--- title: "Tata Power Solar TP550HG10TB vs Tata Power Solar TP642LG10B - Solar Panel Comparison | ComparePV" description: "Compare Tata Power Solar TP550HG10TB vs Tata Power Solar TP642LG10B 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-tp550hg10tb/tata-power-solar-tp642lg10b" updated: 2026-09-11 --- # Tata Power Solar TP550HG10TB vs Tata Power Solar TP642LG10B TP642LG10B leads on the differences that matter The largest is module efficiency: 1.76 pp more efficient. 3 of 19 comparable parameters are identical. ## The two panels | Attribute | A | B | | --- | --- | --- | | Panel | [Tata Power Solar TP550HG10TB](https://comparepv.com/panel/tata-power-solar-tp550hg10tb) | [Tata Power Solar TP642LG10B](https://comparepv.com/panel/tata-power-solar-tp642lg10b) | | Manufacturer | Tata Power Solar | Tata Power Solar | | Power | 550 Wp | 642 Wp | | Efficiency | 21.29 % | 23.05 % | | Technology | PERC | PERC | ## Where they differ Ranked by how much the difference matters, not by datasheet order. | Parameter | TP550HG10TB | TP642LG10B | Difference | | --- | --- | --- | --- | | Module efficiency | 21.29 % | 23.05 % | +1.76 pp for TP642LG10B | | Rated power | 550 Wp | 642 Wp | +92 W for TP642LG10B | | Power density | 212.9 Wp/m² | 230.5 Wp/m² | +17.6 Wp/m² for TP642LG10B | | Performance warranty | 25 yrs | 30 yrs | +5 yrs for TP642LG10B | | Weight | 29.0 kg | 36.0 kg | -7.0 kg for TP550HG10TB | | Annual degradation | 0.72 %/yr | 0.60 %/yr | -0.12 %/yr for TP642LG10B | | Open-circuit voltage | 49.75 V | 55.00 V | 5.25 V apart | | Module area | 2.583 m² | 2.785 m² | 0.202 m² apart | | Product warranty | 10 yrs | 12 yrs | +2 yrs for TP642LG10B | | Weight per kWp | 52.7 kg/kWp | 56.1 kg/kWp | -3.3 kg/kWp for TP550HG10TB | | Temperature coefficient | -0.360 %/°C | -0.370 %/°C | +0.010 %/°C for TP550HG10TB | | Voltage at max power | 42.62 V | 47.28 V | 4.66 V apart | | Cell count | 144 | 156 | 12 cells apart | | Short-circuit current | 13.42 A | 14.01 A | 0.59 A apart | | Dimensions | 2278x1134x35 mm | 2456x1134x35 mm | 2278x1134x35 mm vs 2456x1134x35 mm | | Current at max power | 12.90 A | 13.58 A | 0.68 A apart | ## Every compared parameter | Parameter | TP550HG10TB | TP642LG10B | | --- | --- | --- | | Rated power | 550 Wp | 642 Wp | | Module efficiency | 21.29 % | 23.05 % | | Power density | 212.9 Wp/m² | 230.5 Wp/m² | | Open-circuit voltage | 49.75 V | 55.00 V | | Voltage at max power | 42.62 V | 47.28 V | | Short-circuit current | 13.42 A | 14.01 A | | Current at max power | 12.90 A | 13.58 A | | Temperature coefficient | -0.360 %/°C | -0.370 %/°C | | Dimensions | 2278x1134x35 mm | 2456x1134x35 mm | | Module area | 2.583 m² | 2.785 m² | | Weight | 29.0 kg | 36.0 kg | | Weight per kWp | 52.7 kg/kWp | 56.1 kg/kWp | | Product warranty | 10 yrs | 12 yrs | | Performance warranty | 25 yrs | 30 yrs | | Annual degradation | 0.72 %/yr | 0.60 %/yr | | Cell technology | PERC | PERC | | Cell type | Monocrystalline | Monocrystalline | | Cell count | 144 | 156 | | Bifacial | Yes | Yes | ## Thirty-year yield Each panel's own declared degradation curve, at 1,200 kWh/kWp a year - **Cumulative output, TP550HG10TB:** 17,238 kWh - **Cumulative output, TP642LG10B:** 20,523 kWh - **Gap:** 3,285 kWh ## Output when hot | Condition | Cell temperature | TP550HG10TB | TP642LG10B | Retained | | --- | --- | --- | --- | --- | | Standard test conditions | 25 °C | 550 W | 642 W | 100.0% of rated power | | Cool, bright day | 40 °C | 520 W | 606 W | 94.5% of rated power | | Typical summer roof | 55 °C | 491 W | 571 W | 88.9% of rated power | | Hot roof | 70 °C | 461 W | 535 W | 83.3% of rated power | ## Against the whole database | Measure | TP550HG10TB | TP642LG10B | Out of | Note | | --- | --- | --- | --- | --- | | Efficiency | #8,708 | #1,700 | 14,005 | TP642LG10B leads by 7,008 places | | Power density | #8,497 | #1,701 | 14,005 | TP642LG10B leads by 6,796 places | | Heat behaviour | #12,345 | #13,081 | 14,005 | TP550HG10TB leads by 736 places | | Weight | #6,373 | #10,369 | 14,005 | TP550HG10TB leads by 3,996 places | | Warranty | #9,798 | #21 | 14,005 | TP642LG10B leads by 9,777 places | | Overall | #8,571 | #1,920 | 14,005 | TP642LG10B leads by 6,651 places | ## Questions ### Which panel is better: Tata Power Solar TP550HG10TB or Tata Power Solar TP642LG10B? According to our database: **Tata Power Solar TP642LG10B** has higher module efficiency (**23.05%** vs **21.29%**); **Tata Power Solar TP550HG10TB** tolerates heat better (temp coeff **-0.360%/°C** vs **-0.370%/°C**). See the full spec comparison and 30-year energy simulation above for a complete picture. ### What is the efficiency of Tata Power Solar TP550HG10TB and Tata Power Solar TP642LG10B? **Tata Power Solar TP550HG10TB** has a module efficiency of **21.29%**, while **Tata Power Solar TP642LG10B** is **23.05%**. Higher efficiency means more electricity from the same roof area - useful when space is limited. ### What cell technology does Tata Power Solar TP550HG10TB use vs Tata Power Solar TP642LG10B? **Tata Power Solar TP550HG10TB** uses **PERC** cells; **Tata Power Solar TP642LG10B** 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 TP550HG10TB and Tata Power Solar TP642LG10B? **Tata Power Solar TP550HG10TB** has a **25 years** power warranty; **Tata Power Solar TP642LG10B** 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 TP550HG10TB and Tata Power Solar TP642LG10B bifacial panels? Both **Tata Power Solar TP550HG10TB** and **Tata Power Solar TP642LG10B** 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 TP550HG10TB vs Tata Power Solar TP545HG10TB](https://comparepv.com/compare/tata-power-solar-tp550hg10tb/tata-power-solar-tp545hg10tb) - The same specification on paper - [Tata Power Solar TP550HG10TB vs Tata Power Solar TP540HG10TB](https://comparepv.com/compare/tata-power-solar-tp550hg10tb/tata-power-solar-tp540hg10tb) - 3 differences, the largest is module efficiency - [Tata Power Solar TP550HG10TB vs Tata Power Solar TP535HG10TB](https://comparepv.com/compare/tata-power-solar-tp550hg10tb/tata-power-solar-tp535hg10tb) - 3 differences, the largest is module efficiency - [Tata Power Solar TP550HG10TB vs Tata Power Solar TP530HG10TB](https://comparepv.com/compare/tata-power-solar-tp550hg10tb/tata-power-solar-tp530hg10tb) - 3 differences, the largest is module efficiency - [Tata Power Solar TP642LG10B vs Tata Power Solar TP637LG10B](https://comparepv.com/compare/tata-power-solar-tp642lg10b/tata-power-solar-tp637lg10b) - The same specification on paper - [Tata Power Solar TP642LG10B vs Tata Power Solar TP631LG10B](https://comparepv.com/compare/tata-power-solar-tp642lg10b/tata-power-solar-tp631lg10b) - 3 differences, the largest is module efficiency --- Source: https://comparepv.com/compare/tata-power-solar-tp550hg10tb/tata-power-solar-tp642lg10b 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.