--- title: "Waaree WSD-400 400W Solar Panel - Specs & Review | ComparePV" description: "Waaree WSD-400 400W solar panel. Specs: 18.40% efficiency, Polycrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/waaree-wsd-400" updated: 2026-09-11 --- # Waaree WSD-400 Middle of its segment, modest efficiency 954 panels in the segment PERC 400-450 W ## Identity - **Manufacturer:** Waaree - **Model:** WSD-400 - **Series:** ADITYA SERIES - **Rated power:** 400 W - **Cell technology:** PERC ## How it compares Compared against segment PERC 400-450 W (954 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 400 W | 410 W | Weak - bottom 9% | | | Module efficiency | 18.40% | 20.60% | Weak - bottom 1% | 13,130 | | Power density | 184.0 | 206.2 | Weak - bottom 1% | 13,114 | | Temperature coefficient | -0.380 | -0.350 | Weak - bottom 2% | 13,397 | | Weight (kg) | 23.5 kg | 22.0 kg | Weak - bottom 16% | | | Performance warranty | 25 yrs | 25 yrs | Typical | 9,798 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 18.40% | 20.60% | Weak - bottom 1% | 13,130 | | Power density | 184.0 | 206.2 | Weak - bottom 1% | 13,114 | | Temperature coefficient | -0.380 | -0.350 | Weak - bottom 2% | 13,397 | | Weight per kWp | 58.8 | 53.0 | Weak - bottom 16% | 11,876 | | Performance warranty | 25 yrs | 25 yrs | Typical | 9,798 | ### Watch out for - **18.40% module efficiency** - Bottom 1% of the PERC 400-450 W segment, against a median of 20.60%. Ranked 13,130th in the whole database. - **184.0 watts per square metre** - Bottom 1% of the PERC 400-450 W segment, against a median of 206.2. Ranked 13,114th in the whole database. - **-0.380 %/°C temperature coefficient** - Bottom 2% of the PERC 400-450 W segment, against a median of -0.350. Ranked 13,397th in the whole database. - **Best for:** Residential and commercial. - **Not ideal for:** Tight roof space, roofs where every square metre has to count and hot climates. ## Specification ### Electrical - **Rated power (Pmax):** 400 W - **Efficiency:** 18.40 % - **Voltage at Pmax (Vmp):** 39.31 V - **Current at Pmax (Imp):** 10.18 A - **Open-circuit voltage (Voc):** 47.02 V - **Short-circuit current (Isc):** 10.75 A - **Max system voltage:** 1500 V ### Temperature - **Temperature coefficient of Pmax:** -0.380 %/degC - **Temperature coefficient of Voc:** -0.360 %/degC - **Temperature coefficient of Isc:** 0.070 %/degC - **NOCT:** 43 degC ### Cell and construction - **Cell type:** Polycrystalline - **Cell technology:** PERC - **Cell count:** 144 ### Physical - **Length:** 2094 mm - **Width:** 1038 mm - **Thickness:** 35 mm - **Weight:** 23.5 kg - **Area:** 2.17 m2 - **Power density:** 184.0 Wp/m2 ### Warranty and degradation - **Product warranty:** 10 years - **Performance warranty:** 25 years - **Output guaranteed at end of warranty:** 80.7 % - **First-year degradation:** 2.50 % - **Annual degradation:** 0.70 % - **Output after 30 years:** 309 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 13130 of 14005 | | Power density | 13114 of 14005 | | Temperature coefficient | 13397 of 14005 | | Weight | 11876 of 14005 | | Warranty | 9798 of 14005 | ## About this series The Waaree ADITYA SERIES is an advanced technological solution designed to maximize energy yields in diverse climatic conditions. These panels use **high-efficiency silicon cells**, which are characterized by an excellent response to diffused light, making them an ideal choice for the Polish market. Thanks to the use of a reinforced frame and low-iron tempered glass, the modules demonstrate **high mechanical resistance** to extreme loads, such as heavy snow or gusty winds. A key differentiator of this series is the **PID-limiting technology**, which directly translates into a longer installation lifespan and slower power degradation over time. The ADITYA SERIES effectively solves the problem of energy losses resulting from high temperatures, offering a **favorable temperature coefficient**, which stabilizes electricity production on hot days. It is a product dedicated to both demanding prosumers and commercial investors looking for a compromise between innovation and solid build quality. They are distinguished from the competition by a **rigorous quality control process**, ensuring the repeatability of the parameters of each module. By choosing this series, the user gains the assurance of failure-free system operation and a high aesthetic finish that goes hand in hand with the modern design of contemporary photovoltaics. ## Notable figures - Efficiency of 18.4% is 2.2pp below the \*\*PERC 400-450W\*\* median (20.6%) - At 184.0 W/m², this panel generates 22.2 W/m² less per unit area than \*\*PERC 400-450W\*\* median (206.2 W/m²) - At -0.38%/°C, loses 0.03pp more power per degree than \*\*PERC 400-450W\*\* median (-0.35%/°C) - At 23.5 kg (1.5 kg above \*\*PERC 400-450W\*\* median of 22.0 kg), requires