--- title: "Waaree Bi-68-655 vs Waaree Bi-68-660 - Solar Panel Comparison | ComparePV" description: "Compare Waaree Bi-68-655 vs Waaree Bi-68-660 side by side: what actually differs, output when it is hot, thirty-year production, and the full specification." source: "https://comparepv.com/compare/waaree-bi-68-655/waaree-bi-68-660" updated: 2026-09-11 --- # Waaree Bi-68-655 vs Waaree Bi-68-660 Identical on every published parameter All 19 comparable parameters agree. Two records this alike are usually one panel sold under two names, or two bins of the same production line - decide on price and on who you would rather buy from. ## The two panels | Attribute | A | B | | --- | --- | --- | | Panel | [Waaree Bi-68-655](https://comparepv.com/panel/waaree-bi-68-655) | [Waaree Bi-68-660](https://comparepv.com/panel/waaree-bi-68-660) | | Manufacturer | Waaree | Waaree | | Power | 655 Wp | 660 Wp | | Efficiency | 20.99 % | 21.13 % | | Technology | PERC | PERC | ## Every compared parameter | Parameter | 655 | 660 | | --- | --- | --- | | Rated power | 655 Wp | 660 Wp | | Module efficiency | 20.99 % | 21.13 % | | Power density | 209.6 Wp/m² | 211.2 Wp/m² | | Open-circuit voltage | 46.26 V | 46.40 V | | Voltage at max power | 37.94 V | 38.06 V | | Short-circuit current | 17.90 A | 17.98 A | | Current at max power | 17.29 A | 17.35 A | | Temperature coefficient | -0.340 %/°C | -0.340 %/°C | | Dimensions | 2400x1302x35 mm | 2400x1302x35 mm | | Module area | 3.125 m² | 3.125 m² | | Weight | 39.0 kg | 39.0 kg | | Weight per kWp | 59.5 kg/kWp | 59.1 kg/kWp | | Product warranty | 12 yrs | 12 yrs | | Performance warranty | 30 yrs | 30 yrs | | Annual degradation | 0.55 %/yr | 0.55 %/yr | | Cell technology | PERC | PERC | | Cell type | Monocrystalline | Monocrystalline | | Cell count | 132 | 132 | | Bifacial | Yes | Yes | ## Thirty-year yield Each panel's own declared degradation curve, at 1,200 kWh/kWp a year Same temp coeff. for both panels (-0.340 %/°C), so a warmer roof scales both curves by the same factor: the totals fall together and neither panel gains on the other. - **Cumulative output, 655:** 21,228 kWh - **Cumulative output, 660:** 21,390 kWh - **Gap:** 162 kWh ## Output when hot | Condition | Cell temperature | 655 | 660 | Retained | | --- | --- | --- | --- | --- | | Standard test conditions | 25 °C | 655 W | 660 W | 100.0% of rated power | | Cool, bright day | 40 °C | 622 W | 626 W | 94.9% of rated power | | Typical summer roof | 55 °C | 588 W | 593 W | 89.8% of rated power | | Hot roof | 70 °C | 555 W | 559 W | 84.7% of rated power | ## Against the whole database | Measure | 655 | 660 | Out of | Note | | --- | --- | --- | --- | --- | | Efficiency | #9,944 | #9,239 | 14,005 | 660 leads by 705 places | | Power density | #9,923 | #9,251 | 14,005 | 660 leads by 672 places | | Heat behaviour | #8,778 | #8,778 | 14,005 | Tied - the same position in the database | | Weight | #12,200 | #12,010 | 14,005 | 660 leads by 190 places | | Warranty | #21 | #21 | 14,005 | Tied - the same position in the database | | Overall | #3,643 | #3,318 | 14,005 | 660 leads by 325 places | ## Questions ### Which panel is better: Waaree Bi-68-655 or Waaree Bi-68-660? According to our database: **Waaree Bi-68-660** has higher module efficiency (**21.13%** vs **20.99%**). See the full spec comparison and 30-year energy simulation above for a complete picture. ### What is the efficiency of Waaree Bi-68-655 and Waaree Bi-68-660? **Waaree Bi-68-655** has a module efficiency of **20.99%**, while **Waaree Bi-68-660** is **21.13%**. Higher efficiency means more electricity from the same roof area - useful when space is limited. ### What cell technology does Waaree Bi-68-655 use vs Waaree Bi-68-660? **Waaree Bi-68-655** uses **PERC** cells; **Waaree Bi-68-660** 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 Bi-68-655 and Waaree Bi-68-660? **Waaree Bi-68-655** has a **30 years** power warranty; **Waaree Bi-68-660** has a **30 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. ### Are Waaree Bi-68-655 and Waaree Bi-68-660 bifacial panels? Both **Waaree Bi-68-655** and **Waaree Bi-68-660** are bifacial - they capture reflected light from the ground, which can add 5**-15%** more annual energy on ground-mount or elevated rooftop installations with a light surface beneath. ## Related comparisons - [Waaree Bi-68-655 vs Waaree Bi-68-665](https://comparepv.com/compare/waaree-bi-68-655/waaree-bi-68-665) - 3 differences, the largest is module efficiency - [Waaree Bi-68-655 vs Waaree Bi-68-650](https://comparepv.com/compare/waaree-bi-68-655/waaree-bi-68-650) - The same specification on paper - [Waaree Bi-68-655 vs Waaree Bi-68-645](https://comparepv.com/compare/waaree-bi-68-655/waaree-bi-68-645) - 3 differences, the largest is module efficiency - [Waaree Bi-68-655 vs Waaree Bi-66-600](https://comparepv.com/compare/waaree-bi-68-655/waaree-bi-66-600) - 7 differences, the largest is rated power - [Waaree Bi-68-655 vs Waaree Bi-66-595](https://comparepv.com/compare/waaree-bi-68-655/waaree-bi-66-595) - 7 differences, the largest is rated power - [Waaree Bi-68-655 vs Waaree Bi-66-590](https://comparepv.com/compare/waaree-bi-68-655/waaree-bi-66-590) - 8 differences, the largest is rated power --- Source: https://comparepv.com/compare/waaree-bi-68-655/waaree-bi-68-660 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.