--- title: "Horay Solar HS640TC-MHD-D vs Horay Solar HS650TC-MHD-D - Solar Panel Comparison | ComparePV" description: "Compare Horay Solar HS640TC-MHD-D vs Horay Solar HS650TC-MHD-D side by side: what actually differs, output when it is hot, thirty-year production, and the full specification." source: "https://comparepv.com/compare/horay-solar-hs640tc-mhd-d/horay-solar-hs650tc-mhd-d" updated: 2026-09-11 --- # Horay Solar HS640TC-MHD-D vs Horay Solar HS650TC-MHD-D HS650TC-MHD-D leads on the differences that matter The largest is module efficiency: 0.40 pp more efficient. 16 of 19 comparable parameters are identical. ## The two panels | Attribute | A | B | | --- | --- | --- | | Panel | [Horay Solar HS640TC-MHD-D](https://comparepv.com/panel/horay-solar-hs640tc-mhd-d) | [Horay Solar HS650TC-MHD-D](https://comparepv.com/panel/horay-solar-hs650tc-mhd-d) | | Manufacturer | Horay Solar | Horay Solar | | Power | 640 Wp | 650 Wp | | Efficiency | 22.90 % | 23.30 % | | Technology | N-type | N-type | ## Where they differ Ranked by how much the difference matters, not by datasheet order. | Parameter | HS640TC-MHD-D | HS650TC-MHD-D | Difference | | --- | --- | --- | --- | | Module efficiency | 22.90 % | 23.30 % | +0.40 pp for HS650TC-MHD-D | | Power density | 229.0 Wp/m² | 232.5 Wp/m² | +3.6 Wp/m² for HS650TC-MHD-D | | Rated power | 640 Wp | 650 Wp | +10 W for HS650TC-MHD-D | ## Every compared parameter | Parameter | HS640TC-MHD-D | HS650TC-MHD-D | | --- | --- | --- | | Rated power | 640 Wp | 650 Wp | | Module efficiency | 22.90 % | 23.30 % | | Power density | 229.0 Wp/m² | 232.5 Wp/m² | | Open-circuit voltage | 48.08 V | 48.20 V | | Voltage at max power | 40.79 V | 40.89 V | | Short-circuit current | 16.71 A | 16.93 A | | Current at max power | 15.69 A | 15.90 A | | Temperature coefficient | -0.280 %/°C | -0.280 %/°C | | Dimensions | 2465x1134x30 mm | 2465x1134x30 mm | | Module area | 2.795 m² | 2.795 m² | | Weight | 34.5 kg | 34.5 kg | | Weight per kWp | 53.9 kg/kWp | 53.1 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 | 144 | 144 | | 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, HS640TC-MHD-D:** 21,473 kWh - **Cumulative output, HS650TC-MHD-D:** 21,809 kWh - **Gap:** 336 kWh ## Output when hot | Condition | Cell temperature | HS640TC-MHD-D | HS650TC-MHD-D | Retained | | --- | --- | --- | --- | --- | | Standard test conditions | 25 °C | 640 W | 650 W | 100.0% of rated power | | Cool, bright day | 40 °C | 613 W | 623 W | 95.8% of rated power | | Typical summer roof | 55 °C | 586 W | 595 W | 91.6% of rated power | | Hot roof | 70 °C | 559 W | 568 W | 87.4% of rated power | ## Against the whole database | Measure | HS640TC-MHD-D | HS650TC-MHD-D | Out of | Note | | --- | --- | --- | --- | --- | | Efficiency | #2,359 | #1,017 | 14,005 | HS650TC-MHD-D leads by 1,342 places | | Power density | #2,389 | #1,222 | 14,005 | HS650TC-MHD-D leads by 1,167 places | | Heat behaviour | #1,309 | #1,309 | 14,005 | Tied - the same position in the database | | Weight | #8,037 | #6,836 | 14,005 | HS650TC-MHD-D leads by 1,201 places | | Warranty | #21 | #21 | 14,005 | Tied - the same position in the database | | Overall | #1,704 | #1,318 | 14,005 | HS650TC-MHD-D leads by 386 places | ## Questions ### Which panel is better: Horay Solar HS640TC-MHD-D or Horay Solar HS650TC-MHD-D? According to our database: **Horay Solar HS650TC-MHD-D** has higher module efficiency (**23.30%** vs **22.90%**). See the full spec comparison and 30-year energy simulation above for a complete picture. ### What is the efficiency of Horay Solar HS640TC-MHD-D and Horay Solar HS650TC-MHD-D? **Horay Solar HS640TC-MHD-D** has a module efficiency of **22.90%**, while **Horay Solar HS650TC-MHD-D** is **23.30%**. Higher efficiency means more electricity from the same roof area - useful when space is limited. ### What cell technology does Horay Solar HS640TC-MHD-D use vs Horay Solar HS650TC-MHD-D? **Horay Solar HS640TC-MHD-D** uses **N-type** cells; **Horay Solar HS650TC-MHD-D** 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 Horay Solar HS640TC-MHD-D and Horay Solar HS650TC-MHD-D? **Horay Solar HS640TC-MHD-D** has a **30 years** power warranty; **Horay Solar HS650TC-MHD-D** 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 Horay Solar HS640TC-MHD-D and Horay Solar HS650TC-MHD-D bifacial panels? Both **Horay Solar HS640TC-MHD-D** and **Horay Solar HS650TC-MHD-D** 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 - [Horay Solar HS640TC-MHD-D vs Horay Solar HS645TC-MHD-D](https://comparepv.com/compare/horay-solar-hs640tc-mhd-d/horay-solar-hs645tc-mhd-d) - One difference: module efficiency - [Horay Solar HS640TC-MHD-D vs Horay Solar HS635TC-MHD-D](https://comparepv.com/compare/horay-solar-hs640tc-mhd-d/horay-solar-hs635tc-mhd-d) - One difference: module efficiency - [Horay Solar HS640TC-MHD-D vs Horay Solar HS630TC-MHD-D](https://comparepv.com/compare/horay-solar-hs640tc-mhd-d/horay-solar-hs630tc-mhd-d) - 3 differences, the largest is module efficiency - [Horay Solar HS640TC-MHD-D vs Horay Solar HS720TC-MHG-D](https://comparepv.com/compare/horay-solar-hs640tc-mhd-d/horay-solar-hs720tc-mhg-d) - 10 differences, the largest is rated power - [Horay Solar HS640TC-MHD-D vs Horay Solar HS710TC-MHG-D](https://comparepv.com/compare/horay-solar-hs640tc-mhd-d/horay-solar-hs710tc-mhg-d) - 8 differences, the largest is rated power - [Horay Solar HS640TC-MHD-D vs Horay Solar HS700TC-MHG-D](https://comparepv.com/compare/horay-solar-hs640tc-mhd-d/horay-solar-hs700tc-mhg-d) - 10 differences, the largest is rated power --- Source: https://comparepv.com/compare/horay-solar-hs640tc-mhd-d/horay-solar-hs650tc-mhd-d 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.