--- title: "KDM Kingdom Solar KD-M590-144-N 590W Solar Panel - Specs & Review | ComparePV" description: "KDM Kingdom Solar KD-M590-144-N 590W solar panel. Specs: 22.80% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/kdm-kingdom-solar-kd-m590-144-n" updated: 2026-09-11 --- # KDM Kingdom Solar KD-M590-144-N Space saver, no clear weak spot 259 panels in the segment N-type 550-600 W ## Identity - **Manufacturer:** KDM Kingdom Solar - **Model:** KD-M590-144-N - **Series:** KDM N-type 144-cell - **Rated power:** 590 W - **Cell technology:** N-type ## How it compares Compared against segment N-type 550-600 W (259 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 590 W | 580 W | Strong - top 15% | | | Module efficiency | 22.80% | 22.45% | Strong - top 20% | 2,714 | | Power density | 228.5 | 224.5 | Strong - top 12% | 2,596 | | Temperature coefficient | -0.290 | -0.290 | Typical | 2,165 | | Weight (kg) | 28.0 kg | 29.5 kg | Typical | | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 22.80% | 22.45% | Strong - top 20% | 2,714 | | Power density | 228.5 | 224.5 | Strong - top 12% | 2,596 | | Temperature coefficient | -0.290 | -0.290 | Typical | 2,165 | | Weight per kWp | 47.5 | 52.3 | Typical | 1,689 | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Strengths - **228.5 watts per square metre** - Top 12% of the N-type 550-600 W segment, against a median of 224.5. - **22.80% module efficiency** - Top 20% of the N-type 550-600 W segment, against a median of 22.45%. - **Best for:** Utility-scale, commercial, hot-climate and shaded-installations. ## Specification ### Electrical - **Rated power (Pmax):** 590 W - **Efficiency:** 22.80 % - **Voltage at Pmax (Vmp):** 43.71 V - **Current at Pmax (Imp):** 13.50 A - **Open-circuit voltage (Voc):** 52.01 V - **Short-circuit current (Isc):** 14.48 A - **Max system voltage:** 1500 V ### Temperature - **Temperature coefficient of Pmax:** -0.290 %/degC - **Temperature coefficient of Voc:** -0.250 %/degC - **Temperature coefficient of Isc:** 0.045 %/degC - **NOCT:** 45 degC ### Cell and construction - **Cell type:** Monocrystalline - **Cell technology:** N-type - **Cell count:** 144 ### Physical - **Length:** 2279 mm - **Width:** 1133 mm - **Thickness:** 35 mm - **Weight:** 28.0 kg - **Area:** 2.58 m2 - **Power density:** 228.5 Wp/m2 ### Warranty and degradation - **Product warranty:** 12 years - **Performance warranty:** 30 years - **Output guaranteed at end of warranty:** 86.4 % - **First-year degradation:** 2.00 % - **Annual degradation:** 0.40 % - **Output after 30 years:** 510 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 2714 of 14005 | | Power density | 2596 of 14005 | | Temperature coefficient | 2165 of 14005 | | Weight | 1689 of 14005 | | Warranty | 21 of 14005 | ## Pros - **TOPCon N-type cell technology** - N-type TOPCon cells deliver a temperature coefficient of approximately -0.29%/°C versus -0.35%/°C for PERC, translating to roughly 3.5% higher output at a typical module temperature of 70°C. First-year LID degradation stays below 0.5%, compared to 1.5–2.5% for standard PERC cells. - **22.8% efficiency at the segment frontier** - At 590 Wp and 22.8% module efficiency, the panel matches its closest peers — Horay HS 182-144 TC-D Ocean (22.8%) and Talesun TM7G72M (22.8%) — and trails AE Solar HORIZON CMD-144BDS by only 0.06 percentage points (22.86%). For utility-scale ground-mount projects, this reduces required land area by approximately 8–10% versus legacy PERC modules at ~21% efficiency. - **30-year linear power warranty** - KDM guarantees linear power output over 30 years with annual degradation not exceeding 0.4%, retaining >88% of nameplate power at end of life. Many Tier-2 manufacturers and select Tier-1 brands (e.g., Talesun) cap at 25-year warranties with a ~84.8% floor — KDM extends warranty coverage by a full five years. - **144 half-cut cell architecture** - Splitting each cell in half halves the current per string, reducing resistive (I²R) losses and improving partial-shading tolerance. In commercial rooftop and ground-mount systems with obstructions, this configuration