--- title: "Waaree WSMD-540 vs Waaree WSMD-650 - Solar Panel Comparison | ComparePV" description: "Compare Waaree WSMD-540 vs Waaree WSMD-650 side by side: what actually differs, output when it is hot, thirty-year production, and the full specification." source: "https://comparepv.com/compare/waaree-wsmd-540/waaree-wsmd-650" updated: 2026-09-11 --- # Waaree WSMD-540 vs Waaree WSMD-650 11 differences, and they point both ways The largest is rated power: 110 W more power. 8 of 19 comparable parameters are identical. ## The two panels | Attribute | A | B | | --- | --- | --- | | Panel | [Waaree WSMD-540](https://comparepv.com/panel/waaree-wsmd-540) | [Waaree WSMD-650](https://comparepv.com/panel/waaree-wsmd-650) | | Manufacturer | Waaree | Waaree | | Power | 540 Wp | 650 Wp | | Efficiency | 20.98 % | 20.82 % | | Technology | PERC | PERC | ## Where they differ Ranked by how much the difference matters, not by datasheet order. | Parameter | 540 | 650 | Difference | | --- | --- | --- | --- | | Rated power | 540 Wp | 650 Wp | +110 W for 650 | | Weight | 27.5 kg | 34.5 kg | -7.0 kg for 540 | | Short-circuit current | 13.83 A | 17.84 A | 4.01 A apart | | Module area | 2.574 m² | 3.125 m² | 0.551 m² apart | | Open-circuit voltage | 49.61 V | 46.09 V | 3.52 V apart | | Temperature coefficient | -0.350 %/°C | -0.340 %/°C | +0.010 %/°C for 650 | | Current at max power | 12.95 A | 17.16 A | 4.21 A apart | | Cell count | 144 | 132 | 12 cells apart | | Voltage at max power | 41.75 V | 37.91 V | 3.84 V apart | | Weight per kWp | 50.9 kg/kWp | 53.1 kg/kWp | -2.2 kg/kWp for 540 | | Dimensions | 2272x1133x35 mm | 2400x1302x35 mm | 2272x1133x35 mm vs 2400x1302x35 mm | ## Every compared parameter | Parameter | 540 | 650 | | --- | --- | --- | | Rated power | 540 Wp | 650 Wp | | Module efficiency | 20.98 % | 20.82 % | | Power density | 209.8 Wp/m² | 208.0 Wp/m² | | Open-circuit voltage | 49.61 V | 46.09 V | | Voltage at max power | 41.75 V | 37.91 V | | Short-circuit current | 13.83 A | 17.84 A | | Current at max power | 12.95 A | 17.16 A | | Temperature coefficient | -0.350 %/°C | -0.340 %/°C | | Dimensions | 2272x1133x35 mm | 2400x1302x35 mm | | Module area | 2.574 m² | 3.125 m² | | Weight | 27.5 kg | 34.5 kg | | Weight per kWp | 50.9 kg/kWp | 53.1 kg/kWp | | Product warranty | 12 yrs | 12 yrs | | Performance warranty | 27 yrs | 27 yrs | | Annual degradation | 0.55 %/yr | 0.55 %/yr | | Cell technology | PERC | PERC | | Cell type | Monocrystalline | Monocrystalline | | Cell count | 144 | 132 | | Bifacial | No | No | ## Thirty-year yield Each panel's own declared degradation curve, at 1,200 kWh/kWp a year - **Cumulative output, 540:** 17,501 kWh - **Cumulative output, 650:** 21,066 kWh - **Gap:** 3,565 kWh ## Output when hot | Condition | Cell temperature | 540 | 650 | Retained | | --- | --- | --- | --- | --- | | Standard test conditions | 25 °C | 540 W | 650 W | 100.0% of rated power | | Cool, bright day | 40 °C | 512 W | 617 W | 94.8% of rated power | | Typical summer roof | 55 °C | 483 W | 584 W | 89.5% of rated power | | Hot roof | 70 °C | 455 W | 551 W | 84.2% of rated power | ## Against the whole database | Measure | 540 | 650 | Out of | Note | | --- | --- | --- | --- | --- | | Efficiency | #9,963 | #10,443 | 14,005 | 540 leads by 480 places | | Power density | #9,905 | #10,477 | 14,005 | 540 leads by 572 places | | Heat behaviour | #10,419 | #8,778 | 14,005 | 650 leads by 1,641 places | | Weight | #4,303 | #6,836 | 14,005 | 540 leads by 2,533 places | | Warranty | #9,667 | #9,667 | 14,005 | Tied - the same position in the database | | Overall | #8,328 | #4,615 | 14,005 | 650 leads by 3,713 places | ## Questions ### Which panel is better: Waaree WSMD-540 or Waaree WSMD-650? According to our database: **Waaree WSMD-540** has higher module efficiency (**20.98%** vs **20.82%**); **Waaree WSMD-650** tolerates heat better (temp coeff **-0.340%/°C** vs **-0.350%/°C**). See the full spec comparison and 30-year energy simulation above for a complete picture. ### What is the efficiency of Waaree WSMD-540 and Waaree WSMD-650? **Waaree WSMD-540** has a module efficiency of **20.98%**, while **Waaree WSMD-650** is **20.82%**. Higher efficiency means more electricity from the same roof area - useful when space is limited. ### What cell technology does Waaree WSMD-540 use vs Waaree WSMD-650? **Waaree WSMD-540** uses **PERC** cells; **Waaree WSMD-650** uses **PERC**. Modern **n-type** technologies (**TOPCon**, **HJT**, BC) typically deliver higher efficiency and lower degradation compared to older **PERC** (p-type) cells. ### What is the warranty on Waaree WSMD-540 and Waaree WSMD-650? **Waaree WSMD-540** has a **27 years** power warranty; **Waaree WSMD-650** has a **27 years** power warranty. The power warranty guarantees a minimum percentage of rated output at the end of the warranty period (typically 80**-87%**). Product (materials) warranties are usually shorter. ## Related comparisons - [Waaree WSMD-540 vs Waaree WSMD-665](https://comparepv.com/compare/waaree-wsmd-540/waaree-wsmd-665) - 12 differences, the largest is rated power - [Waaree WSMD-540 vs Waaree WSMD-660](https://comparepv.com/compare/waaree-wsmd-540/waaree-wsmd-660) - 10 differences, the largest is rated power - [Waaree WSMD-540 vs Waaree WSMD-655](https://comparepv.com/compare/waaree-wsmd-540/waaree-wsmd-655) - 10 differences, the largest is rated power - [Waaree WSMD-540 vs Waaree WSMD-645](https://comparepv.com/compare/waaree-wsmd-540/waaree-wsmd-645) - 13 differences, the largest is rated power - [Waaree WSMD-540 vs Waaree WSMD-545](https://comparepv.com/compare/waaree-wsmd-540/waaree-wsmd-545) - The same specification on paper - [Waaree WSMD-540 vs Waaree WSMD-535](https://comparepv.com/compare/waaree-wsmd-540/waaree-wsmd-535) - One difference: module efficiency --- Source: https://comparepv.com/compare/waaree-wsmd-540/waaree-wsmd-650 Not in this file, on the page: the thirty-year yield curve year by year at a cell temperature you pick and a written summary generated on request.