--- title: "TCL Zhonghuan HSM-ND54-GR490 vs TCL Zhonghuan HSM-ND54-GR505 - Solar Panel Comparison | ComparePV" description: "Compare TCL Zhonghuan HSM-ND54-GR490 vs TCL Zhonghuan HSM-ND54-GR505 side by side: what actually differs, output when it is hot, thirty-year production, and the full specification." source: "https://comparepv.com/compare/tcl-zhonghuan-hsm-nd54-gr490/tcl-zhonghuan-hsm-nd54-gr505" updated: 2026-09-11 --- # TCL Zhonghuan HSM-ND54-GR490 vs TCL Zhonghuan HSM-ND54-GR505 GR505 leads on the differences that matter The largest is module efficiency: 0.70 pp more efficient. 16 of 19 comparable parameters are identical. ## The two panels | Attribute | A | B | | --- | --- | --- | | Panel | [TCL Zhonghuan HSM-ND54-GR490](https://comparepv.com/panel/tcl-zhonghuan-hsm-nd54-gr490) | [TCL Zhonghuan HSM-ND54-GR505](https://comparepv.com/panel/tcl-zhonghuan-hsm-nd54-gr505) | | Manufacturer | TCL Zhonghuan | TCL Zhonghuan | | Power | 490 Wp | 505 Wp | | Efficiency | 22.00 % | 22.70 % | | Technology | TOPCon | TOPCon | ## Where they differ Ranked by how much the difference matters, not by datasheet order. | Parameter | GR490 | GR505 | Difference | | --- | --- | --- | --- | | Module efficiency | 22.00 % | 22.70 % | +0.70 pp for GR505 | | Power density | 220.3 Wp/m² | 227.1 Wp/m² | +6.7 Wp/m² for GR505 | | Rated power | 490 Wp | 505 Wp | +15 W for GR505 | ## Every compared parameter | Parameter | GR490 | GR505 | | --- | --- | --- | | Rated power | 490 Wp | 505 Wp | | Module efficiency | 22.00 % | 22.70 % | | Power density | 220.3 Wp/m² | 227.1 Wp/m² | | Open-circuit voltage | 39.50 V | 40.14 V | | Voltage at max power | 33.30 V | 33.90 V | | Short-circuit current | 15.67 A | 15.88 A | | Current at max power | 14.72 A | 14.90 A | | Temperature coefficient | -0.290 %/°C | -0.290 %/°C | | Dimensions | 1961x1134x30 mm | 1961x1134x30 mm | | Module area | 2.224 m² | 2.224 m² | | Weight | 27.0 kg | 27.0 kg | | Weight per kWp | 55.1 kg/kWp | 53.5 kg/kWp | | Product warranty | 25 yrs | 25 yrs | | Performance warranty | 30 yrs | 30 yrs | | Annual degradation | 0.40 %/yr | 0.40 %/yr | | Cell technology | TOPCon | TOPCon | | Cell type | Monocrystalline | Monocrystalline | | Cell count | 108 | 108 | | 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 (-0.290 %/°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, GR490:** 16,440 kWh - **Cumulative output, GR505:** 16,944 kWh - **Gap:** 504 kWh ## Output when hot | Condition | Cell temperature | GR490 | GR505 | Retained | | --- | --- | --- | --- | --- | | Standard test conditions | 25 °C | 490 W | 505 W | 100.0% of rated power | | Cool, bright day | 40 °C | 469 W | 483 W | 95.7% of rated power | | Typical summer roof | 55 °C | 447 W | 461 W | 91.3% of rated power | | Hot roof | 70 °C | 426 W | 439 W | 87.0% of rated power | ## Against the whole database | Measure | GR490 | GR505 | Out of | Note | | --- | --- | --- | --- | --- | | Efficiency | #6,517 | #3,307 | 14,005 | GR505 leads by 3,210 places | | Power density | #6,276 | #3,312 | 