--- title: "Tata Power Solar TP610LG10B vs Tata Power Solar TP621LG10B - Solar Panel Comparison | ComparePV" description: "Compare Tata Power Solar TP610LG10B vs Tata Power Solar TP621LG10B side by side: what actually differs, output when it is hot, thirty-year production, and the full specification." source: "https://comparepv.com/compare/tata-power-solar-tp610lg10b/tata-power-solar-tp621lg10b" updated: 2026-09-11 --- # Tata Power Solar TP610LG10B vs Tata Power Solar TP621LG10B TP621LG10B leads on the differences that matter The largest is module efficiency: 0.40 pp more efficient. 16 of 19 comparable parameters are identical. ## The two panels | Attribute | A | B | | --- | --- | --- | | Panel | [Tata Power Solar TP610LG10B](https://comparepv.com/panel/tata-power-solar-tp610lg10b) | [Tata Power Solar TP621LG10B](https://comparepv.com/panel/tata-power-solar-tp621lg10b) | | Manufacturer | Tata Power Solar | Tata Power Solar | | Power | 610 Wp | 621 Wp | | Efficiency | 21.90 % | 22.30 % | | Technology | PERC | PERC | ## Where they differ Ranked by how much the difference matters, not by datasheet order. | Parameter | TP610LG10B | TP621LG10B | Difference | | --- | --- | --- | --- | | Module efficiency | 21.90 % | 22.30 % | +0.40 pp for TP621LG10B | | Power density | 219.0 Wp/m² | 223.0 Wp/m² | +3.9 Wp/m² for TP621LG10B | | Rated power | 610 Wp | 621 Wp | +11 W for TP621LG10B | ## Every compared parameter | Parameter | TP610LG10B | TP621LG10B | | --- | --- | --- | | Rated power | 610 Wp | 621 Wp | | Module efficiency | 21.90 % | 22.30 % | | Power density | 219.0 Wp/m² | 223.0 Wp/m² | | Open-circuit voltage | 54.28 V | 54.52 V | | Voltage at max power | 46.56 V | 46.80 V | | Short-circuit current | 13.74 A | 13.83 A | | Current at max power | 13.10 A | 13.26 A | | Temperature coefficient | -0.370 %/°C | -0.370 %/°C | | Dimensions | 2456x1134x35 mm | 2456x1134x35 mm | | Module area | 2.785 m² | 2.785 m² | | Weight | 36.0 kg | 36.0 kg | | Weight per kWp | 59.0 kg/kWp | 58.0 kg/kWp | | Product warranty | 12 yrs | 12 yrs | | Performance warranty | 30 yrs | 30 yrs | | Annual degradation | 0.60 %/yr | 0.60 %/yr | | Cell technology | PERC | PERC | | Cell type | Monocrystalline | Monocrystalline | | Cell count | 156 | 156 | | 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 (-0.370 %/°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, TP610LG10B:** 19,500 kWh - **Cumulative output, TP621LG10B:** 19,852 kWh - **Gap:** 352 kWh ## Output when hot | Condition | Cell temperature | TP610LG10B | TP621LG10B | Retained | | --- | --- | --- | --- | --- | | Standard test conditions | 25 °C | 610 W | 621 W | 100.0% of rated power | | Cool, bright day | 40 °C | 576 W | 587 W | 94.5% of rated power | | Typical summer roof | 55 °C | 542 W | 552 W | 88.9% of rated power | | Hot roof | 70 °C | 508 W | 518 W | 83.3% of rated power | ## Against the whole database | Measure | TP610LG10B | TP621LG10B | Out of | Note | | --- | --- | --- | --- | --- | | Efficiency | #6,783 | #5,100 | 14,005 | TP621LG10B leads by 1,683 places | | Power density | #6,761 | #5,093 | 14,005 | TP621LG10B leads by 1,668 places | | Heat behaviour | #13,081 | #13,081 | 14,005 | Tied - the same position in the database | | Weight | #11,981 | #11,501 | 14,005 | TP621LG10B leads by 480 places | | Warranty | #21 | #21 | 14,005 | Tied - the same position in the database | | Overall | #4,188 | #3,329 | 14,005 | TP621LG10B leads by 859 places | ## Questions ### Which panel is better: Tata Power Solar TP610LG10B or Tata Power Solar TP621LG10B? According to our database: **Tata Power Solar TP621LG10B** has higher module efficiency (**22.30%** vs **21.90%**). See the full spec comparison and 30-year energy simulation above for a complete picture. ### What is the efficiency of Tata Power Solar TP610LG10B and Tata Power Solar TP621LG10B? **Tata Power Solar TP610LG10B** has a module efficiency of **21.90%**, while **Tata Power Solar TP621LG10B** is **22.30%**. Higher efficiency means more electricity from the same roof area - useful when space is limited. ### What cell technology does Tata Power Solar TP610LG10B use vs Tata Power Solar TP621LG10B? **Tata Power Solar TP610LG10B** uses **PERC** cells; **Tata Power Solar TP621LG10B** 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 Tata Power Solar TP610LG10B and Tata Power Solar TP621LG10B? **Tata Power Solar TP610LG10B** has a **30 years** power warranty; **Tata Power Solar TP621LG10B** 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 Tata Power Solar TP610LG10B and Tata Power Solar TP621LG10B bifacial panels? Both **Tata Power Solar TP610LG10B** and **Tata Power Solar TP621LG10B** 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 - [Tata Power Solar TP610LG10B vs Tata Power Solar TP642LG10B](https://comparepv.com/compare/tata-power-solar-tp610lg10b/tata-power-solar-tp642lg10b) - 4 differences, the largest is module efficiency - [Tata Power Solar TP610LG10B vs Tata Power Solar TP637LG10B](https://comparepv.com/compare/tata-power-solar-tp610lg10b/tata-power-solar-tp637lg10b) - 4 differences, the largest is module efficiency - [Tata Power Solar TP610LG10B vs Tata Power Solar TP631LG10B](https://comparepv.com/compare/tata-power-solar-tp610lg10b/tata-power-solar-tp631lg10b) - 3 differences, the largest is module efficiency - [Tata Power Solar TP610LG10B vs Tata Power Solar TP626LG10B](https://comparepv.com/compare/tata-power-solar-tp610lg10b/tata-power-solar-tp626lg10b) - 3 differences, the largest is module efficiency - [Tata Power Solar TP610LG10B vs Tata Power Solar TP615LG10B](https://comparepv.com/compare/tata-power-solar-tp610lg10b/tata-power-solar-tp615lg10b) - The same specification on paper - [Tata Power Solar TP610LG10B vs Tata Power Solar TP600LG10B](https://comparepv.com/compare/tata-power-solar-tp610lg10b/tata-power-solar-tp600lg10b) - 3 differences, the largest is module efficiency --- Source: https://comparepv.com/compare/tata-power-solar-tp610lg10b/tata-power-solar-tp621lg10b 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.