--- title: "Horay Solar HS615TC-MHC-D vs Horay Solar HS620TC-MHC-D - Solar Panel Comparison | ComparePV" description: "Compare Horay Solar HS615TC-MHC-D vs Horay Solar HS620TC-MHC-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-hs615tc-mhc-d/horay-solar-hs620tc-mhc-d" updated: 2026-09-11 --- # Horay Solar HS615TC-MHC-D vs Horay Solar HS620TC-MHC-D Identical on every published parameter All 18 comparable parameters agree, with 1 more left out because at least one datasheet does not publish it. 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 | [Horay Solar HS615TC-MHC-D](https://comparepv.com/panel/horay-solar-hs615tc-mhc-d) | [Horay Solar HS620TC-MHC-D](https://comparepv.com/panel/horay-solar-hs620tc-mhc-d) | | Manufacturer | Horay Solar | Horay Solar | | Power | 615 Wp | 620 Wp | | Efficiency | 22.80 % | 22.90 % | | Technology | TOPCon | TOPCon | ## Every compared parameter | Parameter | HS615TC-MHC-D | HS620TC-MHC-D | | --- | --- | --- | | Rated power | 615 Wp | 620 Wp | | Module efficiency | 22.80 % | 22.90 % | | Power density | 227.7 Wp/m² | 229.5 Wp/m² | | Open-circuit voltage | 49.16 V | 49.40 V | | Voltage at max power | 40.85 V | 41.05 V | | Short-circuit current | 15.90 A | 15.95 A | | Current at max power | 15.05 A | 15.10 A | | Temperature coefficient | -0.280 %/°C | -0.280 %/°C | | Dimensions | 2382x1134x30 mm | 2382x1134x30 mm | | Module area | 2.701 m² | 2.701 m² | | Weight | 33.7 kg | 33.7 kg | | Weight per kWp | 54.8 kg/kWp | 54.4 kg/kWp | | Product warranty | 15 yrs | 15 yrs | | Performance warranty | 30 yrs | 30 yrs | | Annual degradation | - | - | | Cell technology | TOPCon | 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, HS615TC-MHC-D:** 20,634 kWh - **Cumulative output, HS620TC-MHC-D:** 20,802 kWh - **Gap:** 168 kWh ## Output when hot | Condition | Cell temperature | HS615TC-MHC-D | HS620TC-MHC-D | Retained | | --- | --- | --- | --- | --- | | Standard test conditions | 25 °C | 615 W | 620 W | 100.0% of rated power | | Cool, bright day | 40 °C | 589 W | 594 W | 95.8% of rated power | | Typical summer roof | 55 °C | 563 W | 568 W | 91.6% of rated power | | Hot roof | 70 °C | 538 W | 542 W | 87.4% of rated power | ## Against the whole database | Measure | HS615TC-MHC-D | HS620TC-MHC-D | Out of | Note | | --- | --- | --- | --- | --- | | Efficiency | #2,714 | #2,359 | 14,005 | HS620TC-MHC-D leads by 355 places | | Power density | #3,077 | #2,191 | 14,005 | HS620TC-MHC-D leads by 886 places | | Heat behaviour | #1,309 | #1,309 | 14,005 | Tied - the same position in the database | | Weight | #9,202 | #8,659 | 14,005 | HS620TC-MHC-D leads by 543 places | | Warranty | #21 | #21 | 14,005 | Tied - the same position in the database | | Overall | #2,361 | #2,145 | 14,005 | HS620TC-MHC-D leads by 216 places | ## Questions ### Which panel is better: Horay Solar HS615TC-MHC-D or Horay Solar HS620TC-MHC-D? According to our database: **Horay Solar HS620TC-MHC-D** has higher module efficiency (**22.90%** vs **22.80%**). See the full spec comparison and 30-year energy simulation above for a complete picture. ### What is the efficiency of Horay Solar HS615TC-MHC-D and Horay Solar HS620TC-MHC-D? **Horay Solar HS615TC-MHC-D** has a module efficiency of **22.80%**, while **Horay Solar HS620TC-MHC-D** is **22.90%**. Higher efficiency means more electricity from the same roof area - useful when space is limited. ### What cell technology does Horay Solar HS615TC-MHC-D use vs Horay Solar HS620TC-MHC-D? **Horay Solar HS615TC-MHC-D** uses **TOPCon** cells; **Horay Solar HS620TC-MHC-D** 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 Horay Solar HS615TC-MHC-D and Horay Solar HS620TC-MHC-D? **Horay Solar HS615TC-MHC-D** has a **30 years** power warranty; **Horay Solar HS620TC-MHC-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 HS615TC-MHC-D and Horay Solar HS620TC-MHC-D bifacial panels? Both **Horay Solar HS615TC-MHC-D** and **Horay Solar HS620TC-MHC-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 HS615TC-MHC-D vs Horay Solar HS630TC-MHC-D](https://comparepv.com/compare/horay-solar-hs615tc-mhc-d/horay-solar-hs630tc-mhc-d) - 3 differences, the largest is module efficiency - [Horay Solar HS615TC-MHC-D vs Horay Solar HS625TC-MHC-D](https://comparepv.com/compare/horay-solar-hs615tc-mhc-d/horay-solar-hs625tc-mhc-d) - 3 differences, the largest is module efficiency - [Horay Solar HS615TC-MHC-D vs Horay Solar HS610TC-MHC-D](https://comparepv.com/compare/horay-solar-hs615tc-mhc-d/horay-solar-hs610tc-mhc-d) - One difference: module efficiency - [Horay Solar HS615TC-MHC-D vs Horay Solar HS720TC-MHG-D](https://comparepv.com/compare/horay-solar-hs615tc-mhc-d/horay-solar-hs720tc-mhg-d) - 8 differences, the largest is rated power - [Horay Solar HS615TC-MHC-D vs Horay Solar HS710TC-MHG-D](https://comparepv.com/compare/horay-solar-hs615tc-mhc-d/horay-solar-hs710tc-mhg-d) - 6 differences, the largest is rated power - [Horay Solar HS615TC-MHC-D vs Horay Solar HS700TC-MHG-D](https://comparepv.com/compare/horay-solar-hs615tc-mhc-d/horay-solar-hs700tc-mhg-d) - 7 differences, the largest is rated power --- Source: https://comparepv.com/compare/horay-solar-hs615tc-mhc-d/horay-solar-hs620tc-mhc-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.