--- title: "TCL Zhonghuan HSM-ND66-GK715 vs TCL Zhonghuan HSM-ND66-GK715 (IEC1500V) - Solar Panel Comparison | ComparePV" description: "Compare TCL Zhonghuan HSM-ND66-GK715 vs TCL Zhonghuan HSM-ND66-GK715 (IEC1500V) 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-gk715/tcl-zhonghuan-hsm-nd66-gk715-iec1500v" updated: 2026-09-11 --- # TCL Zhonghuan HSM-ND66-GK715 vs TCL Zhonghuan HSM-ND66-GK715 (IEC1500V) One difference, none of them an advantage The largest is cell technology: N-type vs TOPCon. 17 of 18 comparable parameters are identical, with 1 more left out because at least one datasheet does not publish it. ## The two panels | Attribute | A | B | | --- | --- | --- | | Panel | [TCL Zhonghuan HSM-ND66-GK715](https://comparepv.com/panel/tcl-zhonghuan-hsm-nd66-gk715) | [TCL Zhonghuan HSM-ND66-GK715 (IEC1500V)](https://comparepv.com/panel/tcl-zhonghuan-hsm-nd66-gk715-iec1500v) | | Manufacturer | TCL Zhonghuan | TCL Zhonghuan | | Power | 715 Wp | 715 Wp | | Efficiency | 23.00 % | 22.90 % | | Technology | N-type | TOPCon | ## Where they differ Ranked by how much the difference matters, not by datasheet order. | Parameter | GK715 | GK715 (IEC1500V) | Difference | | --- | --- | --- | --- | | Cell technology | N-type | TOPCon | N-type vs TOPCon | ## Every compared parameter | Parameter | GK715 | GK715 (IEC1500V) | | --- | --- | --- | | Rated power | 715 Wp | 715 Wp | | Module efficiency | 23.00 % | 22.90 % | | Power density | 230.2 Wp/m² | 230.2 Wp/m² | | Open-circuit voltage | 48.92 V | 48.92 V | | Voltage at max power | 40.89 V | 40.89 V | | Short-circuit current | 18.52 A | 18.52 A | | Current at max power | 17.49 A | 17.49 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 | 53.4 kg/kWp | 53.4 kg/kWp | | Product warranty | 15 yrs | 15 yrs | | Performance warranty | 30 yrs | 30 yrs | | Annual degradation | 0.40 %/yr | - | | Cell technology | N-type | TOPCon | | Cell type | Monocrystalline | Monocrystalline | | Cell count | 132 | 132 | | Bifacial | Yes | Yes | ## Thirty-year yield Declared first-year losses, with 0.40% a year afterwards assumed for both panels, 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, GK715:** 23,990 kWh - **Cumulative output, GK715 (IEC1500V):** 23,990 kWh - **Gap:** No difference ## Output when hot | Condition | Cell temperature | GK715 | GK715 (IEC1500V) | Retained | | --- | --- | --- | --- | --- | | Standard test conditions | 25 °C | 715 W | 715 W | 100.0% of rated power | | Cool, bright day | 40 °C | 685 W | 685 W | 95.8% of rated power | | Typical summer roof | 55 °C | 655 W | 655 W | 91.6% of rated power | | Hot roof | 70 °C | 625 W | 625 W | 87.4% of rated power | ## Against the whole database | Measure | GK715 | GK715 (IEC1500V) | Out of | Note | | --- | --- | --- | --- | --- | | Efficiency | #1,919 | #2,359 | 14,005 | GK715 leads by 440 places | | Power density | #2,018 | #2,018 | 14,005 | Tied - the same position in the database | | Heat behaviour | #1,309 | #1,309 | 14,005 | Tied - the same position in the database | | Weight | #7,356 | #7,356 | 14,005 | Tied - the same position in the database | | Warranty | #21 | #21 | 14,005 | Tied - the same position in the database | | Overall | #450 | #496 | 14,005 | GK715 leads by 46 places | ## Questions ### Which panel is better: TCL Zhonghuan HSM-ND66-GK715 or TCL Zhonghuan HSM-ND66-GK715 (IEC1500V)? According to our database: **TCL Zhonghuan HSM-ND66-GK715** has higher module efficiency (**23.00%** vs **22.90%**). See the full spec comparison and 30-year energy simulation above for a complete picture. ### What is the efficiency of TCL Zhonghuan HSM-ND66-GK715 and TCL Zhonghuan HSM-ND66-GK715 (IEC1500V)? **TCL Zhonghuan HSM-ND66-GK715** has a module efficiency of **23.00%**, while **TCL Zhonghuan **HSM-ND66-GK715** (IEC1500V)** is **22.90%**. Higher efficiency means more electricity from the same roof area - useful when space is limited. ### What cell technology does TCL Zhonghuan HSM-ND66-GK715 use vs TCL Zhonghuan HSM-ND66-GK715 (IEC1500V)? **TCL Zhonghuan HSM-ND66-GK715** uses **N-type** cells; **TCL Zhonghuan **HSM-ND66-GK715** (IEC1500V)** 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-ND66-GK715 and TCL Zhonghuan HSM-ND66-GK715 (IEC1500V)? **TCL Zhonghuan HSM-ND66-GK715** has a **30 years** power warranty; **TCL Zhonghuan **HSM-ND66-GK715** (IEC1500V)** 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-GK715 and TCL Zhonghuan HSM-ND66-GK715 (IEC1500V) bifacial panels? Both **TCL Zhonghuan HSM-ND66-GK715** and **TCL Zhonghuan **HSM-ND66-GK715** (IEC1500V)** 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-GK715 vs TCL Zhonghuan HSM-ND66-GK725](https://comparepv.com/compare/tcl-zhonghuan-hsm-nd66-gk715/tcl-zhonghuan-hsm-nd66-gk725) - 3 differences, the largest is module efficiency - [TCL Zhonghuan HSM-ND66-GK715 vs TCL Zhonghuan HSM-ND66-GK720](https://comparepv.com/compare/tcl-zhonghuan-hsm-nd66-gk715/tcl-zhonghuan-hsm-nd66-gk720) - One difference: module efficiency - [TCL Zhonghuan HSM-ND66-GK715 vs TCL Zhonghuan HSM-ND66-GK710](https://comparepv.com/compare/tcl-zhonghuan-hsm-nd66-gk715/tcl-zhonghuan-hsm-nd66-gk710) - The same specification on paper - [TCL Zhonghuan HSM-ND66-GK715 vs TCL Zhonghuan HSM-ND66-GK705](https://comparepv.com/compare/tcl-zhonghuan-hsm-nd66-gk715/tcl-zhonghuan-hsm-nd66-gk705) - 3 differences, the largest is module efficiency - [TCL Zhonghuan HSM-ND66-GK715 vs TCL Zhonghuan HSM-ND66-GK700](https://comparepv.com/compare/tcl-zhonghuan-hsm-nd66-gk715/tcl-zhonghuan-hsm-nd66-gk700) - 3 differences, the largest is module efficiency - [TCL Zhonghuan HSM-ND66-GK715 (IEC1500V) vs TCL Zhonghuan HSM-ND66-GK725 (IEC1500V)](https://comparepv.com/compare/tcl-zhonghuan-hsm-nd66-gk715-iec1500v/tcl-zhonghuan-hsm-nd66-gk725-iec1500v) - 3 differences, the largest is module efficiency --- Source: https://comparepv.com/compare/tcl-zhonghuan-hsm-nd66-gk715/tcl-zhonghuan-hsm-nd66-gk715-iec1500v 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.