--- title: "TCL Zhonghuan HSM-BD60-LA505 vs TCL Zhonghuan HSM-BD60-LA520 - Solar Panel Comparison | ComparePV" description: "Compare TCL Zhonghuan HSM-BD60-LA505 vs TCL Zhonghuan HSM-BD60-LA520 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-bd60-la505/tcl-zhonghuan-hsm-bd60-la520" updated: 2026-09-11 --- # TCL Zhonghuan HSM-BD60-LA505 vs TCL Zhonghuan HSM-BD60-LA520 LA520 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-BD60-LA505](https://comparepv.com/panel/tcl-zhonghuan-hsm-bd60-la505) | [TCL Zhonghuan HSM-BD60-LA520](https://comparepv.com/panel/tcl-zhonghuan-hsm-bd60-la520) | | Manufacturer | TCL Zhonghuan | TCL Zhonghuan | | Power | 505 Wp | 520 Wp | | Efficiency | 22.80 % | 23.50 % | | Technology | Back Contact | Back Contact | ## Where they differ Ranked by how much the difference matters, not by datasheet order. | Parameter | LA505 | LA520 | Difference | | --- | --- | --- | --- | | Module efficiency | 22.80 % | 23.50 % | +0.70 pp for LA520 | | Power density | 227.9 Wp/m² | 234.7 Wp/m² | +6.8 Wp/m² for LA520 | | Rated power | 505 Wp | 520 Wp | +15 W for LA520 | ## Every compared parameter | Parameter | LA505 | LA520 | | --- | --- | --- | | Rated power | 505 Wp | 520 Wp | | Module efficiency | 22.80 % | 23.50 % | | Power density | 227.9 Wp/m² | 234.7 Wp/m² | | Open-circuit voltage | 45.12 V | 45.42 V | | Voltage at max power | 38.00 V | 38.30 V | | Short-circuit current | 14.11 A | 14.29 A | | Current at max power | 13.30 A | 13.58 A | | Temperature coefficient | -0.260 %/°C | -0.260 %/°C | | Dimensions | 1954x1134x30 mm | 1954x1134x30 mm | | Module area | 2.216 m² | 2.216 m² | | Weight | 23.5 kg | 23.5 kg | | Weight per kWp | 46.5 kg/kWp | 45.2 kg/kWp | | Product warranty | 25 yrs | 25 yrs | | Performance warranty | 30 yrs | 30 yrs | | Annual degradation | 0.35 %/yr | 0.35 %/yr | | Cell technology | Back Contact | Back Contact | | Cell type | Monocrystalline | Monocrystalline | | Cell count | 120 | 120 | | Bifacial | No | No | ## Thirty-year yield Each panel's own declared degradation curve, at 1,200 kWh/kWp a year Same temp coeff. for both panels (-0.260 %/°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, LA505:** 17,076 kWh - **Cumulative output, LA520:** 17,583 kWh - **Gap:** 507 kWh ## Output when hot | Condition | Cell temperature | LA505 | LA520 | Retained | | --- | --- | --- | --- | --- | | Standard test conditions | 25 °C | 505 W | 520 W | 100.0% of rated power | | Cool, bright day | 40 °C | 485 W | 500 W | 96.1% of rated power | | Typical summer roof | 55 °C | 466 W | 479 W | 92.2% of rated power | | Hot roof | 70 °C | 446 W | 459 W | 88.3% of rated power | ## Against the whole database | Measure | LA505 | LA520 | Out of | Note | | --- | --- | --- | --- | --- | | Efficiency | #2,714 | #716 | 14,005 | LA520 leads by 1,998 places | | Power density | #2,788 | #854 | 14,005 | LA520 leads by 1,934 places | | Heat behaviour | #511 | #511 | 14,005 | Tied - the same position in the database | | Weight | #1,199 | #635 | 14,005 | LA520 leads by 564 places | | Warranty | #21 | #21 | 14,005 | Tied - the same position in the database | | Overall | #3,916 | #2,566 | 14,005 | LA520 leads by 1,350 places | ## Questions ### Which panel is better: TCL Zhonghuan HSM-BD60-LA505 or TCL Zhonghuan HSM-BD60-LA520? According to our database: **TCL Zhonghuan HSM-BD60-LA520** has higher module efficiency (**23.50%** vs **22.80%**). See the full spec comparison and 30-year energy simulation above for a complete picture. ### What is the efficiency of TCL Zhonghuan HSM-BD60-LA505 and TCL Zhonghuan HSM-BD60-LA520? **TCL Zhonghuan HSM-BD60-LA505** has a module efficiency of **22.80%**, while **TCL Zhonghuan HSM-BD60-LA520** is **23.50%**. Higher efficiency means more electricity from the same roof area - useful when space is limited. ### What cell technology does TCL Zhonghuan HSM-BD60-LA505 use vs TCL Zhonghuan HSM-BD60-LA520? **TCL Zhonghuan HSM-BD60-LA505** uses **Back Contact** cells; **TCL Zhonghuan HSM-BD60-LA520** uses **Back Contact**. 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-BD60-LA505 and TCL Zhonghuan HSM-BD60-LA520? **TCL Zhonghuan HSM-BD60-LA505** has a **30 years** power warranty; **TCL Zhonghuan HSM-BD60-LA520** 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. ## Related comparisons - [TCL Zhonghuan HSM-BD60-LA505 vs TCL Zhonghuan HSM-BD60-LA515](https://comparepv.com/compare/tcl-zhonghuan-hsm-bd60-la505/tcl-zhonghuan-hsm-bd60-la515) - 3 differences, the largest is module efficiency - [TCL Zhonghuan HSM-BD60-LA505 vs TCL Zhonghuan HSM-BD60-LA510](https://comparepv.com/compare/tcl-zhonghuan-hsm-bd60-la505/tcl-zhonghuan-hsm-bd60-la510) - One difference: module efficiency - [TCL Zhonghuan HSM-BD60-LA505 vs TCL Zhonghuan HSM-BD60-LA500](https://comparepv.com/compare/tcl-zhonghuan-hsm-bd60-la505/tcl-zhonghuan-hsm-bd60-la500) - One difference: module efficiency - [TCL Zhonghuan HSM-BD60-LA505 vs TCL Zhonghuan HSM-ND66-GK725 (IEC1500V)](https://comparepv.com/compare/tcl-zhonghuan-hsm-bd60-la505/tcl-zhonghuan-hsm-nd66-gk725-iec1500v) - 16 differences, the largest is rated power - [TCL Zhonghuan HSM-BD60-LA505 vs TCL Zhonghuan HSM-ND66-GK725](https://comparepv.com/compare/tcl-zhonghuan-hsm-bd60-la505/tcl-zhonghuan-hsm-nd66-gk725) - 17 differences, the largest is rated power - [TCL Zhonghuan HSM-BD60-LA505 vs TCL Zhonghuan HSM-ND66-GK720 (IEC1500V)](https://comparepv.com/compare/tcl-zhonghuan-hsm-bd60-la505/tcl-zhonghuan-hsm-nd66-gk720-iec1500v) - 16 differences, the largest is rated power --- Source: https://comparepv.com/compare/tcl-zhonghuan-hsm-bd60-la505/tcl-zhonghuan-hsm-bd60-la520 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.