typically yields 2–4% higher annual energy output versus full-cell modules at the same nameplate wattage. ## Cons - **Series discontinued — supply risk** - The KDM N-type 144-cell series carries a discontinued status, meaning production has ended and no replenishment stock will be manufactured. This prevents future capacity expansions using identical modules and severely complicates in-warranty replacement logistics — a critical risk factor for projects with a 30-year investment horizon. - **Not BNEF Tier-1 / bankable** - Zhejiang Kingdom Solar Energy Technic Co., Ltd. (est. 2010) does not appear on BloombergNEF's Tier 1 module manufacturer list as of Q1 2026. For projects seeking non-recourse bank financing, the absence of bankable status is typically a hard disqualifier and forces either higher credit insurance premiums or a switch to a Tier-1 supplier. - **Monofacial module vs. bifacial peers** - Direct peer Horay HS 182-144 TC-D Ocean achieves the same 22.8% front-side efficiency and 590 Wp in a bifacial configuration, capturing an additional 10–25% bifacial gain typical of ground-mount installations. The KDM N-type 144-cell is strictly monofacial, forgoing rear-side generation with no compensating price advantage or technical differentiation. - **12-year product warranty — below segment standard** - The product warranty covering manufacturing defects, delamination, and cell cracking extends only 12 years, whereas Jinko Solar, LONGi, and Canadian Solar provide 15-year product warranties on comparable 590 Wp TOPCon modules. The missing three years span the highest-risk window for latent defects, leaving the owner exposed to full module replacement costs from year 13 onward. ## About this series KDM N-type 144-cell panels bring a new level of quality to utility-scale installations, utilizing advanced N-type cell architecture that almost completely eliminates light-induced degradation. Thanks to the design based on 144 half-cut cells, these modules offer significantly higher efficiency compared to traditional P-type panels, which translates into more energy harvested from every square meter of surface area. A key innovation is the **use of TOPCon technology**, which allows for significantly better results in low-light conditions as well as during morning and evening hours. This series effectively solves the problem of component overheating, as the **low temperature coefficient** guarantees stable operation and high yields even during record summer heatwaves. This solution is dedicated primarily to investors building ground-mounted farms and large rooftop installations, where the priority is maximum durability and a fast return on investment. What distinguishes these modules from competing products is their **exceptional resistance to PID and LeTID effects**, which, combined with a reinforced frame, ensures full mechanical safety in extreme weather conditions. By choosing **high-efficiency N-type cells**, the user can be sure that the system will maintain its original parameters for decades, minimizing operating costs. This is a solid foundation for professional energy projects, focusing on uncompromising expertise and performance. ## Notable figures - Efficiency of 22.8% matches the \*\*N-type 550-600W\*\* median - 228.5 W/m² power density - 4.0 W/m² more than \*\*N-type 550-600W\*\* median (224.5 W/m²), more power per roof area - At -0.29%/°C, hot weather performance is typical for \*\*N-type 550-600W\*\* panels - 28.0 kg weight - 1.5 kg lighter than \*\*N-type 550-600W\*\* median (29.5 kg), reducing installation effort - Ranked #2714 out of 14005 panels for efficiency in the database ## Questions ### What warranty does the KDM N-type 144-cell series come with and what does it cover? KDM Kingdom Solar provides a 12-year product warranty on the N-type 144-cell series, covering material and manufacturing defects. A separate 30-year linear power output warranty guarantees that the modules retain a specified performance level for three decades. The extended power warranty is a key factor when calculating LCOE for utility-scale ground-mount