--- title: "KB Solar KBS-375 375W Solar Panel - Specs & Review | ComparePV" description: "KB Solar KBS-375 375W solar panel. Specs: 20.30% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/kb-solar-kbs-375" updated: 2026-09-11 --- # KB Solar KBS-375 Strong in heat, no clear weak spot 579 panels in the segment PERC 350-400 W ## Identity - **Manufacturer:** KB Solar - **Model:** KBS-375 - **Series:** KBS-MONO-BF - **Rated power:** 375 W - **Cell technology:** PERC - **Bifacial:** yes ## How it compares Compared against segment PERC 350-400 W (579 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 375 W | 380 W | Typical | | | Module efficiency | 20.30% | 19.90% | Strong - top 16% | 11,769 | | Power density | 203.3 | 199.0 | Strong - top 13% | 11,717 | | Temperature coefficient | -0.330 | -0.350 | Strong - top 6% | 8,545 | | Weight (kg) | 20.0 kg | 21.4 kg | Typical | | | Performance warranty | 30 yrs | 25 yrs | Strong - top 13% | 21 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 20.30% | 19.90% | Strong - top 16% | 11,769 | | Power density | 203.3 | 199.0 | Strong - top 13% | 11,717 | | Temperature coefficient | -0.330 | -0.350 | Strong - top 6% | 8,545 | | Weight per kWp | 53.4 | 55.8 | Typical | 7,365 | | Performance warranty | 30 yrs | 25 yrs | Strong - top 13% | 21 | ### Strengths - **-0.330 %/°C temperature coefficient** - Top 6% of the PERC 350-400 W segment, against a median of -0.350. Ranked 8,545th in the whole database. - **30 year performance warranty** - Top 13% of the PERC 350-400 W segment, against a median of 25 yrs. - **203.3 watts per square metre** - Top 13% of the PERC 350-400 W segment, against a median of 199.0. - **Best for:** Commercial, utility-scale, shaded-installations and hot-climate. ## Specification ### Electrical - **Rated power (Pmax):** 375 W - **Efficiency:** 20.30 % - **Voltage at Pmax (Vmp):** 33.96 V - **Current at Pmax (Imp):** 11.06 A - **Open-circuit voltage (Voc):** 40.75 V - **Short-circuit current (Isc):** 11.62 A - **Max system voltage:** 1500 V ### Temperature - **Temperature coefficient of Pmax:** -0.330 %/degC - **Temperature coefficient of Voc:** -0.260 %/degC - **Temperature coefficient of Isc:** 0.037 %/degC - **NOCT:** 45 degC ### Cell and construction - **Cell type:** Monocrystalline - **Cell technology:** PERC - **Cell count:** 120 - **Bifacial:** yes - **Bifacial gain:** 30.00 ### Physical - **Length:** 1760 mm - **Width:** 1048 mm - **Thickness:** 35 mm - **Weight:** 20.0 kg - **Area:** 1.84 m2 - **Power density:** 203.3 Wp/m2 ### Warranty and degradation - **Product warranty:** 12 years - **Performance warranty:** 30 years ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 11769 of 14005 | | Power density | 11717 of 14005 | | Temperature coefficient | 8545 of 14005 | | Weight | 7365 of 14005 | | Warranty | 21 of 14005 | ## Pros - **Bifacial technology – up to 30% rear-side gain** - Modules capture irradiance from both cell surfaces. Per KB Solar KBS-MONO-BF series data, the rear side can deliver up to 30% additional energy yield compared to monofacial modules, with the greatest benefit in ground-mount systems and high-albedo environments (white gravel, concrete, snow cover). - **Up to 20.9% efficiency – highest among peer comparables** - The maximum module efficiency of 20.9% places the series above all direct peer comparables: MY Solar M2 (19.84%), JA Solar JAM60D20 (20.6%), and Solarwatt Panel vision GM 3.0 pure (20.7%). On the same roof area, the KBS-MONO-BF series will generate more kWh than any of the compared products. - **Half-cut + 12BB: lower losses, shading tolerance** - The half-cut cell architecture splits each cell into two independent halves, reducing operating current and resistive (I²R) losses. The 12-busbar (12BB) configuration lowers series resistance and limits hotspot risk under partial shading — as documented in the KBS-MONO-BF technical datasheet. - **30-year linear power output warranty** - The manufacturer provides a 30-year linear power output warranty, exceeding the mid-range industry standard of 25 years. The product (workmanship) warranty stands at 12 years — identical to JA Solar JAM60D20 (12 years) and