Middle of its segment, short guarantee
The KIOTO Solar KPV series is a line of photovoltaic modules manufactured in Austria, characterized by exceptionally strict quality control and a European pedigree. Depending on the model, KPV panels utilize monocrystalline PERC cells, which, thanks to the passivation of the cell's rear surface, achieve higher efficiency under weaker sunlight - making them particularly attractive in the Polish climate. The series includes several product lines, from classic Power and Pure modules, to Smart modules with PERC cells, to specialized design variations, allowing you to choose a panel that suits your specific installation. A key advantage is the anti-PID technology, which protects against degradation caused by electrical potential, as well as precise sorting of cells with a tolerance of 0.1 A, which minimizes losses due to mismatch. Cells laminated with EVA film on both sides provide long-term sealing of the module. The panels also offer hail and salt corrosion resistance, making them suitable for both residential and commercial installations in more challenging atmospheric conditions. The manufacturer guarantees 25-year linear power warranty, which translates into predictable returns on investment throughout the lifespan of the installation.
Ranking
Signals from the data
Residential and commercial.
Owners who want a long output guarantee, weight-limited structures and hot climates.
Bottom 3% of the TOPCon 450-500 W segment, against a median of 30 yrs. Ranked 9,798th in the whole database.
Bottom 6% of the TOPCon 450-500 W segment, against a median of 52.2. Ranked 10,792nd in the whole database.
Bottom 20% of the TOPCon 450-500 W segment, against a median of -0.290.
N-type TOPCon cells deliver a temperature coefficient of Pmpp at -0.30 %/K, outperforming standard PERC cells (-0.35 to -0.38 %/K). In Central European climates where module temperatures regularly exceed 60°C in summer, this advantage translates to a real 1–2% higher annual energy yield compared to previous-generation PERC.
Modules are produced exclusively at the St. Veit an der Glan plant in Carinthia, Austria — the company has operated since 1991, with PV module production since 2005. European origin ensures a shorter supply chain, stable CE certification, and zero exposure to import tariffs affecting Asian manufacturers.
The glass-glass design with 2 mm tempered glass on both sides eliminates EVA yellowing and extends module service life. HW3 certification confirms resistance to 35 mm hailstones at 27 m/s impact speed — a requirement increasingly mandated by property insurers for rooftop and ground-mount PV systems.
The manufacturer guarantees a strictly positive power tolerance (+5 W / 0 W). At a nominal 450 Wp, every module delivers at least the rated power, simplifying system design and eliminating the risk of MPPT string under-loading.
The bifacial module with partial ceramic print on the rear glass captures diffuse reflected irradiance from the ground. In ground-mounted installations (albedo 0.2–0.4), real-world rear-side gains of 5–15% are achievable, lowering the LCOE compared to a monofacial module of equivalent front-side wattage.
KIOTO Solar does not appear on BloombergNEF's bankable manufacturer list (Q1 2026). For large commercial projects seeking non-recourse project finance through banks, the absence of Tier-1 status can block or complicate financing approval — most lender term sheets require Tier-1 or an equivalent bankability rating.
Module efficiency is 22.52%, while comparable peer SunKean/Sunket SKT450M10-108D5 reaches 23.04%. The 0.52 percentage point gap corresponds to approximately 2.3% less power from the same roof area — a meaningful constraint for space-limited residential rooftop installations.
The manufacturer provides a 12-year product (workmanship) warranty, while leading Tier-1 manufacturers (LONGi, Jinko Solar, Trina Solar) standardly offer 15 years. The shorter product warranty window increases exposure to out-of-pocket service costs during years 13–15, when modules are still in peak productive use.
- At 22.5% efficiency, this panel is on par with typical TOPCon 450-500W modules
- Power density of 225.2 W/m² matches the TOPCon 450-500W median
- At -0.30%/°C, hot weather performance is typical for TOPCon 450-500W panels
- At 25.5 kg, this panel is 1.5 kg heavier than the TOPCon 450-500W median (24.0 kg) - more demanding for installation crews
- 70% bifaciality enables rear-side power generation, boosting yield by 4-10% on reflective surfaces
Specifications
Simulations
Degradation from this panel's own datasheet figures. No inverter, soiling or shading losses.
Model: bifaciality × albedo × 0.6 view factor. A first-order estimate, not a yield simulation.
Found 1395 panels of the same or similar size to this one, within ±10 mm. See them here Found 1425 panels of the same or similar size to this one, within ±25 mm. See them here Found 3614 panels of the same or similar size to this one, within ±50 mm. See them here Found 3962 panels of the same or similar size to this one, within ±100 mm. See them here