systems and large commercial rooftop installations. ### What is TOPCon technology and why is it used in the KDM N-type 144-cell series? TOPCon (Tunnel Oxide Passivated Contact) is an advanced N-type cell architecture in which a thin tunnel oxide layer minimizes carrier recombination at the rear contact. In the KDM N-type 144-cell series this translates into higher efficiency than conventional PERC cells, better low-light performance under overcast skies and during morning or evening hours, and a low temperature coefficient that reduces power losses on hot summer days. ### Do KDM N-type 144-cell panels perform well in summer when rooftop temperatures exceed 50°C? Yes. The N-type TOPCon cells used in this series feature a low temperature coefficient (typically around -0.29%/°C), meaning they lose less power at elevated temperatures compared to P-type or PERC modules. Even when the module heats up to 70°C, the KDM N-type 144-cell series experiences significantly smaller power derating, which has a direct positive impact on annual energy yield. ### How does the KDM N-type 144-cell series compare to P-type panels, and is the premium worth it? The main advantages of N-type over P-type are: near-zero light-induced degradation (LID), strong resistance to PID and LeTID effects, higher cell efficiency, and better performance under diffuse irradiance. P-type PERC panels can lose 1–3% of rated power in the first months due to LID, which N-type cells inherently avoid. With up to 590 Wp and a 30-year power warranty, the N-type premium pays off faster on large systems where long-term yield stability directly affects project ROI. ### What types of installations are KDM N-type 144-cell modules at 590 Wp best suited for? The series is primarily designed for utility-scale ground-mount PV farms and large commercial or industrial rooftop systems. The 590 Wp output combined with the 144 half-cut cell format reduces the total module count per project, lowering BoS costs and installation labor. The reinforced frame provides the mechanical strength required for ground-mount racking structures exposed to high wind loads and snow accumulation. ### Is the KDM N-type 144-cell series still available for purchase? No. The KDM N-type 144-cell series has been discontinued and is no longer offered by KDM Kingdom Solar as an active product line. Availability through distributors may be limited to existing inventory only. For new installations or replacement projects, consider current-generation N-type TOPCon series from this or alternative manufacturers that offer full technical support and guaranteed supply. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/20250731134617_457-290ed55f2d77.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [Longi Solar LR7-60HVH-560M](https://comparepv.com/panel/longi-lr7-60hvh-560m) | 560 W | -30 W, lighter, +2.0 pp | | [AIKO AIKO-A640-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a640-mae72mw) | 640 W | +50 W, cooler, +2.0 pp | | [Longi Solar LR7-60HVH-555M](https://comparepv.com/panel/longi-lr7-60hvh-555m) | 555 W | -35 W, lighter, +1.8 pp | | [AIKO AIKO-A635-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a635-mae72mw) | 635 W | +45 W, cooler, +1.8 pp | | [AIKO AIKO-A630-MAH72Dw](https://comparepv.com/panel/aiko-aiko-a630-mah72dw) | 630 W | +40 W, heavier, +1.6 pp | | [Longi Solar LR7-60HVHL-550M](https://comparepv.com/panel/longi-lr7-60hvhl-550m) | 550 W | -40 W, lighter, +1.6 pp | | [KDM Kingdom Solar KD-M570-144-N](https://comparepv.com/panel/kdm-kingdom-solar-kd-m570-144-n) | 570 W | -20 W, -0.7 pp | | [AIKO AIKO-A650-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a650-mae72mw) | 650 W | +60 W, cooler, +2.4 pp | | [AIKO AIKO-A645-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a645-mae72mw) | 645 W | +55 W, cooler, +2.2 pp | --- Source: https://comparepv.com/panel/kdm-kingdom-solar-kd-m590-144-n Not in this file, on the page: the I-V and temperature curves lifted from the manufacturer's datasheet, a thirty-year output simulator and alternatives filtered by how closely they match these dimensions.