compliant with IEC norms. ## Cons - **Not on BNEF Tier-1 bankable list (Q1 2026)** - KB Solar does not appear on the BloombergNEF bankable manufacturer list as of Q1 2026, which complicates or prevents non-recourse bank financing for utility-scale and commercial PV projects, and increases due diligence requirements from insurers. Peer comparable JA Solar holds Tier-1 status with documented supply to over 100 countries. - **P-type PERC – higher degradation than N-type** - P-type PERC technology exhibits annual degradation of ~0.45–0.50%/yr and first-year LID (Light-Induced Degradation) of 1.5–2.0%. Competing N-type TOPCon degrades at ~0.35–0.40%/yr and HJT at ~0.25–0.30%/yr. Over a 30-year project life, the degradation gap between PERC and TOPCon translates to approximately 3–4% lower cumulative energy yield. In 2025–2026, leading manufacturers (Jinko Solar, LONGi, Trina Solar, JA Solar) are transitioning en masse to N-type cells. ## About this series KB Solar KBS-MONO-BF series photovoltaic panels represent an advanced solution for investors focusing on maximum energy efficiency and durability. A key differentiator of this line is the **bifacial technology (double-sided)**, which enables light absorption not only directly from the sun, but also reflected from the ground. This solution drastically increases yields, especially in ground-mounted installations or on bright roof surfaces. The use of high-efficiency **monocrystalline PERC cells** combined with a Half-Cut design ensures these modules perform exceptionally well in partial shading conditions, minimizing power losses and reducing the risk of hot-spot formation. The KBS-MONO-BF series is designed for decades of operation, as confirmed by a **30-year power output warranty** and high resistance to extreme weather events, such as strong winds or snow loads. Thanks to an excellent temperature coefficient, the panels maintain high efficiency even on hot days, which directly translates into a **low levelized cost of energy (LCOE)** throughout the system-s life cycle. This is an optimal choice for modern photovoltaic farms and demanding commercial installations, where reliability and the fastest return on investment matter. A robust frame and reinforced tempered glass guarantee safe installation and stable operation in the Polish climate. ## Notable figures - Efficiency of 20.3% is 0.9pp above the \*\*PERC 0-400W\*\* median (19.4%) - At 203.3 W/m² power density, this panel generates 8.9 W/m² more per unit area than \*\*PERC 0-400W\*\* median (194.4 W/m²) - At -0.33%/°C (vs median -0.36%/°C), loses ~1% less power in hot conditions - 70% bifaciality enables rear-side power generation, boosting yield by 4-10% on reflective surfaces - In the top 84% for efficiency among all PERC panels ## Questions ### How much extra yield can I get from the bifacial technology in KB Solar KBS-MONO-BF panels? The bifacial design of the KBS-MONO-BF series lets the rear side of each module capture light reflected from the ground or rooftop surface, typically boosting energy yield by 5–15% compared to conventional single-sided panels. The biggest gains come in ground-mounted systems or installations on light-colored surfaces where albedo reflection is high. With a rated power of 385 Wp, the bifacial gain can meaningfully shorten the payback period without adding more modules. ### What warranty does the KB Solar KBS-MONO-BF series carry and what does it cover? The KBS-MONO-BF series comes with a 12-year product warranty covering manufacturing defects and material failures. In addition, a separate 30-year power output warranty guarantees the modules will retain a specified percentage of their 385 Wp nominal performance over that period. The 30-year linear power guarantee is among the longest available on the market and is a key input when calculating the LCOE over the full system lifetime. ### How well do KBS-MONO-BF panels handle partial shading from a chimney or dormer? Very well. The half-cut PERC cell architecture splits each module into two independent electrical strings, so shading on one half does not shut down the entire panel. This design minimizes hot-spot formation and