimize the risk of losses from degradation and uneven illumination.
Ranking
Signals from the data
Residential, commercial and shaded-installations.
Hot climates.
Bottom 19% of the TOPCon 600-650 W segment, against a median of -0.290.
N-type TOPCon cells exhibit degradation ≤0.4%/year and are free from boron-oxygen related LID, compared to conventional PERC modules degrading at 0.45-0.55%/year. This translates into measurably higher energy yield in years 10-30 and better stability under low-irradiance conditions typical of Central European climates.
The bifacial module architecture captures reflected irradiance from the ground (albedo). With typical concrete or gravel albedo (20-30%), real-world rear-side energy gain reaches 5-15% over a monofacial equivalent, improving LCOE without additional BoS costs.
Huayao provides a 30-year linear power warranty, exceeding the terms of peer comparables in this power class: Astronergy ASTRO N5 (25 years, ≥84.8% Pnom) and BYD AURO N NLBK-39 (25 years). The extended warranty horizon reduces financial risk for investors in residential and small commercial PV projects.
Maximum module efficiency of 23.25% matches the BYD AURO N NLBK-39 (23.25%) and is marginally below the Astronergy ASTRO N5 (23.3%), within the same 630-650 Wp power class. This power density is sufficient for effective deployment on rooftops with limited available area.
Splitting cells in half reduces resistive (I²R) losses and limits the impact of partial shading - a shaded half-cell string does not suppress output from the other half. Combined with a multi-busbar design, this improves shade tolerance for rooftops with obstructions such as chimneys or skylights.
The Hyper N78 was manufactured only between 2023 and 2024 and is marked as discontinued. This limits availability of new modules for system expansion, complicates warranty replacement of failed units, and raises the risk of reduced long-term technical support from the manufacturer.
Huayao does not appear on BNEF's bankable manufacturer lists (neither Q1 2024 nor Q1 2025). For projects requiring debt or lease financing, the absence of Tier-1 status may complicate loan approval or require additional collateral - unlike peer comparables Jinko Solar, BYD, and Astronergy, all of which hold Tier-1 status.
The product (materials & workmanship) warranty is 15 years, whereas Jinko Solar Tiger Neo 66HL4M-BDX and Astronergy ASTRO N5 both offer 25 years. The gap is material when assessing risk of mechanical failures (frame, laminate, bypass diodes) midway through a typical 20-25 year residential PV financing term.
The Jinko Solar Tiger Neo 66HL4M-BDX achieves 24.06% efficiency in the same power class (up to 650 Wp), surpassing the Hyper N78's peak of 23.25% by approximately 0.8 percentage points. On a 30 m² rooftop, this translates to roughly 240 Wp of additional installed capacity - significant for space-constrained projects.
- Efficiency of 22.9% matches the TOPCon 600-650W median
- At 228.9 W/m² power density, roof space requirements are typical for TOPCon 600-650W panels
- Temperature coefficient of -0.30%/°C matches the TOPCon 600-650W median
- #2574 for efficiency, #6152 for temperature performance out of 14129 panels
Specifications
Datasheet charts
Measured curves published by Huayao in this model's datasheet. A chart carrying a wattage was measured on that variant alone - only the ones that describe 640 Wp appear here. The rest cover the whole series.
Simulations
Degradation from this panel's own datasheet figures. No inverter, soiling or shading losses.
Alternatives
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 1838 panels of the same or similar size to this one, within ±100 mm. See them here
About the Hyper N78 series
These answers cover the whole series. Where a figure differs, the specification above is this module's own.