14,005 | GR505 leads by 2,964 places | | Heat behaviour | #2,165 | #2,165 | 14,005 | Tied - the same position in the database | | Weight | #9,526 | #7,409 | 14,005 | GR505 leads by 2,117 places | | Warranty | #21 | #21 | 14,005 | Tied - the same position in the database | | Overall | #5,434 | #4,152 | 14,005 | GR505 leads by 1,282 places | ## Questions ### Which panel is better: TCL Zhonghuan HSM-ND54-GR490 or TCL Zhonghuan HSM-ND54-GR505? According to our database: **TCL Zhonghuan HSM-ND54-GR505** has higher module efficiency (**22.70%** vs **22.00%**). See the full spec comparison and 30-year energy simulation above for a complete picture. ### What is the efficiency of TCL Zhonghuan HSM-ND54-GR490 and TCL Zhonghuan HSM-ND54-GR505? **TCL Zhonghuan HSM-ND54-GR490** has a module efficiency of **22.00%**, while **TCL Zhonghuan HSM-ND54-GR505** is **22.70%**. Higher efficiency means more electricity from the same roof area - useful when space is limited. ### What cell technology does TCL Zhonghuan HSM-ND54-GR490 use vs TCL Zhonghuan HSM-ND54-GR505? **TCL Zhonghuan HSM-ND54-GR490** uses **TOPCon** cells; **TCL Zhonghuan HSM-ND54-GR505** uses **TOPCon**. 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 TCL Zhonghuan HSM-ND54-GR490 and TCL Zhonghuan HSM-ND54-GR505? **TCL Zhonghuan HSM-ND54-GR490** has a **30 years** power warranty; **TCL Zhonghuan HSM-ND54-GR505** 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 TCL Zhonghuan HSM-ND54-GR490 and TCL Zhonghuan HSM-ND54-GR505 bifacial panels? Both **TCL Zhonghuan HSM-ND54-GR490** and **TCL Zhonghuan HSM-ND54-GR505** 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 - [TCL Zhonghuan HSM-ND54-GR490 vs TCL Zhonghuan HSM-ND54-GR515](https://comparepv.com/compare/tcl-zhonghuan-hsm-nd54-gr490/tcl-zhonghuan-hsm-nd54-gr515) - 6 differences, the largest is module efficiency - [TCL Zhonghuan HSM-ND54-GR490 vs TCL Zhonghuan HSM-ND54-GR510](https://comparepv.com/compare/tcl-zhonghuan-hsm-nd54-gr490/tcl-zhonghuan-hsm-nd54-gr510) - 4 differences, the largest is module efficiency - [TCL Zhonghuan HSM-ND54-GR490 vs TCL Zhonghuan HSM-ND54-GR500](https://comparepv.com/compare/tcl-zhonghuan-hsm-nd54-gr490/tcl-zhonghuan-hsm-nd54-gr500) - 3 differences, the largest is module efficiency - [TCL Zhonghuan HSM-ND54-GR490 vs TCL Zhonghuan HSM-ND54-GR495](https://comparepv.com/compare/tcl-zhonghuan-hsm-nd54-gr490/tcl-zhonghuan-hsm-nd54-gr495) - One difference: module efficiency - [TCL Zhonghuan HSM-ND54-GR490 vs TCL Zhonghuan HSM-ND66-GK725 (IEC1500V)](https://comparepv.com/compare/tcl-zhonghuan-hsm-nd54-gr490/tcl-zhonghuan-hsm-nd66-gk725-iec1500v) - 14 differences, the largest is module efficiency - [TCL Zhonghuan HSM-ND54-GR490 vs TCL Zhonghuan HSM-ND66-GK725](https://comparepv.com/compare/tcl-zhonghuan-hsm-nd54-gr490/tcl-zhonghuan-hsm-nd66-gk725) - 15 differences, the largest is module efficiency --- Source: https://comparepv.com/compare/tcl-zhonghuan-hsm-nd54-gr490/tcl-zhonghuan-hsm-nd54-gr505 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.