--- title: "TCL Zhonghuan HSM-ND66-GK720 vs TCL Zhonghuan HSM-ND66-GK725 - Solar Panel Comparison | ComparePV" description: "Compare TCL Zhonghuan HSM-ND66-GK720 vs TCL Zhonghuan HSM-ND66-GK725 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-nd66-gk720/tcl-zhonghuan-hsm-nd66-gk725" updated: 2026-09-11 --- # TCL Zhonghuan HSM-ND66-GK720 vs TCL Zhonghuan HSM-ND66-GK725 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 | [TCL Zhonghuan HSM-ND66-GK720](https://comparepv.com/panel/tcl-zhonghuan-hsm-nd66-gk720) | [TCL Zhonghuan HSM-ND66-GK725](https://comparepv.com/panel/tcl-zhonghuan-hsm-nd66-gk725) | | Manufacturer | TCL Zhonghuan | TCL Zhonghuan | | Power | 720 Wp | 725 Wp | | Efficiency | 23.20 % | 23.30 % | | Technology | N-type | N-type | ## Every compared parameter | Parameter | GK720 | GK725 | | --- | --- | --- | | Rated power | 720 Wp | 725 Wp | | Module efficiency | 23.20 % | 23.30 % | | Power density | 231.8 Wp/m² | 233.4 Wp/m² | | Open-circuit voltage | 49.14 V | 49.36 V | | Voltage at max power | 41.08 V | 41.27 V | | Short-circuit current | 18.56 A | 18.60 A | | Current at max power | 17.53 A | 17.57 A | | Temperature coefficient | -0.280 %/°C | -0.280 %/°C | | Dimensions | 2384x1303x33 mm | 2384x1303x33 mm | | Module area | 3.106 m² | 3.106 m² | | Weight | 38.2 kg | 38.2 kg | | Weight per kWp | 53.1 kg/kWp | 52.7 kg/kWp | | Product warranty | 15 yrs | 15 yrs | | Performance warranty | 30 yrs | 30 yrs | | Annual degradation | 0.40 %/yr | 0.40 %/yr | | Cell technology | N-type | N-type | | 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 (-0.280 %/°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, GK720:** 24,157 kWh - **Cumulative output, GK725:** 24,325 kWh - **Gap:** 168 kWh ## Output when hot | Condition | Cell temperature | GK720 | GK725 | Retained | | --- | --- | --- | --- | --- | | Standard test conditions | 25 °C | 720 W | 725 W | 100.0% of rated power | | Cool, bright day | 40 °C | 690 W | 695 W | 95.8% of rated power | | Typical summer roof | 55 °C | 660 W | 664 W | 91.6% of rated power | | Hot roof | 70 °C | 629 W | 634 W | 87.4% of rated power | ## Against the whole database | Measure | GK720 | GK725 | Out of | Note | | --- | --- | --- | --- | --- | | Efficiency | #1,306 | #1,017 | 14,005 | GK725 leads by 289 places | | Power density | #1,347 | #936 | 14,005 | GK725 leads by 411 places | | Heat behaviour | #1,309 | #1,309 | 14,005 | Tied - the same position in the database | | Weight | #6,810 | #6,337 | 14,005 | GK725 leads by 473 places | | Warranty | #21 | #21 | 14,005 | Tied - the same position in the database | | Overall | #339 | #266 | 14,005 | GK725 leads by 73 places | ## Questions ### Which panel is better: TCL Zhonghuan HSM-ND66-GK720 or TCL Zhonghuan HSM-ND66-GK725? According to our database: **TCL Zhonghuan HSM-ND66-GK725** has higher module efficiency (**23.30%** vs **23.20%**). See the full spec comparison and 30-year energy simulation above for a complete picture. ### What is the efficiency of TCL Zhonghuan HSM-ND66-GK720 and TCL Zhonghuan HSM-ND66-GK725? **TCL Zhonghuan HSM-ND66-GK720** has a module efficiency of **23.20%**, while **TCL Zhonghuan HSM-ND66-GK725** is **23.30%**. Higher efficiency means more electricity from the same roof area - useful when space is limited. ### What cell technology does TCL Zhonghuan HSM-ND66-GK720 use vs TCL Zhonghuan HSM-ND66-GK725? **TCL Zhonghuan HSM-ND66-GK720** uses **N-type** cells; **TCL Zhonghuan HSM-ND66-GK725** uses **N-type**. 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-ND66-GK720 and TCL Zhonghuan HSM-ND66-GK725? **TCL Zhonghuan HSM-ND66-GK720** has a **30 years** power warranty; **TCL Zhonghuan HSM-ND66-GK725** 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-ND66-GK720 and TCL Zhonghuan HSM-ND66-GK725 bifacial panels? Both **TCL Zhonghuan HSM-ND66-GK720** and **TCL Zhonghuan HSM-ND66-GK725** 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-ND66-GK720 vs TCL Zhonghuan HSM-ND66-GK715](https://comparepv.com/compare/tcl-zhonghuan-hsm-nd66-gk720/tcl-zhonghuan-hsm-nd66-gk715) - One difference: module efficiency - [TCL Zhonghuan HSM-ND66-GK720 vs TCL Zhonghuan HSM-ND66-GK710](https://comparepv.com/compare/tcl-zhonghuan-hsm-nd66-gk720/tcl-zhonghuan-hsm-nd66-gk710) - 3 differences, the largest is module efficiency - [TCL Zhonghuan HSM-ND66-GK720 vs TCL Zhonghuan HSM-ND66-GK705](https://comparepv.com/compare/tcl-zhonghuan-hsm-nd66-gk720/tcl-zhonghuan-hsm-nd66-gk705) - 3 differences, the largest is module efficiency - [TCL Zhonghuan HSM-ND66-GK720 vs TCL Zhonghuan HSM-ND66-GK700](https://comparepv.com/compare/tcl-zhonghuan-hsm-nd66-gk720/tcl-zhonghuan-hsm-nd66-gk700) - 3 differences, the largest is module efficiency - [TCL Zhonghuan HSM-ND66-GK720 vs TCL Zhonghuan HSM-ND66-GK725 (IEC1500V)](https://comparepv.com/compare/tcl-zhonghuan-hsm-nd66-gk720/tcl-zhonghuan-hsm-nd66-gk725-iec1500v) - One difference: cell technology - [TCL Zhonghuan HSM-ND66-GK720 vs TCL Zhonghuan HSM-ND66-GK720 (IEC1500V)](https://comparepv.com/compare/tcl-zhonghuan-hsm-nd66-gk720/tcl-zhonghuan-hsm-nd66-gk720-iec1500v) - 2 differences, the largest is cell technology --- Source: https://comparepv.com/compare/tcl-zhonghuan-hsm-nd66-gk720/tcl-zhonghuan-hsm-nd66-gk725 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.