checking roof load capacity - In the top 94% for efficiency among all PERC panels ## Questions ### Can Waaree ADITYA SERIES panels withstand heavy snow and strong wind loads in Poland? Yes, ADITYA SERIES modules feature a reinforced frame and low-iron tempered glass, allowing them to withstand high mechanical loads — typically up to 5400 Pa for snow and 2400 Pa for wind. These figures significantly exceed average Polish climate conditions, making the panels suitable for both pitched and flat roofs, even in areas with heavy snowfall. ### What is PID mitigation technology in Waaree ADITYA panels and is it actually useful? PID (Potential Induced Degradation) is a gradual power loss caused by voltage potential differences between the cell and frame, worsened by high humidity and temperature. The PID-mitigation technology used in ADITYA SERIES reduces this effect, so the panel loses efficiency more slowly over its lifetime. In practice, this means more stable energy yields throughout the 25-year power warranty period. ### What warranty do Waaree ADITYA SERIES 400 Wp panels come with? The manufacturer provides a 10-year product warranty covering material and workmanship defects, plus a 25-year power output warranty. This means the panel should still deliver the guaranteed performance level specified in the datasheet after 25 years, giving investors a predictable return on investment across a full generation, or even two, of solar system operation. ### Do Waaree ADITYA SERIES panels lose power on hot days? ADITYA SERIES uses PERC cells with a favorable temperature coefficient, which limits power loss at high module operating temperatures. As a result, the panels maintain more stable current output on hot, sunny days compared to older cell technologies — an important factor for roof installations with poor ventilation, where modules tend to heat up more. ### Is Waaree ADITYA SERIES a bifacial panel? No, ADITYA SERIES is a mono-facial panel line built with high-efficiency PERC silicon cells rated up to 400 Wp. If you're looking for additional energy yield from reflected light on the rear side of the module, consider a different bifacial series from Waaree — this line instead focuses on maximizing efficiency and durability in a standard single-sided design. ### Is Waaree a reputable solar panel manufacturer, and where is it based? Waaree is an India-based Tier 1 manufacturer, meaning it operates its own production lines, maintains stable financials, and is regularly audited for project bankability. The ADITYA SERIES undergoes strict quality control at every production stage, ensuring consistent module parameters — an important factor for larger installations where uniform panel performance matters. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/wsd-385-405-ae780f26eb-compressed-dd3efdf818b2.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [Goldi Solar GS10-B120-GF-450](https://comparepv.com/panel/goldi-solar-gs10-b120-gf-450) | 450 W | +50 W, cooler, +2.4 pp | | [Goldi Solar GS10-B120-GF-445](https://comparepv.com/panel/goldi-solar-gs10-b120-gf-445) | 445 W | +45 W, cooler, +2.2 pp | | [Goldi Solar GS10-B120-GF-440](https://comparepv.com/panel/goldi-solar-gs10-b120-gf-440) | 440 W | +40 W, cooler, +1.9 pp | | [SunLink LNSU-410M](https://comparepv.com/panel/sunlink-lnsu-410m) | 410 W | +10 W, cooler, +1.9 pp | | [Goldi Solar GS10-B120-GF-435](https://comparepv.com/panel/goldi-solar-gs10-b120-gf-435) | 435 W | +35 W, cooler, +1.7 pp | | [SunLink LNSU-405M](https://comparepv.com/panel/sunlink-lnsu-405m) | 405 W | Cooler, heavier, +1.7 pp | | [Canadian Solar CS3U-395P](https://comparepv.com/panel/canadian-solar-cs3u-395p) | 395 W | Cooler, lighter, +1.5 pp | | [SunLink LNSU-400M](https://comparepv.com/panel/sunlink-lnsu-400m) | 400 W | Cooler, heavier, +1.4 pp | | [Sunlike Solar LNSF-400M](https://comparepv.com/panel/sunlike-solar-lnsf-400m) | 400 W | Cooler, +1.4 pp | | [Waaree WSD-385](https://comparepv.com/panel/waaree-wsd-385) | 385 W | -15 W, -0.7 pp | | [Waaree WSD-390](https://comparepv.com/panel/waaree-wsd-390) | 390 W | -10 W, -0.5 pp | | [Waaree WSD-395](https://comparepv.com/panel/waaree-wsd-395) | 395 W | -0.2 pp | | [Waaree WSMD-420](https://comparepv.com/panel/waaree-wsmd-420) | 420 W | +20 W, +0.9 pp, +2 yr warranty | | [Waaree Bi-33-425](https://comparepv.com/panel/waaree-bi-33-425) | 425 W | +25 W, +1.2 pp, +2 yr warranty | | [Gamko New Energy GKA120N-PRO-590W](https://comparepv.com/panel/gamko-new-energy-gka120n-pro-590w) | 590 W | +190 W, cooler, +5.4 pp | | [Gamko New Energy GKA120N-PRO-585W](https://comparepv.com/panel/gamko-new-energy-gka120n-pro-585w) | 585 W | +185 W, cooler, +5.2 pp | --- Source: https://comparepv.com/panel/waaree-wsd-400 Not in this file, on the page: a thirty-year output simulator and alternatives filtered by how closely they match these dimensions.