significantly reduces power losses. It is especially valuable on pitched rooftops with chimneys, dormers, or nearby trees, where conventional full-cell modules can suffer much steeper output drops under the same shading conditions. ### Is the KB Solar KBS-MONO-BF series suitable for ground-mounted utility-scale PV farms? Yes — the KBS-MONO-BF series is specifically engineered for utility-scale and large commercial ground-mounted systems. The bifacial technology fully leverages the albedo effect from grass, sand, or gravel beneath the array. The reinforced tempered glass and robust aluminum frame provide high resistance to wind loads and snow pressure, while the 30-year power warranty supports project bankability and underpins long-term yield forecasts. ### KB Solar is not a Tier 1 manufacturer — should that concern me when buying KBS-MONO-BF panels? Tier 1 rankings, such as the Bloomberg NEF list, primarily assess a manufacturer's financial creditworthiness and access to project financing — not module quality directly. KB Solar is not currently listed as Tier 1, which may matter if you are seeking bank financing or a lease product for your project. For product reliability, focus on IEC and TÜV certifications and the brand's service track record, which are more direct indicators of real-world panel performance. ### How do high summer temperatures affect the output of KB Solar KBS-MONO-BF panels? All PV modules lose some power in high heat, but the PERC cells used in the KBS-MONO-BF series have a better temperature coefficient for Pmax than older polycrystalline technology, meaning smaller real-world power losses on hot summer days. Mounting practice also matters: leaving adequate clearance beneath the modules improves airflow, keeps the operating temperature lower, and sustains higher actual efficiency throughout the summer months. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/module-kbs-375-mono-bf-1-819543020dc2.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [JA Solar NS-330MH-80](https://comparepv.com/panel/ja-solar-ns-330mh-80) | 330 W | Lighter, +2.8 pp, -5 yr warranty | | [PolyCrown Solar Tech NS-330MH-80](https://comparepv.com/panel/polycrown-solar-tech-ns-330mh-80) | 330 W | Lighter, +2.8 pp, -5 yr warranty | | [Gamko New Energy GKA210M340W](https://comparepv.com/panel/gamko-new-energy-gka210m340w) | 340 W | -35 W, lighter, +2.7 pp | | [Gamko New Energy GKA210M360W](https://comparepv.com/panel/gamko-new-energy-gka210m360w) | 360 W | -15 W, lighter, +2.7 pp | | [Gamko New Energy GKA210M380W (1/4\*4\*38)](https://comparepv.com/panel/gamko-new-energy-gka210m380w-1-4-4-38) | 380 W | Lighter, +2.7 pp | | [Gamko New Energy GKA210M400W (1/2\*4\*20)](https://comparepv.com/panel/gamko-new-energy-gka210m400w-1-2-4-20) | 400 W | +25 W, lighter, +2.7 pp | | [Gamko New Energy GKA210M400W (1/4\*4\*40)](https://comparepv.com/panel/gamko-new-energy-gka210m400w-1-4-4-40) | 400 W | +25 W, lighter, +2.7 pp | | [Gamko New Energy GKA210M380W (1/2\*4\*19)](https://comparepv.com/panel/gamko-new-energy-gka210m380w-1-2-4-19) | 380 W | Lighter, +2.7 pp | | [Maxeon SPR-MAX3-400-COM](https://comparepv.com/panel/maxeon-spr-max3-400-com) | 400 W | Cooler, +2.3 pp, +10 yr warranty | | [Maxeon SPR-MAX3-425-R](https://comparepv.com/panel/maxeon-spr-max3-425-r) | 425 W | Cooler, +2.1 pp, +10 yr warranty | | [KB Solar KBS-365](https://comparepv.com/panel/kb-solar-kbs-365) | 365 W | -10 W, -0.3 pp | | [KB Solar KBS-370](https://comparepv.com/panel/kb-solar-kbs-370) | 370 W | Very close match | | [KB Solar KBS-380](https://comparepv.com/panel/kb-solar-kbs-380) | 380 W | +0.3 pp | | [KB Solar KBS-385](https://comparepv.com/panel/kb-solar-kbs-385) | 385 W | +10 W, +0.6 pp | | [Longi Solar LR7-54HJD-510M](https://comparepv.com/panel/longi-lr7-54hjd-510m) | 510 W | +135 W, cooler, +4.7 pp | | [AIKO AIKO-A495-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a495-mce54mw) | 495 W | +120 W, cooler, +4.5 pp | --- Source: https://comparepv.com/panel/kb-solar-kbs-375 Not in this file, on the page: a thirty-year output simulator, a bifacial gain calculator and alternatives filtered by how closely they match these dimensions.