--- title: "Kingdom KD-M590-144-N 590W Solar Panel - Specs & Review | ComparePV" description: "Kingdom KD-M590-144-N 590W solar panel. Specs: 22.80% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/kingdom-kd-m590-144-n" updated: 2026-09-11 --- # Kingdom KD-M590-144-N Space saver, no clear weak spot 259 panels in the segment N-type 550-600 W ## Identity - **Manufacturer:** Kingdom - **Model:** KD-M590-144-N - **Series:** KDM Series - **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:** Commercial, utility-scale 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 - **Efficiency on par with segment leaders** - Efficiency up to 22.8% matches direct peer comparables (Talesun TM7G72M – 22.8%, Horay Solar Ocean – 22.8%, AE Solar HORIZON – 22.86%), showing the KDM series is technologically competitive with the N-type front-runners despite the manufacturer's non-Tier-1 BNEF status. - **N-type TOPCon with half-cut and SMBB** - The combination of N-type TOPCon cells, half-cut architecture, and multi-busbar (SMBB) design reduces resistive losses and improves power retention under partial shading and elevated roof-surface temperatures, translating into higher and more stable annual energy yield. - **30-year linear power warranty** - The 30-year power warranty places the KDM series in the upper tier of the segment, on par with leading N-type modules in the comparable 570–590 Wp power range, giving investors confidence in long-term energy production for LCOE calculations. - **Self-cleaning coating and silver frame** - The self-cleaning coating reduces soiling-related losses, which is particularly valuable in low-tilt installations, and meaningfully lowers the levelized cost of energy over the full operating lifetime. - **Established global manufacturer presence** - Zhejiang Kingdom Solar has operated since 2010 and supplies KDM modules to over 100 markets, indicating a mature supply chain and operational experience despite lacking BNEF Tier-1 bankable status. ## Cons - **No Tier-1 (BNEF bankable) status** - Kingdom Solar does not appear on the BNEF Tier-1 list (unlike peer comparables such as Talesun or AE Solar), which can complicate bank financing for larger commercial projects where bankability status is a lender requirement. - **12-year product warranty trails market trend** - Against a 30-year power warranty, the 12-year product (materials and workmanship) warranty is shorter than what many current N-type manufacturers now offer (15–25 years), creating a mismatch between the power warranty and the defects warranty. - **Limited production scale versus leaders** - Annual manufacturing capacity of roughly 1 GW is significantly smaller than major Tier-1 players (Jinko, Trina, JA Solar operate tens of GW), which for large orders may mean longer lead times or reduced supply flexibility. ## About this series The Kingdom KDM series is built for installers and investors looking for panels that combine high performance with reliability proven across many markets. The modules use **half-cut cells** and modern **N-type TOPCon** technology, which translates into better power retention under partial shading and higher operating temperatures on roofs or facades. Thanks to the use of multiple busbars (**SMBB**), current inside the cell travels a shorter path, which reduces resistive losses and increases the stability of energy output throughout the panel's service life. **Bifacial** dual-glass versions allow the module to capture light reflected from the ground, which is particularly valuable in ground-mounted installations and flat-roof projects where every extra kilowatt-hour counts. A silver frame and a self-cleaning coating help keep the panel in good condition and reduce losses caused by dirt buildup, which has a real impact on lowering the cost of energy over the full service life (**LCOE**). The KDM series works well in both residential and commercial projects, where the key is a balance between price, longevity, and supply stability from a manufacturer present in more than one hundred markets. ## 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 - Weight of 28.0 kg (1.5 kg below \*\*N-type 550-600W\*\* median of 29.5 kg) allows easier transport and roof mounting - Ranked #2714 out of 14005 panels for efficiency in the database ## Questions ### How does N-type TOPCon technology in Kingdom KDM panels differ from older P-type cells? N-type TOPCon cells have lower annual degradation and handle high temperatures and partial shading better than traditional P-type cells. Thanks to an additional passivation layer, they reduce recombination losses, resulting in higher module efficiency and more stable energy output throughout the panel's lifetime, especially on a heated roof in summer. ### What is the maximum power output of Kingdom KDM series panels? KDM series panels reach a maximum power output of up to 590 Wp. This is a high value for a single module, meaning fewer panels are needed to achieve a given system capacity, resulting in shorter installation time and fewer connections in the system. ### What warranty comes with Kingdom KDM panels? The manufacturer provides a 12-year product warranty and a 30-year linear power output warranty. This means coverage for both material and workmanship defects, as well as a guaranteed level of energy production over three decades, which is important when planning the profitability of a PV investment. ### What does the multi-busbar SMBB technology provide in KDM panels? Using many thin busbars instead of a few wide ones shortens the path current must travel within the cell. This reduces resistive losses, improves heat dissipation, and increases the module's resistance to microcracks, resulting in more stable operation and higher energy yield over the full lifecycle. ### Are Kingdom KDM panels suitable for a residential installation on a sloped roof? Yes, the KDM series works well for both residential installations on sloped roofs and commercial projects. Half-cut cells increase resistance to partial shading from chimneys or antennas, while the silver frame and self-cleaning coating help keep the panel in good condition at a typical roof pitch. ### Is Kingdom a tier 1 manufacturer, and where are KDM panels made? Kingdom is a Chinese manufacturer present in over a hundred markets, but it is not included on the Bloomberg NEF tier 1 list. This doesn't mean lower product quality, but it's worth considering when assessing manufacturer financial risk, for example in the context of long-term warranty and service availability. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/20250731134617_457-847a70b71341.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 | | [Kingdom KD-M570-144-N](https://comparepv.com/panel/kingdom-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/kingdom-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.